PixArt / Mbed OS 3901_referenceFirmware

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Welcome to the code repository for PixArt's PMW3901MB sensor and evaluation board.

For general information about this product, please visit this product's components page here:
https://os.mbed.com/components/PMW3901MB-Far-Field-Optical-Motion-Track/

For guides and tips on how to setup and evaluate the PMW3901MB sensor with the Nordic nRF52-DK microcontroller using this reference code, please visit this guide:
https://os.mbed.com/teams/PixArt/code/3901_referenceFirmware/wiki/Guide-for-nRF52-DK-Platform

For guides and tips on how to setup and evaluate the PMW3901MB sensor with any microcontroller using this reference code, please visit this guide:
https://os.mbed.com/teams/PixArt/code/3901_referenceFirmware/wiki/Guide-for-Any-Platform

main.cpp@1:10365086d44e, 2018-07-18 (annotated)

Committer:
PixArtVY
Date:
Wed Jul 18 18:37:21 2018 +0000
Revision:
1:10365086d44e
Parent:
0:c00f2464eee3 
Added Apache License notice.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
PixArtVY 0:c00f2464eee3 1 // PMW3901MB: Optical Motion Tracking Chip reference code.
PixArtVY 1:10365086d44e 2 // Version: 1.1
PixArtVY 1:10365086d44e 3 // Latest Revision Date: 18 July 2018
PixArtVY 0:c00f2464eee3 4 // By PixArt Imaging Inc.
PixArtVY 0:c00f2464eee3 5 // Primary Engineer: Vincent Yeh (PixArt USA)
PixArtVY 0:c00f2464eee3 6
PixArtVY 1:10365086d44e 7 // Copyright [2018] [Vincent Yeh]
PixArtVY 1:10365086d44e 8 // Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at:
PixArtVY 1:10365086d44e 9 // http://www.apache.org/licenses/LICENSE-2.0
PixArtVY 1:10365086d44e 10
PixArtVY 1:10365086d44e 11
PixArtVY 0:c00f2464eee3 12 /*
PixArtVY 0:c00f2464eee3 13 //=======================
PixArtVY 0:c00f2464eee3 14 //Revision History
PixArtVY 0:c00f2464eee3 15 //=======================
PixArtVY 1:10365086d44e 16 Version 1.1 -- 18 July 2018
PixArtVY 1:10365086d44e 17 Added apache license notice.
PixArtVY 1:10365086d44e 18
PixArtVY 0:c00f2464eee3 19 Version 1.0 -- 13 Mar. 2018
PixArtVY 0:c00f2464eee3 20 First release.
PixArtVY 0:c00f2464eee3 21 */
PixArtVY 0:c00f2464eee3 22
PixArtVY 0:c00f2464eee3 23 #include "mbed.h"
PixArtVY 0:c00f2464eee3 24 #include "SPIcommFunctions.h"
PixArtVY 0:c00f2464eee3 25
PixArtVY 0:c00f2464eee3 26 int main()
PixArtVY 0:c00f2464eee3 27 {
PixArtVY 0:c00f2464eee3 28 pc.baud(115200); // Set baud rate to 115200. Remember to sync serial terminal baud rate to the same value.
PixArtVY 0:c00f2464eee3 29
PixArtVY 0:c00f2464eee3 30 spi.format(8,3); // Set SPI to 8 bits with inverted polarity and phase-shifted to second edge.
PixArtVY 0:c00f2464eee3 31 spi.frequency(1000000); // Set frequency for SPI communication.
PixArtVY 0:c00f2464eee3 32 cs = 1; // Initialize chip select as inactive.
PixArtVY 0:c00f2464eee3 33
PixArtVY 0:c00f2464eee3 34 pc.printf("Program START\n\r");
PixArtVY 0:c00f2464eee3 35
PixArtVY 0:c00f2464eee3 36 pc.printf("ID Check: %2X\n\r", readRegister(0x00)); //Checks product ID to make sure communication protocol is working properly.
PixArtVY 0:c00f2464eee3 37 if(readRegister(0x00) != 0x49)
PixArtVY 0:c00f2464eee3 38 {
PixArtVY 0:c00f2464eee3 39 pc.printf("Communication protocol error! Terminating program.\n\r");
PixArtVY 0:c00f2464eee3 40 return 0;
PixArtVY 0:c00f2464eee3 41 }
PixArtVY 0:c00f2464eee3 42
PixArtVY 0:c00f2464eee3 43 initializeSensor();
PixArtVY 0:c00f2464eee3 44
PixArtVY 0:c00f2464eee3 45 while(1)
PixArtVY 0:c00f2464eee3 46 {
PixArtVY 0:c00f2464eee3 47 //pc.printf("MOTION bit: %2X\n\r", (readRegister(0x02) & 0x80) >> 7); //Prints motion bit for debugging. 1 = motion detected. 0 = no motion detected.
PixArtVY 0:c00f2464eee3 48
PixArtVY 0:c00f2464eee3 49 if(readRegister(0x02) & 0x80)
PixArtVY 0:c00f2464eee3 50 {
PixArtVY 0:c00f2464eee3 51 grabData();
PixArtVY 0:c00f2464eee3 52 printData();
PixArtVY 0:c00f2464eee3 53 }
PixArtVY 0:c00f2464eee3 54 }
PixArtVY 0:c00f2464eee3 55 }