PixArt / Mbed OS 3901_referenceFirmware

Reference firmware for PixArt's PMW3901MB sensor and evaluation board. "Hello World" and "Library" contain the exact same files. Please import just one of the two into your mBed compiler as a new program and not as a library.

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 }