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
Diff: main.cpp
- Revision:
- 0:c00f2464eee3
- Child:
- 1:10365086d44e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Wed Mar 14 21:22:43 2018 +0000 @@ -0,0 +1,47 @@ +// PMW3901MB: Optical Motion Tracking Chip reference code. +// Version: 1.0 +// Latest Revision Date: 13 Mar. 2018 +// By PixArt Imaging Inc. +// Primary Engineer: Vincent Yeh (PixArt USA) + +/* +//======================= +//Revision History +//======================= +Version 1.0 -- 13 Mar. 2018 +First release. +*/ + +#include "mbed.h" +#include "SPIcommFunctions.h" + +int main() +{ + pc.baud(115200); // Set baud rate to 115200. Remember to sync serial terminal baud rate to the same value. + + spi.format(8,3); // Set SPI to 8 bits with inverted polarity and phase-shifted to second edge. + spi.frequency(1000000); // Set frequency for SPI communication. + cs = 1; // Initialize chip select as inactive. + + pc.printf("Program START\n\r"); + + pc.printf("ID Check: %2X\n\r", readRegister(0x00)); //Checks product ID to make sure communication protocol is working properly. + if(readRegister(0x00) != 0x49) + { + pc.printf("Communication protocol error! Terminating program.\n\r"); + return 0; + } + + initializeSensor(); + + while(1) + { + //pc.printf("MOTION bit: %2X\n\r", (readRegister(0x02) & 0x80) >> 7); //Prints motion bit for debugging. 1 = motion detected. 0 = no motion detected. + + if(readRegister(0x02) & 0x80) + { + grabData(); + printData(); + } + } +}