PixArt / Mbed OS 9125_referenceCode

Reference firmware for PixArt's PAT9125EL 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 PAT9125EL sensor and evaluation board.

For general information about this product, please visit this product's components page here:
https://os.mbed.com/components/PAT9125EL-Evaluation-Board/

For guides and tips on how to setup and evaluate the PAT9125EL sensor with the Nordic nRF52-DK microcontroller using this reference code, please visit this guide:
https://os.mbed.com/teams/PixArt/code/9125_referenceCode/wiki/Guide-for-nRF52-DK-Platform

For guides and tips on how to setup and evaluate the PAT9125EL sensor with any microcontroller using this reference code, please visit this guide:
https://os.mbed.com/teams/PixArt/code/9125_referenceCode/wiki/Guide-for-Any-Platform

main.cpp@0:e9cce1154246, 2018-02-23 (annotated)

Committer:
PixArtVY
Date:
Fri Feb 23 23:32:40 2018 +0000
Revision:
0:e9cce1154246
Child:
2:bebddee7347e
First release of 9125 firmware.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
PixArtVY 0:e9cce1154246 1 // PAT9125EL: Miniature Optical Navigation Chip reference code.
PixArtVY 0:e9cce1154246 2 // Version: 1.0
PixArtVY 0:e9cce1154246 3 // Latest Revision Date: 16 Feb. 2018
PixArtVY 0:e9cce1154246 4 // By PixArt Imaging Inc.
PixArtVY 0:e9cce1154246 5 // Primary Engineer: Vincent Yeh (PixArt USA)
PixArtVY 0:e9cce1154246 6
PixArtVY 0:e9cce1154246 7 /*
PixArtVY 0:e9cce1154246 8 //=======================
PixArtVY 0:e9cce1154246 9 //Revision History
PixArtVY 0:e9cce1154246 10 //=======================
PixArtVY 0:e9cce1154246 11 Version 1.0 -- 16 Feb. 2018
PixArtVY 0:e9cce1154246 12 First release.
PixArtVY 0:e9cce1154246 13 */
PixArtVY 0:e9cce1154246 14
PixArtVY 0:e9cce1154246 15 #include "mbed.h"
PixArtVY 0:e9cce1154246 16 #include "registerArrays.h"
PixArtVY 0:e9cce1154246 17 //#include "SPIcommFunctions.h"
PixArtVY 0:e9cce1154246 18 #include "I2CcommFunctions.h"
PixArtVY 0:e9cce1154246 19 //Make sure you only have SPIcommFunctions or I2CcommFunctions enabled. You cannot include both headers.
PixArtVY 0:e9cce1154246 20
PixArtVY 0:e9cce1154246 21 int main()
PixArtVY 0:e9cce1154246 22 {
PixArtVY 0:e9cce1154246 23 pc.baud(115200); // Set baud rate to 115200. Remember to sync serial terminal baud rate to the same value.
PixArtVY 0:e9cce1154246 24
PixArtVY 0:e9cce1154246 25 #ifdef SPImode
PixArtVY 0:e9cce1154246 26 spi.format(8,3); // Set SPI to 8 bits with inverted polarity and phase-shifted to second edge.
PixArtVY 0:e9cce1154246 27 spi.frequency(1000000); // Set frequency for SPI communication.
PixArtVY 0:e9cce1154246 28 cs = 1; // Initialize chip select as inactive.
PixArtVY 0:e9cce1154246 29 #endif
PixArtVY 0:e9cce1154246 30
PixArtVY 0:e9cce1154246 31 #ifdef I2Cmode
PixArtVY 0:e9cce1154246 32 i2c.frequency(400000); // Set frequency for I2C communication.
PixArtVY 0:e9cce1154246 33 #endif
PixArtVY 0:e9cce1154246 34
PixArtVY 0:e9cce1154246 35 pc.printf("Program START\n\r");
PixArtVY 0:e9cce1154246 36
PixArtVY 0:e9cce1154246 37 pc.printf("ID Check: %2X\n\r", readRegister(0x00)); //Checks product ID to make sure communication protocol is working properly.
PixArtVY 0:e9cce1154246 38 if(readRegister(0x00) != 0x31)
PixArtVY 0:e9cce1154246 39 {
PixArtVY 0:e9cce1154246 40 pc.printf("Communication protocol error! Terminating program.\n\r");
PixArtVY 0:e9cce1154246 41 return 0;
PixArtVY 0:e9cce1154246 42 }
PixArtVY 0:e9cce1154246 43
PixArtVY 0:e9cce1154246 44 writeRegister(0x06, 0x97); //Software reset (i.e. set bit7 to 1)
PixArtVY 0:e9cce1154246 45 wait_ms(1); //Delay 1 ms for chip reset timing.
PixArtVY 0:e9cce1154246 46 writeRegister(0x06, 0x17); //Ensure software reset is done and chip is no longer in that state.
PixArtVY 0:e9cce1154246 47
PixArtVY 0:e9cce1154246 48 load(initialize, initialize_size); //Load register settings from the "initialize" array
PixArtVY 0:e9cce1154246 49
PixArtVY 0:e9cce1154246 50
PixArtVY 0:e9cce1154246 51
PixArtVY 0:e9cce1154246 52 if(readRegister(0x5E) == 0x04) //These unlisted registers are used for internal recommended settings.
PixArtVY 0:e9cce1154246 53 {
PixArtVY 0:e9cce1154246 54 writeRegister(0x5E, 0x08);
PixArtVY 0:e9cce1154246 55
PixArtVY 0:e9cce1154246 56 if(readRegister(0x5D) == 0x10)
PixArtVY 0:e9cce1154246 57 writeRegister(0x5D, 0x19);
PixArtVY 0:e9cce1154246 58 }
PixArtVY 0:e9cce1154246 59
PixArtVY 0:e9cce1154246 60 writeRegister(0x09, 0x00); // enable write protect
PixArtVY 0:e9cce1154246 61
PixArtVY 0:e9cce1154246 62 while(1)
PixArtVY 0:e9cce1154246 63 {
PixArtVY 0:e9cce1154246 64 //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:e9cce1154246 65
PixArtVY 0:e9cce1154246 66 if(readRegister(0x02) & 0x80)
PixArtVY 0:e9cce1154246 67 {
PixArtVY 0:e9cce1154246 68 grabData();
PixArtVY 0:e9cce1154246 69 printData();
PixArtVY 0:e9cce1154246 70 }
PixArtVY 0:e9cce1154246 71 }
PixArtVY 0:e9cce1154246 72 }