PixArt / Mbed OS 9125_referenceCode

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

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

Committer:
PixArtVY
Date:
2018-02-23
Revision:
0:e9cce1154246
Child:
2:bebddee7347e

File content as of revision 0:e9cce1154246:

// PAT9125EL: Miniature Optical Navigation Chip reference code.
// Version: 1.0
// Latest Revision Date: 16 Feb. 2018
// By PixArt Imaging Inc.
// Primary Engineer: Vincent Yeh (PixArt USA)

/*
//=======================
//Revision History
//=======================
Version 1.0 -- 16 Feb. 2018
First release.
*/

#include "mbed.h"
#include "registerArrays.h"
//#include "SPIcommFunctions.h"
#include "I2CcommFunctions.h"
//Make sure you only have SPIcommFunctions or I2CcommFunctions enabled. You cannot include both headers.

int main()
{
    pc.baud(115200);                    // Set baud rate to 115200. Remember to sync serial terminal baud rate to the same value.

    #ifdef SPImode
    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.
    #endif
    
    #ifdef I2Cmode
    i2c.frequency(400000);              // Set frequency for I2C communication.
    #endif
    
    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) != 0x31)
    {
        pc.printf("Communication protocol error! Terminating program.\n\r");
        return 0;
    }
    
    writeRegister(0x06, 0x97);          //Software reset (i.e. set bit7 to 1)
    wait_ms(1);                         //Delay 1 ms for chip reset timing.
    writeRegister(0x06, 0x17);          //Ensure software reset is done and chip is no longer in that state.
    
    load(initialize, initialize_size);  //Load register settings from the "initialize" array
    
    
    
    if(readRegister(0x5E) == 0x04)      //These unlisted registers are used for internal recommended settings.
    {
        writeRegister(0x5E, 0x08);
        
        if(readRegister(0x5D) == 0x10)
            writeRegister(0x5D, 0x19);
    }
    
    writeRegister(0x09, 0x00);  // enable write protect 
    
    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();
        }
    }
}