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

Committer:
PixArtVY
Date:
2018-07-23
Revision:
5:577976dae20d
Parent:
4:8f7d8ff001f8

File content as of revision 5:577976dae20d:

// PAT9125EL: Miniature Optical Navigation Chip reference code.
// Version: 1.2
// Latest Revision Date: 23 July 2018
// By PixArt Imaging Inc.
// Primary Engineer: Vincent Yeh (PixArt USA)

// Copyright [2018] [Vincent Yeh]
// 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:
// http://www.apache.org/licenses/LICENSE-2.0


/*
//=======================
//Revision History
//=======================
Version 1.2 -- 23 July 2018
-Changed SPI frequency to 2MHz.
-Changed SPI timing for the readRegister function.

Version 1.1 -- 18 July 2018
-Added apache license notice.

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(2000000);             // 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();
        }
    }
}