File content as of revision 0:c8a2256e02c2:

// PAA5100JE-Q: Optical Tracking Chip reference code.
// Version: 1.0
// Latest Revision Date: 4 Apr. 2018
// By PixArt Imaging Inc.
// Primary Engineer: Vincent Yeh (PixArt USA)

/*
//=======================
//Revision History
//=======================
Version 1.0 -- 4 Apr. 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;
    }
    
    
    startupCheck();
    if(startupFail == 3)
    {
        pc.printf("Start-up failed! Power cycle the chip and try again.\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();
        }
    }
}