main.cpp

00001 // ADBM-A350: Finger navigation chip.
00002 // Version: 1.1
00003 // Latest Revision Date: 18 July 2018
00004 // By PixArt Imaging Inc.
00005 // Primary Engineer: Vincent Yeh (PixArt USA)
00006 
00007 // Copyright [2018] [Vincent Yeh]
00008 // 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:
00009 // http://www.apache.org/licenses/LICENSE-2.0
00010 
00011 
00012 /*
00013 //=======================
00014 //Revision History
00015 //=======================
00016 Version 1.1 -- 18 July 2018
00017 Added apache license notice.
00018 
00019 Version 1.0 -- 14 June 2018
00020 First release.
00021 */
00022 
00023 #include "mbed.h"
00024 #include "registerArrays.h"
00025 //#include "I2CcommFunctions.h"
00026 #include "SPIcommFunctions.h"
00027 //Make sure you only have one of either SPIcommFunctions or I2CcommFunctions enabled. You cannot include both headers.
00028 
00029 int main()
00030 {
00031     pc.baud(115200);                    // Set baud rate to 115200. Remember to sync serial terminal baud rate to the same value.
00032 
00033     #ifdef SPImode
00034     IO_sel = 1;                         // Set IO_select pin to be HIGH for SPI.
00035     spi.format(8,3);                    // Set SPI to 8 bits with inverted polarity and phase-shifted to second edge.
00036     spi.frequency(100000);             // Set frequency for SPI communication.
00037     cs = 1;                             // Initialize chip select as inactive.
00038     #endif
00039     
00040     #ifdef I2Cmode
00041     IO_sel = 0;                         // Set IO_select pin to be LOW for I2C.
00042     i2c.frequency(400000);              // Set frequency for I2C communication.
00043     cs = 1;                             // These two pins are used to determine the device's slave ID.
00044     MOSI = 1;
00045     #endif
00046     
00047     shutdown = 0;
00048     writeRegister(0x3A, 0x5A);          //Soft-reset the chip.
00049     
00050     pc.printf("Program START\n\r");
00051     
00052     pc.printf("ID Check: %2X\n\r", readRegister(0x00)); //Checks product ID to make sure communication protocol is working properly.
00053     if(readRegister(0x00) != 0x88)
00054     {
00055         pc.printf("Communication protocol error! Terminating program.\n\r");
00056         return 0;
00057     }
00058     
00059     load(initialize, initialize_size);  //Load register settings from the "initialize" array (see registerArrays.h)
00060     
00061     while(1)
00062     {
00063         //pc.printf("MOTION bit: %2X\n\r", readRegister(0x02));   //Prints EVENT register for debugging.
00064         
00065         if(readRegister(0x02) & 0x80)
00066         {
00067             grabData();
00068             printData();
00069         }
00070     }
00071 }