PixArt / Mbed OS 9130_referenceCode

Reference firmware for PixArt's PAT9130EW 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.

main.cpp@1:efa5e5a1e308, 2018-07-18 (annotated)

Committer:
PixArtVY
Date:
Wed Jul 18 18:33:03 2018 +0000
Revision:
1:efa5e5a1e308
Parent:
0:5a34a4387fb0 
Added Apache License notice.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
PixArtVY 0:5a34a4387fb0 1 // PAT9130EW: Optical Tracking Miniature Chip reference code.
PixArtVY 1:efa5e5a1e308 2 // Version: 1.1
PixArtVY 1:efa5e5a1e308 3 // Latest Revision Date: 18 July 2018
PixArtVY 0:5a34a4387fb0 4 // By PixArt Imaging Inc.
PixArtVY 0:5a34a4387fb0 5 // Primary Engineer: Vincent Yeh (PixArt USA)
PixArtVY 0:5a34a4387fb0 6
PixArtVY 1:efa5e5a1e308 7 // Copyright [2018] [Vincent Yeh]
PixArtVY 1:efa5e5a1e308 8 // 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:
PixArtVY 1:efa5e5a1e308 9 // http://www.apache.org/licenses/LICENSE-2.0
PixArtVY 1:efa5e5a1e308 10
PixArtVY 1:efa5e5a1e308 11
PixArtVY 0:5a34a4387fb0 12 /*
PixArtVY 0:5a34a4387fb0 13 //=======================
PixArtVY 0:5a34a4387fb0 14 //Revision History
PixArtVY 0:5a34a4387fb0 15 //=======================
PixArtVY 1:efa5e5a1e308 16 Version 1.1 -- 18 July 2018
PixArtVY 1:efa5e5a1e308 17 Added apache license notice.
PixArtVY 1:efa5e5a1e308 18
PixArtVY 0:5a34a4387fb0 19 Version 1.0 -- 16 Apr. 2018
PixArtVY 0:5a34a4387fb0 20 First release.
PixArtVY 0:5a34a4387fb0 21 */
PixArtVY 0:5a34a4387fb0 22
PixArtVY 0:5a34a4387fb0 23 #include "mbed.h"
PixArtVY 0:5a34a4387fb0 24 #include "registerArrays.h"
PixArtVY 0:5a34a4387fb0 25 #include "SPIcommFunctions.h"
PixArtVY 0:5a34a4387fb0 26
PixArtVY 0:5a34a4387fb0 27 int main()
PixArtVY 0:5a34a4387fb0 28 {
PixArtVY 0:5a34a4387fb0 29 pc.baud(115200); // Set baud rate to 115200. Remember to sync serial terminal baud rate to the same value.
PixArtVY 0:5a34a4387fb0 30
PixArtVY 0:5a34a4387fb0 31 spi.format(8,3); // Set SPI to 8 bits with inverted polarity and phase-shifted to second edge.
PixArtVY 0:5a34a4387fb0 32 spi.frequency(1000000); // Set frequency for SPI communication.
PixArtVY 0:5a34a4387fb0 33 cs = 1; // Initialize chip select as inactive.
PixArtVY 0:5a34a4387fb0 34
PixArtVY 0:5a34a4387fb0 35 pc.printf("Program START\n\r");
PixArtVY 0:5a34a4387fb0 36
PixArtVY 0:5a34a4387fb0 37 pc.printf("ID Check: %2X\n\r", readRegister(0x00)); //Checks product ID to make sure communication protocol is working properly.
PixArtVY 0:5a34a4387fb0 38 if(readRegister(0x00) != 0x31)
PixArtVY 0:5a34a4387fb0 39 {
PixArtVY 0:5a34a4387fb0 40 pc.printf("Communication protocol error! Terminating program.\n\r");
PixArtVY 0:5a34a4387fb0 41 return 0;
PixArtVY 0:5a34a4387fb0 42 }
PixArtVY 0:5a34a4387fb0 43
PixArtVY 0:5a34a4387fb0 44 writeRegister(0x06, 0x80); //Software reset (i.e. set bit7 to 1)
PixArtVY 0:5a34a4387fb0 45 wait_ms(1); //Delay 1 ms for chip reset timing.
PixArtVY 0:5a34a4387fb0 46
PixArtVY 0:5a34a4387fb0 47 pc.printf("ID Check #2: %2X\n\r", readRegister(0x00)); //Checks product ID after resetting to make sure communication protocol is working properly.
PixArtVY 0:5a34a4387fb0 48 if(readRegister(0x00) != 0x31)
PixArtVY 0:5a34a4387fb0 49 {
PixArtVY 0:5a34a4387fb0 50 pc.printf("Communication protocol error! Terminating program.\n\r");
PixArtVY 0:5a34a4387fb0 51 return 0;
PixArtVY 0:5a34a4387fb0 52 }
PixArtVY 0:5a34a4387fb0 53
PixArtVY 0:5a34a4387fb0 54 load(initialize, initialize_size); //Load register settings from the "initialize" array (see registerArrays.h)
PixArtVY 0:5a34a4387fb0 55
PixArtVY 0:5a34a4387fb0 56 while(1)
PixArtVY 0:5a34a4387fb0 57 {
PixArtVY 0:5a34a4387fb0 58 //pc.printf("MOTION bit: %2X\n\r", (readRegister(0x02) & 0x80) >> 7); //Prints motion bit for debugging. 1 = motion detected. 0 = no motion detected.
PixArtVY 0:5a34a4387fb0 59
PixArtVY 0:5a34a4387fb0 60 if(readRegister(0x02) & 0x80)
PixArtVY 0:5a34a4387fb0 61 {
PixArtVY 0:5a34a4387fb0 62 grabData();
PixArtVY 0:5a34a4387fb0 63 printData();
PixArtVY 0:5a34a4387fb0 64 }
PixArtVY 0:5a34a4387fb0 65 }
PixArtVY 0:5a34a4387fb0 66 }