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@0:5a34a4387fb0, 2018-04-20 (annotated)

Committer:
PixArtVY
Date:
Fri Apr 20 22:33:08 2018 +0000
Revision:
0:5a34a4387fb0
Child:
1:efa5e5a1e308
First revision.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
PixArtVY 0:5a34a4387fb0 1 // PAT9130EW: Optical Tracking Miniature Chip reference code.
PixArtVY 0:5a34a4387fb0 2 // Version: 1.0
PixArtVY 0:5a34a4387fb0 3 // Latest Revision Date: 16 Apr. 2018
PixArtVY 0:5a34a4387fb0 4 // By PixArt Imaging Inc.
PixArtVY 0:5a34a4387fb0 5 // Primary Engineer: Vincent Yeh (PixArt USA)
PixArtVY 0:5a34a4387fb0 6
PixArtVY 0:5a34a4387fb0 7 /*
PixArtVY 0:5a34a4387fb0 8 //=======================
PixArtVY 0:5a34a4387fb0 9 //Revision History
PixArtVY 0:5a34a4387fb0 10 //=======================
PixArtVY 0:5a34a4387fb0 11 Version 1.0 -- 16 Apr. 2018
PixArtVY 0:5a34a4387fb0 12 First release.
PixArtVY 0:5a34a4387fb0 13 */
PixArtVY 0:5a34a4387fb0 14
PixArtVY 0:5a34a4387fb0 15 #include "mbed.h"
PixArtVY 0:5a34a4387fb0 16 #include "registerArrays.h"
PixArtVY 0:5a34a4387fb0 17 #include "SPIcommFunctions.h"
PixArtVY 0:5a34a4387fb0 18
PixArtVY 0:5a34a4387fb0 19 int main()
PixArtVY 0:5a34a4387fb0 20 {
PixArtVY 0:5a34a4387fb0 21 pc.baud(115200); // Set baud rate to 115200. Remember to sync serial terminal baud rate to the same value.
PixArtVY 0:5a34a4387fb0 22
PixArtVY 0:5a34a4387fb0 23 spi.format(8,3); // Set SPI to 8 bits with inverted polarity and phase-shifted to second edge.
PixArtVY 0:5a34a4387fb0 24 spi.frequency(1000000); // Set frequency for SPI communication.
PixArtVY 0:5a34a4387fb0 25 cs = 1; // Initialize chip select as inactive.
PixArtVY 0:5a34a4387fb0 26
PixArtVY 0:5a34a4387fb0 27 pc.printf("Program START\n\r");
PixArtVY 0:5a34a4387fb0 28
PixArtVY 0:5a34a4387fb0 29 pc.printf("ID Check: %2X\n\r", readRegister(0x00)); //Checks product ID to make sure communication protocol is working properly.
PixArtVY 0:5a34a4387fb0 30 if(readRegister(0x00) != 0x31)
PixArtVY 0:5a34a4387fb0 31 {
PixArtVY 0:5a34a4387fb0 32 pc.printf("Communication protocol error! Terminating program.\n\r");
PixArtVY 0:5a34a4387fb0 33 return 0;
PixArtVY 0:5a34a4387fb0 34 }
PixArtVY 0:5a34a4387fb0 35
PixArtVY 0:5a34a4387fb0 36 writeRegister(0x06, 0x80); //Software reset (i.e. set bit7 to 1)
PixArtVY 0:5a34a4387fb0 37 wait_ms(1); //Delay 1 ms for chip reset timing.
PixArtVY 0:5a34a4387fb0 38
PixArtVY 0:5a34a4387fb0 39 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 40 if(readRegister(0x00) != 0x31)
PixArtVY 0:5a34a4387fb0 41 {
PixArtVY 0:5a34a4387fb0 42 pc.printf("Communication protocol error! Terminating program.\n\r");
PixArtVY 0:5a34a4387fb0 43 return 0;
PixArtVY 0:5a34a4387fb0 44 }
PixArtVY 0:5a34a4387fb0 45
PixArtVY 0:5a34a4387fb0 46 load(initialize, initialize_size); //Load register settings from the "initialize" array (see registerArrays.h)
PixArtVY 0:5a34a4387fb0 47
PixArtVY 0:5a34a4387fb0 48 while(1)
PixArtVY 0:5a34a4387fb0 49 {
PixArtVY 0:5a34a4387fb0 50 //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 51
PixArtVY 0:5a34a4387fb0 52 if(readRegister(0x02) & 0x80)
PixArtVY 0:5a34a4387fb0 53 {
PixArtVY 0:5a34a4387fb0 54 grabData();
PixArtVY 0:5a34a4387fb0 55 printData();
PixArtVY 0:5a34a4387fb0 56 }
PixArtVY 0:5a34a4387fb0 57 }
PixArtVY 0:5a34a4387fb0 58 }