Valery Roman / Mbed 2 deprecated DISCO-F746NG_TSL3301

TSL3301

Dependencies:   BSP_DISCO_F746NG LCD_DISCO_F746NG TS_DISCO_F746NG mbed

Fork of DISCO-F746NG_TSL3301 by Yaroslav Krainyk

main.cpp@1:979d4820e32a, 2018-03-06 (annotated)

Committer:
codebreaker7
Date:
Tue Mar 06 13:04:48 2018 +0000
Revision:
1:979d4820e32a
Parent:
0:96ad87d71144
Child:
2:6d7063605e3a
Added setup call and made small corrections

Who changed what in which revision?

UserRevisionLine numberNew contents of line
codebreaker7 0:96ad87d71144 1 #include "mbed.h"
codebreaker7 0:96ad87d71144 2
codebreaker7 0:96ad87d71144 3 DigitalIn miso(D8);
codebreaker7 0:96ad87d71144 4 DigitalOut mosi(D7);
codebreaker7 0:96ad87d71144 5 DigitalOut clk(D6);
codebreaker7 0:96ad87d71144 6
codebreaker7 0:96ad87d71144 7 unsigned char lcam_buffer[102];
codebreaker7 0:96ad87d71144 8
codebreaker7 0:96ad87d71144 9 void lcam_pulse(void) {
codebreaker7 0:96ad87d71144 10 clk = 1;
codebreaker7 0:96ad87d71144 11 clk = 0;
codebreaker7 0:96ad87d71144 12 }
codebreaker7 0:96ad87d71144 13
codebreaker7 0:96ad87d71144 14 void lcam_pulse_clock(uint8_t times){
codebreaker7 0:96ad87d71144 15 for(unsigned char i = 0; i < times; i++)
codebreaker7 0:96ad87d71144 16 {
codebreaker7 0:96ad87d71144 17 lcam_pulse();
codebreaker7 0:96ad87d71144 18 }
codebreaker7 0:96ad87d71144 19 }
codebreaker7 0:96ad87d71144 20
codebreaker7 0:96ad87d71144 21 void lcam_send(uint8_t value){
codebreaker7 0:96ad87d71144 22 // Start bit
codebreaker7 0:96ad87d71144 23 mosi = 0;
codebreaker7 0:96ad87d71144 24 lcam_pulse();
codebreaker7 0:96ad87d71144 25 // Send 8 bits to camera
codebreaker7 0:96ad87d71144 26 for(unsigned char i = 0; i < 8; i++)
codebreaker7 0:96ad87d71144 27 {
codebreaker7 0:96ad87d71144 28 mosi = ((value >> i) & 1);
codebreaker7 0:96ad87d71144 29 lcam_pulse();
codebreaker7 0:96ad87d71144 30 }
codebreaker7 0:96ad87d71144 31 // Stop bit
codebreaker7 0:96ad87d71144 32 mosi = 1;
codebreaker7 0:96ad87d71144 33 lcam_pulse();
codebreaker7 0:96ad87d71144 34 }
codebreaker7 0:96ad87d71144 35
codebreaker7 0:96ad87d71144 36 void lcam_reset(void){
codebreaker7 0:96ad87d71144 37 wait_ms(1);
codebreaker7 0:96ad87d71144 38
codebreaker7 0:96ad87d71144 39 // 10 clock impulsions with SDIN held high to clear the receiver logic
codebreaker7 0:96ad87d71144 40 mosi = 1;
codebreaker7 0:96ad87d71144 41 lcam_pulse_clock(10);
codebreaker7 0:96ad87d71144 42 // 3 reset instructions to clear the control logic
codebreaker7 0:96ad87d71144 43 lcam_send(0x1b);
codebreaker7 0:96ad87d71144 44 lcam_send(0x1b);
codebreaker7 0:96ad87d71144 45 lcam_send(0x1b);
codebreaker7 0:96ad87d71144 46 // 30 clock impulsions to assure the state of SDOUT
codebreaker7 0:96ad87d71144 47 lcam_pulse_clock(30);
codebreaker7 0:96ad87d71144 48
codebreaker7 0:96ad87d71144 49 // register write mode
codebreaker7 0:96ad87d71144 50 lcam_send(0X5F);
codebreaker7 0:96ad87d71144 51 // Clear mode register (single chip, not sleep)
codebreaker7 0:96ad87d71144 52 lcam_send(0x00);
codebreaker7 0:96ad87d71144 53 }
codebreaker7 0:96ad87d71144 54
codebreaker7 0:96ad87d71144 55 void lcam_setup(void){
codebreaker7 0:96ad87d71144 56 lcam_reset();
codebreaker7 0:96ad87d71144 57
codebreaker7 0:96ad87d71144 58 // set inputs and outputs
codebreaker7 0:96ad87d71144 59 //clk = 1;
codebreaker7 0:96ad87d71144 60 //pin_mode(LCAM_PORT, LCAM_SDIN, 1);
codebreaker7 0:96ad87d71144 61 //pin_mode(LCAM_PORT, LCAM_SDOUT, 0);
codebreaker7 0:96ad87d71144 62 // make sure the clock is cleared
codebreaker7 0:96ad87d71144 63 clk = 0;
codebreaker7 0:96ad87d71144 64
codebreaker7 0:96ad87d71144 65 // Left offset
codebreaker7 0:96ad87d71144 66 lcam_send(0x40);
codebreaker7 0:96ad87d71144 67 lcam_send(0);
codebreaker7 0:96ad87d71144 68 // Left gain
codebreaker7 0:96ad87d71144 69 lcam_send(0x41);
codebreaker7 0:96ad87d71144 70 lcam_send(15);
codebreaker7 0:96ad87d71144 71 // Middle offset
codebreaker7 0:96ad87d71144 72 lcam_send(0x42);
codebreaker7 0:96ad87d71144 73 lcam_send(0);
codebreaker7 0:96ad87d71144 74 // Middle gain
codebreaker7 0:96ad87d71144 75 lcam_send(0x43);
codebreaker7 0:96ad87d71144 76 lcam_send(15);
codebreaker7 0:96ad87d71144 77 // Right offset
codebreaker7 0:96ad87d71144 78 lcam_send(0x44);
codebreaker7 0:96ad87d71144 79 lcam_send(0);
codebreaker7 0:96ad87d71144 80 // Right gain
codebreaker7 0:96ad87d71144 81 lcam_send(0x45);
codebreaker7 0:96ad87d71144 82 lcam_send(15);
codebreaker7 0:96ad87d71144 83 }
codebreaker7 0:96ad87d71144 84
codebreaker7 0:96ad87d71144 85 void lcam_startintegration(void){
codebreaker7 0:96ad87d71144 86 // Send start integration command
codebreaker7 0:96ad87d71144 87 lcam_send(0x08);
codebreaker7 0:96ad87d71144 88 // delayed until the pixel reset cycle has been completed (22-clock delay)
codebreaker7 0:96ad87d71144 89 lcam_pulse_clock(22);
codebreaker7 0:96ad87d71144 90 }
codebreaker7 0:96ad87d71144 91
codebreaker7 0:96ad87d71144 92 void lcam_endintegration(void){
codebreaker7 0:96ad87d71144 93 // Sample int command
codebreaker7 0:96ad87d71144 94 lcam_send(0x10);
codebreaker7 0:96ad87d71144 95 // pixel reset sequence is initiated, requires 22 clocks
codebreaker7 0:96ad87d71144 96 lcam_pulse_clock(22);
codebreaker7 0:96ad87d71144 97 }
codebreaker7 0:96ad87d71144 98
codebreaker7 0:96ad87d71144 99 void lcam_integrate(unsigned int microseconds){
codebreaker7 0:96ad87d71144 100 lcam_startintegration();
codebreaker7 0:96ad87d71144 101 wait_us(microseconds);
codebreaker7 0:96ad87d71144 102 lcam_endintegration();
codebreaker7 0:96ad87d71144 103 }
codebreaker7 0:96ad87d71144 104
codebreaker7 0:96ad87d71144 105 unsigned char* lcam_getdata(void){
codebreaker7 0:96ad87d71144 106 return lcam_buffer;
codebreaker7 0:96ad87d71144 107 }
codebreaker7 0:96ad87d71144 108
codebreaker7 0:96ad87d71144 109 void lcam_read(void){
codebreaker7 0:96ad87d71144 110 unsigned char i, pixel_bit, pixel;
codebreaker7 0:96ad87d71144 111 // Read pixel command
codebreaker7 0:96ad87d71144 112 lcam_send(0x02);
codebreaker7 0:96ad87d71144 113 // 44-clock cycle delay until the first pixel data is output
codebreaker7 0:96ad87d71144 114 lcam_pulse_clock(44);
codebreaker7 0:96ad87d71144 115 // Read the 102 pixels from the camera
codebreaker7 0:96ad87d71144 116 for(i = 0; i < 102; i++)
codebreaker7 0:96ad87d71144 117 {
codebreaker7 0:96ad87d71144 118 pixel = 0;
codebreaker7 0:96ad87d71144 119 // pulse the pixel start bit (SDOUT = 0)
codebreaker7 0:96ad87d71144 120 lcam_pulse();
codebreaker7 0:96ad87d71144 121 // read a byte, bit by bit
codebreaker7 0:96ad87d71144 122 for(pixel_bit = 0; pixel_bit < 8; pixel_bit++)
codebreaker7 0:96ad87d71144 123 {
codebreaker7 0:96ad87d71144 124 clk = 1;
codebreaker7 0:96ad87d71144 125 // read pin while clock is at 1
codebreaker7 0:96ad87d71144 126 pixel |= (((miso) & 1) << pixel_bit);
codebreaker7 0:96ad87d71144 127 clk = 0;
codebreaker7 0:96ad87d71144 128 }
codebreaker7 0:96ad87d71144 129 // store byte to buffer
codebreaker7 0:96ad87d71144 130 lcam_buffer[i] = pixel;
codebreaker7 0:96ad87d71144 131 // pulse the pixel stop bit (SDOUT = 1)
codebreaker7 0:96ad87d71144 132 lcam_pulse();
codebreaker7 0:96ad87d71144 133 }
codebreaker7 0:96ad87d71144 134 }
codebreaker7 0:96ad87d71144 135
codebreaker7 0:96ad87d71144 136 int main() {
codebreaker7 1:979d4820e32a 137 lcam_setup();
codebreaker7 0:96ad87d71144 138 while(1) {
codebreaker7 0:96ad87d71144 139
codebreaker7 0:96ad87d71144 140 }
codebreaker7 0:96ad87d71144 141 }