107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
// Code from the following github repo: https://github.com/ControlEverythingCommunity/TSL2561/blob/master/C/TSL2561.c
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#include "include/TSL2561.h"
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void printSpectrum(int file)
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{
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// Read 4 bytes of data from register(0x0C | 0x80)
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// ch0 lsb, ch0 msb, ch1 lsb, ch1 msb
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char reg[1] = {0x0C | 0x80};
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write(file, reg, 1);
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char data[4] = {0};
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if(read(file, data, 4) != 4)
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{
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printf("Erorr : Input/output Erorr \n");
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}
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else
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{
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// Convert the data
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float ch0 = (data[1] * 256 + data[0]); //Full Spectrum(IR + Visible)
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float ch1 = (data[3] * 256 + data[2]); //Infrared Value
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// Output data to screen
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printf("Full Spectrum(IR + Visible) : %.1f lux \n", ch0);
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printf("Infrared Value : %.1f lux \n", ch1);
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printf("Visible Value : %.1f lux \n", (ch0 - ch1));
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}
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}
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float getFullSpectrum(int file)
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{
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// Read 4 bytes of data from register(0x0C | 0x80)
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// ch0 lsb, ch0 msb, ch1 lsb, ch1 msb
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char reg[1] = {0x0C | 0x80};
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write(file, reg, 1);
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char data[4] = {0};
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if(read(file, data, 4) != 4)
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{
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printf("Erorr : Input/output Erorr \n");
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}
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else
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{
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// Convert the data
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float ch0 = (data[1] * 256 + data[0]); //Full Spectrum(IR + Visible)
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return ch0;
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}
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}
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float getInfraredLight(int file)
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{
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// Read 4 bytes of data from register(0x0C | 0x80)
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// ch0 lsb, ch0 msb, ch1 lsb, ch1 msb
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char reg[1] = {0x0C | 0x80};
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write(file, reg, 1);
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char data[4] = {0};
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if(read(file, data, 4) != 4)
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{
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printf("Erorr : Input/output Erorr \n");
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}
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else
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{
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// Convert the data
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float ch1 = (data[3] * 256 + data[2]); //Infrared Value
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return ch1;
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}
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}
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int init_TSL2561(char *bus)
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{
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int file;
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if((file = open(bus, O_RDWR)) < 0)
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{
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printf("Failed to open the bus. \n");
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exit(1);
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}
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// Get I2C device, TSL2561 I2C address is 0x39(57)
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ioctl(file, I2C_SLAVE, 0x39);
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// Select control register(0x00 | 0x80)
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// Power ON mode(0x03)
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char config[2] = {0};
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config[0] = 0x00 | 0x80;
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config[1] = 0x03;
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write(file, config, 2);
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// Select timing register(0x01 | 0x80)
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// Nominal integration time = 402ms(0x02)
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config[0] = 0x01 | 0x80;
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config[1] = 0x02;
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write(file, config, 2);
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return file;
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}
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void TSL2561()
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{
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int fe = 1;
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int file;
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file = init_TSL2561(bus);
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while(1)
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{
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sleep(1/fe);
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float a = getFullSpectrum(file);
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float b = getInfraredLight(file);
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printf("%.1f\n",a);
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printf("%.1f\n",b);
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printSpectrum(file);
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}
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}
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void main(){
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TSL2561();
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} |