/Designs/Data_loggers/LuxmetrSD/SW/Arduino/luxmetr/luxmetr.pde
30,23 → 30,21
#define LIGHT_SENSE_VIS 0
#define LIGHT_SENSE_IR 1
 
#define LIGHT_TIMING_INTERNAL_16 0b000
#define LIGHT_TIMING_INTERNAL_12 0b001
#define LIGHT_TIMING_INTERNAL_8 0b010
#define LIGHT_TIMING_INTERNAL_4 0b011
#define LIGHT_TIMING_EXTERNAL_ADC 0b100
#define LIGHT_TIMING_EXTERNAL_TIMER 0b101
#define LIGHT_INTERNAL_16 0b00000000
#define LIGHT_INTERNAL_12 0b00000100
#define LIGHT_INTERNAL_8 0b00001000
#define LIGHT_INTERNAL_4 0b00001100
#define LIGHT_EXTERNAL_ADC 0b00010000
#define LIGHT_EXTERNAL_TIMER 0b00010100
 
//#define LIGHT_AUTORANGE 0
 
#define LIGHT_RANGE1 0b00
#define LIGHT_RANGE2 0b01
#define LIGHT_RANGE3 0b10
#define LIGHT_RANGE4 0b11
#define LIGHT_RANGE1 0b00000000
#define LIGHT_RANGE2 0b00000001
#define LIGHT_RANGE3 0b00000010
#define LIGHT_RANGE4 0b00000011
 
char filename[13];
int data = 0;
int light_sensor_setup;
 
void setup()
{
90,6 → 88,12
delay(500);
}
 
/*int light_sensor_write( unsigned int data, unsigned int address)
{
}
*/
 
 
int set_light_sensor(int en, int mode, int light, int res, int range)
{
int command=0;
110,7 → 114,6
Wire.beginTransmission(address);
Wire.send(0x00); // sends address (command register)
Wire.endTransmission(); // stop transmitting
// verify written command byte
Wire.beginTransmission(address);
Wire.requestFrom(address, 1);
120,16 → 123,17
return 4;
}
Wire.endTransmission(); // stop transmitting
light_sensor_setup=command;
Serial.println(command, BIN);
return 0;
}
 
float get_light_measurement()
{
int ret=0;
unsigned int ret=0;
unsigned int setting=0; // variable to storage readed settings
 
unsigned long int resolution; // parsed ADC bit resolution
unsigned int range; // parsed measurement range
 
// Connect to device and set register address
Wire.beginTransmission(address);
Wire.send(0x01); // sends address of LSB reagister
152,9 → 156,57
ret +=256 * Wire.receive();
Wire.endTransmission(); // stop transmitting
 
return (64000.0/pow(2.0,16)*ret);
 
// Connect to device and set register address
Wire.beginTransmission(address);
Wire.send(0x00); // sends address (command register)
Wire.endTransmission(); // stop transmitting
// get sensor setting
Wire.beginTransmission(address);
Wire.requestFrom(address, 1);
setting = Wire.receive();
Wire.endTransmission(); // stop transmitting
switch (setting & 0b00011100) // determine ADC resolution
{
case LIGHT_INTERNAL_16:
resolution=65536;
break;
case LIGHT_INTERNAL_12:
resolution=4096;
break;
case LIGHT_INTERNAL_8:
resolution=256;
break;
case LIGHT_INTERNAL_4:
resolution=16;
break;
}
 
switch (setting & 0b00000011) // determine measurement range
{
case LIGHT_RANGE1:
range=1000;
break;
case LIGHT_RANGE2:
range=4000;
break;
case LIGHT_RANGE3:
range=16000;
break;
case LIGHT_RANGE4:
range=64000;
break;
}
return ((float)range/resolution*ret); // calculate output value
}
 
void loop()
{
float luxVIS=0;
161,13 → 213,13
float luxIR=0;
float time;
 
set_light_sensor(LIGHT_ENABLE, LIGHT_ONETIME, LIGHT_SENSE_VIS, LIGHT_TIMING_INTERNAL_16, LIGHT_RANGE4); //setup sensor for visible measuring
set_light_sensor(LIGHT_ENABLE, LIGHT_ONETIME, LIGHT_SENSE_VIS, LIGHT_INTERNAL_16, LIGHT_RANGE2); //setup sensor for visible measuring
led_blink(); // Delay for measurement
luxVIS=get_light_measurement();
 
time=millis()/1000.0;
set_light_sensor(LIGHT_ENABLE, LIGHT_ONETIME, LIGHT_SENSE_IR, LIGHT_TIMING_INTERNAL_16, LIGHT_RANGE4); // setup sensor for infrared measuring
set_light_sensor(LIGHT_ENABLE, LIGHT_ONETIME, LIGHT_SENSE_IR, LIGHT_INTERNAL_16, LIGHT_RANGE2); // setup sensor for infrared measuring
led_blink(); // Delay for measurement
luxIR=get_light_measurement();