/Modules/Sensors/ISL2902001A/SW/Wiring/i2c_light/i2c_light.pde
1,12 → 1,24
// I2C Light Sensor
 
#include <Wire.h>
#include <math.h>
 
#define address 0x44 // A0 = L
#define SENSE_VIS 0
#define SENSE_IR 1
 
#define LIGHT_AUTORANGE 0
#define LIGHT_RANGE1 1
#define LIGHT_RANGE2 2
#define LIGHT_RANGE3 3
#define LIGHT_RANGE4 4
 
 
void setup()
{
Wire.begin(); // join i2c bus (address optional for master)
// I2C pins PD4, PD5
//
pinMode(3, OUTPUT); // LED pro blikani, aby bylo videt, ze to neco dela
pinMode(5, OUTPUT); // LED pro blikani, aby bylo videt, ze to neco dela
Serial.begin(9600); // Zmerena intenzita osvetleni se bude vypisovat na seriovou linku
13,127 → 25,104
}
 
int data = 0;
int light_sensor_setup;
 
void loop()
void led_blink()
{
int lux=0;
digitalWrite(3, HIGH); // set the LED on
delay(500);
digitalWrite(3, LOW); // set the LED off
delay(500);
}
 
Serial.print("lux=");
 
// Setup device
digitalWrite(5, HIGH);
 
Wire.beginTransmission(address);
Wire.send(0x00); // sends address
Wire.send(0b11000000); // setup (eye light sensing; one time measurement; measurement range 1)
Wire.endTransmission(); // stop transmitting
 
// Delay for measurement
int set_light_sensor(int mode)
{
int command;
switch (mode)
{
long n;
for(n=0;n<66000;n++)
{
digitalWrite(5, LOW); // set the LED off
// delay(500);
digitalWrite(5, HIGH); // set the LED on
delayMicroseconds(100);
// delay(500);
case SENSE_VIS:
{
command=0b11000000; // setup (eye light sensing; one time measurement; measurement range 1)
break;
}
 
case SENSE_IR:
{
command=0b11100000; // setup (eye light sensing; measurement range 2 [4000 lx])
break;
}
default:
return 3;
}
 
 
// Connect to device and set register address
// Setup device
Wire.beginTransmission(address);
Wire.send(0x00); // sends address
Wire.write(0x00); // sends address
Wire.write(command); // setup (eye light sensing; one time measurement; measurement range 1)
Wire.endTransmission(); // stop transmitting
// Connect to device and request one byte
Wire.beginTransmission(address);
Wire.requestFrom(address, 1);
data = Wire.receive();
Wire.endTransmission(); // stop transmitting
// Serial.print(data, HEX);
 
// Serial.print(" LSB=");
// Connect to device and set register address
// Connect to device and set register address
Wire.beginTransmission(address);
Wire.send(0x01); // sends address
Wire.write(0x00); // sends address (command register)
Wire.endTransmission(); // stop transmitting
// Connect to device and request one byte
Wire.beginTransmission(address);
// verify written command byte
Wire.beginTransmission(address);
Wire.requestFrom(address, 1);
data = Wire.receive();
if (command != Wire.read())
{
return 4;
Serial.print(data, BIN);
}
Wire.endTransmission(); // stop transmitting
// Serial.print(data, HEX);
lux=data;
light_sensor_setup=command;
}
 
// Serial.print(" MSB=");
// Connect to device and set register address
Wire.beginTransmission(address);
Wire.send(0x02); // sends address
Wire.endTransmission(); // stop transmitting
// Connect to device and request one byte
Wire.beginTransmission(address);
Wire.requestFrom(address, 1);
data = Wire.receive();
Wire.endTransmission(); // stop transmitting
// Serial.print(data, HEX);
lux+=data*256;
float get_light_measurement()
{
int ret=0;
 
/*
Serial.print((unsigned)lux, DEC);
Serial.print(" luxIR=");
// Setup device
// Connect to device and set register address
Wire.beginTransmission(address);
Wire.send(0x00); // sends address
Wire.send(0b11100000); // setup (eye light sensing; measurement range 2 [4000 lx])
Wire.write(0x01); // sends address of LSB reagister
Wire.endTransmission(); // stop transmitting
// Delay for measurement
digitalWrite(3, HIGH); // set the LED on
delay(500);
digitalWrite(3, LOW); // set the LED off
delay(500);
// Connect to device and set register address
Wire.beginTransmission(address);
Wire.send(0x00); // sends address
Wire.endTransmission(); // stop transmitting
// Connect to device and request one byte
Wire.beginTransmission(address);
Wire.requestFrom(address, 1);
data = Wire.receive();
ret = Wire.read();
Wire.endTransmission(); // stop transmitting
// Serial.print(data, HEX);
// Serial.print(" LSB=");
// Connect to device and set register address
Wire.beginTransmission(address);
Wire.send(0x01); // sends address
Wire.endTransmission(); // stop transmitting
// Connect to device and request one byte
Wire.beginTransmission(address);
Wire.requestFrom(address, 1);
data = Wire.receive();
Wire.write(0x02); // sends address of MSB register
Wire.endTransmission(); // stop transmitting
// Serial.print(data, HEX);
lux=data;
// Serial.print(" MSB=");
// Connect to device and set register address
Wire.beginTransmission(address);
Wire.send(0x02); // sends address
Wire.endTransmission(); // stop transmitting
// Connect to device and request one byte
Wire.beginTransmission(address);
Wire.requestFrom(address, 1);
data = Wire.receive();
ret +=256 * Wire.read();
Wire.endTransmission(); // stop transmitting
// Serial.print(data, HEX);
lux+=data*256;
*/
Serial.println((unsigned)lux, DEC);
 
return (1000.0/pow(2.0,16)*ret);
}
 
void loop()
{
int lux=0;
 
set_light_sensor(SENSE_VIS); //setup sensor for visible measuring
led_blink(); // Delay for measurement
Serial.print("lux=");
Serial.println(get_light_measurement(),2);
 
set_light_sensor(SENSE_IR); // setup sensor for infrared measuring
led_blink(); // Delay for measurement
Serial.print("luxIR=");
Serial.println(get_light_measurement(), 2); // data print
}