Problem with comparison.
/Modules/Sensors/ISL2902001A/SW/Arduino/i2c_light/i2c_light.pde
0,0 → 1,122
// I2C Light Sensor
 
#include <Wire.h>
 
#define address 0x44 // A0 = L
#define SENSE_VIS 0
#define SENSE_IR 1
 
 
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
}
 
int data = 0;
 
void led_blink()
{
digitalWrite(3, HIGH); // set the LED on
delay(500);
digitalWrite(3, LOW); // set the LED off
delay(500);
}
 
 
int set_light_sensor(int mode)
{
int command;
switch (mode)
{
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;
}
 
// Setup device
Wire.beginTransmission(address);
Wire.send(0x00); // sends address
Wire.send(command); // setup (eye light sensing; one time measurement; measurement range 1)
Wire.endTransmission(); // stop transmitting
// Connect to device and set register address
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);
if (command != Wire.receive())
{
return 4;
Serial.print(data, BIN);
}
Wire.endTransmission(); // stop transmitting
 
}
 
int get_light_measurement()
{
int lux=0;
 
// Connect to device and set register address
Wire.beginTransmission(address);
Wire.send(0x01); // sends address of LSB reagister
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
lux=data;
// Connect to device and set register address
Wire.beginTransmission(address);
Wire.send(0x02); // sends address of MSB register
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
 
lux+=data*256;
return lux;
}
 
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((unsigned)get_light_measurement(), DEC);
 
set_light_sensor(SENSE_IR); // setup sensor for infrared measuring
led_blink(); // Delay for measurement
Serial.print("luxIR=");
Serial.println((unsigned)get_light_measurement(), DEC); // data print
}