Problem with comparison.
/Modules/Sensors/ISL2902001A/SW/Arduino/i2c_light/i2c_light.pde |
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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 |
} |