| 0,0 → 1,128 |
|---|
| // 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 PC4 - , PC5 - |
| // |
| 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; |
| int light_sensor_setup; |
| |
| 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.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 set register address |
| Wire.beginTransmission(address); |
| Wire.write(0x00); // sends address (command register) |
| Wire.endTransmission(); // stop transmitting |
| |
| // verify written command byte |
| Wire.beginTransmission(address); |
| Wire.requestFrom(address, 1); |
| if (command != Wire.read()) |
| { |
| return 4; |
| Serial.print(data, BIN); |
| } |
| Wire.endTransmission(); // stop transmitting |
| light_sensor_setup=command; |
| } |
| |
| float get_light_measurement() |
| { |
| int ret=0; |
| |
| // Connect to device and set register address |
| Wire.beginTransmission(address); |
| Wire.write(0x01); // sends address of LSB reagister |
| Wire.endTransmission(); // stop transmitting |
| |
| // Connect to device and request one byte |
| Wire.beginTransmission(address); |
| Wire.requestFrom(address, 1); |
| ret = Wire.read(); |
| Wire.endTransmission(); // stop transmitting |
| |
| // Connect to device and set register address |
| Wire.beginTransmission(address); |
| Wire.write(0x02); // sends address of MSB register |
| Wire.endTransmission(); // stop transmitting |
| |
| // Connect to device and request one byte |
| Wire.beginTransmission(address); |
| Wire.requestFrom(address, 1); |
| ret +=256 * Wire.read(); |
| Wire.endTransmission(); // stop transmitting |
| |
| 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 |
| } |
| |