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/* I2C Light Sensor |
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/* I2C Light Sensor |
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|
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|
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The circuit: |
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The circuit: |
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* analog sensors on analog ins PC0, PC1, and PC2 |
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* analog sensors on analog ins PC0, PC1, and PC2 |
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* SD card attached to SPI bus as follows: |
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* SD card attached to SPI bus as follows: |
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** MOSI/CMD - PB3 |
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** MOSI/CMD - PB3 |
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** MISO/DAT0 - PB4 |
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** MISO/DAT0 - PB4 |
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** CLK - PB5 |
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** CLK - PB5 |
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** CS/CD/DAT3 - PD4 (4) |
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** CS/CD/DAT3 - PD4 (4) |
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|
10 |
|
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I2C pins PC4, PC5 |
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I2C pins PC4, PC5 |
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|
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|
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*/ |
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*/ |
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|
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|
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#include <Wire.h> |
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#include <Wire.h> |
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#include <math.h> |
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#include <math.h> |
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#include <stdlib.h> |
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#include <stdlib.h> |
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#include <SD.h> |
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#include <SD.h> |
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|
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|
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#define chipSelect 4 |
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#define chipSelect 4 |
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|
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|
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#define address 0x44 // A0 = L |
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#define address 0x44 // A0 = L |
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|
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|
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#define LIGHT_ENABLE 1 |
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#define LIGHT_ENABLE 1 |
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#define LIGHT_DISABLE 0 |
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#define LIGHT_DISABLE 0 |
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|
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|
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#define LIGHT_ONETIME 0 |
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#define LIGHT_ONETIME 0 |
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#define LIGHT_CONTINUOUS 1 |
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#define LIGHT_CONTINUOUS 1 |
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|
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|
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#define LIGHT_SENSE_VIS 0 |
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#define LIGHT_SENSE_VIS 0 |
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#define LIGHT_SENSE_IR 1 |
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#define LIGHT_SENSE_IR 1 |
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|
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|
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#define LIGHT_TIMING_INTERNAL_16 0b000 |
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#define LIGHT_INTERNAL_16 0b00000000 |
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#define LIGHT_TIMING_INTERNAL_12 0b001 |
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#define LIGHT_INTERNAL_12 0b00000100 |
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#define LIGHT_TIMING_INTERNAL_8 0b010 |
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#define LIGHT_INTERNAL_8 0b00001000 |
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#define LIGHT_TIMING_INTERNAL_4 0b011 |
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#define LIGHT_INTERNAL_4 0b00001100 |
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#define LIGHT_TIMING_EXTERNAL_ADC 0b100 |
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#define LIGHT_EXTERNAL_ADC 0b00010000 |
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#define LIGHT_TIMING_EXTERNAL_TIMER 0b101 |
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#define LIGHT_EXTERNAL_TIMER 0b00010100 |
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|
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|
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//#define LIGHT_AUTORANGE 0 |
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//#define LIGHT_AUTORANGE 0 |
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|
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|
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#define LIGHT_RANGE1 0b00 |
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#define LIGHT_RANGE1 0b00000000 |
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#define LIGHT_RANGE2 0b01 |
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#define LIGHT_RANGE2 0b00000001 |
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#define LIGHT_RANGE3 0b10 |
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#define LIGHT_RANGE3 0b00000010 |
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#define LIGHT_RANGE4 0b11 |
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#define LIGHT_RANGE4 0b00000011 |
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|
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|
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char filename[13]; |
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char filename[13]; |
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int data = 0; |
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|
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int light_sensor_setup; |
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|
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|
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|
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void setup() |
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void setup() |
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{ |
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{ |
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int count=0; |
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int count=0; |
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|
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|
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Wire.begin(); // join i2c bus (address optional for master) |
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Wire.begin(); // join i2c bus (address optional for master) |
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|
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|
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pinMode(3, OUTPUT); // LED pro blikani, aby bylo videt, ze to neco dela |
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pinMode(3, OUTPUT); // LED pro blikani, aby bylo videt, ze to neco dela |
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pinMode(5, OUTPUT); // LED pro blikani, aby bylo videt, ze to neco dela |
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pinMode(5, OUTPUT); // LED pro blikani, aby bylo videt, ze to neco dela |
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Serial.begin(9600); // Zmerena intenzita osvetleni se bude vypisovat na seriovou linku |
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Serial.begin(9600); // Zmerena intenzita osvetleni se bude vypisovat na seriovou linku |
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|
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|
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Serial.print("Initializing SD card..."); |
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Serial.print("Initializing SD card..."); |
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// make sure that the default chip select pin is set to |
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// make sure that the default chip select pin is set to |
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// output, even if you don't use it: |
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// output, even if you don't use it: |
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pinMode(10, OUTPUT); |
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pinMode(10, OUTPUT); |
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|
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|
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// see if the card is present and can be initialized: |
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// see if the card is present and can be initialized: |
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if (!SD.begin(chipSelect)) { |
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if (!SD.begin(chipSelect)) { |
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Serial.println("Card failed, or not present"); |
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Serial.println("Card failed, or not present"); |
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// don't do anything more: |
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// don't do anything more: |
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return; |
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return; |
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} |
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} |
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Serial.println("card initialized."); |
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Serial.println("card initialized."); |
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Serial.print("searching for files..."); |
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Serial.print("searching for files..."); |
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|
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|
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do |
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do |
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{ |
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{ |
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sprintf(filename,"Lux%d.txt",count); |
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sprintf(filename,"Lux%d.txt",count); |
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count++; |
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count++; |
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} |
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} |
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while(SD.exists(filename)); |
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while(SD.exists(filename)); |
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Serial.print("Using "); |
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Serial.print("Using "); |
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Serial.println(filename); |
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Serial.println(filename); |
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} |
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} |
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|
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|
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void led_blink() |
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void led_blink() |
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{ |
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{ |
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digitalWrite(3, HIGH); // set the LED on |
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digitalWrite(3, HIGH); // set the LED on |
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delay(500); |
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delay(500); |
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digitalWrite(3, LOW); // set the LED off |
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digitalWrite(3, LOW); // set the LED off |
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delay(500); |
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delay(500); |
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} |
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} |
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|
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|
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|
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/*int light_sensor_write( unsigned int data, unsigned int address) |
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|
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{ |
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|
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} |
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|
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*/ |
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|
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|
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|
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|
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int set_light_sensor(int en, int mode, int light, int res, int range) |
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int set_light_sensor(int en, int mode, int light, int res, int range) |
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{ |
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{ |
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int command=0; |
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int command=0; |
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|
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|
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command = (command & 0b01111111) | (en << 7); |
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command = (command & 0b01111111) | (en << 7); |
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command = (command & 0b10111111) | (mode << 6); |
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command = (command & 0b10111111) | (mode << 6); |
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command = (command & 0b11011111) | (light << 5); |
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command = (command & 0b11011111) | (light << 5); |
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command = (command & 0b11100011) | (res << 2); |
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command = (command & 0b11100011) | (res << 2); |
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command = (command & 0b11111100) | (range); |
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command = (command & 0b11111100) | (range); |
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|
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|
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// Setup device |
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// Setup device |
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Wire.beginTransmission(address); |
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Wire.beginTransmission(address); |
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Wire.send(0x00); // sends address |
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Wire.send(0x00); // sends address |
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Wire.send(command); // setup (eye light sensing; one time measurement; measurement range 1) |
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Wire.send(command); // setup (eye light sensing; one time measurement; measurement range 1) |
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Wire.endTransmission(); // stop transmitting |
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Wire.endTransmission(); // stop transmitting |
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|
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|
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// Connect to device and set register address |
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// Connect to device and set register address |
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Wire.beginTransmission(address); |
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Wire.beginTransmission(address); |
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Wire.send(0x00); // sends address (command register) |
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Wire.send(0x00); // sends address (command register) |
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Wire.endTransmission(); // stop transmitting |
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Wire.endTransmission(); // stop transmitting |
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|
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|
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// verify written command byte |
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// verify written command byte |
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Wire.beginTransmission(address); |
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Wire.beginTransmission(address); |
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Wire.requestFrom(address, 1); |
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Wire.requestFrom(address, 1); |
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if (command != Wire.receive()) |
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if (command != Wire.receive()) |
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{ |
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{ |
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Serial.println("Error in sensor setting"); |
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Serial.println("Error in sensor setting"); |
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return 4; |
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return 4; |
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} |
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} |
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Wire.endTransmission(); // stop transmitting |
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Wire.endTransmission(); // stop transmitting |
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light_sensor_setup=command; |
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|
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Serial.println(command, BIN); |
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|
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|
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|
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return 0; |
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return 0; |
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} |
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} |
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|
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|
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float get_light_measurement() |
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float get_light_measurement() |
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{ |
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{ |
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int ret=0; |
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unsigned int ret=0; |
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|
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unsigned int setting=0; // variable to storage readed settings |
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|
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|
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|
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unsigned long int resolution; // parsed ADC bit resolution |
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|
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unsigned int range; // parsed measurement range |
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|
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|
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// Connect to device and set register address |
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// Connect to device and set register address |
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Wire.beginTransmission(address); |
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Wire.beginTransmission(address); |
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Wire.send(0x01); // sends address of LSB reagister |
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Wire.send(0x01); // sends address of LSB reagister |
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Wire.endTransmission(); // stop transmitting |
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Wire.endTransmission(); // stop transmitting |
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|
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|
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// Connect to device and request first byte |
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// Connect to device and request first byte |
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Wire.beginTransmission(address); |
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Wire.beginTransmission(address); |
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Wire.requestFrom(address, 1); |
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Wire.requestFrom(address, 1); |
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ret = Wire.receive(); |
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ret = Wire.receive(); |
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Wire.endTransmission(); // stop transmitting |
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Wire.endTransmission(); // stop transmitting |
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|
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|
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// Connect to device and set register address |
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// Connect to device and set register address |
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Wire.beginTransmission(address); |
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Wire.beginTransmission(address); |
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Wire.send(0x02); // sends address of MSB register |
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Wire.send(0x02); // sends address of MSB register |
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Wire.endTransmission(); // stop transmitting |
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Wire.endTransmission(); // stop transmitting |
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|
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|
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// Connect to device and request second byte |
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// Connect to device and request second byte |
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Wire.beginTransmission(address); |
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Wire.beginTransmission(address); |
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Wire.requestFrom(address, 1); |
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Wire.requestFrom(address, 1); |
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ret +=256 * Wire.receive(); |
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ret +=256 * Wire.receive(); |
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Wire.endTransmission(); // stop transmitting |
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Wire.endTransmission(); // stop transmitting |
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|
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|
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|
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|
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|
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// Connect to device and set register address |
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|
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Wire.beginTransmission(address); |
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|
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Wire.send(0x00); // sends address (command register) |
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|
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Wire.endTransmission(); // stop transmitting |
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|
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// get sensor setting |
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|
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Wire.beginTransmission(address); |
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|
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Wire.requestFrom(address, 1); |
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return (64000.0/pow(2.0,16)*ret); |
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setting = Wire.receive(); |
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|
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Wire.endTransmission(); // stop transmitting |
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|
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|
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|
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switch (setting & 0b00011100) // determine ADC resolution |
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|
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{ |
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|
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case LIGHT_INTERNAL_16: |
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|
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resolution=65536; |
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|
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break; |
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|
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|
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|
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case LIGHT_INTERNAL_12: |
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|
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resolution=4096; |
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|
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break; |
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|
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|
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|
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case LIGHT_INTERNAL_8: |
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|
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resolution=256; |
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|
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break; |
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|
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|
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|
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case LIGHT_INTERNAL_4: |
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|
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resolution=16; |
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|
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break; |
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|
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} |
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|
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|
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|
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switch (setting & 0b00000011) // determine measurement range |
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|
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{ |
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|
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case LIGHT_RANGE1: |
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|
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range=1000; |
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|
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break; |
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|
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|
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|
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case LIGHT_RANGE2: |
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|
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range=4000; |
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|
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break; |
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|
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|
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|
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case LIGHT_RANGE3: |
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|
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range=16000; |
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|
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break; |
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|
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|
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|
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case LIGHT_RANGE4: |
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|
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range=64000; |
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|
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break; |
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|
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} |
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|
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return ((float)range/resolution*ret); // calculate output value |
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} |
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} |
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|
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|
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void loop() |
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void loop() |
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{ |
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{ |
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float luxVIS=0; |
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float luxVIS=0; |
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float luxIR=0; |
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float luxIR=0; |
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float time; |
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float time; |
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|
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|
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set_light_sensor(LIGHT_ENABLE, LIGHT_ONETIME, LIGHT_SENSE_VIS, LIGHT_TIMING_INTERNAL_16, LIGHT_RANGE4); //setup sensor for visible measuring |
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set_light_sensor(LIGHT_ENABLE, LIGHT_ONETIME, LIGHT_SENSE_VIS, LIGHT_INTERNAL_16, LIGHT_RANGE2); //setup sensor for visible measuring |
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led_blink(); // Delay for measurement |
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led_blink(); // Delay for measurement |
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luxVIS=get_light_measurement(); |
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luxVIS=get_light_measurement(); |
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|
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|
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time=millis()/1000.0; |
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time=millis()/1000.0; |
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|
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|
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set_light_sensor(LIGHT_ENABLE, LIGHT_ONETIME, LIGHT_SENSE_IR, LIGHT_TIMING_INTERNAL_16, LIGHT_RANGE4); // setup sensor for infrared measuring |
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set_light_sensor(LIGHT_ENABLE, LIGHT_ONETIME, LIGHT_SENSE_IR, LIGHT_INTERNAL_16, LIGHT_RANGE2); // setup sensor for infrared measuring |
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led_blink(); // Delay for measurement |
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led_blink(); // Delay for measurement |
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luxIR=get_light_measurement(); |
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luxIR=get_light_measurement(); |
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|
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|
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// open the file. note that only one file can be open at a time, |
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// open the file. note that only one file can be open at a time, |
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// so you have to close this one before opening another. |
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// so you have to close this one before opening another. |
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File dataFile = SD.open(filename, FILE_WRITE); |
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File dataFile = SD.open(filename, FILE_WRITE); |
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|
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|
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// if the file is available, write to it: |
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// if the file is available, write to it: |
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if (dataFile) { |
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if (dataFile) { |
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dataFile.print("$LUX0.1 "); |
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dataFile.print("$LUX0.1 "); |
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dataFile.print(time,3); |
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dataFile.print(time,3); |
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dataFile.print(" "); |
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dataFile.print(" "); |
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dataFile.print(luxVIS,3); |
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dataFile.print(luxVIS,3); |
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dataFile.print(" "); |
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dataFile.print(" "); |
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dataFile.println(luxIR,3); |
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dataFile.println(luxIR,3); |
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dataFile.close(); |
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dataFile.close(); |
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|
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|
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// print to the serial port too: |
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// print to the serial port too: |
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Serial.print("$LUX0.1 "); |
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Serial.print("$LUX0.1 "); |
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Serial.print(time,3); |
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Serial.print(time,3); |
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Serial.print(" "); |
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Serial.print(" "); |
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Serial.print(luxVIS,3); |
244 |
Serial.print(luxVIS,3); |
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Serial.print(" "); |
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Serial.print(" "); |
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Serial.println(luxIR,3); |
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Serial.println(luxIR,3); |
195 |
} |
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} |
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// if the file isn't open, pop up an error: |
248 |
// if the file isn't open, pop up an error: |
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else { |
249 |
else { |
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Serial.print("error opening "); |
250 |
Serial.print("error opening "); |
199 |
Serial.println(filename); |
251 |
Serial.println(filename); |
200 |
} |
252 |
} |
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} |
253 |
} |
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|
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|