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@zoellner

zoellner/grideye.ino

Last active September 23, 2017 12:22
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  1. zoellner revised this gist May 15, 2013. 1 changed file with 11 additions and 3 deletions.
    14 changes: 11 additions & 3 deletions grideye.ino
    View file
    Original file line number Diff line number Diff line change
    @@ -11,7 +11,8 @@ byte pixelTempL;
    byte pixelTempH;
    int ledNum = 1;
    char addr = 0x68;
    int celsius;
    float celsius;
    unsigned long time;

    void setup() {
    Wire.begin();
    @@ -38,12 +39,17 @@ void loop()
    Wire.requestFrom(addr,1);
    byte lowerLevelTherm = Wire.read();
    int temperatureTherm = ((lowerLevelTherm << 8) | upperLevelTherm);
    int celsiusTherm = temperatureTherm*0.0625;
    float celsiusTherm = temperatureTherm*0.0625;

    //First two data registers for the pixel temp data are 0x80 and 0x81
    pixelTempL=0x80;
    pixelTempH=0x81;
    //Get Temperature Data for each pixel in the 8x8 array. Will loop 64 times.
    time = millis();
    Serial.print(time);
    Serial.print(" ");
    Serial.print(celsiusTherm,4);
    Serial.print(" ");
    for(int pixel = 0; pixel <= 63; pixel++){
    //Get lower level pixel temp byte
    Wire.beginTransmission(addr);
    @@ -79,7 +85,10 @@ void loop()
    //Go to next pixel by advancing both the low and high bit two register values
    pixelTempL=pixelTempL+2;
    pixelTempH=pixelTempH+2;
    Serial.print(celsius,2);
    Serial.print(" ");
    }
    Serial.println(" ");

    //Transfer color contents of LED array for display
    digitalWrite(SLAVESELECT, LOW);
    @@ -90,4 +99,3 @@ void loop()
    delayMicroseconds(500);
    digitalWrite(SLAVESELECT, HIGH);
    } //end loop

  2. zoellner created this gist May 15, 2013.
    93 changes: 93 additions & 0 deletions grideye.ino
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,93 @@
    #include <Wire.h>
    #include <SPI.h>
    //define our colors for LED Array
    #define GREEN 0x01
    #define RED 0x02
    #define ORANGE 0x03
    //define the SPI pins for the LED Array
    #define SLAVESELECT 10//ss
    char ledArray [64];
    byte pixelTempL;
    byte pixelTempH;
    int ledNum = 1;
    char addr = 0x68;
    int celsius;

    void setup() {
    Wire.begin();
    Serial.begin(115200);

    SPI.begin(); // initialize the SPI library
    SPI.setClockDivider(SPI_CLOCK_DIV128); // set clock to 125kHz for 16MHz board

    //Make sure the RG matrix is deactivated
    digitalWrite(SLAVESELECT,HIGH);
    }

    void loop()
    {
    //Thermistor Register - Optional
    Wire.beginTransmission(addr);
    Wire.write(0x0E);
    Wire.endTransmission();
    Wire.requestFrom(addr,1);
    byte upperLevelTherm = Wire.read();
    Wire.beginTransmission(addr);
    Wire.write(0x0F);
    Wire.endTransmission();
    Wire.requestFrom(addr,1);
    byte lowerLevelTherm = Wire.read();
    int temperatureTherm = ((lowerLevelTherm << 8) | upperLevelTherm);
    int celsiusTherm = temperatureTherm*0.0625;

    //First two data registers for the pixel temp data are 0x80 and 0x81
    pixelTempL=0x80;
    pixelTempH=0x81;
    //Get Temperature Data for each pixel in the 8x8 array. Will loop 64 times.
    for(int pixel = 0; pixel <= 63; pixel++){
    //Get lower level pixel temp byte
    Wire.beginTransmission(addr);
    Wire.write(pixelTempL);
    Wire.endTransmission();
    Wire.requestFrom(addr,1);
    byte lowerLevel = Wire.read(); //
    //Get upper level pixel temp byte
    Wire.beginTransmission(addr);
    Wire.write(pixelTempH);
    Wire.endTransmission();
    Wire.requestFrom(addr,1);
    byte upperLevel = Wire.read();
    //Combine the two bytes together to complete the 12-bit temp reading
    int temperature = ((upperLevel << 8) | lowerLevel);
    //Temperature data is in two's compliment, do conversion.
    if (upperLevel != 0)
    {
    temperature = -(2048 - temperature);
    }
    celsius = temperature*0.25;
    //Determine LED color based on temperature of pixel
    if (celsius < 26)
    {
    ledArray[pixel]=GREEN;
    } else if (celsius >=26 && celsius <=30)
    {
    ledArray[pixel]=ORANGE;
    } else
    {
    ledArray[pixel]=RED;
    }
    //Go to next pixel by advancing both the low and high bit two register values
    pixelTempL=pixelTempL+2;
    pixelTempH=pixelTempH+2;
    }

    //Transfer color contents of LED array for display
    digitalWrite(SLAVESELECT, LOW);
    delayMicroseconds(500);
    for(int pixel=0; pixel<=63; pixel++){
    SPI.transfer(ledArray[pixel]);
    }
    delayMicroseconds(500);
    digitalWrite(SLAVESELECT, HIGH);
    } //end loop