AMG88_Arduino.ino

/*******************************************************************************
// SWITCHSCIENCE wiki -- http://trac.switch-science.com/
// AMG88 Arduino Sample
*******************************************************************************/
#include <Wire.h>

#define PCTL 0x00
#define RST 0x01
#define FPSC 0x02
#define INTC 0x03
#define STAT 0x04
#define SCLR 0x05
#define AVE 0x07
#define INTHL 0x08
#define TTHL 0x0E
#define INT0 0x10
#define T01L 0x80

#define AMG88_ADDR 0x69 // in 7bit


void setup()
{
    Serial.begin(115200);
    Wire.begin();
    
    int fpsc = B00000000;// 1fps
    datasend(AMG88_ADDR,FPSC,&fpsc,1);
    int intc = 0x00; // diff interrpt mode, INT output reactive
    datasend(AMG88_ADDR,INTC,&intc,1);
    // moving average output mode active
    int tmp = 0x50;
    datasend(AMG88_ADDR,0x1F,&tmp,1);
    tmp = 0x45;
    datasend(AMG88_ADDR,0x1F,&tmp,1);
    tmp = 0x57;
    datasend(AMG88_ADDR,0x1F,&tmp,1);
    tmp = 0x20;
    datasend(AMG88_ADDR,AVE,&tmp,1);
    tmp = 0x00;
    datasend(AMG88_ADDR,0x1F,&tmp,1);

    int sensorTemp[2];
    dataread(AMG88_ADDR,TTHL,sensorTemp,2);
    // 
    // Serial.print("sensor temperature:");
    // Serial.println( (sensorTemp[1]*256 + sensorTemp[0])*0.0625);
}

void loop()
{
    Serial.println("[");
    // Wire library cannnot contain more than 32 bytes in bufffer
    // 2byte per one data
    // 2 byte * 16 data * 4 times
    int sensorData[32];
    for(int i = 0; i < 4; i++)
    {
        // read each 32 bytes 
        dataread(AMG88_ADDR, T01L + i*0x20, sensorData, 32);
        for(int l = 0 ; l < 16 ; l++)
        {
            int16_t temporaryData = (sensorData[l * 2 + 1] * 256 ) + sensorData[l * 2];
            float temperature;
            if(temporaryData > 0x200)
            {
                temperature = (-temporaryData +  0xfff) * -0.25;
            }else
            {
                temperature = temporaryData * 0.25;
            }
            Serial.print(temperature);
            if( (l + i * 16)<63 ) Serial.print(",");
        }
        Serial.println();
    }
    Serial.println("]");
    
    delay(100);
}

void datasend(int id,int reg,int *data,int datasize)
{
    Wire.beginTransmission(id);
    Wire.write(reg);
    for(int i=0;i<datasize;i++)
    {
        Wire.write(data[i]);
    }
    Wire.endTransmission();
}

void dataread(int id,int reg,int *data,int datasize)
{
    Wire.beginTransmission(id);
    Wire.write(reg);
    Wire.endTransmission(false);
    Wire.requestFrom(id, datasize, false);
    for(int i=0;i<datasize;i++)
    {
        data[i] = Wire.read();
    }
    Wire.endTransmission(true);
}