Arduino UNO3、Grove- I2C ADCであそぶ

結果

プログラム(ほぼサンプルそのまま(なぜか漢字が入っていたので除いた))

#include <Wire.h>

#define ADDR_ADC121             0x50 // For v1.0 & v1.1, I2C address is 0x55

#define V_REF 3.00

#define REG_ADDR_RESULT         0x00
#define REG_ADDR_ALERT          0x01
#define REG_ADDR_CONFIG         0x02
#define REG_ADDR_LIMITL         0x03
#define REG_ADDR_LIMITH         0x04
#define REG_ADDR_HYST           0x05
#define REG_ADDR_CONVL          0x06
#define REG_ADDR_CONVH          0x07

unsigned int getData;
float analogVal=0;         // convert
void init_adc()
{
  Wire.beginTransmission(ADDR_ADC121);        // transmit to device
  Wire.write(REG_ADDR_CONFIG);                // Configuration Register
  Wire.write(0x20);
  Wire.endTransmission();  
}

void read_adc()     //unsigned int *data
{


    Wire.beginTransmission(ADDR_ADC121);        // transmit to device
    Wire.write(REG_ADDR_RESULT);                // get result
    Wire.endTransmission();

    Wire.requestFrom(ADDR_ADC121, 2);           // request 2byte from device
    delay(1);
    if(Wire.available()<=2)
    {
      getData = (Wire.read()&0x0f)<<8;
      getData |= Wire.read();
    }
    Serial.print("getData:");
    Serial.println(getData);
    delay(5);
    Serial.print("The analog value is:");
    Serial.print(getData*V_REF*2/4096); 
    Serial.println("V");
}
void setup()
{
  Serial.begin(9600);
  Wire.begin();
  init_adc();
}

void loop()
{  read_adc();//adcRead);
   delay(50);
}