ADS1115 with Adruino Continuous 4 Chanel

 

//
//    FILE: ADS_continuous_4_channel.ino
//  AUTHOR: Rob.Tillaart
// VERSION: 0.1.2
// PURPOSE: read multiple analog inputs continuously
//          interrupt driven to catch all conversions.
//

// test
// connect multiple potmeters
//
// GND ---[   x   ]------ 5V
//            |
//
// measure at x  - connect to AIN0..4.
//
// for the test it is good to have AIN3 connected to 5V and AIN4 to GND
// so one can see these as references in the output.
//

#include "ADS1X15.h"

// choose you sensor
// ADS1013 ADS(0x48);
// ADS1014 ADS(0x48);
// ADS1015 ADS(0x48);
// ADS1113 ADS(0x48);
// ADS1114 ADS(0x48);
ADS1115 ADS(0x48);

volatile bool RDY = false;
uint8_t channel = 0;
int16_t val[4] = { 0, 0, 0, 0 };

void setup()
{
  Serial.begin(115200);
  Serial.println(__FILE__);
  Serial.print("ADS1X15_LIB_VERSION: ");
  Serial.println(ADS1X15_LIB_VERSION);

  pinMode(2, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(2), adsReady, RISING);

  ADS.begin();
  ADS.setGain(0);        // 6.144 volt
  ADS.setDataRate(7);    // slow

  // SET ALERT RDY PIN
  ADS.setComparatorThresholdHigh(0x8000);
  ADS.setComparatorThresholdLow(0x0000);
  ADS.setComparatorQueConvert(0);

  // SET INTERRUPT HANDLER TO CATCH CONVERSION READY
  pinMode(2, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(2), adsReady, RISING);

  ADS.setMode(0);        // continuous mode
  ADS.readADC(channel);     // trigger first read
}

void loop()
{
  handleConversion();

  for (int i = 0; i < 4; i++)
  {
    Serial.print(val[i]);
    Serial.print('\t');
    handleConversion();
  }
  Serial.println();
  delay(100);
}

void adsReady()
{
  RDY = true;
}

void handleConversion()
{
  if (RDY)
  {
    // save the value
    val[channel] = ADS.getValue();
    // request next channel
    channel++;
    if (channel >= 4) channel = 0;
    ADS.readADC(channel);
    RDY = false;
  }
}