INTERRUPT PINS

Im writting a program that uses the function attachinterrupt . The pins are different form that of the arduino pins . Im attaching the snippet where Im using the interrupt. Please  help me out by saying which pin I hav to connect in order to use INT0?

define LCD_REFRESH_INTERVAL_MS 100

/* Pin assignments */

#define INTERRUPT_INPUT 2

#define NUM_CODES (32)
#define NUM_WORDS (32)
#define NUM_ABB   (33)

// variables to store it in array and conversion

int i=0;
char pattern[6];
char english[50];
char *final_string[50];
char fin[40];
int index=0;


int abb_flag=0;

void interrupt_handler()
{
  pulse_counter = pulse_counter + 1;
}

void setup()
{

  // for interrupt of the microphone

  Serial.begin(9600);
   emicSerial.begin(9600);
  pinMode(ledPin, OUTPUT);
  pinMode(rxPin, INPUT);
  pinMode(txPin, OUTPUT);
 
 
    
                      // For noise suppression, enable pullup on interrupt pin
  digitalWrite(INTERRUPT_INPUT, HIGH);
  attachInterrupt(INTERRUPT_INPUT - 2,                                                                       //  2-2=0, 0th pin
                   interrupt_handler,
                  RISING);
  // interrupt microphone ends

 
}

....

.

..

.

...

Here the pin
I hvae used is PIN 0 (i.e) analog0 . Please correct me if I'm wrong

  • Hi satabios,

    If you are going to use  INT0 for external Interrupt then you have to use digital pin D1.

    See the below GR Peach Pin Map.

    INT0- D1

    INT1- D0

    INT2- A0

    INT3- A1

    INT4- A2

    INT5- A3

    Sample Program for using INT0 (D1) for External Interrupt in GR Peach:-

    #include <Arduino.h>
     
    int ledpin = PIN_LED_BLUE;
    int intpin = 1;
    volatile int state = LOW;
    void blink()
    {
      state = !state;
    }
      
    void setup()
    {
      pinMode(ledpin, OUTPUT);
      pinMode(intpin, INPUT_PULLUP);
     
      attachInterrupt(0, blink, CHANGE);
    }
      
    void loop()
    {
      digitalWrite(ledpin, state);
    }

    Hope you find this information useful!!