// Inspiration from the "Simple.ino" example from 
// the EnableInterrupt library.

#include <EnableInterrupt.h>

const int buttonPin = 7;
volatile unsigned long interruptCount;

void interruptFunction() 
{
  interruptCount++;
}

void setup() 
{
  Serial.begin(115200);
  Serial.println("Does the button really bounce ?");
  pinMode(buttonPin, INPUT_PULLUP);
  enableInterrupt(buttonPin, interruptFunction, CHANGE);
}

void loop() 
{
  Serial.print("Pin was interrupted: ");
  Serial.print(interruptCount, DEC);
  Serial.println(" times so far.");
  delay(1000);
}