PinChangeInt Example
This code counts the number of times pin 15 (aka Analog 1) changes state and prints the count when it recives a p on the serial port.
/*
Copyright 2011 Lex.V.Talionis at gmail
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
*/
#include <PinChangeInt.h>
#include <PinChangeIntConfig.h>
#define PIN 15 // the pin we are interested in
volatile byte burp=0; // a counter to see how many times the pin has changed
byte cmd=0; // a place to put our serial data
void setup() {
Serial.begin(9600);
Serial.print("PinChangeInt test on pin ");
Serial.print(PIN);
Serial.println();
pinMode(PIN, INPUT); //set the pin to input
digitalWrite(PIN, HIGH); //use the internal pullup resistor
PCintPort::attachInterrupt(PIN, burpcount,RISING); // attach a PinChange Interrupt to our pin on the rising edge
// (RISING, FALLING and CHANGE all work with this library)
// and execute the function burpcount when that pin changes
}
void loop() {
cmd=Serial.read();
if (cmd=='p')
{
Serial.print("burpcount:\t");
Serial.println(burp, DEC);
}
cmd=0;
}
void burpcount()
{
burp++;
}