Pin Change Interrupt

/* 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++; }