/*
    Rotary Encoder - Interrupt Example
    
    The circuit:
    * encoder pin A to Arduino pin 2
    * encoder pin B to Arduino pin 3
    * encoder ground pin to ground (GND)
*/

#include <Rotary.h>

Rotary r = Rotary(2, 3);

void setup() {
  Serial.begin(9600);
  r.begin();
  PCICR |= (1 << PCIE2);
  PCMSK2 |= (1 << PCINT18) | (1 << PCINT19);
  sei();
}

void loop() {

}

ISR(PCINT2_vect) {
  unsigned char result = r.process();
  if (result == DIR_NONE) {
    // do nothing
  }
  else if (result == DIR_CW) {
    Serial.println("ClockWise");
  }
  else if (result == DIR_CCW) {
    Serial.println("CounterClockWise");
  }
}