// encoder tester by jikun


long temp, counter = 0;


void setup() {
  Serial.begin(9600);
  
  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(6, INPUT_PULLUP);

  attachInterrupt(0, forward, RISING);
  attachInterrupt(1, backward, RISING);

}

void resetCounter() {
  noInterrupts();
  counter = 0;
  interrupts();
}

void loop() {
  if (counter != temp) {
    temp = counter;
    Serial.println(counter);
  }
  if (digitalRead(6) == LOW) {
    resetCounter();
  }
}

void forward() {
  if (digitalRead(3) == LOW) {
    counter++;
  }
  else {
    counter--;
  }
}

void backward() {
  if (digitalRead(2) == LOW) {
    counter--;
  }
  else {
    counter++;
  }
}