Day4 02-encoder

• 인터럽트를 사용하여 인코더의 펄스를 세는 코드

int encoderPin = 2;

unsigned long oldTime = 0;

unsigned long newTime = 0;

volatile int count = 0;

void ISREncoder() {

  count++;

}

void setup() {

  // put your setup code here, to run once:

  Serial.begin(9600);

  pinMode(encoderPin, INPUT_PULLUP);

  attachInterrupt(INT0, ISREncoder, FALLING);

}

void loop() {

  // put your main code here, to run repeatedly:

  newTime = millis();

  if (newTime - oldTime > 1000) {

    oldTime = newTime;

    noInterrupts();

    Serial.println(count);

    count = 0;

    interrupts();

  }

}