防彈跳 一個led + btn

 int reading;

boolean led_state ;//你宣告int led_state也可以pass

int btn_state;

int last_btn_state = LOW;

long last_debounce_time = 0;

void setup()

{

  Serial.begin(9600);

  pinMode(10, OUTPUT);

  pinMode(2, INPUT);

}

void loop()

{

  reading = digitalRead(2);

  if (reading != last_btn_state)

  {

    last_debounce_time = millis();

  }

  if ((millis() - last_debounce_time) > 50)

  {

    if (reading != btn_state)

    {

      btn_state = reading;//先交插state reading swap

      if (btn_state == LOW)

      {

        led_state=!led_state;//按下去再變化

        Serial.println(led_state);

        digitalWrite(10, led_state);

      }

    }

  }

  last_btn_state = reading;

}