Day2 02_button

• 버튼을 연결해 led 제어(풀업저항 때문에 평소엔 1 누르면 0)

const int buttonPin = 2;

const int ledPin = 10;

void setup() {

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

  Serial.begin(9600);

  pinMode(buttonPin, INPUT_PULLUP);

  pinMode(ledPin, OUTPUT);

}

void loop() {

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

  int Value = digitalRead(buttonPin);

  Serial.println(Value);

  if (Value == LOW) {

    digitalWrite(ledPin, HIGH);

  } else {

    digitalWrite(ledPin, LOW);

  }

}

 

• 똑같은 코드이지만 while문을 걸어 안정적이게 led 상태가 바뀜

const int buttonPin = 2;

const int ledPin = 10;

int ledState = LOW;

void setup() {

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

  Serial.begin(9600);

  pinMode(buttonPin, INPUT_PULLUP);

  pinMode(ledPin, OUTPUT);

}

void loop() {

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

  int Value = digitalRead(buttonPin);

  Serial.println(Value);

  if (Value == LOW) {

    ledState = !ledState;

    while (!digitalRead(buttonPin));

  }

  digitalWrite(ledPin, ledState);

}