Day1 04_LED_mission

• 2번(빨강), 3번(노랑), 4번(연두)를 2초마다 차례대로 불을 키는 코드

const int ledRPin = 2;

const int ledYPin = 3;

const int ledGPin = 4;

// the setup function runs once when you press reset or power the board

void setup() {

  // initialize digital pin LED_BUILTIN as an output.

  pinMode(ledRPin, OUTPUT);

  pinMode(ledYPin, OUTPUT);

  pinMode(ledGPin, OUTPUT);

}

// the loop function runs over and over again forever

void loop() {

  digitalWrite(ledRPin, HIGH);

  digitalWrite(ledYPin, LOW);

  digitalWrite(ledGPin, LOW);

  delay(2000);

  digitalWrite(ledRPin, LOW);

  digitalWrite(ledYPin, HIGH);

  digitalWrite(ledGPin, LOW);

  delay(2000);

  digitalWrite(ledRPin, LOW);

  digitalWrite(ledYPin, LOW);

  digitalWrite(ledGPin, HIGH);

  delay(2000);

}

 

• 같은 코드(배열, for문, 함수)

#define LED_DELAY 2000

const int ledPin[3] = { 2, 3, 4 };

void setup() {

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

  for (int i = 0; i < 3; i++) {

    pinMode(ledPin[i], OUTPUT);

  }

}

void controlLED(int r, int y, int g) {

  digitalWrite(ledPin[0], r);

  digitalWrite(ledPin[1], y);

  digitalWrite(ledPin[2], g);

}

void loop() {

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

  controlLED(HIGH, LOW, LOW);

  delay(LED_DELAY);

  controlLED(LOW, HIGH, LOW);

  delay(LED_DELAY);

  controlLED(LOW, LOW, HIGH);

  delay(LED_DELAY);

}