IoT 아두이노 0421 - LED_ex2

// LED control value
#define OFF 0
#define RED 0x01
#define GREEN 0x02
#define BLUE 0x04

int pin_GND = 11;  // ground pin
int pin_LED[3] = {8, 9, 10};  // red, green, blue LED pin

void setup() {
  // put your setup code here, to run once:
  pinMode(pin_GND, OUTPUT);  // ground pin Output setup
  pinMode(pin_LED[0], OUTPUT); // red LED pin Output setup
  pinMode(pin_LED[1], OUTPUT); // green LED pin Output setup
  pinMode(pin_LED[2], OUTPUT); // blue LED pin Output setup
  digitalWrite(pin_GND, LOW);  // ground pin LOW Output
}

void loop() {
  // put your main code here, to run repeatedly:
  LED_control(RED);   // red on
  delay(1000);        // wait one second
  LED_control(GREEN); // green on
  delay(1000);        // wait one second
  LED_control(BLUE);  // blue on
  delay(1000);        // wait one second
}

// RGB LED control function ('bxxxxxBGR' -> R-red control bit, G-greeb control bit, B-blue control bit)
void LED_control(uint8_t da)
{
  digitalWrite(pin_LED[0], da & 0x01);  // red LED control
  da >>= 1;                             // 1bit shift to the right
  digitalWrite(pin_LED[1], da & 0x01);  // green LED control
  da >>= 1;                             // 1bit shift to the right
  digitalWrite(pin_LED[2], da & 0x01);  // blue LED control
}