Arduino控制全彩LED

full-rgb.c

// 如果是共阳的LED，取消下一行的注释
// #define COMMON_ANODE

const int redPin = A0; // 红色引脚
const int greenPin = A1; // 绿色引脚
const int bluePin = A2; // 蓝色引脚

void setup() {
}

void loop() {
  setColor(0xff, 0, 0); // 红色
  delay(1000);
  setColor(0, 0xff, 0); // 绿色
  delay(1000);
  setColor(0, 0, 0xff); // 蓝色
  delay(1000);
  setColor(0xff, 0xff, 0); // 黄色
  delay(1000);
  setColor(0, 0xff, 0xff); // 青色
  delay(1000);
  setColor(0xff, 0, 0xff); // 洋红
  delay(1000);
  setColor(0xff, 0xff, 0xff); // 白色
  delay(1000);
}

// 设置LED的颜色
void setColor(int red, int green, int blue)
{
  #ifdef COMMON_ANODE
    red = 255 - red;
    green = 255 - green;
    blue = 255 - blue;
  #endif

  // 设置RGB针脚的电压，有效值0-255，对应0-5V电压
  analogWrite(redPin, red);
  analogWrite(greenPin, green);
  analogWrite(bluePin, blue);  
}