Beetle 树莓派RP2350 环境安装与呼吸灯示例 简单

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);//设置引脚为输出模式
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH); //输出高电平，点亮LED灯
  delay(1000);                    // 延时一秒钟
  digitalWrite(LED_BUILTIN, LOW);  //输出低电平，熄灭LED灯 
  delay(1000);                   //延时一秒    
}

/*
  Fade

  This example shows how to fade an LED on pin 9 using the analogWrite()
  function.

  The analogWrite() function uses PWM, so if you want to change the pin you're
  using, be sure to use another PWM capable pin. On most Arduino, the PWM pins
  are identified with a "~" sign, like ~3, ~5, ~6, ~9, ~10 and ~11.

  This example code is in the public domain.

  https://www.arduino.cc/en/Tutorial/BuiltInExamples/Fade
*/

int led = 9;           // the PWM pin the LED is attached to
int brightness = 0;    // how bright the LED is
int fadeAmount = 5;    // how many points to fade the LED by

// the setup routine runs once when you press reset:
void setup() {
  // declare pin 9 to be an output:
  pinMode(led, OUTPUT);
}

// the loop routine runs over and over again forever:
void loop() {
  // set the brightness of pin 9:
  analogWrite(led, brightness);

  // change the brightness for next time through the loop:
  brightness = brightness + fadeAmount;

  // reverse the direction of the fading at the ends of the fade:
  if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;
  }
  // wait for 30 milliseconds to see the dimming effect
  delay(30);
}

int brightness = 0;    // how bright the LED is
int fadeAmount = 5;    // how many points to fade the LED by
void setup() {
  pinMode(LED_BUILTIN, OUTPUT);//设置引脚为输出模式
}

void loop() {
  // set the brightness of LED_BUILTIN:
  analogWrite(LED_BUILTIN, brightness);

  // change the brightness for next time through the loop:
  brightness = brightness + fadeAmount;

  // reverse the direction of the fading at the ends of the fade:
  if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;
  }
  // 若亮度为0则持续1秒黑屏；否则持续50ms亮度brightness
  if(brightness==0){
    digitalWrite(LED_BUILTIN, LOW);  //输出低电平，熄灭LED灯 
    delay(1000);                   //延时一秒    
  }else{
    delay(80);
  }
}