如何将 LED 和压电与 arduino 上的按钮结合起来？

Question

我想知道如何将我的 LED 和压电蜂鸣器组合在一个代码中。我想一按下按钮就停止播放音乐，同时打开一盏灯（LED）。我的代码不工作，你能告诉我应该怎么做吗？

      int buttonState = 0;
      int speakerPin = 10;
      int buttonPin= 7;
      int frequency = 500;
      int ledPin = 13;
      int length = 17; // the number of notes
      char notes[] = "gcefgcefgcefgcefga "; // a space represents a rest
      int beats[] = {2,2,1,1,2,2,1,1,2,2,1,1,2,2,1,1};
      int tempo = 250;

      void setup() {            
        pinMode(speakerPin, OUTPUT);
        pinMode(ledPin, OUTPUT);
        pinMode(buttonPin,INPUT);
      }

      void loop() {
        buttonState = digitalRead(buttonPin);

        if (buttonState==HIGH){
          digitalWrite(ledPin, HIGH);
          noTone(speakerPin);
        }else {
          char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
          char notes[] = "gcefgcefgcefgcefga ";         
          digitalWrite(ledPin, LOW);
          digitalWrite(speakerPin,HIGH);
          if (long i = 0; i < duration * 5000L; i += tone * 15) {

          }

      void playTone(int tone, int duration) {

          for (long i = 0; i < duration * 5000L; i += tone * 15) {
          if (buttonState==LOW){
          digitalWrite(speakerPin, HIGH);
          delayMicroseconds(tone);
          digitalWrite(speakerPin, LOW);
          delayMicroseconds(tone);
          } 
        }
      }

      }}

Answer 1

您的代码无法正常工作的原因可能有多种。对于初学者：您还没有定义 noTone 并且我没有看到 playTone 实际被使用，但在高层次上您想要做的事情非常简单，这个伪代码应该有所帮助：

 void loop() {
    buttonState = digitalRead(buttonPin);
    if buttonState==LOW

    playTone();
    digitalWrite(ledPin, LOW);
    else {break out of loop}
    //add in your pause here
    delayMicroseconds(pause);//I'm not sure why you put tone here in your code, just initialize int of 1000 or something  

}

你明白了！希望这对您有所帮助！

如何将 LED 和压电与 arduino 上的按钮结合起来？

How can I combine an LED and a piezzo with a push button on arduino?

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