按键长按短按的代码

蔚落 2024-03-27 12:31 84阅读 0赞

你好，如果你想要实现长按短按的功能，可以使用以下代码。

int buttonState = 0;
    long lastDebounceTime = 0;  // the last time the output pin was toggled
    long debounceDelay = 50;    // the debounce time; increase if the output flickers
    
    void setup() {
      // put your setup code here, to run once:
      pinMode(2, INPUT_PULLUP);
    }
    
    void loop() {
      // put your main code here, to run repeatedly:
      int reading = digitalRead(2);
    
      if (reading != buttonState) {
        // reset the debouncing timer
        lastDebounceTime = millis();
      }
    
      if ((millis() - lastDebounceTime) > debounceDelay) {
        // whatever the reading is at, it's been there for longer
        // than the debounce delay, so take it as the actual current state:
    
        // if the button state has changed:
        if (reading != buttonState) {
          buttonState = reading;
    
          if (buttonState == LOW) {
            // the button state is LOW, which means it's being pressed
            // do something here
          }
          else {
            // the button state is HIGH, which means it's not being pressed
            // do something here
          }
        }
      }
    }

这段代码使用了一个变量 `buttonState` 来存储按键的当前状态(按下或未按下)，并使用变量 `lastDebounceTime` 来记录按键状态最后一次改变的时间。每次执行循环时，都会读取按键的状态，并与存储在 `buttonState` 中的值进行比较。如果不同，则将 `lastDebounceTime` 重置为当前时间。接下来，程序会检查是否已经过了一段时间(在这里设置为 50 毫秒)，如果是，则认为按键的状态已经稳定，可以执行相应的操作。

希望这能帮到你。