Pushbuttons often generate spurious open/close transitions when pressed, due to mechanical and physical issues: these transitions may be read as multiple presses in a very short time fooling the program. This example demonstrates how todebouncean input, which means checking twice in a short period...
Blink Without Delay: 不用delay()函数,使LED灯闪烁 Button: 用一个按钮来控制LED灯 Debounce: 读取一个按钮,并滤掉噪音 Button State Change: 记录按键按下的次数 Input Pullup Serial: 示范怎么用pinMode()来上拉引脚 Tone: play 用压电扬声器弹奏一个旋律 Pitch follower: 用模拟输入来操作压电扬声器弹奏一个...
if (buttonPushCounter % 4 == 0) { digitalWrite(ledPin, HIGH); } else { digitalWrite(ledPin, LOW); } } [Get Code] 更多 pinMode() digitalWrite() digitalRead() millis() if BlinkWithoutDelay - 不用delay()函数,使LED灯闪烁 Button - 用一个按钮来控制LED灯 Debounce - 读取一个按钮,并滤...
if ((currentMillis - debounceMillis) > debouncePeriod && buttonPushed) // 产生 20ms 的去抖延迟以避免多次按下 { debounceMillis = currentMillis; // 保存最后的去抖动延迟时间 if (digitalRead(pushButton) == LOW && lastState == HIGH) // 按下按钮后改变LED { ledChange = ! 领导改变; digitalW...
= currentMillis; // save the last debounce delay timeif (digitalRead(pushButton) == LOW && ...
buttonState = digitalRead(buttonPin); // 检查按键是否被按下. //如果是 buttonState就为high: if (buttonState == HIGH) { // 点亮LED: digitalWrite(ledPin, HIGH); } else { // 熄灭LED: digitalWrite(ledPin, LOW); } } (3)Debounce 消抖 ...
if (digitalRead(2)==LOW && debounce1 == true) //Button 1 Pressed { song_number++; if (song_number==5) {song_number=1;} debounce1=false; Serial.println("KEY PRESSED"); Serial.print("song_number="); Serial.println(song_number); ...
digitalRead(LED));last_switch=millis();// 记录最后一次切换的时间}voidloop(){do{if((current-last_switch)<switch_interval){break;// 检查debounce状态}switch_led();}while(false);// 请务必确认中断可以响应sleep_mode();//直接休眠,等待唤醒。// -> 被唤醒时,其实应该执行到这一行,但这个loop调用...
See DebounceTest example. Button 1 can used at any pin supporting pin change interrupt. The exact pin numbers of the buttons are available by the macros INT0_PIN and INT1_PIN, which are set after the include.Table of available pins for the 2 buttons...
debounceMillis = currentMillis; // save the last debounce delay time //开关控制红灯 if (digitalRead(pushButton) == LOW && lastState == HIGH) // change the led after push button is pressed { ledChange = ! ledChange; digitalWrite(toggleLed, ledChange); ...