if (buttonState == HIGH) { ledState = !ledState; } } } // set the LED: digitalWrite(ledPin, ledState); // save the reading. Next time through the loop, it'll be the lastButtonState: lastButtonState = reading; } (2)注释 /* Debounce 去抖 Each time the input pin goes from LO...
millis() Button - 用一个按钮来控制LED灯 Debounce - 读取一个按钮,并滤掉噪音 DigitalInputPullup - 示范怎么用pinMode()来上拉引脚 StateChangeDetection - 记录按键按下的次数 toneKeyboard - 一个用压力传感器和压电扬声器的三键音乐键盘 toneMelody - 用压电扬声器弹奏一个旋律 toneMultiple - 用tone()命令...
Arduino button debounce library for various switch types, port expanders and other 8-bit data sources. Fast and robust debounce algorithm. - Dlloydev/Toggle
if ((millis() - lastDebounceTime) > debounceDelay) { if (reading != buttonState) { buttonState = reading;if (buttonState == HIGH) { ledState = !ledState;} } } digitalWrite(ledPin, ledState);lastButtonState = reading;} 逐行分解，这段代码的功能如下：将LED初始状态设置为打开，并将开关...
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高音 ...
int buttonState; int lastButtonState = LOW; 初始化一个去抖动初始时间 unsigned long lastDebounceTime = 0; 将重复检查的间隔设置为50毫秒 unsigned long debounceDelay = 50; 将开关状态保存在reading内 int reading = digitalRead(buttonPin); 如果现在读取的开关状态不符合上一次读取的状态的话。。。
pinMode(buttonPin, INPUT); pinMode(ledPin, OUTPUT); digitalWrite(ledPin, ledState); } void loop() { int reading = digitalRead(buttonPin); if (reading != lastButtonState) { lastDebounceTime = millis(); } if ((millis() - lastDebounceTime) > debounceDelay) { ...
unsigned long debounceDelay = 50; 将开关状态保存在reading内 int reading = digitalRead(buttonPin); 如果现在读取的开关状态不符合上一次读取的状态的话。。。 if (reading != lastButtonState) { 将当前时间保存为去抖动的初始时间 lastDebounceTime = millis(); 如果现在时间减去去抖动初始时间超过了检测间隔。
long debounceDelay = 50; // 对Arduino电路板或相关状态进行初始化方法 void setup() { // 设置按键的针脚为输入状态 pinMode(buttonPin, INPUT); // 设置电路板上LED神灯的针脚状态为输出状态 pinMode(ledPin, OUTPUT); // 设置电路板上LED神灯的初始状态, ...
// Read button - Debounce if (digitalRead(button) == true) { pressed = !pressed; } while (digitalRead(button) == true); delay(20); // If button is pressed - change rotation direction if (pressed == true & rotDirection == 0) { ...