const int buttonPin = 2; // the pin that the pushbutton is attached to const int ledPin = 13; // the pin that the LED is attached to // Variables will change: int buttonPushCounter = 0; // counter for the number of button presses int buttonState = 0; // current state of the...
buttonState=0;// current state of the buttonintlastButtonState=0;// previous state of the buttonvoidsetup(){// initialize the button pin as a input:pinMode(buttonPin,INPUT);// initialize the LED as an output:pinMode(ledPin,OUTPUT);// initialize serial communication:Serial.begin(9600);}v...
Often, you don't need to know the state of a digital input all the time, but you just need to know when the input changes from one state to another. For example, you want to know when a button goes from OFF to ON. This is called state change detection, or edge detection. 通常,...
int buttonState = 0; // 按键状态的变量 void setup() { // 初始化LED作为输出: pinMode(ledPin, OUTPUT); // 初始化按键作为输入: pinMode(buttonPin, INPUT); } void loop(){ // 读取按键值: buttonState = digitalRead(buttonPin); // 检查按键是否被按下. //如果是 buttonState就为high: if...
/* * State change detection: 检测按键按下的状态并累计次数 */ // 定义端口 const int ledPin = 13; const int buttonPin = 2; // 设置变量 int currentButtonState = 0; int lastButtonState = 0; int count = 0; void setup() { // 初始化端口 pinMode(ledPin, OUTPUT); pinMode(buttonPin...
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 ...
lastButtonState: lastButtonState = reading; } 项目九材料清单 按三下按键点亮 LED ? ? ? /* State change detection (edge detection 边缘检测) Often, you don't need to know the state of a digital input all the time,but you just need to know when the input changes from one state to ...
5.2.2Button 5.2.3Debounce 5.2.4DigitalInputPullup 5.2.5StateChangeDetection 5.2.6toneKeyboard 5.2.7toneMelody 5.2.8toneMultiple 5.2.9tonePitchFollower 5.3模拟信号处理开发例程 5.3.1AnalogInOutSerial 5.3.2AnalogInput 5.3.3AnalogWriteMega 5.3.4Calibration ...
* Reset the button state machine. */ void reset(void); /* * return number of clicks in any case: single or multiple clicks */ int getNumberClicks(void); /** * @return true if we are currently handling button press flow * (This allows power sensitive applications to know when it is...
pinMode(buttonPin, INPUT);将按钮定义为输入单位。 buttonState = digitalRead(buttonPin);描述: 从指定的数字引脚读取数值,HIGH或LOW. 语法: digitalRead(pin) 变量: pin(引脚): 你想要读取的Arduino的 pin(引脚)。 该功能用于读取数字引脚的状态,即高电平(HIGH)还是低电平(LOW)。 按下按钮时,状态为高电平,...