//configure pin2 as an input and enable the internal pull-up resistor pinMode(2, INPUT_PULLUP); pinMode(13, OUTPUT); } void loop() { //read the pushbutton value into a variable int sensorVal = digitalRead(2); //print out the value of the pushbutton Serial.println(sensorVal); //...
pinMode(Button1, INPUT);//按钮1引脚设置为输入 pinMode(Button2, INPUT_PULLUP); //按钮2引脚设置为输入上拉模式 } void loop() { // 读取输入引脚的值 boolean button1State = digitalRead(Button1); boolean button2State = digitalRead(Button2); // 打印结果到串口 Serial.print("button1:"); Ser...
int BUTTON = 8;//定义按钮在 12号引脚,连接一个下拉电阻 int val = 0;//变量val 存储按钮的状态 int old_val = 0;//暂存val变量的上一个时间状态 void setup(){ pinMode(BUTTON, INPUT_PULLUP);//INPUT —— 输入模式 OUTPUT —— 输出模式 INPUT_PULLUP —— 输入上拉模式 Serial.begin(9600);...
#define BUTTON_PIN 4 voidsetup(){ Serial.begin(9600); pinMode(BUTTON_PIN, INPUT_PULLUP); } voidloop(){ Serial.println(digitalRead(BUTTON_PIN)); delay(10); } If you run this code and open the Serial Plotter, you’ll see that the default value is 1 (HIGH). When you press the b...
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 Button2 = 3; //内置上拉电阻_按钮2_3号引脚 void setup() { Serial.begin(9600); //初始化串口波特率为9600 pinMode(Button1, INPUT);//按钮1引脚设置为输入 pinMode(Button2, INPUT_PULLUP); //按钮2引脚设置为输入上拉模式 } void loop() ...
首先在int button =5这里是为了设定一个按钮的端口，这里我们将其设定为5，因此我们需要将线连接到...
格瑞图:Arduino-0009-内置示例-按钮 Button 格瑞图:Arduino-0010-内置示例-去抖 Debounce 1、示例代码及解析 (1)代码 /* Input Pull-up Serial This example demonstrates the use of pinMode(INPUT_PULLUP). It reads a digital input on pin 2 and prints the results to the Serial Monitor. ...
// 定义常量const int buttonPin = 2;const int ledPin = 13;// 按键前一个状态int oldButtonState = HIGH;// 按键状态int buttonState = HIGH;// led灯状态，false->没亮，true->亮boolean ledState = false;void setup() {// 使用内置上拉电阻 pinMode(buttonPin, INPUT_PULLUP); pinMode(led...
int ledPin = 9; //LED 接数字引脚 9int buttonPin = 2; //按键接中断 0，即数字引脚 2void setup() {pinMode(ledPin, OUTPUT);pinMode(buttonPin,INPUT_PULLUP); //按键设为输入模式,内部上拉attachInterrupt(0, testProgram, FALLING); //下降沿触发中断 0，调用 testProgram 函数}void loop(){ ...