输入上拉模式 arduino内部自带上拉电阻,所以我们要完成上面的操作,完全就可以把引脚设置成 输入上拉模式(INPUT_PULLUP)。 pinMode(pin,INPUT_PULLUP); 使用按钮控制LED 程序 boolean pushButton; void setup() { // put your setup code here, to run once: Serial.begin(9600); pinMode(2,INPUT_PULLUP);...
boolean buttonState = digitalRead(pushButton); digitalWrite(led, buttonState); 另外就是这个代码的效果是按下LED亮,松开则灭,我想改进一下,按一下亮,再按一下灭,代码如下: //按键开关控制LED灯,按一下亮,再按一下灭 const int buttonpin = 2;//button连接引脚 const int ledpin = 13;//led连接引脚 ...
//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); //...
//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); //...
Arduino Logic Control (1): Push button switch to control LED lights.首先打开Arduino IDE，依次选择文件，示例，Digital,DigitallnputPullup。将此程序上传到Arduino开发板上，可以发现在之前的示例中也一直有一个上拉电阻，但是在本次演示中，上拉电阻是不存在的，因为本次演示是通过输入上拉模式。Start by ...
int Button1 = 2; //下拉电阻_按钮1_2号引脚 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 ...
There are different ways of connecting a push-button to the Arduino board: You can connect to a power source and ground (GND), then specify if the push-button will be a pull-up or pull-down input. You can use a resistor to connect the push-button as either pull-up or pull-down. ...
String message = “Pull Up: ” + String(buttonUpState); message = message + “。 Pull Down: ” + String(buttonDownState); // send the message Serial.println(message); delay(1); // delay in between reads for stability } 在这里,没有什么新内容了,除了该行String message =“ Pull Up:”...
What is the Arduino INPUT_PULLUP option for the pinMode function? In this tutorial I will show you different examples, using an Arduino board and a simple push button, to explain what INPUT_PULLUP does, and how to use it in your Arduino programs. ...
//configure pin 2 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 ...