digitalWrite(pin,value); 该函数的作用是设置引脚的输出电压为高电平或低电平。该函数也是一个无返回值的的函数。Pin参数表示所要设置的引脚,value参数表示输出的电压HIGH(高电平)或LOW(低电平)。 注意:使用前必须先用pinMode设置。 digitalRead(pin); 该函数在引脚设置为输入的情况下,可以获取引脚的电压情况HIGH(...
pinMode (Encoder_Switch, INPUT); 在void setup()函数中,我们读取输出A引脚的状态以检查引脚的最后状态。然后,我们将使用此信息与新值进行比较,以检查哪个引脚(输出A或输出B)变高。 1 Previous_Output = digitalRead(Encoder_OuputA); //Read the inital value of Output A 最后在loop函数内,我们必须将输出...
pin:要设置其输出的引脚编号 value:HIGH(1),LOW(0) 返回值:无 模拟I/O 函数 Analog I/O Functions analogWrite(): 描述:在指定引脚输出指定占空比的 PWM 方波 函数原型:analogWrite(pin,value) 参数: pin:输出引脚 value:占空比,介于 0 - 255 之间 返回值:无 analogRead(): 描述:读取指定引脚的模拟信...
// read the analog / millivolts value for pin 2: int analogValue = analogRead(1); int analogVolts = analogReadMilliVolts(2); // print out the values you read: Serial.printf("ADC analog value = %d\n",analogValue); Serial.printf("ADC millivolts value = %d\n",analogVolts); delay(...
// make the button‘s pin an input: pinMode(button, INPUT); // to print first value of count_presses which is 0 Serial.println(count_presses); } void loop() { // read the button input pin: int button_state = digitalRead(button); ...
}voidloop() {//read the state of the pushbutton value:buttonState =digitalRead(buttonPin);//check if the pushbutton is pressed. If it is, the buttonState is HIGH:if(buttonState ==HIGH) {//turn LED on:digitalWrite(ledPin, HIGH); ...
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); // Keep in mind the pullup means the pushbutton's ...
();intpotValue=analogRead(A0);intangleValue=map(potValue,0,1023,0,180);radio.write(&angleValue,sizeof(angleValue));delay(5);radio.startListening();while(!radio.available());radio.read(&buttonState,sizeof(buttonState));if(buttonState==HIGH){digitalWrite(led,HIGH);}else{digitalWrite(led,...
is a simple Arduino example. Demonstration of how to use analog pins to read the input from a sensor:```cpp// 定义一个变量来存储读取的值int sensorValue = 0;void setup() { // 初始化串口，设置波特率为9600 Serial.begin(9600);}void loop() { // 读取模拟引脚A0的值 sensorValue =...
#include<Servo.h>Servo myservo;// create servo object to control a servoint potpin=0;// analog pin used to connect the potentiometerintval;// variable to read the value from the analog pinvoidsetup() { myservo.attach(9);// attaches the servo on pin 9 to the servo object}voidloop()...