NOTE: If you do not set the pinMode() to OUTPUT, and connect an LED to a pin, when calli...
// set the digital pin as output: pinMode(ledPin, OUTPUT); Serial.begin(9600); Serial.println("1. Press 'A + {ms}' to start the relay."); Serial.println("2. Press 'B' to pause the relay."); Serial.println("3. Press 'R + [ms]' to repeat testing"); Serial.println("4. ...
voidsetup() { // initialize the LED pin as an output: pinMode(ledPin,OUTPUT); // initialize the pushbutton pin as an input: pinMode(buttonPin,INPUT); } voidloop() { // read the state of the pushbutton value: buttonState=digitalRead(buttonPin); // check if the pushbutton is press...
Write a HIGH or a LOW value to a digital pin. If the pin has been configured as an OUTPUT with pinMode(), its voltage will be set to the corresponding value: 5V (or 3.3V on 3.3V boards) for HIGH, 0V (ground) for LOW. 如果引脚被设置为INPUT,digitalWrite()会激活输入引脚的上拉电阻。
//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 ...
Analog input, analog output, serial output Reads an analog input pin, maps the result to a range from 0 to 255 and uses the result to set the pulsewidth modulation (PWM) of an output pin. Also prints the results to the serial monitor. ...
void Address_set(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2) { Lcd_Write_Com(0x2a); Lcd_Write_Data(x1 >> 8); //设定屏幕数据操作区域的列首地址数据,,先写入16bit数据位的高位 Lcd_Write_Data(x1); //写入16bit数据位的低位 ...
//*(portOutputRegister(digitalPinToPort(LCD_WR)))|= digitalPinToBitMask(LCD_WR); digitalWrite(LCD_WR, LOW); digitalWrite(LCD_WR, HIGH); } //在总线上写入命令。写入前要置RS引脚为低电平。 voidLcd_Write_Com(unsignedcharVH) { *(portOutputRegister(digitalPinToPort(LCD_RS))) &= ~digitalPinTo...
int ledPin = 9; //LED connected to digital pin 9 void setup (){ pinMode(ledPin, OUTPUT); // sets the pinasoutput } void loop (){ analogWrite(ledPin, 255); //set duty cycleto always on } 你可以针对不同的输出将“255”更改为0~255之间的任意数字,也可以修改代码以连续更改该值。
在 Arduino 程序中，digitalWrite(LEDpin, state) 是一个函数，用于将电平写入数字引脚。该函数有两个参数：- LEDpin：数字引脚的编号。- state：布尔值，表示要写入的电平。如果 state 为 HIGH，则表示将高电平写入引脚；如果 state 为 LOW，则表示将低电平写入引脚。因此，digitalWrite(LEDpin, state...