从程序看该引脚已配置成输入,因此,这个引脚本身无所谓开关,只是根据这个引脚的逻辑状态去控制LED的开关。
对于Arduino,用pinMode将IO口设为OUTPUT的时候,其实IO的状态为“强推挽”,也就是说设为高电平时,I...
intbuttonPin=2;intledPin=13; boolean ledstate=false;//初始时候灯是灭的voidsetup() {//put your setup code here, to run once:pinMode(ledPin,OUTPUT); pinMode(buttonPin,INPUT_PULLUP); }voidloop() {//put your main code here, to run repeatedly:while(digitalRead(buttonPin)==HIGH) {if(...
varW_ADCValue);if(myGizwits.hasBeenSet(EVENT_led_onoff)){myGizwits.read(EVENT_led_onoff,&varR_LED_OnOff);//Address for storing data}if(varR_LED_OnOff==1){digitalWrite(myledPin,HIGH);// sets the user LED on}else{digitalWrite(myledPin,LOW);...
digitalWrite():将数字引脚写HIGH(高电平)或LOW(低电平) 如果该引脚通过pinMode()设置为输出模式(OUTPUT),您可以通过digitalWrite()语句将该引脚设置为HIGH(5伏特)或LOW(0伏特/GND)。 如果该引脚通过pinMode()设置为输入模式(INPUT),当您通过digitalWrite()语句将该引脚设置为HIGH时, 这与将该引脚将被设置为输入...
pinMode(slaveSelectPin, OUTPUT); pinMode(增加,输入); pinMode(减少,输入); pinMode(current_sense,输入); pinMode(电压感应,输入); // 初始化 SPI: SPI.begin(); //设置LCD的列数和行数: lcd.begin(16, 2); // 向 LCD 打印一条消息。
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 pressed. If it is, the buttonState is HIGH: ...
voidsetup() {pinMode(PC13, OUTPUT); Serial.begin(115200);// Ignored by Maple. But needed by boards using hardware serial via a USB to Serial adaptorSerial.println("setup"); } voidloop() {digitalWrite(PC13, HIGH);// turn the LED on (HIGH is the voltage level)delay(100);// wait fo...
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 (buttonState == HIGH) { ...
以下是一个简单的示例代码,演示如何使用Arduino Mega 2560的数字IO:“`cppvoid setup {// 设置引脚2为输出,引脚3为输入pinMode;pinMode;}void loop { // 向引脚2写入HIGH电平 digitalWrite; // 读取引脚3的电平状态,并打印到串行监视器 int sensorValue = digitalRead; ...