pin参数表示要配置的引脚,mode参数表示设置的参数INPUT(输入)和OUTPUT(输出)。INPUT参数用于读取信号,OUTPUT用于输出控制信号。PIN的范围是数字引脚0-13,也可以把模拟引脚(A0-A5)作为数字引脚使用,此时编号为14脚对应模拟引脚0,19引脚对应模拟引脚5,。一般会放在setup里,先设置再使用。 digitalWrite(pin,value); 该函...
begin(9600); } void loop() { // 读取按键端口数据 currentButtonState = digitalRead(buttonPin); if (currentButtonState != lastButtonState){ // 检测按键状态是否与上一状态一样 if (currentButtonState == HIGH){ // 若不一样,则判断当前按键状态是否为按下 digitalWrite(ledPin, HIGH); count++;...
pinMode(REED_PIN, INPUT_PULLUP);// Enable internal pull-up for the reed switchpinMode(LED_PIN, OUTPUT); }voidloop(){intproximity = digitalRead(REED_PIN);// Read the state of the switch// If the pin reads low, the switch is closed.if(proximity == LOW) { Serial.println("Switch cl...
pinMode(PinZ, INPUT_PULLUP);//同上 attachInterrupt(0, Encode, FALLING);//脉冲中断函数:捕捉A相信号,并判断A、B相先后顺序 attachInterrupt(1, Set_state , FALLING);//用于在捕捉到Z的零信号时,进行状态置零 Serial.begin (9600); } void loop() { double distance; //正转 if (count == 2500)...
} else if (state & (SHIFT_L | SHIFT_R)) {if (s < PS2_KEYMAP_SIZE)c = pgm_read_byte(keymap->shift + s);} else {if (s < PS2_KEYMAP_SIZE)c = pgm_read_byte(keymap->noshift + s);}if (state & CTRL) { //ctrl加字母组合键CombinationKey = 1;if (c >= 'A' && c <= ...
pinMode(relay1Pin, OUTPUT); pinMode(relay2Pin, OUTPUT); } void loop(){ // read the value from the sensor: sensorValue =analogRead(sensorPin); //print out the value of the pushbutton Serial.println(sensorValue); // read the state of the pushbutton values: ...
Keypad Pin R4 –> Arduino Pin 9 测试矩阵键盘部分接线示意图 矩阵键盘所需库文件<Keypad> 在Arduino IDE 1.8.10 或者以上版本中, 项目->加载库->管理库中搜索Keypad,然后安装即可。 也可以下载库(需要下载库文件 https://github.com/Chris--A/Keypad),然后手动添加到IDE中。
ReadValue = GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_7); HAL 库(支持图形化初始配置) //1.配置时钟 //宏定义方式 __HAL_RCC_GPIOA_CLK_ENABLE(); //2.配置引脚 GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStruct.Pin = GPIO_PIN_1; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; ...
// 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); ...
voidsetup(){pinMode(button,INPUT);//设置为输入pinMode(LED,OUTPUT);//设置为输出}voidloop(){if(digitalRead(button)==HIGH)//如果读取高电平digitalWrite(LED,HIGH);//13脚输出高电平elsedigitalWrite(LED,LOW);//否则输出低电平} 二·高级I/O 1.pulseIn(pin,state); 介绍:pin是指定引脚,state是脉冲状...