pinMode(ledPin, OUTPUT); // initialize the pushbutton pin as an input: pinMode(buttonPin, INPUT); } void loop(){ // read the state of the pushbutton value: buttonState = digitalRead(buttonPin); // check if the pushbutton is pressed. // if it is, the buttonState is HIGH: if (...
const int ledPin = 13; int buttonState = 0; void setup() { pinMode(ledPin, OUTPUT); pinMode(buttonPin, INPUT); } void loop() { buttonState = digitalRead(buttonPin); if (buttonState == HIGH) { digitalWrite(ledPin, HIGH); } else { digitalWrite(ledPin, LOW); } } 逐行分解,这段...
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上拉(INPUT_PULLUP)模式相同。 获得更多关于输入上拉(INPU...
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。 If the pin is configured as an INPUT, digitalW...
10.1 HIGH|LOW(引脚电压定义) 10.2 INPUT|OUTPUT(数字引脚(Digital pins)定义) 10.3 true | false(逻辑层定义) 10.4 integer constants(整数常量) 10.5 floating point constants(浮点常量) 十一、数据类型 11.1 void 11.2 boolean(布尔) 11.3 char(有号数据类型) ...
(B_BUTTON, INPUT);53pinMode(MODE_BUTTON, INPUT);54}5556/*57* 消抖动函数:58* button: 要消抖动的按钮59* last: 该按钮的上一个状态60* 返回值:消抖动后读回的按钮状态61*/62boolean debounce(intbutton, boolean last) {63boolean current =digitalRead(button);64if(last !=current) {65delay(5)...
因为敲键盘时手腕总是弯着的。于是乎就想买一个符合人体工程学的分体式机械键盘。 结果找了半天都没有比较中意的，找到几个人体工程学键盘，都是薄膜的，而且价格高得离谱，不就多个人体工程学光环嘛。。。身为程序员中的屌丝，岂能被金钱这种东西折腰呢？ 带 “人体工程学光环” 键盘 为了不 ...
So the first thing that the function does is to check the current state of the input. 1. If the input is HIGH then wait for the signal to go LOW. i.e wait until the input is inactive. 2. Next, wait while the input is LOW (waiting for the active state HIGH)....
pinMode(13,OUTPUT);//指示灯Serial.begin(57600); printf_begin(); Serial.println(F("RF24/examples/GettingStarted")); radio.begin(); radio.setPALevel(RF24_PA_MAX); radio.openWritingPipe(pipes); }voidloop() {//Serial.print("role:");//Serial.println(role);if(role){intchk = DHT.read...
pinMode(ledPin, OUTPUT); pinMode(buttonPin, INPUT); }voidloop(){intbuttonState = digitalRead(buttonPin);if(buttonState == HIGH) { digitalWrite(ledPin, HIGH); }else{ digitalWrite(ledPin, LOW); } } 在这个示例中,首先在setup()函数中设置ledPin为输出引脚,buttonPin为输入引脚。然后在loop()函...