setup函数只能在Arduino板的每次上电或复位后运行一次。 INPUT- - OUTPUT- - RETURN- - Void Loop ( ) { } PURPOSE- 在创建了用于初始化并设置初始值的setup()函数后,loop()函数,正如它的名称所指,允许你的程序连续循环的更改和响应。可以使用它来主动控制Arduino板。 INPUT- - OUTPUT
What you have just learned inChapter 4are the most elementary operations we can do in Arduino: controlling digital output and reading digital input. If Arduino were some sort of human language, those would be two letters of its alphabet. Considering that there are just five letters in this al...
#include <Arduino.h> int led = LED_BUILTIN; //在RPI Pico中 LED_BUILTIN=25 int btn = 1; void setup() { // put your setup code here, to run once: pinMode(led, OUTPUT); pinMode(btn,INPUT_PULLUP);//配置为上拉输入 } void loop() { digitalWrite(led,digitalRead(btn)); } 因为...
HIGH、LOW 表示读写数字IO脚的值 INPUT、OUTPUT 表示数字IO脚的方向 true、false 数字IO pinMode() pinMode(pin,mode); pin:0-13 mode:INPUT / OUTPUT 返回None digitalWrite() digitalWrite(pin,Value); Value:HIGH / LOW 返回None digitalRead() digitalRead(pin,Value); Value:HIGH / LOW eg: 1 int le...
Rotary编码器有三个输出引脚,对于Arduino来说,它们都是INPUT引脚。这三个引脚分别是开关(Switch)、输出A(Output A)和输出B(Output B)。这些引脚使用pinMode函数声明为Input,如下所示。 1 2 3 4 //pin Mode declaration pinMode (Encoder_OuputA, INPUT); pinMode (Encoder_OuputB, INPUT); pinMode (Encoder...
对于Arduino，用pinMode将IO口设为INPUT的时候，其实IO的状态为浮空输入，浮空输入也称高阻输入，也就是...
9.6&=(compoundbitwiseand) 9.8|=(compoundbitwiseor) 变量部分 十、常量 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 integerconstants(整数常量) 10.5 floating point constants(浮点常量) ...
void setup() { // initialize digital pin PC13 as an output. pinMode(PC13, OUTPUT);}// the loop function runs over and over again forevervoid loop() { digitalWrite(PC13, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second digital...
(p){pinMode(pin,OUTPUT);digitalWrite(pin,state);}LED::~LED(){disattach();}voidLED::on(){digitalWrite(pin,HIGH);}voidLED::off(){digitalWrite(pin,LOW);}boolLED::getState(){returndigitalRead(pin);}voidLED::disattach()//引脚回收,恢复到上电状态{digitalWrite(pin,LOW);pinMode(pin,INPUT)...
//configure pin2 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 ...