Arduino

Arduino Day1

2020_10_26

开发设备：Arduino Uno 副板
开发环境：Arduino IDE

基础：

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Arduino的代码类似于C#和Java，有setup()和loop()两部分。
其中：

• setup() 是Arduino程序启动时调用的命令。
  • 如pinMode(13，INPUT)；
• loop()是Arduino程序运行时工作的命令。
  • 如digitalWrite(13，HIGH);

实验：

实验1：Blink点亮小灯

最开始，点亮 Uno 上的 LED 小灯。

/*
  Blink

  Turns an LED on for one second, then off for one second, repeatedly.

  Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO
  it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to
  the correct LED pin independent of which board is used.
  If you want to know what pin the on-board LED is connected to on your Arduino
  model, check the Technical Specs of your board at:
  https://www.arduino.cc/en/Main/Products

  modified 8 May 2014
  by Scott Fitzgerald
  modified 2 Sep 2016
  by Arturo Guadalupi
  modified 8 Sep 2016
  by Colby Newman

  This example code is in the public domain.

  http://www.arduino.cc/en/Tutorial/Blink
*/

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}

思路：
setup()：声明13号接口作为输出，Uno 上的 LED 小灯设计时接在13号数字接口。
loop()：数字接口分别输出高、低电平。