Arduino开发之Blink LED

最新推荐文章于 2023-02-02 08:53:30 发布

原创最新推荐文章于 2023-02-02 08:53:30 发布 · 1.2k 阅读

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 环境搭建：

 1. Arduino UNO R3开发板，

 2. Arduino IDE。

 目前最新版是1.8.3。可以在
 https://www.arduino.cc/en/Main/Software下载并安装。

 安装好之后，桌面会有如下图标。

 示例开发：

 1.连接设备。

 本例中我们以DFR0021-R LED为例，基于Arduino Uno R3和Arduino IDE开发。

 DFR0021-R的引脚和Arduino Uno开发板的连接方式如下，

 2. 编码。

 连接好之后，用数据线连接Arduino开发板和电脑。同时打开Arduino IDE。输入下述代码。

 const int ledPin = 6;// the number of the LED pin

 // Variables will change :

 int ledState = LOW; // ledState used to set the LED

 // Generally, you should use "unsigned long" for variables that hold time

 // The value will quickly become too large for an int to store

 unsigned long previousMillis = 0; // will store last time LED was updated

 // constants won't change :

 const long interval = 1000; // interval at which to blink (milliseconds)

 void setup() {

 // set the digital pin as output:

 pinMode(ledPin, OUTPUT);

 Serial.begin(9600); // open serial port, set the baud rate to 9600 bps

}

 void loop() {

 // here is where you'd put code that needs to be running all the time.

 // check to see if it's time to blink the LED; that is, if the

 // difference between the current time and last time you blinked

 // the LED is bigger than the interval at which you want to

 // blink the LED.

 unsigned long currentMillis = millis();

 if (currentMillis - previousMillis >= interval) {

 // save the last time you blinked the LED

 previousMillis = currentMillis;

 // if the LED is off turn it on and vice-versa:

 if (ledState == LOW) {

 ledState = HIGH;

 } else {

 ledState = LOW;

}

 // set the LED with the ledState of the variable:

 Serial.println(ledState);

 digitalWrite(ledPin, ledState);

}

}

 然后保存文件。

 选择Arduino Uno开发板。

 编译上传大到开发板。

 3.运行。

 选择COM口信息，

 然后选择端口监视工具，查看程序运行信息。

 串口监视信息，

 上面的数据就是Red LED 返回当前状态(1表示开，0表示关)。

 整体运行界面：