Arduino程序基础
使用C++编程，基本参考C++语法。
每一句结尾用分号，注释用//，全大写单词是特有字符，不要乱用。函数用{}套起来。
void setup() {
// put your setup code here, to run once:
// 这里的代码在开始的时候运行一次
code doing something; // 每一行代码用分号结尾
}
void loop() {
// put your main code here, to run repeatedly:
// 这里的代码会循环重复运行
}
C++在线学习资料
https://www.bilibili.com/video/BV1et411b73Z
Arduino语句函数库参考
http://www.taichi-maker.com/homepage/reference-index/arduino-code-reference/
https://docs.arduino.cc/language-reference/
示例程序Blink
点亮LED小灯
/*
Blink
Turns an LED on for one second, then off for one second, repeatedly.
打开LED一秒钟，然后关闭一秒钟，重复。
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:
大多数arduino都有一个可以控制的板载LED。
在UNO， MEGA和ZERO上，它连接到数字引脚13，在MKR1000引脚6上。
领导_BUILTIN设置为正确的LED引脚，与使用哪个板无关。
如果您想知道板上LED连接到Arduino模型上的引脚，请查看板的技术规格：
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.
https://www.arduino.cc/en/Tutorial/BuiltInExamples/Blink
*/
// the setup function runs once when you press reset or power the board
// 按复位键或单板上电时，设置功能运行一次
void setup() {
// initialize digital pin LED_BUILTIN as an output.
// 初始化数字引脚LED_BUILTIN作为输出。
pinMode(LED_BUILTIN, OUTPUT);
}
// the loop function runs over and over again forever
// 循环函数会一直运行下去
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level) 打开LED （HIGH是电压等级）
delay(1000); // wait for a second 等一秒 一秒是一千毫秒
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW 通过使电压低来关闭LED
delay(1000); // wait for a second
}
编译好后点击上传
试着修改变量
int delaytime = 3000;
void setup() {
// initialize digital pin LED_BUILTIN as an output.
// 初始化数字引脚LED_BUILTIN作为输出。
pinMode(LED_BUILTIN, OUTPUT);
}
// the loop function runs over and over again forever
// 循环函数会一直运行下去
void loop() {
delaytime = delaytime +1000 // 随着循环递加
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level) 打开LED （HIGH是电压等级）
delay(3000); // wait for 3 second 等一秒 一秒是一千毫秒
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW 通过使电压低来关闭LED
delay(delaytime); // wait for delaytime second
}
pinMode函数和digitalWrite函数
所以原代码也可写为
int delaytime = 100;
int LED_pin = 13;
// On the UNO, MEGA and ZERO it is attached to digital pin 13
// 连接到数字引脚13
void setup() {
// initialize digital pin LED_BUILTIN as an output.
// 初始化数字引脚LED_BUILTIN作为输出。
pinMode(LED_pin, OUTPUT);
}
// the loop function runs over and over again forever
// 循环函数会一直运行下去
void loop() {// 随着循环递加
digitalWrite(LED_pin, 5); // turn the LED on (HIGH is the voltage level) 打开LED （HIGH是电压等级）
delay(delaytime); // wait for 3 second 等一秒 一秒是一千毫秒
digitalWrite(LED_pin, 0); // turn the LED off by making the voltage LOW 通过使电压低来关闭LED
delay(delaytime); // wait for delaytime second
}