查看“实验四：按键控制LED实验”的源代码

[[Basic Experiment Kits For Arduino|首页]]
== Arduino ==
=== 实验现象 ===
*按下按键S1，板载LED灯亮起；松开按键，LED熄灭

=== 电路连接 ===
*[[File:实验四：按键控制LED实验_接线.png|400px]]

=== 参考程序 ===
*模块内含下拉电阻，故检测按键是否按下即检测高电平
<pre>
int Led=13;                             //定义LED 接口
int KEY=3;                              //定义按键开关传感器接口

void setup()
{
  pinMode(Led,OUTPUT);                  //定义LED为输出接口
  pinMode(KEY,INPUT);
  digitalWrite(Led,LOW);
}
void loop()
{
  if( digitalRead(KEY) == HIGH )        //查看按键是否按下  
  {
    delay(20);                          //延时20ms，去抖动  
    if( digitalRead(KEY) == HIGH )      //查看按键是否按下
    {
      digitalWrite(Led,HIGH);
      while(digitalRead(KEY) == HIGH);  //松手检测
    }
  }
  else  
    digitalWrite(Led,LOW);
}
</pre>

== 树莓派 ==
=== 实验现象 ===
*
=== 电路连接 ===
*
=== 程序运行 ===
==== C语言 ====
==== Python ====

=== 例程下载 ===

== 相关例程 ==
{{Arduino and Raspberry Pi Case}}