闪烁的LED灯(LED灯引脚定义)


MWC红色Arduino板(之后的简称Arduino板)上有四个LED灯,分别为LED1~LED4。经过测试,发现其对应的引脚地址为:13,30,31,32.

需要注意:LED1为高电平灯亮,LED2~LED4为低电平灯亮。

pinMode 设置引脚的输入,输出模式;

digitalWrite向指定的数字引脚写入值;

delay延迟,参数的单位为毫秒。

 

int LED1 = 13; // HIGH level signal trigger
int LED2 = 30; // LOW level signal trigger
int LED3 = 31; // LOW level signal trigger
int LED4 = 32; // LOW level signal trigger
void setup() {
  // put your setup code here, to run once:
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  
}

void loop() {
  // put your main code here, to run repeatedly: 
  digitalWrite(LED1, HIGH);
  digitalWrite(LED2, LOW);
  digitalWrite(LED3, LOW);
  digitalWrite(LED4, LOW);
  
  delay(500);
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, HIGH);
  digitalWrite(LED3, HIGH);
  digitalWrite(LED4, HIGH);
  delay(500);
}

 

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