查看Delay(ms)的源代碼

<pre style="color:blue">
void delay (unsigned long ms)   
</pre>

延時(毫秒) <br>

延時, 單位毫秒(1秒有1000毫秒).<br>


警告:<br>
參數(shù)為unsigned long, 因此在延時參數(shù)超過32767(int型最大值)時, 需要用"UL"后綴表示為無符號 長整型, 例如: delay(60000UL);. 同樣在參數(shù)表達式, 切表達式中有int類型時, 需要強制轉(zhuǎn)換為 unsigned long類型, 例如: delay((unsigned long)tdelay * 100UL);.<br>
一下例子設置13引腳對應的LED等以1秒頻率閃爍:<br>
<pre style="color:green">
int ledPin = 13;                 // LED connected to digital pin 13

void setup()
{
  pinMode(ledPin, OUTPUT);      // sets the digital pin as output
}

void loop()
{
  digitalWrite(ledPin, HIGH);   // sets the LED on
  delay(1000);                  // waits for a second
  digitalWrite(ledPin, LOW);    // sets the LED off
  delay(1000);                  // waits for a second
}
</pre>