http://gharee.com/wiki/index.php?action=history&feed=atom&title=DigitalRead%28%29 2025-06-28T15:59:25Z 本wiki的該頁面的版本歷史 MediaWiki 1.21.2 http://gharee.com/wiki/index.php?title=DigitalRead()&diff=85&oldid=prev 2014-09-12T06:17:57Z

<p>以“&lt;pre style=&quot;color:blue&quot;&gt; int digitalRead (uint8_t pin) &lt;/pre&gt; 讀數(shù)字引腳&lt;br&gt; 讀數(shù)字引腳, 返回引腳的高低電平. 在讀引腳之前, 需要將引...”為內(nèi)容創(chuàng)建頁面</p> <p><b>新頁面</b></p><div>&lt;pre style=&quot;color:blue&quot;&gt;<br /> int digitalRead (uint8_t pin) <br /> &lt;/pre&gt;<br /> 讀數(shù)字引腳&lt;br&gt;<br /> <br /> 讀數(shù)字引腳, 返回引腳的高低電平. 在讀引腳之前, 需要將引腳設置為INPUT模式.&lt;br&gt;<br /> <br /> 參數(shù):&lt;br&gt;<br /> *pin 引腳編號<br /> <br /> 返回:&lt;br&gt;<br /> HIGH或LOW<br /> <br /> &lt;pre style=&quot;color:green&quot;&gt;<br /> int ledPin = 13; // LED connected to digital pin 13<br /> int inPin = 7; // pushbutton connected to digital pin 7<br /> int val = 0; // variable to store the read value<br /> <br /> void setup()<br /> {<br /> pinMode(ledPin, OUTPUT); // sets the digital pin 13 as output<br /> pinMode(inPin, INPUT); // sets the digital pin 7 as input<br /> }<br /> <br /> void loop()<br /> {<br /> val = digitalRead(inPin); // read the input pin<br /> digitalWrite(ledPin, val); // sets the LED to the button's value<br /> }<br /> &lt;/pre&gt;<br /> 注解:&lt;br&gt;<br /> 如果引腳沒有鏈接到任何地方, 那么將隨機返回 HIGH 或 LOW.</div>

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