arduino-0022
This commit is contained in:
parent
4f99742f03
commit
a9ad0e80a0
803 changed files with 69785 additions and 33024 deletions
193
arduino-0022-linux-x64/reference/DigitalRead.html
Normal file
193
arduino-0022-linux-x64/reference/DigitalRead.html
Normal file
|
@ -0,0 +1,193 @@
|
|||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
|
||||
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||||
<html>
|
||||
<head>
|
||||
<title>Arduino - DigitalRead </title>
|
||||
<link rel="shortcut icon" type="image/x-icon" href="http://arduino.cc/en/favicon.png">
|
||||
<link rel='stylesheet' href='arduinoUno.css' type='text/css' />
|
||||
<!--HeaderText--><style type='text/css'><!--
|
||||
ul, ol, pre, dl, p { margin-top:0px; margin-bottom:0px; }
|
||||
code { white-space: nowrap; }
|
||||
.vspace { margin-top:1.33em; }
|
||||
.indent { margin-left:40px; }
|
||||
.outdent { margin-left:40px; text-indent:-40px; }
|
||||
a.createlinktext { text-decoration:none; border-bottom:1px dotted gray; }
|
||||
a.createlink { text-decoration:none; position:relative; top:-0.5em;
|
||||
font-weight:bold; font-size:smaller; border-bottom:none; }
|
||||
img { border:0px; }
|
||||
|
||||
span.anchor {
|
||||
float: left;
|
||||
font-size: 10px;
|
||||
margin-left: -10px;
|
||||
width: 10px;
|
||||
position:relative; top:-0.1em;
|
||||
text-align: center;
|
||||
}
|
||||
span.anchor a { text-decoration: none; }
|
||||
span.anchor a:hover { text-decoration: underline; }
|
||||
ol.toc { text-indent:-20px; list-style: none; }
|
||||
ol.toc ol.toc { text-indent:-40px; }
|
||||
div.tocfloat { font-size: smaller; margin-bottom: 10px;
|
||||
border-top: 1px dotted #555555; border-bottom: 1px dotted #555555;
|
||||
padding-top: 5px; padding-bottom: 5px;
|
||||
width: 38%; float: right; margin-left: 10px; clear: right;
|
||||
margin-right:-13px; padding-right: 13px; padding-left: 13px;
|
||||
background-color: #eeeeee; }
|
||||
div.toc { font-size: smaller;
|
||||
padding: 5px; border: 1px dotted #cccccc;
|
||||
background: #f7f7f7;
|
||||
margin-bottom: 10px; }
|
||||
div.toc p { background-color: #f9f6d6;
|
||||
margin-top:-5px; padding-top: 5px;
|
||||
margin-left:-5px; padding-left: 5px;
|
||||
margin-right:-5px; padding-right: 5px;
|
||||
padding-bottom: 3px;
|
||||
border-bottom: 1px dotted #cccccc; }.editconflict { color:green;
|
||||
font-style:italic; margin-top:1.33em; margin-bottom:1.33em; }
|
||||
|
||||
table.markup { border: 2px dotted #ccf; width:90%; }
|
||||
td.markup1, td.markup2 { padding-left:10px; padding-right:10px; }
|
||||
td.markup1 { border-bottom: 1px solid #ccf; }
|
||||
div.faq { margin-left:2em; }
|
||||
div.faq p.question { margin: 1em 0 0.75em -2em; font-weight:bold; }
|
||||
div.faq hr { margin-left: -2em; }
|
||||
|
||||
.frame
|
||||
{ border:1px solid #cccccc; padding:4px; background-color:#f9f9f9; }
|
||||
.lfloat { float:left; margin-right:0.5em; }
|
||||
.rfloat { float:right; margin-left:0.5em; }
|
||||
a.varlink { text-decoration:none; }
|
||||
|
||||
--></style><script type="text/javascript">
|
||||
function toggle(obj) {
|
||||
var elstyle = document.getElementById(obj).style;
|
||||
var text = document.getElementById(obj + "tog");
|
||||
if (elstyle.display == 'none') {
|
||||
elstyle.display = 'block';
|
||||
text.innerHTML = "hide";
|
||||
} else {
|
||||
elstyle.display = 'none';
|
||||
text.innerHTML = "show";
|
||||
}
|
||||
}
|
||||
</script> <meta name='robots' content='index,follow' />
|
||||
|
||||
<meta name="verify-v1" content="TtxFIEJAB6zdJ509wLxjnapQzKAMNm9u0Wj4ho6wxIY=" />
|
||||
</head>
|
||||
<body>
|
||||
<div id="page">
|
||||
<!--PageHeaderFmt-->
|
||||
<div id="pageheader">
|
||||
<div class="title"><a href='http://arduino.cc/en'>Arduino</a></div>
|
||||
<div class="search">
|
||||
<!-- SiteSearch Google -->
|
||||
<FORM method=GET action="http://www.google.com/search">
|
||||
<input type=hidden name=ie value=UTF-8>
|
||||
<input type=hidden name=oe value=UTF-8>
|
||||
<INPUT TYPE=text name=q size=25 maxlength=255 value="">
|
||||
<INPUT type=submit name=btnG VALUE="search">
|
||||
<input type=hidden name=domains value="http://www.arduino.cc/">
|
||||
<input type=hidden name=sitesearch value="http://www.arduino.cc/">
|
||||
</FORM>
|
||||
<!-- SiteSearch Google -->
|
||||
</div>
|
||||
</div>
|
||||
<!--/PageHeaderFmt-->
|
||||
<!--PageLeftFmt-->
|
||||
<div id="pagenav">
|
||||
<div id="navbar">
|
||||
<p><a class='wikilink' href='http://arduino.cc/en/Main/Buy'>Buy</a>
|
||||
<a class='wikilink' href='http://arduino.cc/en/Main/Software'>Download</a>
|
||||
<a class='wikilink' href='Guide_index.html'>Getting Started</a>
|
||||
<a class='wikilink' href='http://arduino.cc/en/Tutorial/HomePage'>Learning</a>
|
||||
<a class='wikilink' href='index.html'>Reference</a>
|
||||
<a class='wikilink' href='http://arduino.cc/en/Main/Hardware'>Hardware</a>
|
||||
<a class='wikilink' href='FAQ.html'>FAQ</a>
|
||||
</p>
|
||||
<p class='vspace'></p>
|
||||
|
||||
</div>
|
||||
<div id="navbar_external">
|
||||
<a class="urllink" href="http://www.arduino.cc/blog/" rel="nofollow">Blog »</a><a class="urllink" href="http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl" rel="nofollow">Forum »</a><a class="urllink" href="http://www.arduino.cc/playground/" rel="nofollow">Playground »</a>
|
||||
</div>
|
||||
</div>
|
||||
<!--/PageLeftFmt-->
|
||||
<div id="pagetext">
|
||||
<!--PageText-->
|
||||
<div id='wikitext'>
|
||||
<p><strong>Reference</strong> <a class='wikilink' href='index.html'>Language</a> | <a class='wikilink' href='Libraries.html'>Libraries</a> | <a class='wikilink' href='Comparison.html'>Comparison</a> | <a class='wikilink' href='Changes.html'>Changes</a>
|
||||
</p>
|
||||
<p class='vspace'></p><h2>digitalRead()</h2>
|
||||
<h4>Description</h4>
|
||||
<p>Reads the value from a specified digital pin, either <a class='wikilink' href='Constants.html'>HIGH</a> or <a class='wikilink' href='Constants.html'>LOW</a>.
|
||||
</p>
|
||||
<p class='vspace'></p><h4>Syntax</h4>
|
||||
<p>digitalRead(pin)
|
||||
</p>
|
||||
<p class='vspace'></p><h4>Parameters</h4>
|
||||
<p>pin: the number of the digital pin you want to read (<em>int</em>)
|
||||
</p>
|
||||
<p class='vspace'></p><h4>Returns</h4>
|
||||
<p><a class='wikilink' href='Constants.html'>HIGH</a> or <a class='wikilink' href='Constants.html'>LOW</a>
|
||||
</p>
|
||||
<p class='vspace'></p><h4>Example</h4>
|
||||
<pre>
|
||||
int ledPin = 13; // LED connected to digital pin 13
|
||||
int inPin = 7; // pushbutton connected to digital pin 7
|
||||
int val = 0; // variable to store the read value
|
||||
|
||||
void setup()
|
||||
{
|
||||
pinMode(ledPin, OUTPUT); // sets the digital pin 13 as output
|
||||
pinMode(inPin, INPUT); // sets the digital pin 7 as input
|
||||
}
|
||||
|
||||
void loop()
|
||||
{
|
||||
val = digitalRead(inPin); // read the input pin
|
||||
digitalWrite(ledPin, val); // sets the LED to the button's value
|
||||
}
|
||||
|
||||
</pre>
|
||||
<p class='vspace'></p><p>Sets pin 13 to the same value as the pin 7, which is an input.
|
||||
</p>
|
||||
<p class='vspace'></p><h4>Note</h4>
|
||||
<p>If the pin isn't connected to anything, digitalRead() can return either HIGH or LOW (and this can change randomly).
|
||||
</p>
|
||||
<p class='vspace'></p><p>The analog input pins can be used as digital pins, referred to as A0, A1, etc.
|
||||
</p>
|
||||
<p class='vspace'></p><h4>See also</h4>
|
||||
<ul><li><a class='wikilink' href='PinMode.html'>pinMode</a>()
|
||||
</li><li><a class='wikilink' href='DigitalWrite.html'>digitalWrite</a>()
|
||||
</li><li><a class='wikilink' href='http://arduino.cc/en/Tutorial/DigitalPins'>Tutorial: Digital Pins</a>
|
||||
</li></ul><p class='vspace'></p><p><a class='wikilink' href='index.html'>Reference Home</a>
|
||||
</p>
|
||||
<p class='vspace'></p><p><em>Corrections, suggestions, and new documentation should be posted to the <a class='urllink' href='http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?board=swbugs' rel='nofollow'>Forum</a>.</em>
|
||||
</p>
|
||||
<p class='vspace'></p><p>The text of the Arduino reference is licensed under a
|
||||
<a class='urllink' href='http://creativecommons.org/licenses/by-sa/3.0/' rel='nofollow'>Creative Commons Attribution-ShareAlike 3.0 License</a>. Code samples in the reference are released into the public domain.
|
||||
</p>
|
||||
</div>
|
||||
|
||||
|
||||
<!-- AddThis Button BEGIN -->
|
||||
<script type="text/javascript">var addthis_language = "en";
|
||||
</script>
|
||||
<div class="addthis_container addthis_toolbox addthis_default_style" addthis:url="DigitalRead" addthis:title="Arduino Wiki English">
|
||||
<a href="http://www.addthis.com/bookmark.php?v=250&username=arduinoteam" class="addthis_button_compact">Share</a><span
|
||||
class="addthis_separator">|</span><a class="addthis_button_email"></a><a class="addthis_button_favorites"></a><a class="addthis_button_print"></a><a
|
||||
class="addthis_button_facebook"></a><a class="addthis_button_twitter"></a><script type="text/javascript"
|
||||
src="http://s7.addthis.com/js/250/addthis_widget.js#username=arduinoteam"></script></div>
|
||||
<!-- AddThis Button END -->
|
||||
|
||||
</div>
|
||||
<!--PageFooterFmt-->
|
||||
<div id="pagefooter">
|
||||
©Arduino |
|
||||
<a href=.html'#'>Edit Page</a> | <a href='#'>Page History</a> | <a href='#' target='_blank'>Printable View</a> | <a href='http://arduino.cc/en/Site/AllRecentChanges'>All Recent Site Changes</a>
|
||||
</div>
|
||||
<!--/PageFooterFmt-->
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
Reference in a new issue