You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
5.4 KiB
HTML
92 lines
5.4 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html>
|
|
<head>
|
|
<title>Arduino - SoftwareSerial </title>
|
|
<link rel='stylesheet' href='arduino.css' type='text/css' />
|
|
<meta name="verify-v1" content="TtxFIEJAB6zdJ509wLxjnapQzKAMNm9u0Wj4ho6wxIY=" />
|
|
</head>
|
|
<body>
|
|
<div id="page">
|
|
<!--PageHeaderFmt-->
|
|
<div id="pageheader">
|
|
<div class="title"><a href="http://www.arduino.cc"/>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" style="text-align: right">
|
|
<div style="float: left;">
|
|
<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>
|
|
<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>
|
|
<!--/PageLeftFmt-->
|
|
<div id="pagetext">
|
|
<!--PageText-->
|
|
<div id='wikitext'>
|
|
<p><strong>Reference</strong> <a class='wikilink' href='index.html'>Language</a> (<a class='wikilink' href='Extended.html'>extended</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><span class='wikiword'>SoftwareSerial</span> Library</h2>
|
|
<p>The Arduino hardware has built-in support for serial communication on pins 0 and 1 (which also goes to the computer via the USB connection). The native serial support happens via a piece of hardware (built into the chip) called a <a class='urllink' href='http://en.wikipedia.org/wiki/UART' rel='nofollow'>UART</a>. This hardware allows the Atmega chip to receive serial communication even while working on other tasks, as long as there room in the 64 byte serial buffer.
|
|
</p>
|
|
<p class='vspace'></p><p>The <span class='wikiword'>SoftwareSerial</span> library has been developed to allow serial communication on other digital pins of the Arduino, using software to replicate the functionality (hence the name "<span class='wikiword'>SoftwareSerial</span>").
|
|
</p>
|
|
<p class='vspace'></p><h4>Limitations</h4>
|
|
<p>Because it's not supported by hardware, the library has a few limitations:
|
|
</p>
|
|
<p class='vspace'></p><ul><li>Only speeds up to 9600 baud work
|
|
</li><li>Serial.available() doesn't work
|
|
</li><li>Serial.read() will wait until data arrives
|
|
</li><li>Only data received while Serial.read() is being called will be received. Data received at other times will be lost, since the chip is not "listening".
|
|
</li></ul><p class='vspace'></p><p><span class='wikiword'>SoftwareSerial</span> appears to have some timing issues and/or software issues. Check this forum thread for discussion.
|
|
<a class='urllink' href='http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1176181152' rel='nofollow'>Software Serial Discussion</a>. In particular, if you are having problems using <span class='wikiword'>SoftwareSerial</span> with an Atmega168 chip delete <span class='wikiword'>SoftwareSerial</span>.o in your Arduino directory.
|
|
</p>
|
|
<p class='vspace'></p><h4>Example</h4>
|
|
<pre> <a class='wikilink' href='SoftwareSerialExample.html'>SoftwareSerialExample</a>
|
|
</pre>
|
|
<p class='vspace'></p><h4>Functions</h4>
|
|
<ul><li><a class='wikilink' href='SoftwareSerialConstructor.html'>SoftwareSerial</a>()
|
|
</li><li><a class='wikilink' href='SoftwareSerialBegin.html'>begin</a>()
|
|
</li><li><a class='wikilink' href='SoftwareSerialRead.html'>read</a>()
|
|
</li><li><a class='wikilink' href='SoftwareSerialPrint.html'>print</a>()
|
|
</li><li><a class='wikilink' href='SoftwareSerialPrintln.html'>println</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>
|
|
|
|
</div>
|
|
<!--PageFooterFmt-->
|
|
<div id="pagefooter">
|
|
<a href='#'>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>
|