<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>serialBegin</title>
<link rel="stylesheet" type="text/css" href="csound.css" />
<link rel="stylesheet" type="text/css" href="syntax-highlighting.css" />
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" />
<link rel="home" href="index.html" title="The Canonical Csound Reference Manual" />
<link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" />
<link rel="prev" href="sensekey.html" title="sensekey" />
<link rel="next" href="serialEnd.html" title="serialEnd" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">serialBegin</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="sensekey.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="serialEnd.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry">
<a id="serialBegin"></a>
<div class="titlepage"></div>
<a id="IndexSerialBegin" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">serialBegin</span>
</h2>
<p>serialBegin —
Open a serial port.
</p>
</div>
<div class="refsect1">
<a id="idm281472892319144"></a>
<h2>Description</h2>
<p>
Open a serial port for arduino.
</p>
</div>
<div class="refsect1">
<a id="idm281472892275928"></a>
<h2>Syntax</h2>
<pre class="synopsis">iPort <span class="command"><strong>serialBegin</strong></span> SPortName [, ibaudRate]</pre>
</div>
<div class="refsect1">
<a id="idm281472892273736"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>SPortName</em></span> -- port name number
</p>
<p>
<span class="emphasis"><em>ibaudrate</em></span> -- serial speed, defaulting to
9600 bps.
</p>
</div>
<div class="refsect1">
<a id="idm281472892271224"></a>
<h2>Examples</h2>
<p>
Here is an example of the serialBegin opcode. It uses the file <a class="ulink" href="examples/serialBegin.csd" target="_top"><em class="citetitle">serialBegin.csd</em></a>.
</p>
<div class="example">
<a id="idm281472892269432"></a>
<p class="title">
<strong>Example 871. Example of the serialBegin opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<div class="refsect1">
<a id="idm281472712681176"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
-n <span class="c1">;;;no output</span>
<span class="c1">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o serialBegin.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">500</span> <span class="c1">; the default krate can be too fast for the arduino to handle</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="kd">instr</span> <span class="nf">1</span>
i<span class="n">Port</span> <span class="nb">serialBegin</span> <span class="s">"/dev/cu.usbmodemfa131"</span><span class="p">,</span> <span class="mi">9600</span> <span class="c1">;connect to the arduino with baudrate = 9600</span>
k<span class="n">Gain</span> <span class="nb">init</span> <span class="mi">16</span> <span class="c1">;read our knob value</span>
k<span class="n">Val</span> <span class="nb">serialRead</span> i<span class="n">Port</span>
<span class="k">if</span> <span class="p">(</span>k<span class="n">Val</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="k">then</span>
k<span class="n">Gain</span> <span class="o">=</span> k<span class="n">Val</span><span class="o">/</span><span class="mi">128</span>
<span class="k">endif</span>
a<span class="n">Sig</span> <span class="nb">in</span> <span class="c1">;get our audio input and get its rms</span>
k<span class="n">Rms</span> <span class="nb">rms</span> a<span class="n">Sig</span><span class="o">*</span>k<span class="n">Gain</span>
k<span class="n">Rms</span> <span class="o">=</span> k<span class="n">Rms</span><span class="o">*</span>k<span class="n">Rms</span><span class="o">*</span><span class="mi">255</span> <span class="c1">;scale the rms to a good value for the LED and send it out</span>
<span class="nb">serialWrite</span> i<span class="n">Port</span><span class="p">,</span> <span class="p">(</span>k<span class="n">Rms</span> <span class="o"><</span> <span class="mi">255</span> <span class="p">?</span> k<span class="n">Rms</span> <span class="p">:</span> <span class="mi">255</span><span class="p">)</span> <span class="c1">;must be in range: 0-255</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">f</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">1024</span> <span class="mi">10</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mi">1</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">200</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
This is the matching Arduino code :
</p>
<pre class="screen">
void setup() {
// enable serial communication
Serial.begin(9600);
// declare pin 9 to be an output:
pinMode(9, OUTPUT);
}
void loop() {
// only do something if we received something (this should be at csound's k-rate)
if (Serial.available()) {
// set the brightness of LED (connected to pin 9) to our input value
int brightness = Serial.read();
analogWrite(9, brightness);
// while we are here, get our knob value and send it to csound
int sensorValue = analogRead(A0);
Serial.write(sensorValue/4); // scale to 1-byte range (0-255)
}
}
.....</pre>
<p>
</p>
</div>
<div class="refsect1">
<a id="idm281472892263944"></a>
<h2>See Also</h2>
<p>
<a class="link" href="serialEnd.html" title="serialEnd"><em class="citetitle"></em>serialEnd</a>,
<a class="link" href="serialWrite_i.html" title="serialWrite_i"><em class="citetitle"></em>serialWrite_i</a>,
<a class="link" href="serialWrite.html" title="serialWrite"><em class="citetitle"></em>serialWrite</a>,
<a class="link" href="serialRead.html" title="serialRead"><em class="citetitle"></em>serialRead</a>,
<a class="link" href="serialPrint.html" title="serialPrint"><em class="citetitle"></em>serialPrint</a>,
<a class="link" href="serialFlush.html" title="serialFlush"><em class="citetitle"></em>serialFlush</a>.
</p>
</div>
<div class="refsect1">
<a id="idm281472892256168"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Matt Ingalls</td>
</tr>
<tr>
<td>2011</td>
</tr>
</table>
<p>
</p>
<p>New in version 5.14</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="sensekey.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="OpcodesTop.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="serialEnd.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">sensekey </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> serialEnd</td>
</tr>
</table>
</div>
</body>
</html>
distrib
>
Mageia
>
7
>
armv7hl
>
media
>
core-release
>
by-pkgid
>
5fcfcb7517038d1f44ab4e478e6e61fa
>
files
>
2872
