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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>comedi_get_n_ranges</title><link rel="stylesheet" type="text/css" href="comedilib.css"><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Comedi"><link rel="up" href="functionreference.html#idm45927340294992" title="5.4.1.&#160;Core Functions"><link rel="prev" href="func-ref-comedi-get-n-channels.html" title="comedi_get_n_channels"><link rel="next" href="func-ref-comedi-get-n-subdevices.html" title="comedi_get_n_subdevices"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">comedi_get_n_ranges</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="func-ref-comedi-get-n-channels.html">Prev</a>&#160;</td><th width="60%" align="center">5.4.1.&#160;Core Functions</th><td width="20%" align="right">&#160;<a accesskey="n" href="func-ref-comedi-get-n-subdevices.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="func-ref-comedi-get-n-ranges"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>comedi_get_n_ranges &#8212; number of ranges of channel</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><pre class="funcsynopsisinfo">#include &lt;comedilib.h&gt;</pre><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">comedi_get_n_ranges</b>(</code></td><td>comedi_t * <var class="pdparam">device</var>, </td></tr><tr><td>&#160;</td><td>unsigned int <var class="pdparam">subdevice</var>, </td></tr><tr><td>&#160;</td><td>unsigned int <var class="pdparam">channel</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idm45927340604096"></a><h2>
      Description
    </h2><p>
The function <code class="function">comedi_get_n_ranges</code> returns the number
of ranges of the channel <em class="parameter"><code>channel</code></em>
belonging to the subdevice <em class="parameter"><code>subdevice</code></em>
of the comedi device <em class="parameter"><code>device</code></em>.
This function returns <code class="literal">-1</code> on error.
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