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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>4.4. Instruction for internal triggering</title><link rel="stylesheet" type="text/css" href="comedilib.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><link rel="home" href="index.html" title="Comedi"><link rel="up" href="acquisitionfunctions.html" title="4. Acquisition and configuration functions"><link rel="prev" href="instructionsconfiguration.html" title="4.3. Instructions for configuration"><link rel="next" href="commandsstreaming.html" title="4.5. Commands for streaming acquisition"></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">4.4.
Instruction for internal triggering
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Acquisition and configuration functions
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Instruction for internal triggering
</h3></div></div></div><p>
This special instruction has
<a name="insn-inttrig"></a><code class="constant">INSN_INTTRIG</code> as the
<em class="structfield"><code><a class="link" href="instructions.html#insn-data-structure-insn">insn</a></code></em>
member in its
<a class="link" href="instructions.html#insn-data-structure">instruction data structure</a>.
Its execution causes an
<a class="link" href="commandsstreaming.html#trig-int-start-src">internal triggering event</a>. This
event can, for example, cause the device driver to start a conversion,
or to stop an ongoing acquisition. The exact meaning of the triggering
depends on the card and its particular driver.
</p><p>
The
<em class="structfield"><code><a class="link" href="instructions.html#insn-data-structure-data">data</a></code></em>[0] element of the
<code class="constant">INSN_INTTRIG</code> instruction is reserved for future use,
and should be set to <code class="literal">0</code>.
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Instructions for configuration
</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 4.5.
Commands for streaming acquisition
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