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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>usb_fill_int_urb</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="The Linux-USB Host Side API" /><link rel="up" href="ch04.html" title="Chapter 4. Host-Side Data Types and Macros" /><link rel="prev" href="re36.html" title="usb_fill_bulk_urb" /><link rel="next" href="re38.html" title="usb_urb_dir_in" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>usb_fill_int_urb</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re36.html">Prev</a> </td><th width="60%" align="center">Chapter 4. Host-Side Data Types and Macros</th><td width="20%" align="right"> <a accesskey="n" href="re38.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="usb_fill_int_urb"><a id="API-usb-fill-int-urb"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>usb_fill_int_urb —
macro to help initialize a interrupt urb
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">void <b class="fsfunc">usb_fill_int_urb </b>(</code></td><td>struct urb * <var class="pdparam">urb</var>, </td></tr><tr><td> </td><td>struct usb_device * <var class="pdparam">dev</var>, </td></tr><tr><td> </td><td>unsigned int <var class="pdparam">pipe</var>, </td></tr><tr><td> </td><td>void * <var class="pdparam">transfer_buffer</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">buffer_length</var>, </td></tr><tr><td> </td><td>usb_complete_t <var class="pdparam">complete_fn</var>, </td></tr><tr><td> </td><td>void * <var class="pdparam">context</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">interval</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id3106705"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>urb</code></em></span></dt><dd><p>
pointer to the urb to initialize.
</p></dd><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p>
pointer to the struct usb_device for this urb.
</p></dd><dt><span class="term"><em class="parameter"><code>pipe</code></em></span></dt><dd><p>
the endpoint pipe
</p></dd><dt><span class="term"><em class="parameter"><code>transfer_buffer</code></em></span></dt><dd><p>
pointer to the transfer buffer
</p></dd><dt><span class="term"><em class="parameter"><code>buffer_length</code></em></span></dt><dd><p>
length of the transfer buffer
</p></dd><dt><span class="term"><em class="parameter"><code>complete_fn</code></em></span></dt><dd><p>
pointer to the usb_complete_t function
</p></dd><dt><span class="term"><em class="parameter"><code>context</code></em></span></dt><dd><p>
what to set the urb context to.
</p></dd><dt><span class="term"><em class="parameter"><code>interval</code></em></span></dt><dd><p>
what to set the urb interval to, encoded like
the endpoint descriptor's bInterval value.
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3106850"></a><h2>Description</h2><p>
Initializes a interrupt urb with the proper information needed to submit
it to a device.
Note that high speed interrupt endpoints use a logarithmic encoding of
the endpoint interval, and express polling intervals in microframes
(eight per millisecond) rather than in frames (one per millisecond).
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re36.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch04.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re38.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>usb_fill_bulk_urb</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>usb_urb_dir_in</span></td></tr></table></div></body></html>
