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7<title>ReadSio</title>
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9  <body>
10<h1><CODE>CDEVHIO::ReadSio</CODE> Member Function</h1>
11<h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">#include &lt;kmc/hio/CDevHIO.h&gt;
14
15int ReadSio(
16     int ch,
17     void * buf,
18     int length,
19     int attr
20);
21</pre>
22    </div>
23<h2>Arguments</h2>
24    <div class="section">
25      <table class="arguments">
26        <thead>
27          <tr>
28            <td width="15" />
29<th>Name</th>
30<td>Description</td>
31          </tr>
32        </thead>
33        <tr>
34<td>in</td>
35<th>ch</th>
36<td>Channel number (from <CODE>0</CODE> to <CODE>DEVHIO_COMM_MAX_CHANNEL-1</CODE>).</td>
37        </tr>
38        <tr>
39<td>out</td>
40<th>buf</th>
41<td>Receive buffer.<br /></td>
42        </tr>
43        <tr>
44<td>in</td>
45<th>length</th>
46<td>Length of the data to receive.<br /></td>
47        </tr>
48        <tr>
49<td>in</td>
50<th>attr</th>
51<td>Specifying <CODE>DEVHIO_SIO_ATTR_NONE</CODE> causes the function to block until either the specified amount of data is received or the device disconnects.<br />Specifying <CODE>DEVHIO_SIO_ATTR_NOWAIT</CODE> causes the operation to return immediately without blocking.</td>
52        </tr> </table>
53    </div>
54<h2>Return Values</h2>
55<div class="section">Negative value: Error.<br />Zero or greater: Received data. </div>
56<h2>Description</h2>
57    <div class="section">
58<p>Receives data via serial communication.</p><!-- write here --></div>
59<h2>Revision History</h2>
60    <div class="section">
61      <dl class="history">
62        <dt>2010/11/10</dt>
63<dd>Initial version.<br />
64        </dd>
65      </dl>
66    </div>
67  <hr><p>CONFIDENTIAL</p></body>
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