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<title>About the NetX Duo User Guide</title>
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</head>
<body class="article">
<div id="header">
<h1>About the NetX Duo User Guide</h1>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>This guide contains comprehensive information about NetX Duo, the Eclipse Foundation high-performance IPv4/IPv6 dual network stack.</p>
</div>
<div class="paragraph">
<p>It is intended for embedded real-time software developers familiar with basic networking concepts, ThreadX, and the C programming language.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_organization">Organization</h2>
<div class="sectionbody">
<div class="ulist">
<ul>
<li>
<p><a href="chapter1.html">Chapter 1</a> - Introduces NetX Duo</p>
</li>
<li>
<p><a href="chapter2.html">Chapter 2</a> - Gives the basic steps to install and use NetX Duo with your ThreadX application</p>
</li>
<li>
<p><a href="chapter3.html">Chapter 3</a> - Provides a functional overview of the NetX Duo system and basic information about the TCP/IP networking standards</p>
</li>
<li>
<p><a href="chapter4.html">Chapter 4</a> - Details the application’s interface to NetX Duo</p>
</li>
<li>
<p><a href="chapter5.html">Chapter 5</a> - Describes network drivers for NetX Duo</p>
</li>
<li>
<p><a href="appendix-a.html">Appendix A</a> - NetX Duo Services</p>
</li>
<li>
<p><a href="appendix-b.html">Appendix B</a> - NetX Duo Constants</p>
</li>
<li>
<p><a href="appendix-c.html">Appendix C</a> - NetX Duo Data Types</p>
</li>
<li>
<p><a href="appendix-d.html">Appendix D</a> - BSD-Compatible Socket API</p>
</li>
<li>
<p><a href="appendix-e.html">Appendix E</a> - ASCII Chart</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_guide_conventions">Guide Conventions</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Italics - Typeface denotes book titles, emphasizes important words, and indicates variables.</p>
</div>
<div class="paragraph">
<p><strong>Boldface</strong> - Typeface denotes file names, key words, and further emphasizes important words and variables.</p>
</div>
<div class="admonitionblock important">
<table>
<tr>
<td class="icon">
<div class="title">Important</div>
</td>
<td class="content">
Information symbols draw attention to important or additional information that could affect performance or function.
</td>
</tr>
</table>
</div>
<div class="admonitionblock warning">
<table>
<tr>
<td class="icon">
<div class="title">Warning</div>
</td>
<td class="content">
Warning symbols draw attention to situations that developers should avoid because they could cause fatal errors.
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_netx_duo_data_types">NetX Duo Data Types</h2>
<div class="sectionbody">
<div class="paragraph">
<p>In addition to the custom NetX Duo control structure data types, there are several special data types that are used in NetX Duo service call interfaces. These special data types map directly to data types of the underlying C compiler. This is done to ensure portability between different C compilers. The exact implementation is inherited from ThreadX and can be found in the <strong><em>tx_port.h</em></strong> file included in the ThreadX distribution.</p>
</div>
<div class="paragraph">
<p>The following is a list of NetX Duo service call data types and their associated meanings:</p>
</div>
<div class="paragraph">
<p><strong>UINT</strong>: Basic unsigned integer. This type must support 32-bit unsigned data; however, it is mapped to the most convenient unsigned data type.<br>
<strong>ULONG</strong>: Unsigned long type. This type must support 32-bit unsigned data.
<strong>VOID</strong>: Almost always equivalent to the compiler’s void type.<br>
<strong>CHAR</strong>: Most often a standard 8-bit character type.</p>
</div>
<div class="paragraph">
<p>Additional data types are used within the NetX Duo source. They are located in either the <strong><em>tx_port.h</em></strong> or <strong><em>nx_port.h</em></strong> files.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_troubleshooting">Troubleshooting</h2>
<div class="sectionbody">
<div class="paragraph">
<p>For troubleshooting, be sure to collect the following information:</p>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>A detailed description of the problem, including frequency of occurrence and whether it can be reliably reproduced.</p>
</li>
<li>
<p>A detailed description of any changes to the application and/or NetX Duo that preceded the problem.</p>
</li>
<li>
<p>The contents of the _tx_version_id and
_nx_version_id strings found in the tx_port.h and nx_port.h files of your distribution. These strings provide valuable information regarding your run-time environment.</p>
</li>
<li>
<p>The contents in RAM of the following ULONG variables:</p>
<div class="paragraph">
<p><strong>_tx_build_options</strong></p>
</div>
<div class="paragraph">
<p><strong>_nx_system_build_options1</strong></p>
</div>
<div class="paragraph">
<p><strong>_nx_system_build_options2</strong></p>
</div>
<div class="paragraph">
<p><strong>_nx_system_build_options3</strong></p>
</div>
<div class="paragraph">
<p><strong>_nx_system_build_options4</strong></p>
</div>
<div class="paragraph">
<p><strong>_nx_system_build_options5</strong></p>
</div>
<div class="paragraph">
<p>These variables give information on how your ThreadX and NetX Duo libraries were built.</p>
</div>
</li>
<li>
<p>A trace buffer captured immediately after the problem was detected. This is accomplished by building the ThreadX and NetX Duo libraries with TX_ENABLE_EVENT_TRACE and calling tx_trace_enable with the trace buffer information.</p>
</li>
</ol>
</div>
</div>
</div>
</div>
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<div id="footer-text">
Last updated 2025-02-07 08:25:21 UTC
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