7afd92fcd4
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1778 42af7a65-404d-4744-a932-0658087f49c3
1517 lines
42 KiB
HTML
1517 lines
42 KiB
HTML
<html>
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<head>
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<title>NuttX</title>
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</head>
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<body background="backgd.gif">
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<hr><hr>
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<table width ="100%">
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<tr align="center" bgcolor="#e4e4e4">
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<td>
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<h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
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<p>Last Updated: May 9, 2009</p>
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<hr><hr>
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<table width ="100%">
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<tr bgcolor="#e4e4e4">
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<td>
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<h1>Table of Contents</h1>
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</table>
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<center><table width ="80%">
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<table>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#overview">Overview</a>.<br>
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What is NuttX? Look at all those files and features... How can it be a tiny OS?
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</tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#downloads">Downloads</a>.<br>
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Where can I get NuttX? What is the current development status?
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#platforms">Supported Platforms</a>.<br>
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What target platforms has NuttX been ported to?
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#environments">Development Environments</a>.<br>
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What kinds of host cross-development platforms can be used with NuttX?
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</td>
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</tr>
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<tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#footprint">Memory Footprint</a>.<br>
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Just how big is it? Do I have enough memory to use NuttX?
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#licensing">Licensing</a>.<br>
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Are there any licensing restrictions for the use of NuttX? (Almost none)
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Will there be problems if I link my proprietary code with NuttX? (No)
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</td>
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</tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#history">Release History</a><br>
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What has changed in the last release of NuttX?
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What unreleased changes are pending in CVS?
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</td>
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</tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#TODO">Bugs, Issues, <i>Things-To-Do</i></a>.<br>
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Software is never finished nor ever tested well enough.
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(Do you want to help develop NuttX? If so, send me an email).
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</td>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#documentation">Other Documentation</a>.<br>
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What other NuttX documentation is available?
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</td>
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</tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#trademarks">Trademarks</a>.<br>
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Some of the words used in this document belong to other people.
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</tr>
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</table>
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</td>
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</tr>
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</table></center>
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<table width ="100%">
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<tr bgcolor="#e4e4e4">
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<td>
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<a name="overview"><h1>Overview</h1></a>
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</td>
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</tr>
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</table>
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<p>
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<b>Goals</b>.
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Nuttx is a real timed embedded operating system (RTOS).
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Its goals are:
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<p>
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<center><table width="90%">
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>Small Footprint</b>
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<td><br></td>
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<td>
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<p>
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Usable in all but the tightest micro-controller environments,
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The focus is on the tiny-to-small, deeply embedded environment.
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</p>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>Rich Feature OS Set</b>
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</td>
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</tr>
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<td><br></td>
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<td>
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<p>
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The goal is to provide implementations of most standard POSIX OS interfaces
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to support a rich, multi-threaded development environment for deeply embedded
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processors.
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</p>
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NON-GOALS: (1) It is not a goal to provide the rich level of OS
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features like those provided with Linux.
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Small footprint is more important than features.
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Standard compliance is more important than small footprint.
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(2) There is no MMU-based support for processes.
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At present, NuttX assumes a flat address space.
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</p>
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</tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>Highly Scalable</b>
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</td>
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<td><br></td>
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<td>
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<p>
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Fully scalable from tiny (8-bit) to moderate embedded (32-bit).
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Scalability with rich feature set is accomplished with:
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Many tiny source files, link from static libraries, highly configurable, use of
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weak symbols when available.
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</p>
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</tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>Standards Compliance</b>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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NuttX strives to achieve a high degree of standards compliance.
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The primary governing standards are POSIX and ANSI standards.
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Additional standard APIs from Unix and other common RTOS's are
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adopted for functionality not available under these standards
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or for functionality that is not appropriate for the deeply-embedded
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RTOS (such as <code>fork()</code>).
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</p>
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<p>
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Because of this standards conformance, software developed under other
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standard OSs (such as Linux) should port easily to NuttX.
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</p>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>Real-Time</b>
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<td><br></td>
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<td>
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<p>
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Fully pre-emptible, fixed priority and round-robin scheduling.
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</p>
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</tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>Totally Open</b>
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<td><br></td>
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<td>
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<p>
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Non-restrictive BSD license.
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</p>
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</tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>GNU Toolchains</b>
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</td>
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<td><br></td>
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<td>
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<p>
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Compatible GNU toolchains based on <a href="http://buildroot.uclibc.org/">buildroot</a>
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available for
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<a href="https://sourceforge.net/project/showfiles.php?group_id=189573&package_id=224585">download</a>
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to provide a complete development environment for many architectures.
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</p>
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</tr>
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</table></center>
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<p>
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<b>Feature Set</b>.
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Key features of NuttX include:
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<p>
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<center><table width="90%">
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<tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>Standards Compliant Core Task Management</b>
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</td>
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<td><br></td>
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<td>
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<p>
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<li>Modular, micro-kernel</li>
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</p>
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<td><br></td>
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<td>
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<p>
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<li>Fully pre-emptible.</li>
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</p>
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<td><br></td>
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<td>
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<p>
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<li>Naturally scalable.</li>
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</p>
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<td><br></td>
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<p>
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<li>Highly configurable.</li>
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</p>
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</tr>
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<td><br></td>
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<td>
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<p>
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<li>Easily extensible to new processor architectures, SoC architecture, or board architectures.
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A <a href="NuttxPortingGuide.html">Porting Guide</a> is in development.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>FIFO and round-robin scheduling.</li>
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</p>
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</tr>
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<td><br></td>
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<td>
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<p>
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<li>Realtime, deterministic, with support for priority inheritance</li>
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</p>
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</tr>
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<td><br></td>
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<td>
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<p>
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<li>POSIX/ANSI-like task controls, named message queues, counting semaphores, clocks/timers, signals, pthreads, environment variables, filesystem.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>VxWorks-like task management and watchdog timers.</li>
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</p>
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</tr>
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<td><br></td>
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<td>
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<p>
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<li>BSD socket interface.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>Extensions to manage pre-emption.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>Well documented in the NuttX <a href="NuttxUserGuide.html">User Guide</a>.</li>
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</p>
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</tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>File system</b>
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</td>
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<td><br></td>
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<td>
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<p>
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<li>Tiny in-memory, root pseudo-file-system.</li>
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</p>
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</tr>
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<td><br></td>
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<td>
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<p>
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<li>Supports character and block drivers.</li>
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</p>
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</tr>
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<td><br></td>
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<td>
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<p>
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<li>Network, USB (device), serial, CAN, driver architecture.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>RAMDISK, pipes, FIFO, <code>/dev/null</code>, <code>/dev/zero</code> drivers.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>Mount-able volumes. Bind mountpoint, filesystem, and block device driver.</li>
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</p>
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</tr>
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<td><br></td>
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<td>
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<p>
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<li>FAT12/16/32 filesystem support.</li>
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</p>
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</tr>
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<td><br></td>
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<td>
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<p>
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<li>Generic driver for SPI-based MMC/SD cards.</li>
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</p>
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</tr>
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<td><br></td>
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<td>
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<p>
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<li>ROMFS filesystem support.</li>
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</p>
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</tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>C Library</b>
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</td>
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<td><br></td>
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<td>
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<p>
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<li>Fully integrated into the OS.</li>
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</p>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>Networking</b>
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</td>
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<td><br></td>
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<td>
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<p>
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<li>TCP/IP, UDP, ICMP stacks.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>Small footprint (based on uIP).</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>BSD compatible socket layer.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>Networking utilities (DHCP, SMTP, TELNET, TFTP, HTTP)</li>
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</p>
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</tr>
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<tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>USB Device Support</b>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li><i>Gadget</i>-like architecture for USB device controller drivers and device-dependent USB class drivers.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>USB device controller drivers available for the NXP LPC214x and TI DM320.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>Device-dependent USB class drivers available for USB serial and for USB mass storage.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>Built-in USB trace functionality for USB debug.</li>
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</p>
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</tr>
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<tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>Graphics Support</b>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>Framebuffer drivers.</li>
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</p>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>
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NX: A graphics library, tiny windowing system and tiny font support.
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Documented in the <a href="NXGraphicsSubsystem.html">NX Graphics Subsystem</a>
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manual.
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</li>
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</p>
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</tr>
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</table></center>
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<p>
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<b>NuttX Add-Ons</b>.
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The following packages are available to extend the basic NuttX feature set:
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</p>
|
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<center><table width="90%">
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<tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td bgcolor="#5eaee1">
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<b>NuttShell (NSH)</b>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<p>
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<li>A small, scalable, bash-like shell for NuttX with rich feature set and small footprint.
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See the <a href="NuttShell.html">NuttShell User Guide</a>.</li>
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</p>
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</tr>
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<tr>
|
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Pascal Compiler with NuttX runtime P-Code interpreter add-on</b>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<li>The Pascal add-on is available for download from the
|
|
<a href="http://sourceforge.net/project/showfiles.php?group_id=189573">SourceForge</a>
|
|
website.</li>
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
</table></center>
|
|
|
|
<p>
|
|
<b>Look at all those files and features... How can it be a tiny OS?</b>.
|
|
The NuttX feature list (above) is fairly long and if you look at the NuttX
|
|
source tree, you will see that there are hundreds of source files comprising
|
|
NuttX. How can NuttX be a tiny OS with all of that?
|
|
</p>
|
|
<center><table width="90%">
|
|
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Lots of Features -- More can be smaller!</b>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
The philosophy behind that NuttX is that lots of features are great... <i>BUT</i>
|
|
also that if you don't use those features, then you should not have to pay a penalty
|
|
for the unused features.
|
|
And, with NuttX, you don't! If you don't use a feature, it will not
|
|
be included in the final executable binary.
|
|
You only have to pay the penalty of increased footprint for the features
|
|
that you actually use.
|
|
</p>
|
|
<p>
|
|
Using a variety of technologies, NuttX can scale from the very tiny to
|
|
the moderate-size system. I have executed NuttX with some simple applications
|
|
in as little as 32Kb <i>total</i> memory (code and data).
|
|
On the other hand, typical, richly featured NuttX builds require more like 64Kb
|
|
(and if all of the features are used, this can push 100Kb).
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Many, many files -- More really is smaller!</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
One may be intimidated by the size NuttX source tree. There are hundreds of source files!
|
|
How can that be a tiny OS?
|
|
Actually, the large number of files is one of the tricks to keep NuttX small and
|
|
as scalable as possible.
|
|
Most files contain only a single function.
|
|
Sometimes just one tiny function with only a few lines of code.
|
|
Why?
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<b>Static Libraries</b>.
|
|
Because in the NuttX build processed, objects are compiled and saved into
|
|
<i>static libraries</i> (<i>archives</i>).
|
|
Then, when the file executable is linked, only the object files that are needed
|
|
are extracted from the archive and added to the final executable.
|
|
By having many, many tiny source files, you can assure that no code that you do
|
|
not execute is ever included in the link.
|
|
And by having many, tiny source files you have better granularity --
|
|
if you don't use that tiny function of even just a few lines of code, it will
|
|
not be included in the binary.
|
|
</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Other Tricks</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
As mentioned above, the use of many, tiny source files and linking from static
|
|
libraries keeps the size of NuttX down.
|
|
Other tricks used in NuttX include:
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<b>Configuration Files</b>.
|
|
Before you build NuttX, you must provide a configuration file that specifies
|
|
what features you plan to use and which features you do not.
|
|
This configuration file contains a long list of settings that control
|
|
what is built into NuttX and what is not.
|
|
There are hundreds of such settings
|
|
(see the <a href="NuttxPortingGuide.html#apndxconfigs">NuttX Porting Guide</a>
|
|
for a partial list that excludes platform specific settings).
|
|
These many, many configuration options allow NuttX to be highly tuned to
|
|
meet size requirements.
|
|
The downside to all of these configuration options is that it greatly
|
|
complicates the maintenance of NuttX -- but that is my problem, not yours.
|
|
</li>
|
|
<li>
|
|
<b>Weak Symbols</b>
|
|
The GNU toolchain supports <i>weak</i> symbols and these also help to keep
|
|
the size of NuttX down.
|
|
Weak symbols prevent object files from being drawn into the link even if they
|
|
are accessed from source code.
|
|
Careful use of weak symbols is another trick for keep unused code out of the
|
|
final binary.
|
|
</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
|
|
</table></center>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="downloads"><h1>Downloads</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>nuttx-0.4.5</b>.
|
|
The 37<sup>th</sup> release of NuttX (nuttx-0.4.5) is available for download
|
|
from the <a href="http://sourceforge.net/project/showfiles.php?group_id=189573">SourceForge</a>
|
|
website.
|
|
The change log associated with the release is available <a href="#currentrelease">here</a>.
|
|
Unreleased changes after this release are available in CVS.
|
|
These unreleased changes are listed <a href="#pendingchanges">here</a>.
|
|
</p>
|
|
<p>
|
|
This release focuses on a few new features.
|
|
<ul>
|
|
<li>
|
|
The basic port for the FreeScale ARM920T i.MX1 processor on the
|
|
Freescale MX1ADS board. Coding is complete for this port, but it is
|
|
has not yet fully integrated.
|
|
</li>
|
|
<li>
|
|
Extended I2C and SPI interface definitions
|
|
</li>
|
|
<li>
|
|
Add basic support for C++ applications. Very simple C++ applications
|
|
can now be built against NuttX without any external libraries. At
|
|
present, only the most primitive C++ programs are supported, but it
|
|
is hoped that this support will be extended in future releases.
|
|
</li>
|
|
</ul>
|
|
</p>
|
|
<p>
|
|
See the Changelog for a detailed description of these changes.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="platforms"><h1>Supported Platforms</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<center><table width="90%">
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Linux User Mode</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
A user-mode port of NuttX to the x86 Linux/Cygwin platform is available.
|
|
The purpose of this port is primarily to support OS feature development.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
Does not support interrupts but is otherwise fully functional.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>ARM7TDMI</b>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>TI TMS320C5471</b> (also called <b>C5471</b> or <b>TMS320DA180</b> or <b>DA180</b>).
|
|
NuttX operates on the ARM7 of this dual core processor.
|
|
This port uses the <a href="http://www.spectrumdigital.com/">Spectrum Digital</a>
|
|
evaluation board with a GNU arm-elf toolchain* under Linux or Cygwin.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
This port is complete, verified, and included in the initial NuttX release.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td><hr></td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>NXP LPC214x</b>.
|
|
Support is provided for the NXP LPC214x family of processors. In particular,
|
|
support is provided for the mcu123.com lpc214x evaluation board (LPC2148).
|
|
This port also used the GNU arm-elf toolchain* under Linux or Cygwin.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
This port boots and passes the OS test (examples/ostest).
|
|
The port is complete and verified. As of NuttX 0.3.17, the port includes:
|
|
timer interrupts, serial console, USB driver, and SPI-based MMC/SD card
|
|
support. A verified NuttShell (NSH) configuration is also available.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td><hr></td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>STMicro STR71x</b>.
|
|
Support is provided for the STMicro STR71x family of processors. In particular,
|
|
support is provided for the Olimex STR-P711 evaluation board.
|
|
This port also used the GNU arm-elf toolchain* under Linux or Cygwin.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
Coding is complete on the basic port (boot logic, system time, serial console),
|
|
but no testing has been performed due to some problems I am having with my
|
|
JTAG wiggler and OpenOCD on Linux.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>ARM920T</b>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>Freescale MC9328MX1</b> or <b>i.MX1</b>.
|
|
This port uses the Freescale MX1ADS development board with a GNU arm-elf toolchain*
|
|
under either Linux or Cygwin.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
This port is in progress. Coding is complete on the basic port (timer, serial console, SPI).
|
|
Verified support for the i.MX1 will be announced in a future release of NuttX (work has
|
|
been temporarily stopped to support the Luminary LM3S6918).
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>ARM926EJS</b>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>TI TMS320DM320</b> (also called <b>DM320</b>).
|
|
NuttX operates on the ARM9 of this dual core processor.
|
|
This port uses the
|
|
<a href="http://wiki.neurostechnology.com/index.php/Developer_Welcome">Neuros OSD</a>
|
|
with a GNU arm-elf toolchain* under Linux or Cygwin.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
The basic port (timer interrupts, serial ports, network, framebuffer, etc.) is complete.
|
|
All implemented features have been verified with the exception of the USB device-side
|
|
driver; that implementation is complete but untested.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>ARM Cortex-M3</b>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>Luminary LM3S6918</b>.
|
|
This port uses theMicromint Eagle-10 development board with a GNU arm-elf toolchain*
|
|
under either Linux or Cygwin.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
This port is in progress. Coding is complete on the basic port (timer, serial console, SPI).
|
|
Verified support for the Cortex-M3 will be announced in a future release of NuttX.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>8052 Microcontroller</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>PJRC 87C52 Development Board</b>.
|
|
This port uses the <a href="http://www.pjrc.com/">PJRC</a> 87C52 development system
|
|
and the <a href="http://sdcc.sourceforge.net/">SDCC</a> toolchain under Linux or Cygwin.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
This port is complete but not stable with timer interrupts enabled.
|
|
There seems to be some issue when the stack pointer enters into the indirect IRAM
|
|
address space during interrupt handling.
|
|
This architecture has not been built in some time will likely have some compilation
|
|
problems because of SDCC compiler differences.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Renesas/Hitachi SuperH</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>SH-1 SH7032</b>.
|
|
This port uses the Hitachi SH-1 Low-Cost Evaluation Board (SH1_LCEVB1), US7032EVB,
|
|
with a GNU arm-elf toolchain* under Linux or Cygwin.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
This port is available as of release 0.3.18 of NuttX. The port is basically complete
|
|
and many examples run correctly. However, there are remaining instabilities that
|
|
make the port un-usable. The nature of these is not understood; the behavior is
|
|
that certain SH-1 instructions stop working as advertised. This could be a silicon
|
|
problem, some pipeline issue that is not handled properly by the gcc 3.4.5 toolchain
|
|
(which has very limit SH-1 support to begin with), or perhaps with the CMON debugger.
|
|
At any rate, I have exhausted all of the energy that I am willing to put into this cool
|
|
old processor for the time being.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Renesas M16C/26</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>Renesas M16C/26 Microncontroller</b>.
|
|
This port uses the Renesas SKP16C26 Starter kit and the GNU M32C toolchain.
|
|
The development environment is either Linux or Cygwin under WinXP.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
Initial source files released in nuttx-0.4.2.
|
|
At this point, the port has not been integrated; the target cannot be built
|
|
because the GNU <code>m16c-elf-ld</code> link fails with the following message:
|
|
</p>
|
|
<ul>
|
|
<code>m32c-elf-ld: BFD (GNU Binutils) 2.19 assertion fail /home/Owner/projects/nuttx/buildroot/toolchain_build_m32c/binutils-2.19/bfd/elf32-m32c.c:482</code>
|
|
</ul>
|
|
<p>Where the reference line is:</p>
|
|
<ul><pre>
|
|
/* If the symbol is out of range for a 16-bit address,
|
|
we must have allocated a plt entry. */
|
|
BFD_ASSERT (*plt_offset != (bfd_vma) -1);
|
|
</pre></ul>
|
|
<p>
|
|
No workaround is known at this time. This is a show stopper for M16C for
|
|
the time being.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Zilog Z16F</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>Zilog z16f Microncontroller</b>.
|
|
This port use the Zilog z16f2800100zcog development kit and the Zilog
|
|
ZDS-II Windows command line tools.
|
|
The development environment is Cygwin under WinXP.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
The initial release of support for the z16f was made available in NuttX version 0.3.7.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Zilog eZ80 Acclaim!</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>Zilog eZ80Acclaim! Microncontroller</b>.
|
|
There are two eZ80Acclaim! ports:
|
|
</p>
|
|
<ul>
|
|
<li>One uses the ZiLOG ez80f0910200kitg development kit, and
|
|
<li>The other uses the ZiLOG ez80f0910200zcog-d development kit.
|
|
</ul>
|
|
<p>
|
|
Both boards are based on the eZ80F091 part and both use the Zilog ZDS-II
|
|
Windows command line tools.
|
|
The development environment is Cygwin under WinXP.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
Integration and testing of NuttX on the ZiLOG ez80f0910200zcog-d is complete.
|
|
The first integrated version was released in NuttX version 0.4.2 (with important early bugfixes
|
|
in 0.4.3 and 0.4.4).
|
|
As of this writing, that port provides basic board support with a serial console, SPI, and eZ80F91 EMAC driver.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Zilog Z8Encore!</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>Zilog Z8Encore! Microncontroller</b>.
|
|
This port uses the either:
|
|
</p>
|
|
<ul>
|
|
<li>Zilog z8encore000zco development kit, Z8F6403 part, or</li>
|
|
<li>Zilog z8f64200100kit development kit, Z8F6423 part</li>
|
|
</ul>
|
|
<p>
|
|
and the Zilog ZDS-II Windows command line tools.
|
|
The development environment is Cygwin under WinXP.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
This release has been verified only on the ZiLOG ZDS-II Z8Encore! chip simulation
|
|
as of nuttx-0.3.9.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Zilog Z80</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
<b>Z80 Instruction Set Simulator</b>.
|
|
This port uses the <a href="http://sdcc.sourceforge.net/">SDCC</a> toolchain
|
|
under Linux or Cygwin (verified using version 2.6.0).
|
|
This port has been verified using only a Z80 instruction simulator.
|
|
That simulator can be found in the NuttX CVS
|
|
<a href="http://nuttx.cvs.sourceforge.net/nuttx/misc/sims/z80sim/">here</a>.
|
|
</p>
|
|
<p>
|
|
<b>STATUS:</b>
|
|
This port is complete and stable to the extent that it can be tested
|
|
using an instruction set simulator.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Other ports</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
There are partial ports for the TI TMS320DM270 and for MIPS.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
</table></center>
|
|
|
|
<blockquote>* A highly modified <a href="http://buildroot.uclibc.org/">buildroot</a>
|
|
is available that may be used to build a NuttX-compatible ELF toolchain under
|
|
Linux or Cygwin. Configurations are available in that buildroot to support ARM,
|
|
m68k, m68hc11, m68hc12, and SuperH ports.</blockquote>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="environments"><h1>Development Environments</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<center><table width="90%">
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Linux + GNU make + GCC/binutils</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
The is the most natural development environment for NuttX.
|
|
Any version of the GCC/binutils toolchain may be used.
|
|
There is a highly modified <a href="http://buildroot.uclibc.org/">buildroot</a>
|
|
available for download from the
|
|
<a href="http://sourceforge.net/project/showfiles.php?group_id=189573">NuttX SourceForge</a>
|
|
page.
|
|
This download may be used to build a NuttX-compatible ELF toolchain under Linux or Cygwin.
|
|
That toolchain will support ARM, m68k, m68hc11, m68hc12, and SuperH ports.
|
|
The buildroot CVS may be accessed in the
|
|
<a href="http://nuttx.cvs.sourceforge.net/nuttx/misc/buildroot/">NuttX CVS</a>.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Linux + GNU make + SDCC</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
Also very usable is the Linux environment using the
|
|
<a href="http://sdcc.sourceforge.net/">SDCC</a> compiler.
|
|
The SDCC compiler provides support for the 8051/2, z80, hc08, and other microcontrollers.
|
|
The SDCC-based logic is less well exercised and you will likely find some compilation
|
|
issues if you use parts of NuttX with SDCC that have not been well-tested.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Cygwin + GNU make + GCC/binutils</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
This combination works well too.
|
|
It works just as well as the native Linux environment except
|
|
that compilation and build times are a little longer.
|
|
The custom NuttX buildroot referenced above may be build in
|
|
the Cygwin environment as well.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Cygwin + GNU make + SDCC</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
I have never tried this combination, but it would probably work just fine.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Cygwin + GNU make + Windows Native Toolchain</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
This is a tougher environment.
|
|
In this case, the Windows native toolchain is unaware of the the
|
|
Cygwin <i>sandbox</i> and, instead, operates in the native Windows environment.
|
|
The primary difficulties with this are:
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<b>Paths</b>.
|
|
Full paths for the native toolchain must follow Windows standards.
|
|
For example, the path <code>/home/my\ name/nuttx/include</code> my have to be
|
|
converted to something like <code>'C:\cygwin\home\my name\nuttx\include'</code>
|
|
to be usable by the toolchain.
|
|
</li>
|
|
<p>
|
|
Fortunately, this conversion is done simply using the <code>cygpath</code> utility.
|
|
</p>
|
|
<li>
|
|
<b>Symbolic Links</b>
|
|
NuttX depends on symbolic links to install platform-specific directories in the build system.
|
|
On Linux, true symbolic links are used.
|
|
On Cygwin, emulated symbolic links are used.
|
|
Unfortunately, for native Windows applications that operate outside of the
|
|
Cygwin <i>sandbox</i>, these symbolic links cannot be used.
|
|
</li>
|
|
<p>
|
|
The NuttX make system works around this limitation by copying the platform
|
|
specific directories in place.
|
|
These copied directories make work a little more complex, but otherwise work well.
|
|
</p>
|
|
</ul>
|
|
<p>
|
|
At present, only the Zilog Z16F, z8Encore, and eZ80Acclaim ports use a native Windows toolchain
|
|
(the Zilog ZDS-II toolchain).
|
|
</p.
|
|
</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td bgcolor="#5eaee1">
|
|
<b>Other Environments?</b>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><br></td>
|
|
<td>
|
|
<p>
|
|
The primary environmental dependency of NuttX are (1) GNU make,
|
|
(2) bash scripting, and (3) Linux utilities (such as sed).
|
|
If you have other platforms that support GNU make or make
|
|
utilities that are compatible with GNU make, then it is very
|
|
likely that NuttX would work in that environment as well (with some
|
|
porting effort). If GNU make is not supported, then some significant
|
|
modification of the Make system would be required.
|
|
</p>
|
|
</td>
|
|
</tr>
|
|
</table></center>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="footprint"><h1>Memory Footprint</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<ul>
|
|
<p><b>C5471 (ARM7)</b>
|
|
The build for this ARM7 target that includes most of the OS features and
|
|
a broad range of OS tests. The size of this executable as given by the
|
|
Linux <tt>size</tt> command is (3/9/07):
|
|
</p>
|
|
<pre>
|
|
text data bss dec hex filename
|
|
53272 428 3568 57268 dfb4 nuttx
|
|
</pre>
|
|
<p><b>DM320 (ARM9)</b>
|
|
This build for the ARM9 target includes a significant subset of OS
|
|
features, a filesystem, Ethernet driver, full TCP/IP, UDP and (minimal)
|
|
ICMP stacks (via uIP) and a small network test application: (11/8/07,
|
|
configuration netconfig, examples/nettest)
|
|
</p>
|
|
<pre>
|
|
text data bss dec hex filename
|
|
49472 296 3972 53740 d1ec nuttx
|
|
</pre>
|
|
<p>
|
|
Another build for the ARM9 target includes a minimal OS feature
|
|
set, Ethernet driver, full TCP/IP and (minimal) ICMP stacks, and
|
|
a small webserver: (11/20/07, configuration uipconfig, examples/uip)
|
|
</p>
|
|
<pre>
|
|
text data bss dec hex filename
|
|
52040 72 4148 56260 dbc4 nuttx
|
|
</pre>
|
|
<p><b>87C52</b>
|
|
A reduced functionality OS test for the 8052 target requires only
|
|
about 18-19Kb:
|
|
</p>
|
|
<pre>
|
|
Stack starts at: 0x21 (sp set to 0x20) with 223 bytes available.
|
|
|
|
Other memory:
|
|
Name Start End Size Max
|
|
---------------- -------- -------- -------- --------
|
|
PAGED EXT. RAM 0 256
|
|
EXTERNAL RAM 0x0100 0x02fd 510 7936
|
|
ROM/EPROM/FLASH 0x2100 0x6e55 19798 24384
|
|
</pre>
|
|
</ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="licensing"><h1>Licensing</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<ul>
|
|
<p>
|
|
NuttX is available under the highly permissive
|
|
<a href="http://en.wikipedia.org/wiki/BSD_license">BSD license</a>.
|
|
Other than some fine print that you agree to respect the copyright
|
|
you should feel absolutely free to use NuttX in any environment and
|
|
without any concern for jeopardizing any proprietary software that
|
|
you may link with it.
|
|
</p>
|
|
</ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="history"><h1>Release History</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<ul>
|
|
<p>
|
|
The current NuttX Change Log is available in CVS <a href="http://nuttx.cvs.sourceforge.net/*checkout*/nuttx/nuttx/ChangeLog">here</a>.
|
|
ChangeLog snapshots associated with the current release are available below.
|
|
</p>
|
|
</ul>
|
|
|
|
<center><table width ="80%">
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td>
|
|
<a href="ChangeLog.txt">Change Logs for All NuttX Releases</a><br>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td>
|
|
<a href="#currentrelease">ChangeLog for Current Releases</a><br>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td>
|
|
<a href="#pendingchanges">Unreleased Changes</a>
|
|
</td>
|
|
</tr>
|
|
</table></center>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="currentrelease">ChangeLog for Current Release</a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<pre><ul>
|
|
nuttx-0.4.5 2009-04-19 Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
|
|
* Add an enumeration argument to the SPI chip select and status methods so
|
|
that the interface can handle more than one device.
|
|
* eZ80Acclaim!: Add a generic SPI driver for all eZ80 boards.
|
|
* Add a setmode() method to the SPI interface to handle parts with differing
|
|
mode requirements.
|
|
* include/nuttx/i2c.h: Defined a standard I2C interface
|
|
* eZ80Acclaim!: Add an I2C driver.
|
|
* eZ8Encore!: Add an I2C driver.
|
|
* Add support for the Freescale i.MX1/L architecture and a configuration for
|
|
the Freescale MX1ADS development board.
|
|
* examples/helloxx: Added a simple C++ hello world example
|
|
* include/css: Added std header files
|
|
* libxx: New C++-only directory provides support for minimal C++ applications
|
|
|
|
pascal-0.1.2 2008-02-10 Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
|
|
* Add logic to build and link with the ZDS-II toolchain
|
|
use with the z16f.
|
|
* Make sure that POFF header structures are aligned
|
|
* Standardized POFF file format to big-endian
|
|
* Break up large switch statements to lower complexity
|
|
and eliminate a compiler bug
|
|
* Changes so that runtime compiles with SDCC.
|
|
|
|
buildroot-0.1.5 2009-04-25 <spudmonkey@racsa.co.cr>
|
|
|
|
* Replaced config/arm-defconfig-4.2.4 with config/arm920t-defconfig-4.2.4
|
|
and config/arm926t-defconfig-4.2.4 because of differences in the
|
|
way that soft floating point is handled between these two
|
|
architectures.
|
|
* Add support for gcc-4.3.3 and the ARM Cortex-M3 processor (thumb2)
|
|
* Add support for binutils 2.19.1
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="pendingchanges">Unreleased Changes</a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<pre><ul>
|
|
nuttx-0.4.6 2009-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
|
|
* Change SPI interface so that is can accomodate interfaces where the
|
|
number of bits per word is greater an 8 (such as with many 9-bit display
|
|
interfaces). -- this might have broken a few things which will need to
|
|
be retested!
|
|
* arch/arm/src/imx: Added i.MX SPI driver
|
|
* SPI: Add a method to set the number of bits per word. Also add an
|
|
alternative interface for so that (eventually) I can phase the sndblock
|
|
and recvblock methods and replace them with a single exchange method
|
|
* Build: objcopy fails with toolchains that use newer GCC and binutils. The
|
|
following arguments need to be included in the objcopy command line "-R .note
|
|
-R .note.gnu.build-id -R .comment" This has bin fixed in arch/arm/src/Makefile,
|
|
but other architectures may have the same problem. Thanks to Dave Marples
|
|
for verifying this.
|
|
* Began adding support for the MicroMint Eagle100 board. This board has a
|
|
Luminary LM3S6918 Cortex-M3.
|
|
* Add configuration option to enable fast GPIO (vs. legacy, "slow" GPIO) for
|
|
LPC214x.
|
|
|
|
pascal-0.1.3 2009-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
|
|
buildroot-0.1.6 2009-xx-xx <spudmonkey@racsa.co.cr>
|
|
|
|
* Added config/arm7tdmi-defconfig-4.2.4
|
|
* Added config/arm920t-defconfig-4.3.3
|
|
* Correct error in arm-defconfig gcc-3.4.6 build. The gcc-3.4.6 configuration
|
|
does not not take --with-abi
|
|
* Correct error in gcc-3.4.6/gcc/collect.c. Calls open with O_CREAT but
|
|
does not specify mode. Newer host compilers can error out on this.
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="TODO"><h1>Bugs, Issues, <i>Things-To-Do</i></h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<ul>
|
|
<p>
|
|
The current list of NuttX <i>Things-To-Do</i> in CVS <a href="http://nuttx.cvs.sourceforge.net/*checkout*/nuttx/nuttx/TODO">here</a>.
|
|
A snapshot of the <i>To-Do</i> list associated with the current release are available <a href="TODO.txt">here</a>.
|
|
</p>
|
|
</ul>
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="documentation"><h1>Other Documentation</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<ul><table>
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td><a href="NuttxUserGuide.html">User Guide</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td><a href="NuttxPortingGuide.html">Porting Guide</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td><a href="NuttShell.html">NuttShell (NSH)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td><a href="NXGraphicsSubsystem.html">NX Graphics Subsystem</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td><a href="ChangeLog.txt">Change Log</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
|
|
<td><a href="TODO.txt">To-Do List</a></td>
|
|
</tr>
|
|
</center></ul>
|
|
|
|
<small>
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="trademarks"><h1>Trademarks</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<ul>
|
|
<li>ARM, ARM7 ARM7TDMI, ARM9, ARM920T, ARM926EJS are trademarks of Advanced RISC Machines, Limited.</li>
|
|
<li>Cygwin is a trademark of Red Hat, Incorporated.</li>
|
|
<li>Linux is a registered trademark of Linus Torvalds.</li>
|
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<li>LPC2148 is a trademark of NXP Semiconductors.</li>
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<li>TI is a tradename of Texas Instruments Incorporated.</li>
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<li>UNIX is a registered trademark of The Open Group.</li>
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<li>VxWorks is a registered trademark of Wind River Systems, Incorporated.</li>
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<li>ZDS, ZNEO, Z16F, Z80, and Zilog are a registered trademark of Zilog, Inc.</li>
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</ul>
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<p>
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NOTE: NuttX is <i>not</i> licensed to use the POSIX trademark. NuttX uses the POSIX
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standard as a development guideline only.
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</p>
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</small>
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</body>
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</html>
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