2007-02-22 02:50:30 +01:00
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<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>
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<hr>
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<center><h1><i>Under Construction</i></h1></center>
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<hr>
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<hr>
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<h1>Overview</h1>
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<p>
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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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<ol>
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<li>A very small footprint usable in all but the tightest micro-controller environments,</li>
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<li>Fully scalable from tiny (8-bit) to moderate embedded (32-bit),</li>
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<li>High degree of standards compliance.</li>
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<li>Totally open.</li>
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</ol>
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<h1>Supported Platforms</h1>
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2007-02-28 02:16:49 +01:00
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<ul>
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<li><b>x86 Linux Simulation</b>. Fully functional.</li>
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<li>TI <b>TMS320C5471</b> (also called <b>TMS320DM180</b>).
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NuttX operates on the ARM7 of this dual core processor.
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This port uses the <a href="http://www.spectrumdigital.com/">Spectrum Digital</a>
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evaluation board with a GNU arm-elf toolchain*.
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This port is in progress and partially functional (However,
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my board is dead at the moment so it will be awhile before I fix it)</li>
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<li><b>8051 Microcontroller</b>.
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This port uses the <a href="http://www.pjrc.com/">PJRC</a> 87C52 development system
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and the <a href="http://sdcc.sourceforge.net/">SDCC</a> toolchain.
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2007-03-02 23:44:29 +01:00
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This port will require a few more weeks before it is ready for prime time.</li>
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2007-02-28 02:16:49 +01:00
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<li><b>Other ports</b>.
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I also have partial ports for the TI TMS320DM270 and for MIPS.
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</ul>
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<blockquote>* A highly modified <a href="http://buildroot.uclibc.org/">buildroot</a>
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is available that be used to build a NuttX-compatible arm-elf toolchain.</blockquote>
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<h1>Memory Footprint</h1>
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2007-03-01 22:05:55 +01:00
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<p>Details to be provided</p>
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<p>
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I have a complete build for an ARM7 target that includes most of the OS
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features and a broad range of OS tests.
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That builds to an executable that requires about 85Kb for .text, .data., and .bss.
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</p>
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<p>
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I have a stripped down OS test for the 8051 target that requires only
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2007-03-01 22:46:29 +01:00
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18Kb. A substantial effort was required to get to this size
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(see <a href="codesize-070301.xls">spreadsheet</a> for details).
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2007-03-01 22:05:55 +01:00
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</p>
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2007-02-28 02:16:49 +01:00
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<h1>Licensing</h1>
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<p>NuttX is available under the highly permissive
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<a href="http://en.wikipedia.org/wiki/BSD_license">BSD license</a>.
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Other than some fine print that you agree to respect my copyright
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you should feel absolutely free to use NuttX in any environment and
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without any concern for jeopardizing any proprietary software that
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you may link with it.</p>
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2007-02-22 02:50:30 +01:00
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<h1>Other Documentation</h1>
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<li><a href="NuttxUserGuide.html">User Guide</li>
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<li><a href="NuttxPortingGuide.html">Porting Guide</li>
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</body>
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</html>
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