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Add 8052 IRQ test; Fix places where IDLE task could try to wait on semaphores

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@61 42af7a65-404d-4744-a932-0658087f49c3
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patacongo 2007-03-14 18:58:21 +00:00
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2 changed files with 74 additions and 14 deletions
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Documentation/NuttX.html
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@ -3,12 +3,22 @@
<title>NuttX</title> <title>NuttX</title>
</head> </head>
<body background="backgd.gif"> <body background="backgd.gif">
<hr> <center>
<hr> <hr><hr>
<center><h1><i>Under Construction</i></h1></center> <h1><big><i>NuttX RTOS</i></big></h1>
<hr> <p>Last Updated: March 14, 2007</p>
<hr> <hr><hr>
<h1>Overview</h1> <h1>Table of Contents</h1>
</center>
<li><a href="#overview">Overview</a></li>
<li><a href="#downloads">Downloads</a></li>
<li><a href="#platforms">Supported Platforms</a></li>
<li><a href="#footprint">Memory Footprint</a></li>
<li><a href="#licensing">Licensing</a></li>
<li><a href="#history">Release History</a></li>
<li><a href="#documentation">Other Documentation</a></li>
<a name="overview"><h1>Overview</h1></a>
<p> <p>
<b>Goals</b>. <b>Goals</b>.
Nuttx is a real timed embedded operating system (RTOS). Nuttx is a real timed embedded operating system (RTOS).
@ -60,7 +70,7 @@
</p> </p>
</ol> </ol>
<h1>Downloads</h1> <a name="downloads"><h1>Downloads</h1></a>
<p> <p>
The initial release of NuttX (nuttx-0.1.0) is avalable for download The initial release of NuttX (nuttx-0.1.0) is avalable for download
@ -68,7 +78,7 @@
website. website.
</p> </p>
<h1>Supported Platforms</h1> <a name="platforms"><h1>Supported Platforms</h1></a>
<ul> <ul>
<li><b>Linux User Mode</b></li> <li><b>Linux User Mode</b></li>
@ -95,7 +105,9 @@
and the <a href="http://sdcc.sourceforge.net/">SDCC</a> toolchain. and the <a href="http://sdcc.sourceforge.net/">SDCC</a> toolchain.
</p> </p>
<p> <p>
STATUS: This port will require a few more weeks before it is ready for prime time. STATUS: 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.
</p> </p>
<li><b>Other ports</b></li> <li><b>Other ports</b></li>
<p> <p>
@ -106,7 +118,7 @@
<blockquote>* A highly modified <a href="http://buildroot.uclibc.org/">buildroot</a> <blockquote>* A highly modified <a href="http://buildroot.uclibc.org/">buildroot</a>
is available that be used to build a NuttX-compatible arm-elf toolchain.</blockquote> is available that be used to build a NuttX-compatible arm-elf toolchain.</blockquote>
<h1>Memory Footprint</h1> <a name="footprint"><h1>Memory Footprint</h1></a>
<p><b>C5471 (Arm7)</b> <p><b>C5471 (Arm7)</b>
The build for this ARM7 target that includes most of the OS features and The build for this ARM7 target that includes most of the OS features and
@ -118,11 +130,21 @@ is available that be used to build a NuttX-compatible arm-elf toolchain.</blockq
53272 428 3568 57268 dfb4 nuttx 53272 428 3568 57268 dfb4 nuttx
</pre> </pre>
<p><b>87C52</b> <p><b>87C52</b>
A reduced functionality OS test for the 8051 target requires only A reduced functionality OS test for the 8052 target requires only
about 18Kb (see <a href="codesize-070301.xls">spreadsheet</a> for details). about 18-19Kb:
</p> </p>
<pre>
Stack starts at: 0x21 (sp set to 0x20) with 223 bytes available.
<h1>Licensing</h1> 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>
<a name="licensing"><h1>Licensing</h1></a>
<p>NuttX is available under the highly permissive <p>NuttX is available under the highly permissive
<a href="http://en.wikipedia.org/wiki/BSD_license">BSD license</a>. <a href="http://en.wikipedia.org/wiki/BSD_license">BSD license</a>.
@ -131,7 +153,45 @@ is available that be used to build a NuttX-compatible arm-elf toolchain.</blockq
without any concern for jeopardizing any proprietary software that without any concern for jeopardizing any proprietary software that
you may link with it.</p> you may link with it.</p>
<h1>Other Documentation</h1> <a name="history"><h1>Release History</h1></a>
<pre>
0.1.0 2007-03-09 Gregory Nutt <spudmonkey@racsa.co.cr>
* Initial Release
* Support for Linux user mode simulation and TI
TMS320C5471 (Arm7) provided
0.1.1 2007-03-14 Gregory Nutt <spudmonkey@racsa.co.cr>
* Corrected an error in interrupt level context switching
for C5471
* Added fgets() and gets() logic; verified c5471 console read.
* Corrected error in reading from the C5471 serial port:
Improper use of semaphore can cause deadlock.
* Fixed an error in the memory cleanup: The idle task
cannot take sempahores (because it must always be ready
to run).
* Tasks can now accept a configurable maximum number of
input parameters (argc)
* _task_init() was divided into separate functions that
require fewer parameters. This was necessary to keep
the stack usage down for the 8051/2 (which has only
256 bytes of stack).
* Attempts to use C5471 console from interrupt handlers
can casue errors. Added a special path for this case.
* Refuse calls to sem_wait and sem_trywait from interrupt
handlers. This was happening because interrupt handlers
were calling printf-like functions.
* Added strtok() and strtok_r()
* Added a simple shell called nsh (see examples/nsh).
* Platform support for 8052 is complete but not stable
when the timer interrupt is enabled. Seems to be an
issue when SP enters indirect address space.
* Documentation updates
</pre>
<a name="documentation"><h1>Other Documentation</h1></a>
<li><a href="NuttxUserGuide.html">User Guide</li> <li><a href="NuttxUserGuide.html">User Guide</li>
<li><a href="NuttxPortingGuide.html">Porting Guide</li> <li><a href="NuttxPortingGuide.html">Porting Guide</li>

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