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<html>
<head>
<title>NuttX</title>
</head>
<body background="backgd.gif">
<hr><hr>
<table width ="100%">
<tr align="center" bgcolor="#e4e4e4">
<td>
<h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
<p>Last Updated: December 12, 2010</p>
</td>
</tr>
</table>
<hr><hr>
<table width ="100%">
<tr bgcolor="#e4e4e4">
<td>
<h1>Table of Contents</h1>
</td>
</tr>
</table>
<center><table width ="80%">
<tr>
<td>
<table>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td>
<a href="#overview">Overview</a>.<br>
What is NuttX? Look at all those files and features... How can it be a tiny OS?
</td>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td>
<a href="#group">NuttX Discussion Group</a>.<br>
Do you want to talk about NuttX features? Do you need some help? Problems? Bugs?
</td>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td>
<a href="#downloads">Downloads</a>.<br>
Where can I get NuttX? What is the current development status?
</td>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td>
<a href="#platforms">Supported Platforms</a>.<br>
What target platforms has NuttX been ported to?
</td>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td>
<a href="#environments">Development Environments</a>.<br>
What kinds of host cross-development platforms can be used with NuttX?
</td>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td>
<a href="#footprint">Memory Footprint</a>.<br>
Just how big is it? Do I have enough memory to use NuttX?
</td>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td>
<a href="#licensing">Licensing</a>.<br>
Are there any licensing restrictions for the use of NuttX? (Almost none)
Will there be problems if I link my proprietary code with NuttX? (No)
</td>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td>
<a href="#history">Release History</a><br>
What has changed in the last release of NuttX?
What unreleased changes are pending in CVS?
</td>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td>
<a href="#TODO">Bugs, Issues, <i>Things-To-Do</i></a>.<br>
Software is never finished nor ever tested well enough.
(Do you want to help develop NuttX? If so, send me an email).
</td>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td>
<a href="#documentation">Other Documentation</a>.<br>
What other NuttX documentation is available?
</td>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td>
<a href="#trademarks">Trademarks</a>.<br>
Some of the words used in this document belong to other people.
</td>
</tr>
</table>
</td>
</tr>
</table></center>
<table width ="100%">
<tr bgcolor="#e4e4e4">
<td>
<a name="overview"><h1>Overview</h1></a>
</td>
</tr>
</table>
<p>
<b>Goals</b>.
Nuttx is a real timed embedded operating system (RTOS).
Its goals are:
<p>
<center><table width="90%">
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Small Footprint</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
Usable in all but the tightest micro-controller environments,
The focus is on the tiny-to-small, deeply embedded environment.
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Rich Feature OS Set</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
The goal is to provide implementations of most standard POSIX OS interfaces
to support a rich, multi-threaded development environment for deeply embedded
processors.
</p>
NON-GOALS: (1) It is not a goal to provide the rich level of OS
features like those provided with Linux.
Small footprint is more important than features.
Standard compliance is more important than small footprint.
(2) There is no MMU-based support for processes.
At present, NuttX assumes a flat address space.
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Highly Scalable</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
Fully scalable from tiny (8-bit) to moderate embedded (32-bit).
Scalability with rich feature set is accomplished with:
Many tiny source files, link from static libraries, highly configurable, use of
weak symbols when available.
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Standards Compliance</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
NuttX strives to achieve a high degree of standards compliance.
The primary governing standards are POSIX and ANSI standards.
Additional standard APIs from Unix and other common RTOS's are
adopted for functionality not available under these standards
or for functionality that is not appropriate for the deeply-embedded
RTOS (such as <code>fork()</code>).
</p>
<p>
Because of this standards conformance, software developed under other
standard OSs (such as Linux) should port easily to NuttX.
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Real-Time</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
Fully pre-emptible, fixed priority and round-robin scheduling.
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Totally Open</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
Non-restrictive BSD license.
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>GNU Toolchains</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
Compatible GNU toolchains based on <a href="http://buildroot.uclibc.org/">buildroot</a>
available for
<a href="https://sourceforge.net/project/showfiles.php?group_id=189573&package_id=224585">download</a>
to provide a complete development environment for many architectures.
</p>
</tr>
</table></center>
<p>
<b>Feature Set</b>.
Key features of NuttX include:
<p>
<center><table width="90%">
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Standards Compliant Core Task Management</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Modular, micro-kernel</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Fully pre-emptible.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Naturally scalable.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Highly configurable.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Easily extensible to new processor architectures, SoC architecture, or board architectures.
A <a href="NuttxPortingGuide.html">Porting Guide</a> is in development.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>FIFO and round-robin scheduling.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Realtime, deterministic, with support for priority inheritance</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>POSIX/ANSI-like task controls, named message queues, counting semaphores, clocks/timers, signals, pthreads, environment variables, filesystem.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>VxWorks-like task management and watchdog timers.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>BSD socket interface.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Extensions to manage pre-emption.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>On-demand paging.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Well documented in the NuttX <a href="NuttxUserGuide.html">User Guide</a>.</li>
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>File system</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Tiny in-memory, root pseudo-file-system.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Supports character and block drivers.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Network, USB (device), serial, CAN, driver architecture.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>RAMDISK, pipes, FIFO, <code>/dev/null</code>, <code>/dev/zero</code> drivers.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Mount-able volumes. Bind mountpoint, filesystem, and block device driver.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>FAT12/16/32 filesystem support.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Generic driver for SPI-based MMC/SD/SDH cards.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>ROMFS filesystem support.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li><a href="NuttXNxFlat.html">NXFLAT</a>.
A new binary format call NXFLAT that can be used to
execute separately linked programs in place in a file system.
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>C Library</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Fully integrated into the OS.</li>
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Networking</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>TCP/IP, UDP, ICMP, IGMPv2 (client) stacks.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Small footprint (based on uIP).</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>BSD compatible socket layer.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Networking utilities (DHCP, SMTP, TELNET, TFTP, HTTP)</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>
A NuttX port of Jeff Poskanzer's <a href="http://acme.com/software/thttpd">THTTPD</a> HTTP server
integrated with <a href="NuttXNxFlat.html">NXFLAT</a> to provide true, embedded CGI.
</li>
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>FLASH Support</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li><i>MTD</i>-inspired interface for <i>M</i>emory <i>T</i>echnology <i>D</i>evices.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li><i>FTL</i>. Simple <i>F</i>lash <i>T</i>ranslation <i>L</i>ayer support file systems on FLASH.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Support for SPI-based FLASH devices.</li>
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>USB Device Support</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li><i>Gadget</i>-like architecture for USB device controller drivers and device-dependent USB class drivers.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>USB device controller drivers available for the NXP LPC214x, LPC313x, STMicro STM32 and TI DM320.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Device-dependent USB class drivers available for USB serial and for USB mass storage.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Built-in USB trace functionality for USB debug.</li>
</p>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Graphics Support</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>Framebuffer drivers.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>LCD drivers for both parallel and SPI LCDs and OLEDs.</li>
</p>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>
NX: A graphics library, tiny windowing system and tiny font support that works with either framebuffer or LCD drivers.
Documented in the <a href="NXGraphicsSubsystem.html">NX Graphics Subsystem</a>
manual.
</li>
</p>
</tr>
</table></center>
<p>
<b>NuttX Add-Ons</b>.
The following packages are available to extend the basic NuttX feature set:
</p>
<center><table width="90%">
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>NuttShell (NSH)</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<li>A small, scalable, bash-like shell for NuttX with rich feature set and small footprint.
See the <a href="NuttShell.html">NuttShell User Guide</a>.</li>
</p>
</tr>
<tr>
<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="group"><h1>NuttX Discussion Group</h1></a>
</td>
</tr>
</table>
<p>
Most Nuttx-related discussion occurs on the <a href="http://tech.groups.yahoo.com/group/nuttx/" target="_top"><i>Yahoo!</i> NuttX group</a>.
You are cordially invited to <a href="http://groups.yahoo.com/group/nuttx/join" target="_top">join</a>.
I make a special effort to answer any questions and provide any help that I can.
</p>
<table width ="100%">
<tr bgcolor="#e4e4e4">
<td>
<a name="downloads"><h1>Downloads</h1></a>
</td>
</tr>
</table>
<p><b>nuttx-5.15 Release Notes</b>:
<p>
This 62<sup>nd</sup> release of NuttX, Version 5.15, was made on December12, 2010 and 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 includes several bugfixes as well as feature enhancements, primarily for the Olimex LPC1766-STK board.
Important bugfxes included:
<ul>
<li>
Additional fixes needed with the TCP sequence number problem &quot;fixed&quot; in nuttx-5.14.
</li>
<li>
In the <code>send()</code> logic, now checks if the destination IP address is in the ARP table before sending the packet;
an ARP request will go out instead of the TCP packet.
This improves behavior, for example, on the first on the first GET request from a browser
</li>
<li>
All USB class drivers need to call DEV_CONNECT() when they are ready to be enumerated.
That is, (1) initially when bound to the USB driver, and (2) after a USB reset.
</li>
<li>
The SPI_SETBITS macro was calling the SPI setmode method.
</li>
<li>
And several other bug fixes of lower criticality (see the ChangeLog for details).
</li>
</ul>
</p>
<p>
And feature enhancements:
<ul>
<li>
The LPC176x Ethernet driver was using all of AHB SRAM Bank0 for Ethernet packet buffers (16Kb).
An option was added to limit the amount of SRAM used for packet buffering and to re-use any extra Bank0 memory for heap.
</li>
<li>
Enabled networking and SD/MMC card support in the Olimex LPC1766-STK NuttShell (NSH) configuration.
</li>
<li>
The LPC176x USB driver is now fully fully functional.
</li>
<li>
Added an optional <code>cmddata()</code> method to the SPI interface.
Some devices require an additional out-of-band bit to specify if the next word sent to the device is a command or data.
The <code>cmddata()</code> method provides selection of command or data.
</li>
<li>
A driver for the Nokia 6100 LCD (with either the Phillips PCF8833 LCD controller and for the Epson S1D15G10 LCD controller)
and an NX graphics configuration for the Olimex LPC1766-STK have been added.
However, neither the LCD driver nor the NX configuration have been verified as of the this release.
</li>
</ul>
</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>
<ul>
<p>
<b>STATUS:</b>
Does not support interrupts but is otherwise fully functional.
</p>
</ul>
</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>
<ul>
<p>
<b>STATUS:</b>
This port is complete, verified, and included in the initial NuttX release.
</p>
</ul>
</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>
<ul>
<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 (<a href="NuttShell.html">NSH</a>)
configuration is also available.
</p>
<p>
<b>Development Environments:</b>
1) Linux with native Linux GNU toolchain, 2) Cygwin with Cygwin GNU toolchain, or 3) Cygwin
with Windows native toolchain (CodeSourcery or devkitARM). A DIY toolchain for Linux
or Cygwin is provided by the NuttX
<a href="http://sourceforge.net/project/showfiles.php?group_id=189573&package_id=224585">buildroot</a>
package.
</p>
</ul>
</td>
</tr>
<tr>
<td><br></td>
<td><hr></td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<b>NXP LPC2378</b>.
Support is provided for the NXP LPC2378 MCU. In particular,
support is provided for the Olimex-LPC2378 development board.
This port was contributed by Rommel Marcelo is was first released in NuttX-5.3.
This port also used the GNU arm-elf toolchain* under Linux or Cygwin.
</p>
<ul>
<p>
<b>STATUS:</b>
This port boots and passes the OS test (examples/ostest) and includes a
working implementation of the NuttShell (<a href="NuttShell.html">NSH</a>).
The port is complete and verified.
As of NuttX 5.3, the port includes only basic timer interrupts and serial console support.
</p>
<p>
<b>Development Environments:</b> (Same as for the NXP LPC214x).
</p>
</ul>
</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>
<ul>
<p>
<b>STATUS:</b>
Integration is complete on the basic port (boot logic, system time, serial console).
Two configurations have been verified: (1) The board boots and passes the OS test
with console output visible on UART0, and the NuttShell (<a href="NuttShell.html">NSH</a>)
is fully functional with interrupt driven serial console. An SPI driver is available
but only partially tested. Additional features are needed: USB driver, MMC integration,
to name two (the slot on the board appears to accept on MMC card dimensions; I have only
SD cards).
An SPI-based ENC29J60 Ethernet driver for add-on hardware is under development and
should be available in the NuttX 5.5 release.
</p>
<p>
<b>Development Environments:</b>
1) Linux with native Linux GNU toolchain, 2) Cygwin with Cygwin GNU toolchain, or 3) Cygwin
with Windows native toolchain (CodeSourcery or devkitARM). A DIY toolchain for Linux
or Cygwin is provided by the NuttX
<a href="http://sourceforge.net/project/showfiles.php?group_id=189573&package_id=224585">buildroot</a>
package.
</p>
</ul>
</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>
<ul>
<p>
<b>STATUS:</b>
This port has stalled due to development tool issues.
Coding is complete on the basic port (timer, serial console, SPI).
</p>
</ul>
</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.
The port was performed using the OSD v1.0, development board.
</p>
<ul>
<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>
</ul>
</td>
</tr>
<tr>
<td><br></td>
<td><hr></td>
</tr>
<tr>
<td><br></td>
<td>
<b>NXP <a href="http://ics.nxp.com/products/lpc3000/lpc313x.lpc314x.lpc315x/">LPC3131</a></b>.
The port for the NXP LPC3131 on the <a href="http://www.embeddedartists.com/products/kits/lpc3131_kit.php">Embedded Artists EA3131</a>
development board was first released in NuttX-5.1 with a GNU arm-elf or arm-eabi toolchain* under Linux or Cygwin
(but was not functional until NuttX-5.2).
</p>
<ul>
<p>
<b>STATUS:</b>
The basic EA3131 port is complete and verified in NuttX-5.2
This basic port includes basic boot-up, serial console, and timer interrupts.
This port was extended in NuttX 5.3 with a USB high speed driver contributed by David Hewson.
David also contributed I2C and SPI drivers plus several important LPC313x USB bug fixes
that appear in the NuttX 5.6 release.
This port has been verified using the NuttX OS test, USB serial and mass storage
tests and includes a working implementation of the NuttShell (<a href="NuttShell.html">NSH</a>).
</p>
<p>
Support for <a href="NuttXDemandPaging.html">on-demand paging</a> has been developed for the EA3131.
That support would all execute of a program in SPI FLASH by paging code sections out of SPI flash as needed.
However, as of this writing, I have not had the opportunity to verify this new feature.
</p>
</ul>
</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/TI LM3S6918</b>.
This port uses the <a href=" http://www.micromint.com/">Micromint</a> Eagle-100 development
board with a GNU arm-elf toolchain* under either Linux or Cygwin.
</p>
<ul>
<p>
<b>STATUS:</b>
The initial, release of this port was included in NuttX version 0.4.6.
The current port includes timer, serial console, Ethernet, SSI, and microSD support.
There are working configurations the NuttX OS test, to run the <a href="NuttShell.html">NuttShell
(NSH)</a>, the NuttX networking test, and the uIP web server.
</p>
<p>
<b>Development Environments:</b>
1) Linux with native Linux GNU toolchain, 2) Cygwin with Cygwin GNU toolchain, or 3) Cygwin
with Windows native toolchain (CodeSourcery or devkitARM). A DIY toolchain for Linux
or Cygwin is provided by the NuttX
<a href="http://sourceforge.net/project/showfiles.php?group_id=189573&package_id=224585">buildroot</a>
package.
</p>
</ul>
</td>
</tr>
<tr>
<td><br></td>
<td><hr></td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<b>Luminary/TI LM3S6965</b>.
This port uses the Stellaris LM3S6965 Ethernet Evalution Kit with a GNU arm-elf toolchain*
under either Linux or Cygwin.
</p>
<ul>
<p>
<b>STATUS:</b>
This port was released in NuttX 5.5.
Features are the same as with the Eagle-100 LM3S6918 described above.
The examples/ostest configuration has been successfully verified and an
NSH configuration with telnet support is available.
MMC/SD and Networking support was not been thoroughly verified:
Current development efforts are focused on porting the NuttX window system (NX)
to work with the Evaluation Kits OLED display.
</p>
<p><small>
<b>NOTE</b>: As it is configured now, you MUST have a network connected.
Otherwise, the NSH prompt will not come up because the Ethernet
driver is waiting for the network to come up.
</small></p>
<p>
<b>Development Environments:</b> See the Eagle-100 LM3S6918 above.
</p>
</ul>
</td>
</tr>
<tr>
<td><br></td>
<td><hr></td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<b>Luminary/TI LM3S8962</b>.
This port uses the Stellaris EKC-LM3S8962 Ethernet+CAN Evalution Kit with a GNU arm-elf toolchain*
under either Linux or Cygwin.
Contributed by Larry Arnold.
</p>
<ul>
<p>
<b>STATUS:</b>
This port was released in NuttX 5.10.
Features are the same as with the Eagle-100 LM3S6918 described above.
</p>
</ul>
</td>
</tr>
<tr>
<td><br></td>
<td><hr></td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<b>Luminary/TI LM3S9B96</b>.
Header file support was contributed by Tiago Maluta for this part.
However, no complete board support configuration is available as of this writing.
</p>
</td>
</tr>
<tr>
<td><br></td>
<td><hr></td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<b>STMicro STM32F103x</b>.
This port uses the <a href=" http://www.st.com/">STMicro</a> STM3210E-EVAL development board that
features the STM32F103ZET6 MCU.
This port uses a GNU arm-elf toolchain* under either Linux or Cygwin (with native Windows GNU
tools or Cygwin-based GNU tools).
</p>
<ul>
<p>
<b>STATUS:</b>
The basic STM32 port was released in NuttX version 0.4.12. The basic port includes boot-up
logic, interrupt driven serial console, and system timer interrupts.
The 0.4.13 release added support for SPI, serial FLASH, and USB device.;
The 4.14 release added support for buttons and SDIO-based MMC/SD and verifed DMA support.
Verified configurations are available for NuttX OS test, the NuttShell (NSH) example,
the USB serial device class, and the USB mass storage device class example.
</p>
<p>
<b>Development Environments:</b>
1) Linux with native Linux GNU toolchain, 2) Cygwin with Cygwin GNU toolchain, or 3) Cygwin
with Windows native toolchain (RIDE7, CodeSourcery or devkitARM). A DIY toolchain for Linux
or Cygwin is provided by the NuttX
<a href="http://sourceforge.net/project/showfiles.php?group_id=189573&package_id=224585">buildroot</a>
package.
</p>
</ul>
</td>
</tr>
<tr>
<td><br></td>
<td><hr></td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<b>Atmel AT91SAM3U</b>.
This port uses the <a href="http://www.atmel.com/">Atmel</a> SAM3U-EK
development board that features the AT91SAM3U4E MCU.
This port uses a GNU arm-elf or arm-eabi toolchain* under either Linux or Cygwin (with native Windows GNU
tools or Cygwin-based GNU tools).
</p>
<ul>
<p>
<b>STATUS:</b>
The basic SAM3U-EK port was released in NuttX version 5.1. The basic port includes boot-up
logic, interrupt driven serial console, and system timer interrupts.
That release passes the NuttX OS test and is proven to have a valid OS implementation.
A configuration to support the NuttShell is also included.
NuttX version 5.4 adds support for the HX8347 LCD on the SAM3U-EK board.
This LCD support includes an example using the
<a href=" http://www.nuttx.org/NXGraphicsSubsystem.html">NX graphics system</a>.
</p>
<p>
Subsequent NuttX releases will extend this port and add support for SDIO-based SD cards and
USB device (and possible LCD support).
These extensions may or may not happen by the Nuttx 5.5 release as my plate is kind of full now.
</p>
<p>
<b>Development Environments:</b>
1) Linux with native Linux GNU toolchain, 2) Cygwin with Cygwin GNU toolchain, or 3) Cygwin
with Windows native toolchain (CodeSourcery or devkitARM). A DIY toolchain for Linux
or Cygwin is provided by the NuttX
<a href="http://sourceforge.net/project/showfiles.php?group_id=189573&package_id=224585">buildroot</a>
package.
</p>
</ul>
</td>
</tr>
<tr>
<td><br></td>
<td><hr></td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<b>NXP LPC1766 and LPC1768</b>.
Configurations are available for three boards:
<ul>
<li>
The Nucleus 2G board from <a href="http://www.2g-eng.com/">2G Engineering</a> (LPC1768),
</li>
<li>
The mbed board from <a href="http://mbed.org">mbed.org</a> (LPC1768, Contributed by Dave Marples), and
</li>
<li>
The LPC1766-sTK board from <a href="http://www.olimex.com/">Olimex</a> (LPC1766).
</li>
</ul>
</p>
<p>
The Nucleus 2G and the mbed boards feature the NXP LPC1768 MCU;
the Olimex LPC1766-STK board features an LPC1766.
All use a GNU arm-elf or arm-eabi toolchain* under either Linux or Cygwin (with native Windows GNU tools or Cygwin-based GNU tools).
</p>
<ul>
<p>
<b>STATUS:</b>
</p>
<p>
<b>Nucleus2G LPC1768</b>.
Some initial files for the LPC17xx family were released in NuttX 5.6, but the first
functional release for the NXP LPC1768/Nucleus2G occured with NuttX 5.7 with some
additional enhancements through NuttX-5.9.
That initial, 5.6, basic release included <i>timer</i> interrupts and a <i>serial console</i> and was
verified using the NuttX OS test (<code>examples/ostest</code>).
Configurations available include include a verified NuttShell (NSH) configuration
(see the <a href="http://www.nuttx.org/NuttShell.html">NSH User Guide</a>).
The NSH configuration supports the Nucleus2G's microSD slot and additional configurations
are available to exercise the the USB serial and USB mass storage devices.
However, due to some technical reasons, neither the SPI nor the USB device drivers are fully verified.
(Although they have since been verfiied on other platforms; this needs to be revisited on the Nucleus2G).
</p>
<p>
<b>mbed LPC1768</b>.
Support for the mbed board was contributed by Dave Marples and released in NuttX-5.11.
This port includes a NuttX OS test configuration (see <code>examples/ostest</code>).
</p>
<p>
<b>Olimex LPC1766-STK</b>.
Support for that Olimex-LPC1766-STK board was added to NuttX 5.13.
The NuttX-5.14 release extended that support with an <i>Ethernet driver</i>.
And the NuttX-5.15 release further extended the support with a functional <i>USB driver</i> and <i>SPI-based micro-SD</i>.
Verified configurations are now available for the NuttX OS test,
for the NuttShell with networking and microSD support(NSH, see the <a href="ttp://www.nuttx.org/NuttShell.html">NSH User Guide</a>),
for the NuttX network test, for the <a href="http://acme.com/software/thttpd">THTTPD</a> webserver,
and for USB serial and USB storage examples.
A driver for the <i>Nokia 6100 LCD</i> and an NX graphics configuration for the Olimex LPC1766-STK have been added.
However, neither the LCD driver nor the NX configuration have been verified as of the the NuttX-5.15 release.
</p>
<p>
<b>Development Environments:</b>
1) Linux with native Linux GNU toolchain, 2) Cygwin with Cygwin GNU toolchain, or 3) Cygwin
with Windows native toolchain (CodeSourcery or devkitARM). A DIY toolchain for Linux
or Cygwin is provided by the NuttX
<a href="http://sourceforge.net/project/showfiles.php?group_id=189573&package_id=224585">buildroot</a>
package.
</p>
</ul>
</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>
<ul>
<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>
</ul>
</td>
</tr>
<tr>
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Frescale M68HSC12</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<b>MC9S12NE64</b>.
This port uses the Freescale DEMO9S12NE64 Evaluation Board with a GNU arm-elf toolchain* under Linux or Cygwin.
</p>
<ul>
<p>
<b>STATUS:</b>
This port only fragmentary as of NuttX-5.0. Some initial pieces appear in that
release, but much more is needed. Time permitting, the HCS12 port may be available
int NuttX5.1.
</p>
</ul>
</td>
</tr>
<tr>
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Atmel AVR32</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<b>AV32DEV1</b>.
This port uses the www.mcuzone.com AVRDEV1 board based on the Atmel AT32UC3B0256 MCU.
This port requires a special GNU avr32 toolchain available from atmel.com website.
This is a windows native toolchain and so can be used only under Cygwin on Windows.
</p>
<ul>
<p>
<b>STATUS:</b>
This port is has completed all basic development, but there is more that needs to be done.
All code is complete for the basic NuttX port including header files for all AT32UC3* peripherals.
The untested AVR32 code was present in the 5.12 release of NuttX.
Since then, the basic RTOS port has solidified:
<ul>
<li>
The port successfully passes the NuttX OS test (examples/ostest).
</li>
<li>
A NuttShell (NSH) configuration is in place (see the <a href="http://www.nuttx.org/NuttShell.html">NSH User Guide</a>).
Testing of that configuration has been postponed (because it got bumped by the Olimex LPC1766-STK port).
Current Status: I think I have a hardware problem with my serial port setup.
There is a good chance that the NSH port is complete and functional, but I am not yet able to demonstrate that.
At present, I get nothing coming in the serial RXD line (probably because the pins are configured wrong or I have the MAX232 connected wrong).
</li>
</ul>
The basic, port (including the verified examples/ostest configuration) was be released in NuttX-5.13.
A complete port will include drivers for additional AVR32 UC3 devices -- like SPI and USB --- and will be available in a later release,
time permitting.
</p>
</ul>
</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>
<ul>
<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>
</ul>
</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>
<ul>
<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>
</ul>
</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>
<ul>
<p>
<b>STATUS:</b>
The initial release of support for the z16f was made available in NuttX version 0.3.7.
</p>
</ul>
</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>
<ul>
<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>
</ul>
</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>
<ul>
<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>
<ul>
</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>
<ul>
<p>
<b>STATUS:</b>
This port is complete and stable to the extent that it can be tested
using an instruction set simulator.
</p>
<ul>
</td>
</tr>
<tr>
<td><br></td>
<td><hr></td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<b>XTRS: TRS-80 Model I/III/4/4P Emulator for Unix</b>.
A very similar Z80 port is available for <a href="http://www.tim-mann.org/xtrs.html">XTRS</a>,
the TRS-80 Model I/III/4/4P Emulator for Unix.
That port also uses the <a href="http://sdcc.sourceforge.net/">SDCC</a> toolchain
under Linux or Cygwin (verified using version 2.6.0).
</p>
<ul>
<p>
<b>STATUS:</b>
Basically the same as for the Z80 instruction set simulator.
This port was contributed by Jacques Pelletier.
</p>
<ul>
</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 <code>make</code> + 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 <code>make</code> + 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 <code>make</code> + 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 <code>make</code> + 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 <code>make</code> + 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
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>
<p><small>
NOTE: In this environment, it should be possible to use the NTFS <code>mklink</code> command to create links.
This should only require a minor modification to the build scripts (see <code>tools/winlink.sh</code> script).
</small></p>
<li>
<b>Dependencies</b>
NuttX uses the GCC compiler's <code>-M</code> option to generate make dependencies. These
dependencies are retained in files called <code>Make.deps</code> throughout the system.
For compilers other than GCC, there is no support for making dependencies in this way.
For Windows native GCC compilers, the generated dependencies are windows paths and not
directly usable in the Cygwin make. By default, dependencies are surpressed for these
compilers as well.
</li>
<p><small>
NOTE: dependencies are suppress by setting the make variable <code>MKDEPS</code> to point
to the do-nothing dependency script, <code>tools/mknulldeps.sh</code>.
Dependencies can be enabled for the Windows native GCC compilers by setting
<code>MKDEPS</code> to point to <code>$(TOPDIR)/tools/mkdeps.sh --winpaths $(TOPDIR)</code>.
</small></p>
</ul>
<p>
<b>Supported Windows Native Toolchains</b>.
At present, only the Zilog Z16F, z8Encore, and eZ80Acclaim ports use a non-GCC native Windows
toolchain(the Zilog ZDS-II toolchain).
Support for Windows native GCC toolchains (CodeSourcery and devkitARM) is currently implemented
for the NXP LPC214x, STMicro STR71x, and Luminary LMS6918 ARM ports.
(but could easily be extended to any other GCC-based platform with a small effort).
</p>
</td>
</tr>
<tr>
<td valign="top"><img height="20" width="20" src="favicon.ico"></td>
<td bgcolor="#5eaee1">
<b>Other Environments?
Windows Native <code>make</code> + Windows Native Toolchain?</b>
</td>
</tr>
<tr>
<td><br></td>
<td>
<p>
<b>Environment Dependencies</b>.
The primary environmental dependency of NuttX are (1) GNU make,
(2) bash scripting, and (3) Linux utilities (such as cat, sed, etc.).
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>
<p>
<b>GNUWin32</b>.
For example, with suitable make system changes, it should be possible to
use native GNU tools (such as those from
<a href="http://sourceforge.net/projects/gnuwin32/">GNUWin32</a>)
to build NuttX.
However, that environment has not been used as of this writing.
</p>
<p><small>
NOTE: One of the members on the <a href="http://tech.groups.yahoo.com/group/nuttx/">NuttX forum</a>
reported that they successful built NuttX using such a GNUWin32-based, Windows native environment.
They reported that the only necessary change was to the use the NTFS mklink command to create links
(see <code>tools/winlink.sh</code> script).
</small></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 the 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 the Current Release</a>
</td>
</tr>
</table>
<ul><pre>
5.15 2010-12-12 Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
* net/uip/uip_tcpaddsend.c and net/send.c -- Another place where the TCP sequence
number problem &quot;fixed&quot; in 5.14 might occur.
* net/send.c -- Check if the destination IP address is in the ARP table. If
not, then don't consider the packet sent. It won't be, an ARP packet will go
out instead. This improves behavior, for example, on the first GET request
from a browser.
* arch/arm/src/lpc17xx/lpc17_emacram.h and lpc17_allocateheap.c -- The Ethernet
logic was using all of AHB SRAM Bank0 for Ethernet packet buffers (16Kb). An
option was added to limit the amount of SRAM used for packet buffering and to
re-use any extra Bank0 memory for heap. configs/olimex-lpc1766stk/nettest
now uses only 8Kb at the beginning of Bank0; the 8Kb at the end of Bank0 is
included in the heap
* arch/arm/src/lpc17xx/lpc17_ssp.c -- Fix compilation errors when SSP1 is
selected.
* configs/olimex-lpc1766stk/nsh -- Enable network and SD/MMC card support in
NSH. Networking and telnetd interface as well as SPI-based microSD are
now functional.
* examples/nsh/nsh_netinit.c -- Fix NSH bug. If CONFIG_NET is selected, but
CONFIG_EXAMPLES_NSH_TELNETD is not selected, then the network is never
initialized and bad things happen if you try to ping.
* drivers/lcd -- Add header files for the Phillips PCF8833 LCD controller and
for the Epson S1D15G10 LCD controller. A driver for the Nokia 6100 LCD is
coming.
* include/nuttx/spi.h and almost all other SPI files -- Added an optional
cmddata() method to the SPI interface. Some devices require an additional
out-of-band bit to specify if the next word sent to the device is a command
or data. This is typical, for example, in &quot;9-bit&quot; displays where the 9th bit
is the CMD/DATA bit. The cmddata method provides selection of command or data.
* drivers/lcd/p14201.c -- Now uses the cmddata() method of the SPI interface.
* arch/arm/src/lpc17xx/lpc17_usbdev.c -- LPC17xx USB driver now appears to
to be fully functional. examples/usbstorage configuration verified (the
examples/usbserial configuration is untested).
* drivers/usbdev/usbserial.c and usbstorage.c -- All USB class drivers need
to call DEV_CONNECT() when they are ready to be enumerated. That is,
(1) initially when bound to the USB driver, and (2) after a USB reset.
* drivers/lcd/nokia6100.c -- A driver for the Nokia 6100 LCD. This driver
has not be verified as of the initial check-in.
* configs/olimex-lpc1766stk/nx -- A NX graphics configuration for the Olimex
LPC1766-STK board using the Nokia 6100 LCD driver. This configuration has
not been verified as of the initial check-in.
* include/nuttx/spi.h -- the SPI_SETBITS macro was calling the setmode method.
This is a very important bug-fix in some usages.
pascal-2.0 2009-12-21 Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
* Updated to use standard C99 types in stdint.h and
stdbool.h. This change was necessary for compatibility
with NuttX-5.0 (any beyond).
buildroot-1.8 2009-12-21 &lt;spudmonkey@racsa.co.cr&gt;
* configs/cortexm3-defconfig-4.3.3: Added support for NuttX NXFLAT
tools.
* configs/arm7tdmi-defconfig-4.3.3: Update to arm7tdmi-defconfig-4.2.4.
Also builds NuttX NXFLAT tools.
* configs/m68hc12-defconfig-4.3.3: Update to m68ch11-defconfig.
* configs/m68hc12-defconfig-3.4.6: There are problems building GCC
4.3.3 for the hc12.
* configs/m32c-defconfig-4.2.4: Added genromfs
* configs/m32c-defconfig-4.3.3: Update to m32c-defconfig-4.2.4
</pre></ul>
<table width ="100%">
<tr bgcolor="#e4e4e4">
<td>
<a name="pendingchanges">Unreleased Changes</a>
</td>
</tr>
</table>
<ul><pre>
nuttx-5.16 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
pascal-2.1 2010-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
buildroot-1.9 2010-xx-xx <spudmonkey@racsa.co.cr>
* configs/arm926t-defconfig-4.3.3: update arm926t-defconfig-4.2.4
* configs/arm926t-defconfig-nxflat: NXFLAT-only configuration for
arm926
* toolchain/gdb/gdb.mk - Remove ncurses dependency from gdb_target target.
* toolchain/gdb/gdb.mk - Added --disable-werror to GDB configuration line.
GDB 6.8 won't build because the tarball was released with -Werror enabled and
the build stops on the first warning.
</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="NuttXNxFlat.html">NXFLAT</a> Binary Format</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="NuttXDemandPaging.html">Demand Paging</a></td>
</tr>
<tr>
<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
<td><a href="README.html">NuttX README Files</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 Cortex-M3 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>
<li>Eagle-100 is a trademark of <a href=" http://www.micromint.com/">Micromint USA, LLC</a>.
<li>LPC2148 is a trademark of NXP Semiconductors.</li>
<li>TI is a tradename of Texas Instruments Incorporated.</li>
<li>UNIX is a registered trademark of The Open Group.</li>
<li>VxWorks is a registered trademark of Wind River Systems, Incorporated.</li>
<li>ZDS, ZNEO, Z16F, Z80, and Zilog are a registered trademark of Zilog, Inc.</li>
</ul>
<p>
NOTE: NuttX is <i>not</i> licensed to use the POSIX trademark. NuttX uses the POSIX
standard as a development guideline only.
</p>
</small>
</body>
</html>
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