ReleaseNotes

nuttx-0.1.0
^^^^^^^^^^^

This is the initial.  This initial includes the complete NuttX RTOS
with support for the Linux user mode simulation and the TI TMS320C5471
(Arm7) processor.  Partial support for the 87C52 is included.

This release has been verified on both the Linux user-mode and C5471
platforms using the test program under examples/ostest.  Test results
for the C5471 can be found in arch/c5471/doc/test-results.txt.

This tarball contains a complete CVS snapshot from March 9,2007.

nuttx-0.1.1
^^^^^^^^^^^

This is the second release of NuttX.  This release includes the following.
See the ChangeLog for more detailed description of the changes.

(1) General OS bugfixes (see the ChangeLog for details),
(2) bugfixes for the TI TMS320C5471 (Arm7) platform (see
    the ChangeLog)
(3) Complete support for the 87C52. (However, the 87C52
    release is not stable enough for general usage).
(4) Added the beginning of a shell call NuttShell (nsh)

This release has been verified on the Linux user-mode platform, the
Spectrum Digital TMS320C5471 EVM, and the PJRC 87C52 development board
using the test program under examples/ostest.

STATUS: The development status remains as ALPHA until further testing
is performed.

This tarball contains a complete CVS snapshot from March 14, 2007.

nuttx-0.1.2
^^^^^^^^^^^

This is the third release of NuttX.  This release is
primarily a bugfix release with minimal new features.  See
the ChangeLog for a more detailed description of the 
changes.

(1) Several important OS and ARM7 bugfixes,
(2) opendir(), closedir(), readdir(), etc. added
(3) Added C5471 watchdog timer.
(4) Created a shareable, serial driver.
(5) Added 'ls' command to NuttShell (nsh)
(6) Added a test of the round robin scheduler

This release has been verified on the Linux user-mode 
platform, the  Spectrum Digital TMS320C5471 EVM using the
test program under examples/ostest.

This tarball contains a CVS snapshot from March 19, 2007.

nuttx-0.2.1
^^^^^^^^^^^

This is the fourth relese of NuttX.  This release adds adds
support for a new platform, restructures many header files,
and adds a few new features:

(1) Support for Neuros OSD / DM320
(2) Restructuring of header files for better POSIX compliance
(3) Added kill()
(4) Added POSIX timers
(5) bugfixes and documentation updates

This release has been verified on the Linux user-mode 
platform, the  Spectrum Digital TMS320C5471 EVM, and the 
Neuros OSD  using the test program under examples/ostest.  Because
of the stability of these tests, the project status
has been upgraded to 'beta.'

This tarball contains a complete CVS snapshot from March 22, 2007.

nuttx-0.2.2
^^^^^^^^^^^^

This is the fifth release of NuttX.  There is no major new
functionality in this release.  This release adds support
for new pthread barrier APIs, changes the directory
structure, to better handle different board configurations
using the same processor architecture, and corrects a few
defects.

See the ChangeLog for a complete list of changes.

This release has been verified on the Linux user-mode
platform and the Neuros OSD using the test program under
examples/ostest.  There are no known, critical defects but
the project development status remains at 'beta' status
pending further test and evaluation.

This tarball contains a complete CVS snapshot from
March 26, 2007.

nuttx-0.2.3
^^^^^^^^^^^^

This is the sixth release of NuttX.  This release is
primarily a bugfix release.  Numerous problems were fixed
as detailedin the change log.  New functionality includes
support for timed message queues.

See the ChangeLog for a complete list of changes.

This release has been verified on the Linux user-mode 
platform and the Neuros OSD using the test program under
examples/ostest. The results of the testing is available in
the source tree under configs/ntosd-dm320/doc/test-results.
There are no known, critical defects but the project
development status remains at 'beta' status pending further
test and evaluation.

This tarball contains a complete CVS snapshot from March 29,
2007.

nuttx-0.2.4
^^^^^^^^^^^^

This is the 7th release of NuttX.  This release is only to roll out
build changes to better support different SoC's that use the same
processor architecture.  In particular, the two existing ARM architectures,
c5471 and DM320 were combined into a single ARM directory.  This was done
in preparation for an LPC2148 port that is currently in progress.  There
is NO new functionality or significant bufixes in this release.

See the ChangeLog for a complete list of changes.

This release has been verified on the Linux user-mode platform
and the Neuros OSD using the test program under examples/ostest.
The results of the testing is available in the source tree under
configs/ntosd-dm320/doc/test-results and under configs/sim/doc/test-results.
There are no known, critical defects but the project development status
remains at 'beta' status pending further test and evaluation.

This tarball contains a complete CVS snapshot from April 28, 2007.

nuttx-0.2.5
^^^^^^^^^^^^

This is the 8th release of NuttX.  This release includes:

(1) Several bug fixes
(2) Initial support for FAT filesystems.  Testing has not
    been exhaustive and some functionality is missing
   (mkdir, stat, unlink chmod, and rename functionality is 
    not yet implemented).
(3) Support for the NXP lpc2148 processor is included but
    is untested as of this writing.  The current 
    implementation includes only support for serial console
    and timer interrupt.

See the ChangeLog for a complete list of changes.

This release has been verified only on the Linux user-mode
platform.

This tarball contains a complete CVS snapshot from May 19,
2007.

nuttx-0.2.6
^^^^^^^^^^^

This is the 9th release of NuttX.  This is primarily a
bugfix release to correct a number of problems introduced
with the 0.2.5 release. This release does include some FAT
filesystem extensions including unlink(), mkdir(), rmdir(),
rename(), opendir(), closedir(), readdir(), seekdir(),
telldir(), rewindir().  There are some pending FAT changes
that did not make it into this release including stat(),
truncate(), and long file names.

See the ChangeLog for a complete list of changes.

This release has been verified only on the Linux user-mode
platform.

This tarball contains a complete CVS snapshot from May 26,
2007.

nuttx-0.2.7
^^^^^^^^^^^

This is the 10th release of NuttX.  This is primarily a bugfix releaseto correct a
number of problems reported to me (thanks Didier!). This release does include the
final changes complete the FAT filesystem logic including stat(), tatfs(), and non-
standard APIs to manage FAT
attributes.  At present,FAT long file names and file trunction() are still not
supported.

See the ChangeLog for a complete list of changes.

This release has been verified only on the Linux user-mode platform.

This tarball contains a complete CVS snapshot from June 9, 2007.

nuttx-0.2.8
^^^^^^^^^^^

This is the 11th release of NuttX.  This release (1) corrects important bugs
in opendir and realloc, (2) adds support for environment variables, (3) adds
several new C library interfaces, and (4) extends several example programs.

See the ChangeLog for a complete list of changes.

This release has been verified only on the Linux user-mode platform.

This tarball contains a complete CVS snapshot from July 2, 2007.

nuttx-0.3.0
^^^^^^^^^^^

This is the 12th release of NuttX.  This release includes the initial
integration of a network subsystem and the uIP TCP/IP stack into NuttX
(see http://www.sics.se/~adam/uip/index.php/Main_Page).  Also included
is a device driver for the Davicom DM90x0 ethernet controller.

This integration is very preliminary.  Only a small portion of the
network functionality has been integrated and there are a number of
open issues (see the TODO file).  The network subsystem is pre-alpha
at this point in time.  I expect that it will stabilize and mature
over the next few releases.

The baseline functionality of NuttX continues to mature and remains at
post-beta (as long as the network is not used).

See the ChangeLog for a complete list of changes.

This release has been verified only on the Neuros OSD (DM320 ARM9)
platform using the DM90x0 driver.

This tarball contains a complete CVS snapshot from November 6, 2007.

nuttx-0.3.1
^^^^^^^^^^^

This is the 13th release of NuttX and the second release containing
the integration of a network subsystem and the uIP TCP/IP, UDP, and
ICMP stacks into NuttX (see http://www.sics.se/~adam/uip/index.php/Main_Page).

Many network-related problems have been fixed and the implementation
has matured significantly.  However, the level of network reliability
is probably still at the pre-alpha or early level.  It is sufficiently
complete that you may begin to perform some network integration and
is exepcted to achieve beta level of reliability over the next few
releases.

The baseline functionality of NuttX continues to mature and remains at
post-beta (as long as the network is not used).

See the ChangeLog for a complete list of changes.

This release has been verified only on the Neuros OSD (DM320 ARM9)
platform using the DM90x0 driver.

This tarball contains a complete CVS snapshot from November 19, 2007.

nuttx-0.3.2
^^^^^^^^^^^

This is the 14th release of NuttX and the 3rd release containing
the integration of a network subsystem and the uIP TCP/IP, UDP, and
ICMP stacks into NuttX (see http://www.sics.se/~adam/uip/index.php/Main_Page).

Many network-related problems have been fixed and the implementation
has matured significantly.  This release consists of:

o TCP-related bug-fixes
o TCP performance improvements
o Initial UDP integration
o Initial uIP micro webserver integration

See the ChangeLog for a complete list of changes.

The level of network reliability is at alpha level is expected to
achieve beta level of reliability over the next few releases.

The baseline functionality of NuttX continues to mature and remains at
post-beta.

This release has been verified only on the Neuros OSD (DM320 ARM9)
platform using the DM90x0 driver.

This tarball contains a complete CVS snapshot from November 23, 2007.

nuttx-0.3.3
^^^^^^^^^^^

This is the 15th release of NuttX and the 4th release containing
the integration of a network subsystem and the uIP TCP/IP, UDP, and
ICMP stacks into NuttX (see http://www.sics.se/~adam/uip/index.php/Main_Page).

Many network-related problems have been fixed and the implementation
has matured significantly.  This release consists of:

o TCP-related bug-fixes for disconnecting sockets
o Correction of some TCP read-ahead logic
o TCP performance improvements
o Misc. additions and cleanup (See the ChangeLog for a complete list of
  changes).

The level of network reliability is at an early beta release level.  The
baseline functionality of NuttX continues to mature and remains at
post-beta. Open network-related issues include only:

o Some minor unimplemented BSD socket functionality,
o Thread safety issues: the same socket cannot be used concurrently on
  different threads.
o Pending design changes necessary to support multiple network interfaces.
o IPv6 support is incomplete.

This release has been verified only on the Neuros OSD (DM320 ARM9)
platform using the DM90x0 driver. Any feedback for improving the network
reliability/performance would be greatly appreciated.

This tarball contains a complete CVS snapshot from November 28, 2007.

nuttx-0.3.4
^^^^^^^^^^^

This is the 16th release of NuttX and the 5th release containing
the integration of a network subsystem and the uIP TCP/IP, UDP, and
ICMP stacks into NuttX (see http://www.sics.se/~adam/uip/index.php/Main_Page).

This release is primarily a bug-fix release.  New features include
only:

o TELNET front-end to NSH,
o DHCPC server functionality, and
o C5471 Ethernet driver.

Numerous network related problems were fixed related to DHCPC, UDP
input processing, UDP broadcast, send timeouts, and bad compilation when
uIP is compiled at high levels of optimization.

The level of network reliability is at a strong beta release level.  The
baseline functionality of NuttX continues to mature and remains at
post-beta or production level.

Parts of this release were verified only on the Neuros OSD (DM320 ARM9)
platform using the DM90x0 Ethernet driver and other parts on the Spectrum
Digital C5471 EVM using the C5471 Ethernet driver. Any feedback about bugs
or suggestions for improving the network reliability/performance would be
greatly appreciated.

This tarball contains a complete CVS snapshot from December 10, 2007.

nuttx-0.3.5
^^^^^^^^^^^

This is the 17th release of NuttX this release is primarily a bug-fix
release and intended to synchronize with the current CVS contents.  See
the ChangeLog for a detailed list of changes and fixes.

This release were verified only on the Spectrum Digital C5471 EVM using
the C5471 Ethernet driver. Any feedback about bugs or suggestions for
improvement would be greatly appreciated.

This tarball contains a complete CVS snapshot from December 18, 2007.

nuttx-0.3.6
^^^^^^^^^^^

This is the 18th release of NuttX.  This release contains on a few
changes.  The primary purpose of this release is to synchronize with
the release of the pascal-0.1.0 add-on package.

This release of NuttX includes the following changes:

* Fixes for use with SDCC compiler
* Added a simulated z80 target (arch/z80)
* Fix deadlock errors when using stdio but with no buffering
* Add support for the add-on Pascal P-Code interpreter (pcode/)
  (see the pascal-0.1.0 package)

This release were verified only on the simulated Z80 and and host
simulation targets.  As usual, any feedback about bugs or suggestions
for improvement would be greatly appreciated.

This tarball contains a complete CVS snapshot from January 6, 2007.

====

There was an error in the initial 0.3.6 release that prevented
a successful build unless the Pascal add-on was present.  The
tarball was patched to include the fix.  Make sure that you download
the nuttx-0.3.6.1.tar.gz version to avoid this problem.

nuttx-0.3.7
^^^^^^^^^^^

This is the 19th release of NuttX.  This release includes the
preliminary port of NuttX to the ZiLOG z16f 16-bit microcontroller.
This port was verified using the ZiLOG z16f2800100zcog Development
and the ZiLOG ZDS-II toolchain. See http://www.zilog.com for
further information.

I emphasize that this is a preliminary release of the z16f port and
is only alpha or, perhaps, pre-alpha quality as of this writing.
There are a list of known issues in the TODO file in the root of
the NuttX directory.  The overall quality of NuttX (excluding the
z16f port) continues to improve beyond the late beta level.

The z16f port required numerous changes to NuttX to handle:

* NEAR and FAR addressing, and
* Use of a Windows native toolchain in a Cygwin build environment.

In addition to the z16f port, at least one very critical bug was
found and corrected in NuttX:  The thread-specific errno value of one
task was being randomly trashed when a different thread exitted.

This release were verified on the ZiLOG z16f2800100zcog, Neuros OSD
(ARM9), and the simulation platforms.  As usual, any feedback about bugs
or suggestions for improvement would be greatly appreciated.

This tarball contains a complete CVS snapshot from January 31, 2008.

nuttx-0.3.8
^^^^^^^^^^^

This is the 20th release of NuttX.  This is a minor bugfix release.
It corrects a few minor problems, adds a few minor features, and
continues the integration of the ZiLOG Z18F and of the Pascal P-Code
add-on.  This release is synchronized with the release of Pascal-0.1.2.

This tarball contains a complete CVS snapshot from February 10, 2008.

nuttx-0.3.9
^^^^^^^^^^^

This is the 21st release of NuttX.  This is a minor future enhancement
release.  This release includes support for the ZiLOG Z8Encore! micro-
controller.  Also included is the initial framework for support for
the Z80, XTRS platform (http://www.tim-mann.org/xtrs.html).

This released has been verified only on the ZiLOG ZDS-II Z8Encore!
chip simulation.

This tarball contains a complete CVS snapshot from March 9, 2008.

nuttx-0.3.10
^^^^^^^^^^^^

This is the 22nd release of NuttX.  This is an important bug fix release.
This release incorporates fixes to correct critical list handling errors
in task shutdown logic: One in timer deletion logic (timer_delete.c) and one
in stream logic (lib_init.c).  This release also includes support to ZiLOG EZ80Acclaim
microcontrooler (EZ80F91 chip) and configurations fot the ZiLOG z8f64200100kit (Z8F6423)
and ez80f0910200kitg (EZ80F091) development kit.

nuttx-0.3.11
^^^^^^^^^^^^

This is the 23rd release of NuttX.  This is another important bugfix release.
This releases fixes several bugs:

* Two POSIX timer bugs: a memory leak as well a fatal sequencing error.
* Several FAT filesystem errors.
* A deadlock that can occur in opendir()

A few new features were also added:

* Support for recursive mutexes
* Added a RAM disk block driver
* The host simulator no longer uses direct Linux system calls and now also works on Cygwin.
* The OS test was strengthen and now runs as an endurance test

These changes were verified only on the Host simulator under Cygwin.  Please report
any errors to me.

This tarball contains a complete CVS snapshot from June 1, 2008.

nuttx-0.3.12
^^^^^^^^^^^^

This is the 24th release of NuttX.  This release includes some minor bugfixes as well
as a few new features.  Bugs fixed include:

* Corrected an error in recursive mutex implementation.
* task_create() was only dup'in the first three file descriptors.
* Fixed driver open reference counting errors in dup(), dup2(), and exit().
* Fixed error handling logic in fflush().

New features were also added:

* Pipes and pipe() API
* FIFOs and mkfifo() API
* mkfatfs() API can be used to format FAT file systems.

These changes were verified only on the Host simulator under Cygwin.  Please report
any errors to me.

This tarball contains a complete CVS snapshot from August 10, 2008.

nuttx-0.3.13
^^^^^^^^^^^^

This is the 25th release of NuttX.  This release includes some important bugfixes as well
as a few new features.  Bugs fixed include:

* Fixed problems with Cygwin-based console input.  NSH now works with the Cygwin simulator.
* sched_get_priority_max/min returned error on SCHED_RR
* Corrected detection of End-of-File in fgets()
* Fixed an error in opendir() that could cause an assertion to fail inappropriately.
* Corrected an error in the FAT that caused files opened for writing with O_APPEND to fail.
* Fix error in getopt() when called with argc==1
* Fix error in stat() when used on the root directory
* Fixed a critical bug that effects the way that environment variables are shared amongst
  pthreads.
* uIP port now supports multi-threaded, concurrent socket access.  So, for example, one
  thread can be reading from a socket while another is writing to the socket.

New features were also added:

* New OS APIs: chdir() and getcwd()
* The Nuttx shell (NSH) has been extended in many ways.
  - New commands: mkfatfs, mkfifo, sleep, usleep, nice, sh, cd, and pwd commands
  - New memory inspection commands and heap usage commands
  - New capabilities: Execution of commands in background, execution of simple scripts,
    redirection of command output, last command status ($?)
  - Now supports if-then[-else]-fi construct
  - and other features as noted in the ChangeLog.

These changes were verified only on the Host simulator under Cygwin and under Linux and
also on the Neuros OSD (ARM9).  Please report any errors to me.

This tarball contains a complete CVS snapshot from September 1, 2008.

nutt-0.3.14
^^^^^^^^^^^

This is the 26th release of NuttX.  This release includes some important bugfixes as well
as a few new features.  Critical bugs fixed include:

  FAT FS:
  * Fixed several critical bugs with regard to fat reading and writing and FAT12
    accesses.  Basically the FAT FS only worked with my tiny test files and test
    cases.  A lot of stronger FAT tested is still needed!!
  * Fixed another FAT bug in implementation of FAT lseek; this prohibit correct
    random access to large files.

  Network:
  * Corrected a critical bug that may prevent recvfrom from receiving packets from
    most remote UDP port numbers.
  * Corrected an error in multi-threaded socket handling in send() and sendto().
    Outgoing data could overwrite incoming data.
  * Corrected IP checksum calculation in ICMP and UDP message send logic.
  * Corrected an error in send() timeout logic.

New features were also added:

  Network:
  * Added support for application access to ICMP protocol stacks; Added
    ping request logic (net/uip).
  * Added basic TFTP client logic (netutils/tftpc).

  NuttShell (NSH):
  * New commands: 'test', '[', 'ping', 'mkrd', 'xd', andTFTP 'get' and 'put'
    commands (See the new NuttShell User Guide for additional information).

Other less critical bugs were also fixed and other less important features were
were added (See the ChangeLog for details).

These changes were verified only on the Neuros OSD (ARM9).  Please report any errors to me.

This tarball contains a complete CVS snapshot from September 8, 2008.

nutt-0.3.15
^^^^^^^^^^^

This is the 27th release of NuttX.  This release includes some new features:

  * Adds support for the ROMFS filesystem
  * ROMFS supports mmap() to provide eXecute In Place (XIP) capability
  * NuttShell (NSH) can be configured to use ROMFS to provide a tiny read-only
    filesystem with a startup script in /etc.
  * Completed the basic port of the NXP LPC2148 on the mcu123.com board.
    The basic port includes successful booting, timer interrupts, serial console,
    succesfully passing the examples/ostest, and a NuttShell (NSH) configuration.

These changes were verified only on the mcu123.com NXP LPC2148 board.  Please report
any errors to me.

This tarball contains a complete CVS snapshot from September 20, 2008.

nutt-0.3.16
^^^^^^^^^^^

This is the 28th release of NuttX.  This release includes the first support for
USB in NuttX.  A set of USB APIs were added to support USB device controller
drivers and bindings to USB device class drivers.  The form of the interface
was inspired by the Linux Gadget APIs.

At present USB device controller drivers are included for:

  * The NXP LPC214x.  This driver has been verified and is an early alpha
    stage in quality.
  * TI DM320.  Coding for this driver is complete but it is completely untested
    as of this release.

A controller-independent class driver is also included for:

  * USB serial class device driver (emulates the Prolific PL2303 serial-to-USB
    adaptor).  This drver has only been verified with the Linux host PL2303
    driver.

Other new features include:

  * Add an option to set aside a separate stack for interrupt handling (ARM only).
    This is useful when memory is constrained, there are multiple tasks, and
    the interrupt stack requirement is high (as when USB is enabled).

A few bugs were also fixed:

  * Fixed the frequency of system timer interrupts in the NXP LPC214x port
    (off by 20x in nuttx-0.3.15)
  * Fixed serial driver bugs related to (1) open counts and (2) recognizing
    O_NONBLOCK on read.
  * Fixed an error in read(); it was not setting the errno on errors returned
    from the driver.

These changes were verified only on the mcu123.com NXP LPC2148 board using with
a Linux host.  Please report any errors to me.

This tarball contains a complete CVS snapshot from Octobor 10, 2008.

UPDATE
^^^^^^
This release does not build for the ARM target when USB is disabled.  Here is the fix:

Index: arch/arm/src/common/up_internal.h
===================================================================
RCS file: /cvsroot/nuttx/nuttx/arch/arm/src/common/up_internal.h,v
retrieving revision 1.13
diff -u -r1.13 up_internal.h
--- arch/arm/src/common/up_internal.h   6 Oct 2008 16:20:52 -0000       1.13
+++ arch/arm/src/common/up_internal.h   13 Oct 2008 20:48:21 -0000
@@ -200,7 +200,8 @@
 extern void up_usbinitialize(void);
 extern void up_usbuninitialize(void);
 #else
-# define up_netinitialize()
+# define up_usbinitialize()
+# define up_usbuninitialize()
 #endif

 #endif /* __ASSEMBLY__ */

nuttx-0.3.17
^^^^^^^^^^^^

This is the 29th release of NuttX.  This release includes the additional support for
USB in NuttX.  The following new features were added:

  * Added support for SPI-based MMC/SD cards (with an SPI driver for the NXP LPC214x).
  * Added USB storage class device side driver (BBB)
  * Added an example that demonstrates the USB storage class by exporting the SPI
    based MMC/SD card on the NXP LPC214x.

This is an early alpha release of these drivers.  At present they only work with
debug features enabled so there are probably some race conditions that occur only
with debug features disabled (anyone out there with a USB analyzer?  I would love
to know what is happening).

Several important bugs were also fixed in the FAT file system, USB serial driver and
NXP LPC214x USB controller driver (see the ChangeLog for details).

These changes were verified only on the mcu123.com NXP LPC2148 board using a Linux
development environment.  USB testing was performed using both a Linux host and a WinXP
host.  Please report any errors to me.

This tarball contains a complete CVS snapshot from Octobor 28, 2008.

nuttx-0.3.18
^^^^^^^^^^^^

This is the 30th release of NuttX.  This release includes two partially completed
ports, several new features, and a couple of important bug fixes.  The two partially
completed ports are:

	* The STMicro STR71x processor and configuration for the Olimex STR-P711
	  board.
	* The Hitachi SH-1 using the SH1_LCEVB1 (SH-1/US7032EVB1) board

Progress on these ports is stalled (as detailed in the ChangeLog).

The new features focus primarily on management of block devices and extensions of
the NuttShell (NSH).  These include:

	* A loop device that converts a file into a block device.
	* A block to character (BCH) driver that  allow access a block device as
	  if it were character device.
	* Added strcasecmp() and strncasecmp() libc functions.
	* Added the 'dd' and 'losetup' commands to NSH. These commands (along
	  with mkfatfs and mount), give good managment of filesystems on the target.

Several bugs were fixed, the most important of which are:

	* Fixed a race condition workaround delay in LPC214X SPI logic.  This was also
	  the cause of some bad MMC/SD performance on that platform.
	* Fixed a recently introduced FAT file system problem: It would mount a (invalid)
	  FAT file system even if the medium is not formatted!
	* Corrected two iother important errors in the FAT lseek implementation:
	  (1) the sectors-per-cluster value was being reset to "1" and (2) important
	  lseek logic was omitted when the seek position was zero.

The FAT filesystem has had many bugs fixed in it and, I think, is now maturing
and becoming stable.

These changes were verified only on the mcu123.com NXP LPC2148 board, the Hitachi
SH1_LCEVB1 board, and the Linux simulator, all using a Linux development environment.
Please report any errors to me.

This tarball contains a complete CVS snapshot from November 16, 2008.

nuttx-0.3.19
^^^^^^^^^^^^

This is the 31st release of NuttX.  This release includes the following new feature:

	* Add poll() and select() APIs that may be used to monitor for data
	  availability on character devices or TCP/IP sockets.
	* Implemented support TCP/IP connection backlog.  This allows select to wake-up
	  on new connections to a listener socket.
	* Added definition of a framebuffer driver and implement framebuffer drivers
	  for the simulated platform and the TI DM320 (untested as of the inital check-in).
	* Partially developed a graphics framework based on the framebuffer drivers,
	  however, this will not be ready for use for a few more release.  Currently
	  this includes only a few color conversion routines and some rasteizing functions.
	  A tiny windowing system is under development but not ready for check-in yet.
	* Added support for fixed precision math.
	* Added support for outgoing multicast packets.

Several bugs were fixed, the most important of which are:

	* Fixed an important bug in the TCP/IP buffering logic.  When TCP/IP read-ahead is enabled
	  and not recv() is in-place when a TCP/IP packet is received, the packet is placed into
	  a read-ahead buffer.  However, the old contents of the read-ahead buffer were not being
	  cleared and old data would contaminate the newly received buffer.
	* Changed the behavior of the serial driver read.  It now returns data as it
	  is available rather than waiting for the full requested read size.  This
	  makes functions like fgetc() work much more smoothly.

These changes were verified only on the Neuros OSD (ARM9) using a Linux development
environment. Please report any errors to me.

This tarball contains a complete CVS snapshot from November 26, 2008.

nuttx-0.4.0
^^^^^^^^^^^

This is the 32nd release of NuttX.  This release adds graphics support and a tiny
windowing subsystem.  That new graphics subystem is documented at
http://nuttx.sourceforge.net/NXGraphicsSubsystem.html.  No other substantial changes
were made.

These changes were verified only on the NuttX simulation platform with X11 windows
simulating a device framebuffer. Please report any errors to me.

The version number was bumped up to 0.4.0 in part to reflect the new graphics subsystem,
but also to recognize the NuttX is approaching complete functionality.  In the 0.3.x
versions, network support was added, Pascal P-code runtime support was added, FAT and
ROMFS filesystems were added, MMC/SD and USB device support were added.  There were
also numerous extensions to the NuttShell, NuttX APIs, and architecture ports.

This tarball contains a complete CVS snapshot from December 6, 2008.

nuttx-0.4.1
^^^^^^^^^^^

This is the 33rd release of NuttX.  This is a minor bugfix release.  The primary reason
for this release is to correct numerous build errors that have accumulated for the ZiLOG
ZDS-II based targets.  All ZDS-II targets now build correctly (but have not been re-tested).
In addition to platform-specific build failures,  release also adds the following features
which were not tested as of the time of the release:

	* Board support fot the ZiLog ez80Acclaim! ez80f910200zco Development Kit
	* ZiLOG eZ80F91 EMAC driver

These changes were verified only on the NuttX simulation platform. Please report any errors
to me.

This tarball contains a complete CVS snapshot from Februrary 6, 2009.

nuttx-0.4.2
^^^^^^^^^^^

This is the 34th release of NuttX.  This release adds no new OS features but does include
support for two new architectures:

	* ez80Acclaim!  Basic support has been integrated and verified for the ez80f910200zcog-d
	  board (eZ80F91-based).  That basic support includes timer interrupts and serial
	  console.  Ongoing work includes an EMAC driver that should be integrated for
	  the next release nuttx-0.4.2.

	  eZ80Acclaim! support has been in the code base for some time, but has only just
	  been integrated due to toolchain issues.

	* Renesas M16C/20.  Support for the Renesas SKP16C20 board has been included in
	  the NuttX source tree.  However, as the eZ80Acclaim!, testing and integration
	  of that port is stalled due to toolchain issues.

These changes were verified only on the ZiLOG eZ80910200zcog-d board. Please report any errors
to me.

This tarball contains a complete CVS snapshot from Februrary 28, 2009.

nuttx-0.4.3
^^^^^^^^^^^

This is the 35th release of NuttX.  This release one important new OS feature and corrects
and extends the eZ80 port:

	* Priority Inheritance.  The basic NuttX waiting logic was extended to
	  support priority inheritance. See the NuttX User Manual for further
	  information: http://www.nuttx.org/NuttxUserGuide.html#priorityinheritance.
	* ez80Acclaim! Corrected several critical, show-stopping bugs on that
	  platform including: Errors in the serial driver intrrupts and an error
	  in the eZ80 table,.
	* eZ80Acclaim!: Completed integration of the eZ80F91 EMAC driver.

These changes were verified only on the ZiLOG eZ80910200zcog-d board and on Cygwin-based
simulation platform in various configurations. Please report any errors to me.

This tarball contains a complete CVS snapshot from March 13, 2009.

nuttx-0.4.4
^^^^^^^^^^^

This is the 36th release of NuttX.  This release focuses on bugfixes and extending
and verifying certain networking features.

	* Important bugs were fixed in NSH, UDP checksum calculation, UDP bind()
	  behavior for port==0, the eZ80Acclaim! EMAC driver, Z80 interrupt handling,
	  and in the C libraries.
	* Testing was extended to further verify the tiny webserver, DHCPD, wget(),
	  and sendmail.

See the Changelog for a detailed description of these changes.

These changes were verified only on the ZiLOG eZ80910200zcog-d board using the
ZDS-II toolchain in Cygwin-based environment. Please report any errors to me.

This tarball contains a complete CVS snapshot from March 29, 2009.

nuttx-0.4.5
^^^^^^^^^^^

This is the 37th release of NuttX.  This release focuses on a few new features.

	* 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
	* Extended I2C and SPI interface definitions
	* 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.

See the Changelog for a detailed description of these changes.

This tarball contains a complete CVS snapshot from April 19, 2009.

nuttx-0.4.6
^^^^^^^^^^^

This is the 38th release of NuttX.  The release features support for the Micromint
Eagle-100 development board.  This board is based around, the Luminary LM3S6918 MCU.
This is the first ARM Cortex-M3 architecture supported by Nuttx. This initial, basic
port includes timer and serial console with configurations to execute the NuttX OS
test and to run the NuttShell (NSH). Work is still underway on this port and current
plans are to have I2C, SSI, MMC/SD, and and Ethernet driver in the 0.4.7 release.

Additional work was done on the MXADS i.MX1 port, however, that work has been set
aside until I complete work on the Eagle-100 (I also need to come up with a 3V power
supply).

Other changes in this release include: Extensions to the SPI interface definition
in order to handle 9-bit interfaces to displays.  Several bugs were fixed (see the
ChangeLog for a complete list of changes).

This tarball contains a complete CVS snapshot from May 19, 2009.

nuttx-0.4.7
^^^^^^^^^^^

This is the 39th release of NuttX.  This release focuses on cleaning up and
extending the Eagle100/LM3S6918 port released in nuttx-0.4.6 and on improved
MMC/SD support.  New features include:

  o Improved reliably and additional drivers for the Eagle-100 board (LM3S6918
    ARM Cortex-M3).  Additional drivers include Ethernet, SSI, and support for
    the on-board LEDs and microSD cards.
  o The SPI-based MMC/SD driver was extended to support SDHC Version 2.xx cards.

In addition, this release includes several important bugfixes for the LM3S6918,
the LPC2148, the SPI-based MMC/SD driver, and to FAT32.  See the ChangeLog for
details of these bugfixes.

This tarball contains a complete CVS snapshot from May 29, 2009.

nuttx-0.4.8
^^^^^^^^^^^

This is the 40th release of NuttX.  This release adds:

  o Support for the Olimex STRP711 board.  That board is based on the STMicro
    STR711 MCU (ARM7TDMI). 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 (NSH) is fully functional with interrupt driven serial console. 
    An SPI driver is available but untested (because the Olimex card slot appears
    to accept only MMC cards; I have only SD cards).  Additional needed: USB and
    driver, MMC integration.

  o Support for the CodeSourcery and devkitARM Windows-native GNU toolchains.
    Makefiles have been modified for the LM3S6918, LPC2148, and STR711 to support
    these toolchains under Cygwin.

This tarball contains a complete CVS snapshot from June 13, 2009.

nuttx-0.4.9
^^^^^^^^^^^

This is the 41st release of NuttX.  This release adds:

	* Support for a new binary format call NXFLAT that can be used to 
	  execute separately linked programs in place in a file system.
	  See http://www.nuttx.org/NuttXNxFlat.html.

	* Several important bugs were files related to networking and ROMFS
	  (see the ChangeLog for a complete list).

This tarball contains a complete CVS snapshot from June 26, 2009.

nuttx-0.4.10
^^^^^^^^^^^

This is the 42nd release of NuttX.  This released focused on the port of Jeff
Poskanzer's THTTPD HTTP server (see http://acme.com/software/thttpd/.).  As of
the 0.4.10 release, that port is still not fully complete and functional.
However, numerous related bug-fixes and functional additions for THTTPD were
added:

	* Several new standard C-library functions (fileno, strstr, strpbrk, fcntl).
	* Improved and extended timing APIs (mktime, gmtime, gmtime_r, gettimeofday,
	  localtime, localtime_r, and strftime)
	* Networking enhancements: recvfrom and accept now work with non-blocking
	  sockets.
	* NXFLAT extensions (exec)
	* Pattern matching logic.
	* And miscellaneous bug fixes (see the ChangeLog for details).

This tarball contains a complete CVS snapshot from August 8, 2009.

nuttx-0.4.11
^^^^^^^^^^^^

This is the 43rd release of NuttX. This release of NuttX incorporates the
verified port of Jeff Poskanzer's THTTPD HTTP server (see http://acme.com/software/thttpd/.).
Many of the key features of THTTPD have been tested on the Micromint Eagle-100
development board (Cortex-M3).  These tests verify:

	* Serving of files from any file system
	* Execution of CGI executable.  This release supports execution of
	  NXFLAT executables on a ROMFS file system (http://www.nuttx.org/NuttXNxFlat.html)

A standard CGI interface is used:  Information is pasted to the CGI program via POST
commands and via environment variables.  CGI socket I/O is redirected to stdin and stdout
so that the CGI program only need to printf() to send its content back to the HTTP
client.

Another value to this THTTPD integration effort has been that THTTPD has provided a very
good test bed for finding NuttX networking bugs.  Several very critical networking bugs
have been fixed with this 0.4.11 release (see the ChangeLog for details).  Networking
throughput has also been greatly improved.  Anyone using NuttX networking should consider
upgrading to this release.

This tarball contains a complete CVS snapshot from September 16, 2009

nuttx-0.4.12
^^^^^^^^^^^^

This is the 44th release of NuttX.  This release adds basic support for the STMicro STM32,
Cortex-M3 MCU.  The specific port is to the STMicro STM3210E-EVAL development board based
around the STM32F103ZET6 MCU.  Some highlights of this port:

	* This basic port includes boot-up logic, interrupt driven serial console, and system
	  timer interrupts.
	* Includes a basic STMicro RIDE7 project that can be used to perform basic STM32
	  board bring-up (due to RIDE7 size limitations, it cannot be used for the full NuttX
	  bring-up).
	* Working, Tested Configurations:  the NuttX OS test and the NuttShell (NSH) example.

This basic STM32 port will be extended in the 0.4.13 NuttX release.  Functionality needed
for complete STM32 support includes:  USB device driver, LCD driver and NX bringup on the
development board's display and MicroSD support.  An SPI driver and a DMA support was included
in this 0.4.12 release, but is not yet tested.

This tarball contains a complete CVS snapshot from October 17, 2009

nuttx-0.4.13
^^^^^^^^^^^^

This is the 45th release of NuttX.  The release extends the support for the STMicro
STM32 microcontroller.  Minimal support for the STM3210E-EVAL development board based
around the STM32F103ZET6 MCU was released in NuttX-0.4.12.  This release adds:

	* A simple interface definition to support some FLASH, EEPROM, NVRAM, etc. devices.
	* Verified SPI operation using driver for SPI based FLASH parts M25P64 and M25P128.
	* Improved Cortex-M3 context switching.  This should improve context switching
	  performance be 2x in certain cases.
	* Added a USB device-side driver for the STM32.  This is an early release of a
	  very complex driver; some bugs are expected.  
	* The USB driver has been verified against the USB serial device class driver.
	  There is at least one known outstanding issue (see the full bug description in
	  the TODO list).

This release also corrects some important bugs in the early STM32 release:

	* Fixed several errors the prevented operation of NuttX on an STM32 development
	  board using USART2 as the serial console.
	* Fixed and optimization-dependent race condition in the clock initialization.
	* Fixed a critical bug in the interrupt control logic that could cause interrupt
	  operations to failed used for interrupts in a certain range.

This tarball contains a complete CVS snapshot from November 4, 2009

nuttx-4.14
^^^^^^^^^^

This is the 46th release of NuttX.  The release extends the support for the STMicro
STM32 microcontroller.  Minimal support for the STM3210E-EVAL development board based
around the STM32F103ZET6 MCU was released in NuttX-0.4.12 and extended in Nuttx-0.4.13
to include initial USB support.  This completes the STM32F103ZET6 and adds:

New Generic RTOS Features:

	* Added generic support that can be included in any block driver to provide
	  read-ahead buffering and write buffering for improved driver performance.
	* Added a generic worker thread that can used to defer processing from an
	  interrupt to a task.
	* Defined a generic SD/SDIO interface can can be bound to a MMC/SD or SDIO
	  driver to orovide SDIO support.
	* Implemented a an SDIO-based MMC/SD driver using this new SDIO interface

New STM32 Features:

	* Add support to configure an STM32 input GPIO to generate an EXTI interrupt.
	* Added support for buttons on the STM3210E-EVAL board.
	* Implemented an STM32 version of the common the SDIO interface.
	* Added a configuration to exercise the STM32 with the USB mass storage
	  device class example.

This release also corrects some important bugs in the early STM32 release:

	* Correct error handling in the mount() logic.
	* Fixed several STM32 DMA-related issues. Integrated and debugged STM32 DMA
	  functionality that was added in 0.4.12.
	* Fixed several bugs in the STM32 USB device-side driver.

NOTE:  This version, 4.14, is equivalent to what would have been called 0.4.14
to follow 0.4.13.  The zero has been eliminated from the front of the version
number to avoid confusion about the state of development:  Some have interpreted
the leading zero to mean that the code is in some way unstable.  That was not
the intent.  Beginning in January 2010, I will switch to the 2010.nn versioning
as many others have done to avoid such confusion.

This tarball contains a complete CVS snapshot from December 2, 2009

nuttx-5.0
^^^^^^^^^

This is 47th release of NuttX and the successor to nuttx-4.14.  This
major revision number has been incremented to indicate that an
incompatibility with previous nuttx releases has been introduced.  This
version adopts standard fixed width integer names as specified by the
ANSII C99 standard.  The core logic of NuttX is older than that
standard and did not conform to it.

If you have applications running on nuttx-4.14, those applications
should continue to build and execute without problem on nuttx-5.0.
However, if you have device drivers or other OS-internal logic, you
will probably have to make some minor changes to your code to use
this version.  Below is a summary of those changes:

o If you include sys/types.h to get the non-standard, fixed width
  integer types (uint32, uint16, ubyte, etc.), that is no longer
  necessary.
o Instead, you will need to include stdint.h where the new fixed width
  integer types are defined (uint32_t, uint16_t, uint8_t, etc.).
o You will have to change all occurrences of the following types:

  uint32 -> uint32_t
  uint16 -> uint16_t
  ubyte  -> uint8_t
  uint8  -> uint8_t
  sint32 -> int32_t
  sint16 -> int16_t
  sint8  -> int8_t

o In addition, the non-standard type 'boolean' must replaced with the
  standard type 'bool'.  The type definition for 'bool' is in stdbool.h

This change in typing caused small changes to many, many files.  It was
verified that all configurations in the release still build correctly
(other than the SDCC-based configurations).  Regression testing was
performed on a few configurations, but it is possible that minor build
issues still exist (if you encounter any, please let me know and I will
help you to fix them).

In the course of the regression testing, several important bugs unrelated
to the type changes were found and corrected.

o Fixed an important error in the RX FIFO handling logic of the LM3S6918
  Ethernet driver.
o Corrected the handling of TCP sequence numbers in the TCP stack.
o And other less important bugs as detailed in the ChangeLog.

The primary focus of this release was standards compatibility, but a
few new features were added including a (1) Flash Translation Layer (FTL)
that will support filesystems on a FLASH device and (2) partial ports
for the STM32F107VC and HCS12 C9S12NE64 MCUs.  Those ports are very
incomplete as of this writing.

This tarball contains a complete CVS snapshot from December 21, 2009

nuttx-5.1
^^^^^^^^^

This is the 48th release of NuttX.  This release adds support for two new
MCU architectures in various states of development:

o AT91SAM3U (http://www.atmel.com/products/at91/sam3landing.asp?family_id=605)

  This release adds support for the SAM3U-EK development board with the
  AT91SAM3U4E MCU (http://www.atmel.com/dyn/products/product_card_mcu.asp?part_id=4562).
  As with most NuttX architecutre releases, the release will be rolled out in
  two parts:  A basic port and an extended port.

  NuttX-5.1 includes the basic port for the SAM3U-EK board.  This release
  passes the NuttX OS test and is proven to have a valid OS implementation.
  It supports the basic boot-up, serial console and timer interrupts.  A
  configuration to support the NuttShell is also included.

  The extended port will also include support for SDIO-based SD cards and
  USB device (and possible LCD support).  These extensions may or may not
  happen by the Nuttx 5.2 release as my plate is kind of full now.

o LPC3131 (http://ics.nxp.com/products/lpc3000/lpc313x.lpc314x.lpc315x/)

  This release also adds the complete implementation of the basic port for
  the NXP LPC3131 MCU on the Embedded Artists EA3131 board
  (http://www.embeddedartists.com/products/kits/lpc3131_kit.php).  That port,
  unfortunately has stalled due to tools issues.  Those tool issues have
  been resolved and I am confident that the verified basic port will be
  available in NuttX-5.2.

  The extended release will follow and should include SDIO-based SD card
  support and device USB.

A few additional features and bugfixes of a minor nature were also incorporated
as detailed in the ChangeLog.

nuttx-5.2
^^^^^^^^^

This is the 49th release of NuttX.  This release completes the verification of
the basic port for the NXP LPC3131 MCU on the Embedded Artists EA3131 board
(http://www.embeddedartists.com/products/kits/lpc3131_kit.php).  This basic
port includes basic boot-up, serial console, and timer interrupts.  This port
has been verified on the using the NuttX OS test and includes a working
implementation of the NuttShell (NSH).

An extended release will follow and should include SDIO-based SD card
support and device USB.