Prep for NuttX-6.27 releasenuttx-6.27

1 files changed, 235 insertions, 0 deletions

diff --git a/nuttx/ReleaseNotes b/nuttx/ReleaseNotes
index b8382f0ac..de1f71b3e 100644
--- a/nuttx/ReleaseNotes
+++ b/nuttx/ReleaseNotes
@@ -4000,3 +4000,238 @@ Bugfixes (see the ChangeLog for details).  Some of these are very important:
         was being confused with a NUL.  So if a NUL was received, the
         NSH session would terminate because it thought it was the end of
         file.
+
+NuttX-6.27
+^^^^^^^^^^
+
+The 94th release of NuttX, Version 6.27, was made on April 28, 2013,
+and is available for download from the SourceForge website.  Note
+that release consists of two tarballs:  nuttx-6.27.tar.gz and
+apps-6.27.tar.gz.  Both may be needed (see the top-level nuttx/README.txt
+file for build information).
+
+Additional new features and extended functionality:
+
+    * OS Initialization:
+
+      - Add missing registration of /dev/zero.  Registration of /dev/null
+        should depend upon conditional compilation.  From Ken Pettit.
+
+    * Tasking:
+
+      - Added a new interface to set aside memory on the task's stack.  This
+        is used (at least in the kernel build) to hold task arguments.
+      - Remove up_assert_code().  One assertion routine is enough.
+
+    * Kernel Build:
+
+      - Extensive changes were made to support the kernel build mode.  In
+        this mode, NuttX is built as a monolithic kernel.  NuttX is built
+        as a separate kernel mode "blob" and the applications are built
+        as a separate user mode "blob".  The kernel runs in kernel mode and
+        the applications run in user mode (with the MPU restricting user
+        mode accesses).  Access to the kernel from the user blob is only
+        via system calls (SVCalls).
+      - Kernel build configurations for the Open1788 board and for the
+        STM32F4Discovery now execute correctly.
+      - Changes were made to task and thread start-up routines, signal
+        handling, data structures, ARMv7-M SVCalls, stack management
+        interfaces,
+
+    * Drivers:
+
+      - Driver for the ST7567 LCD Display Module from Univision Technology
+        Inc.  Contributed by Manikandan.S
+      - SPI initialize functions renamed so that multiple SPI blocks can
+        be initialized.
+      - Extended to support the RAMTRON FM25V01 device. Contributed by
+        Lorenz Meier
+      - Serial drivers: TIOCSERGSTRUCT ioctls now conditioned on
+        CONFIG_SERIAL_TIOCSERGSTRUCT
+
+    * ARMv7-M (Cortex-M3/4):
+
+      - Added support for modifiable interrupt vectors in RAM
+
+    * nuvoTon NUC1xx:
+ 
+      - Added kernel build support
+
+    * Freescale Kinetis:
+ 
+      - Add kernel build support
+      - Add support for the Kinetis L family of Cortex-M0+ MCUs.  Contributed
+        by Alan Carvalho de Assis.
+
+    * LPC17xx:
+
+      - Now holds off sleep mode in the IDLE loop is DMA is in progress
+        (because sleep mode will disable CPU SRAM).
+
+    * LPC17xx Boards:
+
+      - ZKIT-ARM-1769:  Now supports the ST7567 LCD display module.  Added
+        an nxhello configuration for testing (Manikandan.S).
+      - ZKIT-ARM-1769:  Add support for both CAN1 and CAN2.  Contributed by
+        M.Kannan
+
+      - Open1788: Basic support for the WaveShare Open1788 board is complete
+        with working OS test, NSH, and graphics configurations.
+      - Open1788: Integrated the LPC178x LCD driver with the WaveShare display.
+        Touchscreen support is included, howerver, there appears to be an
+        issue with the Open1788 touchscreen interrupt signal.
+      - Open1788:  Now supports SDRAM (used to provide the LCD framebuffer).
+      - Open 1788: Reversed sense of the IDLE LCD. It is now off when the
+        LPC17 is sleeping and on when awake.  That is much a better visual
+        indication of the dynamic CPU load
+
+    * LPC17xx Drivers:
+
+      - Added an LCD framebuffer driver for the LPC177x/8x family.
+      - Implemented LPC17xx GPDMA support.
+      - Integrated the LPC17xx GPDMA support into the SD card driver.
+      - SSP driver adapted to work with the LPC178x family.
+      - Separate LPC176x and LPC178x GPIO logic; this logic is too different
+        to maintain in one file with conditional compilation.
+      - Re-design of the GPIO logic for the LPC178x family by Rommel Marcelo.
+
+    * LPC43xx:
+ 
+      - Added kernel build support
+
+    * STM32
+
+      - Added support for kernel mode build.
+      - Added architecure support for the STM32 F427/F437 chips. Contributed
+        by Mike Smith
+
+    * STM32 Boards
+
+      - Added a configuration to support a kernel mode build of the OS test
+        on the STM32F4Discovery
+
+    * Stellaris LM3S/LM4F
+
+      - Added kernel build support
+      - Added support for the 7 UARTs on the LM4F120
+
+    * Stellaris LM4F Boards
+
+      - Added scripts and instructions to simplify use of OpenOCD with ICDI
+        (JP Carballo)
+      - The basic for the Stellaris LM4F120 Launchpad is complete.  This
+        includes support for OS test and NSH configurations.  Additional
+        driver development is needed.
+ 
+    * Build System:
+
+      - Directories where the same sources files are used to build different
+        objects in the first and second pass kernel builds need to keep those
+        objects in separate directories so that they are not constantly
+        rebuilt.
+
+    * Applications:
+
+      - apps/system/ramtest:  Add a simple memory test that can be built
+        as an NSH command.
+
+    * Tools:
+
+      - kconfig2html is a new tool which will replace the hand-generated
+        documentation of the NuttX configruation variables with auto-
+        generated documentation.
+
+Efforts In Progress.  The following are features that are partially
+implemented but present in this release.  Most are expected to be fully
+available in NuttX 6.28.
+
+    * A port to the Freescale Freedom KL25Z is complete but not yet stable
+      enough.  The KL25Z is a low-cost Cortex-M0+ part with 128KB of FLASH
+      and 16KB of SRAM.  This is is the effort of Alan Carvalho de Assis.
+
+    * Conversion of old configurations to use the kconfig-frontends
+      tool is an ongoing effort that will continue for some time.
+      At this time, only 32% of the configurations have been converted
+      to use the kconfig-frontends tools.
+
+Bugfixes (see the ChangeLog for details).  Some of these are very important:
+
+    * Tasking:
+
+     - Fixed a critical bug:  When there is pending C buffered output
+       and the system is very busy, the a pthread may be blocked at
+       a critical point when trying to exit.  Blocking at this critical
+       point would cause crashes.  All entire task/thread exit logic
+       paths were reviewed and failsafe mechanisms were put in place
+       to assure that exitting tasks never block after task teardown
+       has been started.
+
+    * ARMv6-M:
+
+      - Fixed parameter passing for all system call inline functions with > 3
+        parameters
+      - Fixed a major problem:  The Cortex-M0 has no BASEPRI register but the
+        logic of NuttX-6.26 was using it to manage interrupts.  Switch to
+        using the PRIMASK instead.  This means that hardfaults will (again)
+        occur when SVC instructions are executed
+
+    * ARMv7-M:
+
+      - Corrected Correct MPU sub-region settings for unaligned regions.
+      - In exception handling with CONFIG_NUTTX_KERNEL, need to explicitly
+        set and clear the privilege bit in the CONTROL
+      - Fixed parameter passing for all system call inline functions with > 3
+        parameters
+
+    * Drivers:
+
+      - Support for O_NONBLOCK was not supported in the "upper half"
+        serial driver.
+      - PL2303 compilation errors
+
+    * Stellaris LM3S/4F
+
+      - Corrected typos in alternate function definitions.
+
+    * LPC17xx Drivers:
+
+      - Added a work-around for an ADC errata.  From Chris Taglia
+      - Only one ADC pin was configured. Need to configure all that
+        are in the ADC0 set.  From MKannan
+
+    * File Systems:
+
+      - The FAT logic was not making a distinction between directory
+        non-existence and file non-existence so when it you try to
+        create a file in a non-existent directory, it would create a
+        file with the name of the missing directory.  Reported by Andrew
+        Tridgell
+      - Several fixes to the FAT file system from Ronen Vainish.  These
+        fixes mostly involve the logic to extend directory clusters for
+        the case of long file names but also include a few important
+        general fixes (such as for storing 32 bit FAT values)
+      - mkfatfs was writing the boot code to the wrong location.  From
+        Petteri Aimonen
+
+    * Networking:
+
+      - Fixed a compilation error when socket options are are disabled.
+        Reported by Daniel O'Connor
+
+    * C Library:
+
+      - Corrected an error in sscanf.  If %n occurs in the format statement
+        after the input data stream has been fully parsed, the %n format
+        specifier will not be handled.  Reported by Lorenz Meier
+      - strchr(str, '\0') should return a pointer to the end of the string,
+        not NULL.  From Petteri Aimonen
+
+    * Build System:
+
+      - Fix naming of NuttX target if EXEEXT is defined.
+
+    * Applications:
+
+      - OS test: Fix timing error in non-cancelable thread test.
+      - NSH: Correct the test of the skip input parameter.  Was limiting the
+        range to <= count.  From Ken Petit.