ChangeLog

	* nuttx/lcd/hd4478ou.h and configs/pcblogic-pic32mx/src/up_lcd1602:
	  Start of support of LCD1602 alphanumeric LCD.  I need a few
	  more parts before I can finish integrating this one.
	* arch/arm/src/*/chip.h and arch/arm/include/*/chip.h:  Move all
	  priority ranges from the src to the include chip.h header file.
	* arch/arm/include/armv7-m/irq.h:  Add inline functions to enable
	  and disable interrupts via the BASEPRI register.
	* arch/arm/Kconfig:  Add new option CONFIG_ARM7VM_USEBASEI
	* arch/arm/src/*/*_irq.c:  Set the priority of the SVCALL exception
	  to the highest possible value.
	* arch/armv7-m/up_hardfault.c:  Fail if a hardfault occurs
	  while CONFIG_ARM7VM_USEBASEPRI=y.
	* arch/arm/src/stm32/stm32_serial.c:  Add support for USART
	  single wire mode (Contributed by the PX4 team).
	* sched/: Implement support for retaining child task status after
	  the child task exists.  This is behavior required by POSIX.
	  But in NuttX is only enabled with CONFIG_SCHED_HAVE_PARENT and
	  CONFIG_SCHED_CHILD_STATUS
	* Add support for keyboard encode to the keypad test (from
	  Denis Carikli).
	* configs/olimex-lpc1766stk/nettest:  Configuration converted to
	  use the kconfig-frontends tools.
	* net/net_poll.c:  Split net_poll() to create psock_poll() too.
	* net/net_poll.c:  Fix poll/select issure reported by Qiang:
	  poll_interrupt() must call net_lostconnection() when a
	  loss of connection is reported.  Otherwise, the system will
	  not know that the connection has been lost.
	* sched/group_create.c, group_join.c, and group_leave.c:  Add
	  support for task groups.
	* sched/group_signal.c and task_exithook.c:  Send signal to all
	  members for the parent task group.
	* include/nuttx/sched.h and sched/env_*.c:  Move environment
	  variables into task group structure.
	* sched/: Lots of file changed.  Don't keep the parent task's
	  task ID in the child task's TCB.  Instead, keep the parent
	  task group IN the child task's task group.
	* fs/, sched/, include/nuttx/sched.h, and include/nutts/fs/fs.h:
	  Move file data from the TCB to the task group structure.
	* libc/stdio/, sched/, include/nuttx/lib.h, and include/nutts/fs/fs.h:
	  Move stream data from the TCB to the task group structure.
	* net/, sched/, and include/nuttx/net/net.h:  Move socket data
	  from the TCB to the task group structure.
	* sched/task_starthook.c, sched/task_start.c, and include/nuttx/sched.h:
	  Add a task start hook that will be called before the task main
	  is started. This can be used to schedule C++ constructors to run
	  automatically in the context of the new task.
	* binfmt/binfmt_execmodule: Execute constructors as a start hook.
	* sched/os_start.c: Fix ordering of group initialization.
	* configs/stm32f4discovery/usbnsh:  Add an NSH STM32F4Discovery
	  configuration that uses USB CDC/ACM for the NSH console.
	* configs/stm32f4discovery/nsh: Converted to use the kconfig-frontends
	  tools.
	* configs/*/src/up_userleds.c: Fix a error that was cloned into
	  all STM32 user LED code.  The wrong definitions were being used
	  to set LEDs on or off.
	* arch/*/common/up_internal.h and arch/*/common/up_initialize.c:
	  Serial was driver was not being built if there is no console
	  device.  Obviously, the serial driver may be needed even in
	  this case.
	* arch/arm/src/stm32/stm32_serial.c: If there is a serial console,
	  it would be ttyS0 and the others would be ttyS1-5.  If there
	  is not serial console, was labeling them ttyS1-6; now labels them
	  ttyS0-5.
	* fs/fs_syslog.c: Can't handle SYSLOG output to character device from
	  the IDLE task (because it can't block). syslog_putc now returns EOF
	  on failure and sets errno.  Fixed some errors in error handling.
	* libc/stdio/lib_syslogstream.c:  Checking of return value from
	  syslog_putc was bogus.  Switching to EOF for all errors solves
	  this.
	* arch/arm/src/lm/chip/lm4f_memorymap.h: More LM4F changes from
	  Jose Pablo Carballo.
	* drivers/serial/serial.c, include/nuttx/serial/serial.h,
	  drivers/usbdev/cdcacm.c, and drivers/pl2303.c: Add support for
	  removable serial devices (like USB serial).  This support is enabled
	  by CONFIG_SERIAL_REMOVABLE.
	* arch/*/src/*/Toolchain.defs: Change assignment so that we can
	  override CROSSDEV with a make command line argument.
	* include/assert.h:  Mark assertion functions as non-returning.
	* arch/*/src/*/up_assert.h:  Mark _up_assert() as non-returning.
	* drivers/mtd/at25.c: When the AT25 device was not available the
	  initialization did not fail like it should. From Petteri Aimonen.
	* fs/fat/fs_configfat.c:  Fix some errors in FAT formatting logic
	  for large devices and for FAT32. From Petteri Aimonen.
	* fs/fat/fs_fat32util.c:  Fix an initialization error found by
	  Petteri Aimonen.  freecount and next freecount initialization were
	  reversed.
	* drivers/mmcsd/mmcsd_spi.c: Some SD cards will appear busy until
	  switched to SPI mode for first time.  Having a pull-up resistor on
	  MISO may avoid this problem, but this patch makes it work also
	  without pull-up.  From Petteri Aimonen.
	* fs/fat/fs_fat32.c: Fix a compilation error when FAT_DMAMEMORY=y. 
	  From Petteri Aimonen.
	* arch/arm/src/stm32/chip/stm32_spi.h: STM32F4 max SPI clock freq is
	  37.5 MHz.  Patch from Petteri Aimonen.
	* arch/arm/src/stm32/stm32_spi.c: Fixes for SPI DMA work on the
	  STM32F4. Includes untested additions for the F1 implementation as
	  well.  From Petteri Aimonen.

6.26 2013-xx-xx Gregory Nutt <gnutt@nuttx.org>

	* drivers/serial/serial.c:  Correct some race conditions when checking
	  for disconnection of a removable serial device.
	* sched/task_posixspawn.c, task_spawn.c, task_spawnparms.c and
	  spawn_internal.h:  Create new interface task_spawn() that is
	  like posix_spawn(), but uses entry point addresses like
	  task_create().
	* Corrected all argv[] arguments. Should be char * const *, not
	  const char **.
	* sched/pthread* and include/nuttx/sched: Move pthread join data
	  and pthread key calculation data into the "task group" structure.
	* sched/atexit.c, on_exit.c, task_exithook.c and include/nuttx/sched.h:
	  Move atexit and on_exit data structures to task group.  These
	  callbacks are only issued now when the final member of the task
	  group exits.
	* sched/waitpid.c, task_exithook.c and include/nuttx/sched.h:
	  Move waitpid data data structures to task group.  Callers of
	  of waitpid() are now only awakened whent he final thread of the
	  task group exits.
	* sched/mq_descreate.c, mq_open.c, mq_remove.c, group_leave.c, and
	  include/nuttx/sched.h:  Move list of opened message queues to
	  the task group structures.  Now all message queues opened by
	  members of the group are closed when the last member of the group
	  exits.
	* includes/nuttx/sched.h and Lots of files:  Change name of _TCB to
	  struct tcb_s so that (1) it is consitent with other NuttX naming and
	  so that (2) the naming can handle some upcoming changes.
	* includes/nuttx/sched.h and sched/:  There are three TCB structures:
	  struct tcb_s is a generic common version, struct task_tcb_s is a
	  version for tasks and kernel threads and pthread_tcb_s is a version
	  for pthreads.  By dividing the TCB structure into these variants,
	  pthreads do not have to be burdened by task-specific data structures
	  (and vice versa).
	* sched/task_exithook.c adn group_create.c:  Fix an error, the
	  task within the task group may exit early leaving a pthread to
	  exit the task group last.  In this case, we need to remember the
	  the PID of the main task in the task group and use that PID for
	  signalling SIGCHILD to the parent task group.
	* included/nuttx/sched.h and sched/sig*.c:  Numerous changes to the
	  signal deliver logic so that the delivery of signals to threads
	  within a task group will be compliant with delivery of signals
	  to threads within a POSIX process.
	* sched/mq_recover.c and task_exithook.c:  Add logic to handle the
	  case where a task is deleted (or pthread canceled) while it is
	  waiting on a message queue.  task_delete() and pthread_cancel()
	  are dangerous interfaces.  This is only one feeble recover measure
	  of *many* that would be needed to do this safely.
	* sched/group_killchildren.c, task_recover.c, group_foreachchild.c,
	  sched/restart.c, sched/task_delete.c, and others:  Beef up logic
	  to better support task deletion and pthread cancellation.  Needed
	  to pass need OS test case for task_restart().
	* sched/include/sched.h and all timed functions in sched/:  Move
	  timer from local variables to TCB.  This is needed so that if a
	  task is canceled or restarted while it is waiting for a timed
	  event, we can gracefully recover.  We can't let the timer expire
	  after the task has been deleted.
	* arch/arm/include/stm32 and arch/arm/src/stm32:  Add support for
	  the STM32 F3 family (still missing some things).
	* configs/stm32f3discovery:  This will (eventually) be support for
	  the STM32F3Discovery board.
	* STM32 F3 and STM32F3Discovery port is complete a ready for test.
	* arch/arm/src/lpc17xx: Add support for the Cortex-M4 FPU and
	  Mikes "common vector" logic.  The LPC1788 is going to need
	  these things.
	* arch/arm/src/stm32/stm32_spi.c:  Fix SPI DMA logic that does
	  not work if sem_wait() is interrupt by a signal.  From Petteri
	  Aimonen.
	* drivers/input/max11802.c: MAX11802: Fix a timing bug that
	  corrupted coordinates.  From Petteri Aimonen.
	* drivers/mmcsd/mmcsd_spi.c:  Use SPI locking so that MMC/SD can
	  exist on the same bus as other SPI devices.  From Petteri
	  Aimonen.
	* graphics/nxfonts/nxfonts_sans17x22.h: Small mod to hyphen in
	  sans17x22 font.  The hyphen did not have any space on its sides.
	  This caused it to run together with other characters so that for
	  example "+-" would look weird. From Petteri Aimonen.
	* mm/mm_mallinfo.c:  Take MM semaphore in mm_mallinfo. From Petteri
	  Aimonen.
	* configs/stm32f3discovery/nsh/defconfig:  Disable SPI.  It is nto
	  used.
	* drivers/mtd/sst39vf:  Add a driver for the SST29VF NOR FLASH parts.
	* sched/os_start.c:  Add an additional call-out to support board-
	  specific driver initialization during the start phase:  If
	  CONFIG_BOARD_INITIALIZE is defined, then an additioinal
	  initialization function called board_initialize() will be called
	  just after up_initialize() is called and just before the initial
	  application is started.
	* arch/arm/src/stm32/stm32_otgfsdev.c, drivers/usbdev/usbdev_trprintf.c,
	  and include/nuttx/usb/usbdev_trace.h:  Add logic to support decoding
	  of device-specific trace events to make the trace ouput more readable.
	  From Petteri Aimonen.
	* arch/arm/src/stm32/stm32_otgfsdev.c:  Need to manually set CNAK in
	  the case where we are waiting for a SETUP command with DATA.  Otherwise,
	  the core may NAK further transactions.  From Petteri Aimonen.
	* arch/arm/src/stm32/stm32_otgfsdev.c: Add logic to prevent premature
	  to IDLE state.  This change (plus the previous) was necessary to get
	  the CDC/ACM driver working the certain STM32 F4 hardware (but not others).
	  These changes appear to prevent certain race conditions that may or may
	  not cause USB problems.  From Petteri Aimonen.
	* arch/arm/include/armv6-m and arch/arm/src/armv6-m: First cut at support
	  for the Cortex-M0
	* configs/nutiny-nuc120, arch/arm/include/nu1xx, and arch/arm/src/nuc1xx:
	  Support for Nuvoton NuTiny NUC120.
	* 2013-02-22:  the Cortex-M0, NuvoTron NUC1xx, and NuTiny-SDK-NUC120 port
	  is code complete and ready for testing.
	* configs/ekk-lm3s9b96/ostest and nsh:  All EKK-LM3S9B96 configurations
	  converted to use the mconf configuration tool.
	* configs/zkit-arm-1769:  Add support for Zilogic System's ARM development
	  Kit, ZKIT-ARM-1769.  From Rashid.
	* configs/zkit-arm-1769/hello:  Add a "Hello, World!" configuration for
	  the KBIT-ARM-1769 board.  From Rashid.
	* configs/zkit-arm-1769/thttpd:  Add a THTTPD configuration for the
	  KBIT-ARM-1769 board.  From Rashid.
	* 2013-02-27: All configurations for the Cortex-M0 NuTINY-SDK-NUC120
	  appear to be functional and stable.
	* configs/zkit-arm-1769/nsh:  Add an NSH configuration for the
	  KBIT-ARM-1769 board.  From Rashid.
	* arch/arm/src/stm32/stm32_otgfsdev.c:  Fixes from Petterri Aimonen
	  related to corner cases that can cause infinite interrupts.
	* drivers/usbdev/usbmsc_scsi.c:  Change to allow the full name in the
	  USB descriptor but a truncated, 8-byte name in the SCSI field.
	  From Petteri Aimonen.
	* arch/arm/src/stm32/stm32_spi.c: Need to clear error flags to prevent
	  corruption of subsequent transfers.  Also, bit count should not be
	  changed while the SPI peripheral is enabled.  From Petteri Aimonen.
	* drivers/mmcsd/mmcsd_spi.c:  When bus is shared, the speed has to be
	  set every time.  Also SD cards require a few dummy clocks to react
	  into CS release.  From Petteri Aimonen.
	* configs/lm4f120-launchpad: In initial configuration for testing
	  the LM4F120 LaunchPad port.  This is to support testing only and
	  is not yet a functional board port (as of 2013-03-01).
	* arch/arm/include/lm/lm4f_irq.h and arch/arm/src/lm/chip/lm4f_vector.h:
	  Add interrupt vector/IRQ number definitions for the LM4F120.
	* arch/arm/src/stm32f20xxx_dma.c and stm32f40xxx_dma.c:  Fix a typo
	  in assigned base register addresses for each DMA channel.  From
	  Yan T.
	* Several build fixes from Mike Smithe were incorporated.  These were
	  mostly compilation errors introduced into the system because of the
	  large number of recent changes with broad scope (2013-03-04).
	* configs/zkit-arm-17969/src/up_can.c:  Add CAN support to the
	  Zilogics Technologies ZKIT-ARM-1769 board (From Rashid Fatah, (2013-03-04)).
	* arch/arm/src/lpc17/lpc17*_clockconfig.c:  The WaveShare Open1788
	  board now boots and passes the OS test.  This is the work of
	  Rommel Marcelo (2013-03-04).
	* arch/arm/src/lm/lm_gpio.c, lm_gpio.h, and chip/lm4f_pinconfig.h
	  Extend GPIO logic to handle LM4F.  Add LM4F pin configuration header
	  file (2013-03-04).
	* configs/open1788:  Enable LED support in all configurations.
	  (2013-03-04)
	* configs/open1788/nsh:  NSH configuration verified function.  By Rommel
	  Marcelo (2013-03-05).
	* configs/open1788/src/lpc17_nsh.c:  Use the SD card interface, not SPI
	  to interface with SD cards (2013-03-05.
	* arch/arm/src/lpc17xx/lpc17_sdcard.c and header files:  Clone the STM32
	  SD card interface to the LPC1788.  It appears to be the same IP.
	  (2013-03-05)
	* libc/wqueue:  Work queue logic moved from sched/ to libc/wqueue.  It
	  is not really core OS functionality and this move helps prepare for
	  user-space work queues. (2013-03-05)
	* libc/wqueue:  Implemented user-space work queues.  These will not
	  get tested until the next time I attempt a NuttX kernel build.
	  (2013-03-05).
	* arch/arm: Correct some bad syscall dispatching logic.  This change
	  cannot be fully tested until there is a fielded NuttX kernel build.
	  (2013-03-06).
	* net/net_poll.c:  Correct logic that checks if the socket is
	  disconnected when the poll is setup.  That is bad logic:  Listen
	  sockets, for example, are not connected.  In that case, the purpose of
	  the poll is to wait for connection events.  As a result of this,
	  poll/select would return immediately with POLLHUP with it was used to
	  detect connection events.  This fix for now was to check instead if
	  the socket is closed (meaning that it was connected at one time but
	  was closed by the remote peer).  That excludes the listen socket which
	  was never connected.  This does introduce a new problem, however.  If
	  the socket was not closed, but lost the connection through an abnormal
	  event, then poll/select will hang.  That needs to be revisited.
	  (2013-03-07)
	* fs/fs_select.c:  Was not checking if the timeout parameter was NULL
	  but would, instead, setup a bogus timeout based on whatever it found at
	  address zero.  Also, improved some of the memory allocation logic so
	  that it will not use so much memory. (2013-03-07)
	* net/net_poll.c:  Handle the missing case.  Now tests for not connected
	  AND not listening.  I think that now covers all of the cases including
	  the missing case noted above. (2013-03-07)
	* mm/:  Move all memory manager globals into a structure.  A reference
	  to this structure is now passed internally between mm APIs. This
	  change will (eventually) support multiple heaps and heap allocators.
	  (2013-03-08).
	* mm/ and include/nuttx/mm.h:  Implement support for multiple heaps.
	  (2013-03-08).
	* arch/*/src: xyz_addregion() needs to call kmm_addregion, not mm_addregion.
	  (2013-03-08).
	* sched/kmm*.c:  Move this garbage kmm*.c file to mm/. until I decide what
	  to do with them (which is probably to just delete them). (2013-03-08).
	* mm/mm_test.c and Makefile.test:  Deleted the memory test.  This was
	  a good test and helped me a lot when I wrote the memory manager, but
	  now it is in the way and paralyzing other efforts.  So the memory unit
	  test was deleted. (2013-03-08)
	* sched/sched_free.c:  Rename sched_free() to sched_ufree(); Add
	  sched_kfree() to handler deferred kernel heap allocations. (2013-03-10)
	* arch/:  User user-accessible heap to allocate all stacks. (2013-03-10)
	* arch/arm/src/sam3u:  The AT91SAM3U will now support a kernel heap if
	  so configured. (2013-03-10)
	* configs/sam3u-ek/knsh:  This configuration was converted to use the
	  kconfigs-frontends build tool. (2013-03-10)
	* configs/*/include/user_map.h and include/nuttx/userspace.h:  Remove
	  the very kludgy user_map.h file and replace it with a header that
	  is expected at the beginning of the user-space blob. (2013-03-10)
	* configs/sam3u-ek/kernel/up_userspace.c:  This is the header for
	  the SAM3U-EK's user space.  (2013-03-10)
	* sched/os_bringup.c:  In the kernel build, os_bringup() now uses the
	  user-space header to automatically start the user-space work queue,
	  if so configured. (2013-03-10)
	* arch/arm/src/lpc17xx/lpc17_mpuinit.c and lpc17_userpace.c:  Add
	  support for the MPU and kernel build for the LPC17xx family.
	  (2013-03-11)
	* configs/open1788/kernel and knsh:  Add kernel build support and
	  a kernel NSH configuration for the WaveShare Open1788 board.
	  (2013-03-11)
	* configs/sam3u_ek/kernel, knsh, and scripts:  Move some files around
	  for better supportability. (2013-03-11)
	* configs/open1788/kernel, knsh, and scripts:  Add a kernel mode build
	  configuration for the WaveShare Open1788 board. (2013-03-11)
	* arch/arm/src/armv7-m/up_mpu.c:  Several fixes to MPU logic.
	  (2013-03-12).
	* arch/arm, configs/sam3u-ek, configs/open1788:  Fix memory map for
	  kernel mode build; Some regions were overlapping. (2013-03-13).
	* arch/:  Rename g_heapbase to g_idle_topstack.  This is the same value
	  however:  The top of the IDLE stack is the same as the base of the
	  heap in the flat build.  But not in the kernel build:  The base of
	  the heap is elsewhere so the naming was wrong. (2013-03-13).
	* libc/stdlib/lib_itoa.c:  Implementation of itoa() contributed by
	  Ryan Sundberg. (2013-03-14).