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Release note draft. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@11270 35acf78f-673a-0410-8e92-d51de3d6d3f4
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******************************************************************************
ChibiOS next is composed of several independent but inter-operable
sub-projects: RT, NIL, HAL, EX.
sub-projects: RT, NIL, HAL, EX. Plus several external libraries
integrated in our structure: WolfSSL, FatFS and lwIP.
*** ChibiOS next highlights ****
This release is focused on RTOS general improvements, both RT and NIL received
a series of important improvements, new features have been added.
This release is focused on features and general improvements, HAL, RT and NIL
received a series of important improvements, new features have been added.
*** ChibiOS next general improvements ***
- Shared licensing headers under /os/licenses, now all products are handled
by the same license include files.
- New ChibiOS/EX subsystems. EX sits on top of HAL and provides portable
drivers for devices residing the MCU like MEMS, sensors, memories,
displays etc.
- Shared RTOS components, now allocators, mailboxes and binary semaphores
are usable by both RT and NIL.
- Memory Pools now have a new variant named "Guarded Memory Pool" including
a semaphore that guards the allocation function, the caller waits if there
is not an object available in the pool.
- FatFS 0.10b has been integrated.
- Rationalized source tree to reduce code duplication.
- New unit test library.
- Test suites have been rewritten using an unique code generation system
starting from XML descriptions.
- Startup files have been separated from ports and licensed under Apache 2.0
license, now it is possible to use ChibiOS startups and ld files in projects
without RT, NIL, HAL or EX.
- Improved GCC ld scatter files with multi RAM/Flash regions capability.
- GCC makefiles system improvements.
- Support for all new Nucleo and Discovery boards from ST.
- CMSIS updated to version 4.50.
- Enhanced shell with history and quoted parameters. Common commands have
beed included in a shared module in order to avoid duplication in the
various demos.
- WolfSSL 1.12.2 has been integrated. HTTPS demo added.
- FatFS 0.13 has been integrated.
- lwIP 2.0.3 has been integrated.
- CMSIS 5.1.1 has been integrated.
- Improved build system based on make.
- Improved integration with Eclipse, launch configurations have been
centralized for many projects.
- Several HAL and test applications have become "multi projects", a single
project is able to build for multiple targets/boards.
- Improved test engine.
- Added a test suite generator written in FTL, now it is possible to generate
test code without the need of SPC5Studio.
- Added a board files generator written in FTL, now it is possible to generate
board files without the need of ChibiStudio.
*** What's new in RT/NIL ports ***
- Common ports architecture. Now RTOS ports work for both RT and NIL, no
more code duplication. Ports are now also licensed for both NIL and RT.
- MPU use for hardware stack checking in ARMCMx port.
- GHS compiler support added to the Power e200z port.
- Experimental ARM Cortex-A Trust Zone support.
*** What's new in RT 4.0.0 ***
*** What's new in OS Library ***
- Now uses the common ports architecture.
- Now uses the new shared RTOS components.
- New threading API, now creating static threads is even faster.
- Extended priority range from 1..127 to 1..255.
- Enhanced dynamic threading, safer and easier to use.
- Enhanced Registry, it is now possible to find threads by name, by pointer
or by working area.
- Enhanced trace buffer, it is able to store events regarding not just threads
but also IRQs, halts and user events. The trace record now stores both the
"slow" system time and a RT stamp for increased accuracy.
- New kernel hooks for a more flexible code instrumentation.
- Removed I/O queues, now the HAL has an improved equivalent.
- Experimental NASA OSAL implementation.
- Posix simulator added.
- OS library now has its own test suite.
- Mailbox API changed by adding "Timeout" to those function that have
timeout capability, for consistency with the rest of the system.
- Added an "Objects Factory" to the OS Library, it allows to dynamically
allocate reference-counted kernel objects/buffers or to register
static objects. Allocated/registered objects can be retrieved by name.
- Added an "Objects FIFO" object to the OS Library, it allows to
exchange complex objects between threads/ISRs. It is based on a
mailbox and a guarded memory pool.
- Added alignment handling to memory pools.
*** What's new in NIL 2.0.0 ***
*** What's new in RT 5.0.0 ***
- Now uses the common ports architecture.
- Now uses the new shared RTOS components.
- Added implementation of thread queues directly in the kernel, removed it
from NIL OSAL.
- All new features are optional so there is no code size increase.
- Enhanced source-level compatibility with RT.
- Enhanced debug features.
- State checker like in RT.
- Parameters checks like in RT.
- The type systime_t has been split in systime_t and sysinterval_t, the
two can have different size. The system is now more rigorous in time
handling, an absolute time is something different from an interval,
sysinterval_t can be larger than the systime_t, this means that it is
now possible to use very long intervals when the system time uses a small
counter.
- Time conversion macros have been renamed in TIME_S2I(), TIME_MS2I(),
TIME_US2(), TIME_I2S(), TIME_I2MS() and TIME_I2US. Conversion is now done
by casting all operands to a large time_conv_t type improving safety by
eliminating integer truncations.
- Time conversion functions have been renamed in: chTimeS2I(), chTimeMS2I(),
chTimeUS2I(), chTimeI2S(), chTimeI2MS() and chTimeI2US().
- New functions have been added for dealing with operations with time and
intervals: chTimeAddX() and chTimeDiffX().
- All functions that have a timeout parameter now take a sysinterval_t type
instead of systime_t.
- Improved test suite.
- Enhanced Events API, added chEvtGetAndClearEventsI() and chEvtAddEventsI().
- The chconf.h configuration files now are tagged with the version
number for safety. The system rejects obsolete files during
compilation. Stronger checks are performed on chconf.h, now missing
settings trigger an error instead of getting a default.
*** What's new in HAL 5.0.0 ***
*** What's new in NIL 3.0.0 ***
- The type systime_t has been split in systime_t and sysinterval_t, the
two can have different size. The system is now more rigorous in time
handling, an absolute time is something different from an interval.
- Time conversion macros have been renamed in TIME_S2I(), TIME_MS2I(),
TIME_US2(), TIME_I2S(), TIME_I2MS() and TIME_I2US. Conversion is now done
by casting all operands to a large time_conv_t type improving safety by
eliminating integer truncations.
- New functions have been added for dealing with operations with time and
intervals: chTimeAddX() and chTimeDiffX().
- All functions that have a timeout parameter now take a sysinterval_t type
instead of systime_t.
- Improved test suite.
- The chconf.h configuration files now are tagged with the version
number for safety. The system rejects obsolete files during
compilation.
*** What's new in HAL 6.0.0 ***
- Added a Managed Flash Storage module to the HAL. This modules handles
garbage collection, storage self-repair and wear leveling.
- Improved serial driver.
- It is possible to set a different buffer size for each port.
- SW overruns and HW overruns now have a separate event flag.
- Events handling in the PAL driver. Now it is able to support interrupts
handling and callbacks.
- EXT driver is still supported but marked as deprecated.
- New interface for flash devices (used by EX).
- New interfaces for accelerometer, barometer, compass, gyroscope,
hygrometer and thermometer devices (used by EX).
- Added an I2C bit banged driver as fall-back for faulty hardwares.
- Improved OSAL architecture with shared sub-modules.
- All file names have been prefixed by "hal_" in order to prevent collisions
with 3rd parties files. This should make integration of external libraries
much easier.
- Improved behavior of HAL queues, now the timeout is absolute not just an
inter-byte timeout.
- Added a "control" function to the channels interface, it allows to add
custom features to the various implementations.
- Added I-class functions to the serial driver: sdGetI(), sdReadI(),
sdPutI() and sdWriteI().
- Improved PAL driver.
- Added an user parameter to the PAL callbacks for consistency with other
drivers.
- Added blocking functions for edge synchronization: palWaitLineTimeout()
and palWaitLineTimeoutS().
- Improved SPI driver.
- Now there are multiple modes for CS handling: by PAL pad (previous one), by
PAL line, by PAL port mask and LLD-specific.
- Added circular continuous mode to the SPI driver.
- Improved CAN driver.
- Added callback capability to the CAN driver. Now it is possible to use
callbacks in place of classic events.
- Improved USB driver.
- Added a usbWakeupHost() function for standby exit.
- Modified the HAL queues to improve performance. Added new functions:
iqGetI(), iqReadI(), oqPutI() and oqWriteI().
*** What's new in EX 1.0.0 ***
- None changed.
*** What's new in STM32 HAL support ***
- Updated SPI drivers to implement the new circular mode of the HAL SPI
driver model.
- Updated STM32F1xx headers to 1.6, STM32F3xx to 1.9, STM32L0xx to 1.10,
STM32L4xx to 1.9, STM32H7xx to 1.1.
- Implemented PAL enhancements in GPIOv1, GPIOv2 and GPIOv3 implementations.
- Modified the STM32 OTGv1 driver to work without pump thread, transfers
are now done in the ISR.
- Added STM32L496xx/STM32L4A6xx support.
- Added STM32F030x4 support.
- Added initial STM32H7xx support.