***************************************************************************** *** Files Organization *** ***************************************************************************** --{root} - ChibiOS/RT directory. +--readme.txt - This file. +--documentation.html - Shortcut to the web documentation page. +--todo.txt - Current plan (development/unstable versions only). +--license.txt - GPL license text. +--exception.txt - GPL exception text (stable releases only). +--boards/ - Board support files. +--demos/ - Demo projects. +--docs/ - Documentation. | +--html/ - HTML documentation. | +--reports/ - Test reports. | +--src/ - Documentation source files (required for rebuild). | +--rsc/ - Documentation resource files (required for rebuild). | +--index.html - Documentation access. +--ext/ - External libraries, not part of ChibiOS/RT. +--os/ - ChibiOS/RT files. | +--hal/ - Hardware Abstraction Layer. | | +--include/ - HAL high level headers. | | +--src/ - HAL high level source. | | +--platforms/ - HAL low level drivers implementations. | | | +--AT91SAM7/ - Drivers for AT91SAM7 platform. | | | +--AVR/ - Drivers for AVR platform. | | | +--LPC11xx/ - Drivers for LPC11xx platform. | | | +--LPC13xx/ - Drivers for LPC13xx platform. | | | +--LPC214x/ - Drivers for LPC214x platform. | | | +--MSP430/ - Drivers for MSP430 platform. | | | +--SPC56x/ - Drivers for SPC56x/MPC563xx platforms. | | | +--STM32/ - Drivers for STM32 platform. | | | +--STM8/ - Drivers for STM8 platform. | | | +--Posix/ - Drivers for x86 Linux/OSX simulator platform. | | | +--Win32/ - Drivers for x86 Win32 simulator platform. | | +--templates/ - Driver template files. | | +--meta/ - Driver meta templates. | +--ports/ - Port files for the various architectures. | | +--GCC/ - Ports for the GCC compiler. | | | +--ARM/ - Port files for generic ARM architecture. | | | +--ARM7/ - Port files for ARM7 architecture. | | | +--ARMCM3/ - Port files for ARMCMx architectures (ARMv6/7-M). | | | +--PPC/ - Port files for PowerPC architecture. | | | +--AVR/ - Port files for AVR architecture. | | | +--MSP430/ - Port files for MSP430 architecture. | | | +--SIMIA32/ - Port files for SIMIA32 simulator architecture. | | +--cosmic/ - Ports for the Cosmic compiler. | | | +--STM8/ - Port files for STM8 architecture. | | +--RC/ - Ports for the Raisonance compiler. | | +--STM8/ - Port files for STM8 architecture. | +--kernel/ - Kernel portable files. | | +--include/ - Kernel headers. | | +--src/ - Kernel source. | | +--templates/ - Kernel port template files. | +--various/ - Various portable support files. +--test/ - Kernel test suite source code. | +--coverage/ - Code coverage project. +--testhal/ - HAL integration test demos. +--STM32/ - STM32 HAL demos. ***************************************************************************** *** Releases *** ***************************************************************************** *** 2.1.2 *** - FIX: Fixed typo in memstreams.h (bug 3089567)(backported to 2.0.6). - FIX: Fixed wrong macro check in LPC214x and AT91SAM7 serial drivers (bug 3088776)(backported to 2.0.6). - FIX: Fixed non functioning option SPI_USE_MUTUAL_EXCLUSION=FALSE (bug 3084764)(backported to 2.0.6). - FIX: Fixed wrong macro check in STM32 serial support (bug 3078891)(backported to 2.0.6). - FIX: Fixed non functioning option CH_USE_NESTED_LOCKS (bug 3075544) (backported to 2.0.6). - FIX: Incorrect AT91SAM7X initialization, thanks Leszek (bug 3075354) (backported to 2.0.5). - FIX: Fixed race condition in function chSchGoSleepTimeoutS(), thanks Balázs (bug 3074984)(backported to 2.0.5). - FIX: Fixed race condition in threads creation (bug 3069854)(backported to 2.0.5). - FIX: Fixed broken CH_DBG_ENABLE_STACK_CHECK option in legacy CM3 port (bug 3064274)(backported to 2.0.5). - FIX: Fixed CAN_USE_SLEEP_MODE setting (bug 3064204)(backported to 2.0.5). - FIX: Fixed potential issue with GCC reorganizing instructions around "asm volatile" statements (bug 3058731)(backported in 2.0.4). - FIX: Fixed reduced ARM7 performance with GCC 4.5.x (bug 3056866)(backported to 2.0.4). - FIX: Fixed crash of the Posix simulator under Ubuntu 10.4 (bug 3055329) (backported to 2.0.3). - FIX: Fixed incorrect PLL2 setting in STM32 HAL (bug 3044770)(backported in 2.0.3). - FIX: Fixed wrong check on STM32_HCLK (bug 3044758)(backported to 2.0.3). - FIX: Fixed wrong condition check in STM32 PWM driver (bug 3041414) (backported in 2.0.3). - FIX: Corrupted IRQ stack in Cortex-Mx port (bug 3041117)(backported to 2.0.3). - FIX: Fixed a documentation error regarding the ADC driver function adcStartConversion() (bug 3039890)(backported to 2.0.3). - NEW: New I2C driver model (not complete and no implementations yet). - NEW: New SPI driver model, the new model supports both synchronous and asynchronous operations and, in general, simplifies the implementation of the low level driver. The state diagram changed slightly changed so be careful. - NEW: New ADC driver model, the new model supports both synchronous and asynchronous operations and, in general, simplifies the implementation of the low level driver. The state diagram changed slightly changed so be careful. - NEW: Improved PWM driver model, added several macros that helps to setup configuration structures and to specify pulse widths also as percentages or degrees using a fixed point notation. Added new pwmEnableChannelI() and pwmDisableChannelI() APIs in order to allow channel reprogramming from within callbacks or interrupt handlers, the new APIs are implemented as macros so there is no footprint overhead. - NEW: Added driver fields and initialization hooks for the callback-based drivers. The hooks are named XXX_DRIVER_EXT_FIELDS and XXX_DRIVER_EXT_INIT_HOOK(). - NEW: Added to the UART driver the capability to return the number of not yet transferred frames when stopping an operation. - NEW: Added more compile-time checks to the various STM32 device drivers. - NEW: Improved LPC214x SPI driver, now it uses IRQs, it implements the new SPI device driver model. - NEW: Improved AT91SAM7 SPI driver, now it uses IRQs and DMAs, it implements the new SPI device driver model. - NEW: New LPC11xx SPI driver. - NEW: Added a simple STM32 ADC demo under ./testhal/STM32/ADC. - NEW: Added a simple STM32 CAN demo under ./testhal/STM32/CAN. - NEW: Added a simple STM32 PWM demo under ./testhal/STM32/PWM. - NEW: Added a simple STM32 SPI demo under ./testhal/STM32/SPI. - NEW: More assertions added to the kernel for improved bug fixing. - NEW: New kernel hooks: SYSTEM_TICK_EVENT_HOOK(), SYSTEM_HALT_HOOK(). - NEW: Added board files for the Olimex STM32-H103. - NEW: New kernel APIs chSysGetIdleThread() and chThdGetTicks(), the new APIs are simple macros so there is no footprint overhead. - NEW: Added a generic BaseFileStream interface for future File System implementations or integrations (untested and not sure if it will stay or change). - NEW: Added to the documentation more notes about interrupt handlers in the ARM7 port. - NEW: Modified some tests in order to bring back code coverage to 100% in all modules except chdebug.c. Added a test case covering binary semaphores. - OPT: The fix to the bug 3075544 considerably improved the threads creation benchmarks score. - OPT: Speed optimizations to the STM32 SPI driver, greatly improved latency. - OPT: Speed optimizations to the STM32 ADC driver. - CHANGE: The API chThdInit() has been renamed to chThdCreateI() in order to make clear it is usable from interrupt handlers. - CHANGE: The mailboxes macros chMBSize(), chMBGetEmpty(), chMBGetFull(), chMBPeek() have been renamed to chMBSizeI(), chMBGetFreeCountI(), chMBGetUsedCountI(), chMBPeekI(). - CHANGE: The queue APIs chQSize(), chQSpace(), chIQIsEmpty(), chIQIsFull(), chOQIsEmpty(), chOQIsFull() have been renamed to chQSizeI(), chQSpaceI(), chIQIsEmptyI(), chIQIsFullI(), chOQIsEmptyI(), chOQIsFullI(). - CHANGE: The event APIs chEvtPend() and chEvtClear() have been renamed to chEvtAddFlags() and chEvtClearFlags() for consistency and correct English. Changed the macro chEvtIsListening() in chEvtIsListeningI(). - CHANGE: Added a parameter to the PWM driver callbacks, the pointer to the driver itself. - CHANGE: Added a parameter to the UART driver callbacks, the pointer to the driver itself. - CHANGE: In the UART driver now an error does not automatically brings the receiver in UART_RX_IDLE state, the receive operation continues unless explicitly stopped in the error callback handler. This considerably simplifies the low level driver code. - CHANGE: Removed a spurious trailing ; after the WORKING_AREA() macro declaration in several ports. The ; should go after the macro invocation. - CHANGE: Modified the STM32 ADC driver to use the new DMA infrastructure. - CHANGE: Modified the STM32 SPI driver to use the new DMA infrastructure. - CHANGE: Added DMA cleanup code to the STM32 dmaInit() function. - CHANGE: Simplified preprocessor conditions in the STM32 serial driver. - CHANGE: Renamed most of the STM32 HAL settings macro names in order to make names more consistent. NOTE: ****** Make sure to use a mcuconf.h file taken from ****** ****** this version in your project. ****** - CHANGE: Renamed the existing system hooks by adding the _HOOK suffix to the name in order to make names more consistent. NOTE: ****** Make sure to use a chconf.h file taken from ****** ****** this version in your project. ****** - CHANGE: Extensive documentation improvements, fixed terminology in the events related documentation and articles. *** 2.1.1 *** - FIX: Fixed insufficient stack size for idle thread (bug 3033624)(backported to 2.0.3). - FIX: Fixed misspelled word in some chioch.h and chstreams.h macros (bug 3031534)(backported to 2.0.3). - FIX: Fixed wrong macro check in the STM32 SPI driver (bug 3028562)(backported to 2.0.3). - FIX: Fixed invalid context restore in MSP430 port (bug 3027975)(backported to 2.0.2). - FIX: Fixed STM32 vectors file (bug 3026528)(backported to 2.0.2). - FIX: Fixed race condition in STM32 SPI driver (bug 3025854)(backported to 2.0.2). - FIX: Fixed H_LOCK and H_UNLOCK redefined with CH_USE_MALLOC_HEAP (bug 3025549)(backported to 2.0.2). - FIX: Added option to enforce the stack alignment to 32 or 64 bits in the Cortex-Mx port (bug 3025133)(backported to 2.0.2). - NEW: Centralized DMA macros in the STM32 HAL. - NEW: New UART device driver model, this device driver allows unbuffered, callback driven access to UART-type devices. - NEW: UART device driver for STM32 and UART demo application under ./testhal/STM32/UART. - NEW: Added friendly interrupt vectors names to the STM32 HAL (change request 3023944). - NEW: Added support for SPI3 in the STM32 HAL. - CHANGE: Redeclared the IRQ handlers in the various STM32 drivers using the new friendly vector names. - CHANGE: Moved the STM32 HAL stess test application under ./testhal/STM32/_stress_test. - CHANGE: Removed the option -mabi=apcs-gnu from all the Cortex-Mx demos. The option is not compatible with the 64 bits stack alignment now default in the Cortex-Mx port. Note that the 64 bits alignment has a cost both as performance and as space but it is the "standard". - OPT: Small speed optimization in the STM32 SPI driver. - OPT: Optimized DMA clearing in STM32 ADC and SPI drivers, there was no need to read/modify/write the IFCR DMA register, it is write only. - Fixed various documentation errors. *** 2.1.0 *** - FIX: Fixed notification order in input queues (bug 3020708)(backported in 2.0.1). - FIX: Fixed non functional CH_CURRP_REGISTER_CACHE option in the Cortex-M3 port (bug 3020702)(backported in 2.0.1). - FIX: Fixed non functional CH_DBG_ENABLE_STACK_CHECK option in the Cortex-M3 caused by GCC 4.5.0, the fix also improves the context switch performance because GCC 4.5.0 apparently was generating useless instructions within the very critical context switch code (bug 3019738)(backported in 2.0.1). - FIX: Fixed insufficient stack space assigned to the idle thread in Cortex-M3 port (bug 3019594)(backported in 2.0.1). - FIX: Fixed missing check in chIQReadTimeout() and chIQWriteTimeout() (bug 3019158)(backported in 2.0.1). - FIX: Fixed instability in Mutexes subsystem (bug 3019099)(backported in 2.0.1). - FIX: Fixed broken AVR port (bug 3016619)(backported in 2.0.0). - FIX: Fixed assertion in adcStop() (bug 3015109)(backported in 2.0.0). - NEW: Merged the new unified STM8 port, now the port supports both the Cosmic and Raisonance compilers. - NEW: Added an STM8-DISCOVERY demo, the demo can be compiled with both the Cosmic and Raisonance compilers under the STDV IDE. Performance reports have been added for both compilers. NOTE: The Raisonance compiler seems to have problems in debugging under the STDV IDE, if you need to debug using the Raisonance compiler consider using the RIDE7 IDE instead. Compiling and executing using the "release" mode under STDV works fine. - NEW: Added timers clock macros to the STM32 clock tree HAL driver (backported in 2.0.1). - NEW: Added Binary Semaphores among the synchronization primitives. The new subsystem is entirely implemented as macros over the existing and proven Counting Semaphores thus takes no space (experimental). - NEW: Added a simplified SPI driver for AT91SAM7 devices, contributed by Alexander (experimental). - NEW: Added FatFs demos for AT91SAM7S and AT91SAM7X, contributed by Alexander (experimental). - OPT: Simplified the test suite code, now it is smaller. - Reorganized the documentation, now the description of the device drivers implementation is under the HAL module instead of the Ports module. *** 1.5.9 *** - FIX: Fixed STM8 baud rate setup error (bug 3010990). - FIX: Fixed STM8 UART3 driver (bug 3009145). - NEW: Added a STM8_ENABLE_WFI_IDLE option to the STM8 port, the default is FALSE. - OPT: Small size optimization in the semaphores subsystem. - OPT: Improvements in the STM8 port, the code is now smaller and generally faster, also saved few bytes of RAM. - Added explicit casts in chevents.h, chqueues.h, chqueues.c in order to silence some warnings on a specific compiler. - Added a section in chconf.h where redefine the port-related configuration parameters, also added notes into the documentation about this. *** 1.5.8 *** - FIX: Fixed missing files from ST library zip file (bug 3006629). - NEW: Added a demo for the AT91SAM7S256 and board files for the Olimex SAM7-P256. The demo has been contributed by Alexander Kozaruk. - Fixed some wrong paths into the demos readme files. - Formatting fixes to the port templates. - Added notes about copyright assignment to the documentation. Fixed some problems in the licensing FAQ page. - Added documentation article about events in ChibiOS/RT. *** 1.5.7 *** - FIX: Fixed missing SPI driver reinitialization in the MMC driver (bug 3005628)(backported in 1.4.4). - FIX: Fixed wrong inclusion order of board.h and halconf.h into hal.h (bug 3005041)(backported in 1.4.4). - FIX: Fixed wrong GPIO ports size in the STM8 PAL driver (bug 3001528). - NEW: Improved clock initialization for the STM32, now it is possible to configure the clock using any clock source and any HSE frequency. - NEW: The STM32 clock tree parameters and checks are now calculated into a separate file in order to support multiple clock trees for different sub-families of the STM32 platform. - NEW: Added separated clock trees for the STM32 LD/MD/HD sub-family and the CL sub-family. Now the selection of the sub-family is done in the board.h file, there is no more the need to put -DSTM32F10X_xx into the makefile. - NEW: Added the palSetBusMode() capability to the STM8 PAL driver. - NEW: Added the palSetBusMode() capability to the LPC11xx and LPC13xx PAL drivers. - NEW: Updated the STM32 FW Library files to latest version 3.3.0. - CHANGE: Renamed the STM32, STM8, LPC214x, AT91SAM7x, MSP430 and simulators PAL configuration structures to PALConfig, it is better to have the same name for this structure in all ports (like for all the other drivers). - CHANGE: Modified the linker scripts in the ARM demos in order to increase compatibility with the CodeSourcery toolchain. - Tested the STM8 port with the latest RKit-STM8_2.28.10.0092. It works but the new compiler shows a slight performance regression except in one test case. - Added credits page to the documentation, improved the article regarding timings. - Performed another documentation revision cycle, fixed more bad English and few errors. *** 1.5.6 *** - FIX: Fixed centralized ARM makefile (bug 2992747)(backported in 1.4.3). - FIX: Fixed write problems in MMC_SPI driver (bug 2991714)(backported in 1.4.3). - FIX: Fixed wrong macros in chioch.h (bug 2989468). - FIX: Fixed wrong macro check in serial.h (bug 2989459)(backported in 1.4.3). - NEW: Added a ROMCONST macro in chtypes.h, this macro must be used for constant that must be placed in code space, it should not be assumed that the "const" keyword does that. Note that this macro is not used to place constants in different address spaces (AVR) because it is assumed that a pointer to a ROMCONST variable is compatible with a normal pointer. - NEW: AT91SAM7 HAL support for the DGBU UART peripheral, as SD3. - NEW: Introduced a new macro CH_FAST_IRQ_HANDLER() for the declaration of fast interrupt handlers on those architectures that support them. - OPT: Internal optimization in the serial driver, it now is a bit smaller and uses less RAM (all architectures). - CHANGE: Modified the STM32 FatFs demo, now it spawns a command shell or the serial port SD2, type "help" for the available commands. More commands can be easily added. - CHANGE: Renamed the chCoreFree() function in chCoreStatus() because it might be mistaken for a function that frees memory. - CHANGE: All ARM demos makefiles now defaults to arm-none-eabi- GNU toolchains because the latest YAGARTO now uses that setting. It is still possible to use arm-elf- toolchains by editing the TRGT variable in the makefiles. - Various documentation fixes, added new articles covering debugging under ChibiOS/RT, OS integration, OS stop and restart. Updated the article about interrupt handlers to cover also fast interrupt sources, updated the article about the OS porting. - Long overdue test code cleanup and documentation. - Added new test cases, now the coverage is again up to 100% except for the debug module that would require triggering system terminating tests (panics), the uncovered code is minimal, extremely simple and working anyway. - ChibiOS/RT has been successfully verified with the latest GCC 4.5.0. *** 1.5.5 *** - FIX: Removed some "dead" code in the old ARMv7-M files (there are new ones, see below). - NEW: LPC13xx support, drivers (Serial, PAL, HAL), demo and reports. - NEW: Added statistic info to the lwIP demo. - CHANGE: Renamed LPC111x port and platform in LPC11xx, minor fixes to the platform header files. - CHANGE: Small documentation fixes and improvements. - OPT: New Cortex-M3 port code, *huge* performance improvements in all the context switching related benchmarks (up to 18% depending on the benchmark). The new code does no more require the use of the PendSV vector that is thus available to the user, it also saves four RAM bytes for each thread in the system. The old code is still available as a fall back option while the new one is being hardened by peer review and time, the two ports are perfectly interchangeable. *** 1.5.4 *** - FIX: Fixed broken CH_CURRP_REGISTER_CACHE option in the ARM7 port (bug 2973365). - FIX: Fixed missing memory recovery on thread reference release in chRegNextThread() (bug 2971878). - FIX: Fixed wrong thread state macro in STM32/spi_lld.c (bug 2968142). - NEW: New unified ARM Cortex-Mx port, this port supports both the ARMv6M and ARMv7-M architecture (Cortex-M0/M1/M3/M4 so far). The new port also allow to easily add to new Cortex-M implementations by simply adding a parameters file (cmparams.h). - NEW: Embedded Artists LPCxpresso Base Board support files added. - NEW: LPC111x support, drivers (Serial, PAL, HAL) and demo. - NEW: The port layer now can "capture" the implementation of individual scheduler API functions in order to provide architecture-optimized versions. This is done because further scheduler optimizations are becoming increasingly pointless without considering architecture and compiler related constraints. - NEW: Added support for the STM8 large memory model to the STM8 port. Now the assembler port code is totally inlined and the chcoreasm.asm file has been removed. - NEW: Added RIDE7 project files to the STM32 demo under a ./ride7 subdirectory, this should make things easier for RIDE7 users. The normal makefile is still available of course. - NEW: New articles and guides in the documentation. - NEW: Documentation improvements, now the description goes on top of each page, doxygen defaulted it in the middle, not exactly the best for readability. Improved many descriptions of the various subsystems. Fixed a misplaced page (STM8 port). - OPT: Optimization on the interface between scheduler and port layer, now the kernel is even smaller and the context switch performance improved quite a bit on all the supported architectures. - OPT: Simplified the implementation of chSchYieldS() and made it a macro. The previous implementation was probably overkill and took too much space even if a bit faster. - CHANGE: Modified the Cortex-M3 port to be a more generic Cortex-Mx port, changes were required to the startup code and the port code because the reduced instruction set of the Cortex-M0 (there are two code paths now, both optimized). - CHANGE: Modified the SysTick initialization for STM32 to use the system clock rather than the external clock. - CHANGE: Exiting from a chCondWaitTimeout() because a timeout now does not re-acquire the mutex, ownership is lost. - CHANGE: The module documentation has been moved from the kernel.dox file to the various source code files in order to make it easier to maintain and double as source comments. - CHANGE: Updated CMSIS files to version 1.3 and fixed the warnings in there, again... *** 1.5.3 *** - FIX: Removed C99-style variables declarations (bug 2964418)(backported in 1.4.2). - FIX: Fixed missing reschedule in chEvtSignal() (bug 2961208)(backported in 1.4.2). - NEW: Added STM8 port and demo, the demo targets the Raisonance REva board with STM8S208RB piggyback. - NEW: Enhanced the kernel size report to cover more cases. - NEW: Improvements to the documentation. - OPT: Minor optimizations in the "compact" code path. *** 1.5.2 *** - FIX: Fixed wrong UART deinitialization sequence in LPC214x serial driver (bug 2953985)(backported in 1.4.1). - FIX: Fixed wrong PINSEL2 offset into lpc214x.h (bug 2953981)(backported in 1.4.1). - FIX: Fixed invalid UART-related macro in the LPC214x HAL (bug 2953195) (backported in 1.4.1). - FIX: Impossible to enforce alignment greater of a pointer size for heap/core objects (bug 2952961). - FIX: Wrong prototype in template file chcore.c (bug 2951529)(backported in 1.4.1). - NEW: Added an experimental PowerPC port targeting the SPC563M/MPC563xM ST/Freescale automotive SOCs. The port passed the whole test suite but it will be developed further in next releases. - NEW: Added core variant name macro in chcore.h and platform name in hal_lld.h, the info are printed in the test report and from the "info" shell command. - NEW: Added BOARD_NAME macro to the various board.h files. - NEW: Added a MemoryStream class under ./os/various. - CHANGE: Removed an instance of a structure without name from test.h for increased portability of the test suite. - NEW: Added Mac OS-X support for the simulator. The Linux simulator has been renamed to Posix simulator in order to include this change in a single project. - NEW: New articles, sections and various improvements to the documentation. - CHANGE: Renamed the kernel header files to match the names of their source files. The change was also required in order to make the names less "generic" and less likely to match names in external libraries. *** 1.5.1 *** - FIX: Fixed insufficient stack space for the idle thread in the ARMCM3 port when compiling without optimizations (bug 2946233)(backported in 1.4.1). - FIX: Fixed wrong notes on function chThdResume() (bug 2943160)(backported in 1.4.1). - NEW: Implemented the concept of thread references, this mechanism ensures that a dynamic thread's memory is not freed while some other thread still owns a reference to the thread. Static threads are not affected by the new mechanism. Two new APIs have been added: chThdAddRef() and chThdRelease(). - NEW: Now more than one thread can be waiting in chThdWait() as long they own a reference. - NEW: Implemented a new threads registry subsystem, the registry allows to enumerate the active threads at runtime and/or from a debugger. This is a preparatory step for a dedicated ChibiOS/RT debugger. - NEW: New chCoreFree() API that returns the core memory left. - NEW: Added to the simulators shell demos two new commands: threads and mem, that show the currently active threads (using the new registry) and the memory allocators state. - CHANGE: Doxygen tags cleanup in all the system code, comments are better looking now. - CHANGE: Documentation improvements. *** 1.5.0 *** - FIX: Fixed missing dependencies check for CH_USE_DYNAMIC (bug 2942757) (backported in 1.4.1). - FIX: Fixed swapped thread states descriptions (bug 2938445)(backported in 1.4.1). - FIX_ Fixed C99-style variable declaration (bug 2938444)(backported in 1.4.1). - FIX: Fixed parameter check in sdStart() function (bug 2932922)(backported in 1.4.0). - FIX: Fixed missing platform.mk file in MSP430 port (bug 2933735)(backported in 1.4.0). - CHANGE: Removed the unnamed union from the thread and heaps structures, some compilers do not support this non standard construct. - CHANGE: Removed the empty structures from the streams/channels headers. - CHANGE: Modified the thread-related constant macros to have a THD_ prefix. - CHANGE: Modified NULL assignments to function pointers to use an explicit cast because some compilers issue warnings without the cast. - OPT: Speed/size optimization to the events subsystem. - OPT: Speed/size optimization to the mutexes subsystem. - OPT: Speed/size optimization to the condvars subsystem. - OPT: Speed/size optimization to the synchronous messages subsystem. - NEW: Added support for STM32/HD/CL UART4 and UART5, thanks Egon for the patch. *** 1.3.8 *** - FIX: Fixed dequeuing in lifo_remove() function (bug 2928142). - FIX: Fixed spurious character generation in MSP430 serial driver (bug 2926838). - NEW: Introduced an abstract streams interface BaseSequentialStream. - NEW: Added timeout specification to the I/O queues read/write primitives. - NEW: Added support for HD and CL STM32 devices in the vectors table. - CHANGE: Modified the BaseChannel interface in order to make it a BaseSequentialStream descendant. - CHANGE: Updated the serial driver model in order to expose the BaseSequentialStream methods. - CHANGE: The behavior of the read/write primitives is changed, now the functions are synchronous and do not return until the specified number of bytes have been transferred or a timeout occurs, the old behavior can be replicated by specifying TIME_IMMEDIATE as timeout. Another difference is that specifying zero as bytes number is like specifying the largest size_t plus one, zero was an illegal value before. - CHANGE: Simplified the LPC214x driver by removing the option to not use the FIFO preload feature. Setting LPC214x_UART_FIFO_PRELOAD to 1 results in the same behavior. - Documentation fixes and improvements, testing strategy explained. - Added article about waking up threads from IRQ handlers. *** 1.3.7 *** - FIX: Fixed duplicated definition of SPI_USE_MUTUAL_EXCLUSION (bug 2922495). - FIX: Fixed coverage tool hanging during execution (bug 2921120). - FIX: Fixed Linux simulator startup message (bug 2921012). - FIX: Fixed section separators comments into the HAL-related files. Now all the files should use the same style. - NEW: Improved HAL configuration file. - NEW: Introduced a new, per-project, MCU configuration file mcuconf.h that contains all the drivers related settings. - NEW: Readability improvements to the channels code. - NEW: Serial driver model improvements, added states management and checks, added a new SD_NOISE_ERROR error event. - NEW: Improvements and optimizations in the various serial driver implementations. - Documentation fixes and improvements. *** 1.3.6 *** - FIX: Fixed missing STM32 PWM low level driver error in platform.mk by adding the driver files (bug 2913560). - NEW: The Linux simulator now works again, also supports the serial drivers over TCP/IP and has a command line interface like the Win32 simulator. - NEW: STM32 PWM driver implementation. - NEW: LPC214x SPI driver implementation (SSP only, polled mode, no IRQ), this driver replaces the old, not HAL compatible, SSP driver. - NEW: LPC214x FatFS demo added, LPC214x minimal demo removed, LPC214x "normal" demo reduced to work like all the other generic demos. - NEW: Added custom mode settings to the STM32 PAL driver: - PAL_MODE_STM32_ALTERNATE_PUSHPULL - PAL_MODE_STM32_ALTERNATE_OPENDRAIN - NEW: Included all the board-specific files into a new directories structure under ./boards, this allows to not duplicate the board files into each demo. - CHANGE: Changes to the PWM driver model, made it simpler. - CHANGE: The STM32 device drivers now no more configure the I/O pins on initialization. Pins must be configured in board.h, the change was required in order to support the STM32 AFIO remapping feature. - CHANGE: Removed the mmcsd.c driver, it is replaced by the generic MMC_SPI driver present into the HAL. - CHANGE: Updated the GPL exception text in the documentation, this should be the final text for the stable version 1.4.x. *** 1.3.5 *** - FIX: Fixed problem with memory core allocator (bug 2912528). - FIX: Fixed problem with CH_USE_MEMCORE option (bug 2912522). - FIX: Fixed some problems in the MMC_SPI driver (bugs 2901084 and 2901172). - NEW: Added a command line shell component, modified the Win32 simulator in order to use the new shell. The shell can be used under any architecture, it just requires an I/O channel. Custom commands can be easily added. - NEW: Unified the initialization of the various drivers from a single HAL driver. The single drivers can be enabled or disabled from a HAL configuration file halconf.h. - NEW: New CAN driver model. - NEW: New PWM driver model. - NEW: STM32 ADC driver implementation with DMA support. - NEW: STM32 CAN driver implementation. - NEW: Extended the support to all the SAM7X and SAM7S devices thanks to code contributed by Liam Staskawicz. - NEW: Improvements to the AT91SAM7 startup code contributed by Liam. - NEW: Added test report for MSP430 running from the external high speed oscillator. - NEW: HAL stress test for STM32 added, the demo is located under ./testhal/STM32. The demo code also shows how to use the ADC, CAN and SPI drivers. - CHANGE: Removed the MII from the standard drivers, now it is part of the AT91SAM7 support, the header mii.h is still part of the HAL. - CHANGE: In the STM32 drivers now the DMA errors are handled by hook macros rather than by events. The default action is to halt the system but users are able to override this and define custom handling. - CHANGE: In the Cortex-M3 port, modified the NVICEnableVector() function to make it clear pending interrupts. - CHANGE: Minor changes to the ADC driver model. *** 1.3.4 *** - FIX: Fixed bug in STM32 PAL port driver (bug 2897636). - FIX: Fixed problem with ARM-CM3 context switch when compiled at level -O0 (bug 2890382). - FIX: Fixed wrong conditional in chschd.c (bug 2888836). - FIX: Fixed wrong macro in chheap.c (bug 2888833). - FIX: Fixed AIC initialization in AT91SAM7X support (bug 2888583). - NEW: New SPI (master) driver model. - NEW: SPI driver for STM32 implementing the new SPI driver model. - NEW: New ADC (streaming capable) driver model. - NEW: Generic MMC (over SPI) driver. - NEW: Added a STM32 demo that integrates the MMC driver and the FatFs file system. - NEW: Implemented I/O redirection on a serial driver into syscalls.c, now it is possible (but not recommended) to use printf()/scanf() etc. An usage example is in the new MMC/FatFs demo. Note the extra -D... into the Makefile. - CHANGE: Moved the STM32 firmware library under ./ext, this way there is no need to duplicate it in each demo program. - CHANGE: Moved the file stm32f10x.h from the demos to the platforms support directory. *** 1.3.3 *** - FIX: Fixed bug in the LPC2148 PAL driver (bug 2881380). - FIX: Fixed bug in the AT91SAM7X PAL driver (bug 2879933). - NEW: New MAC and MII driver models and implementations for the AT91SAM7X. Removed the old EMAC driver, updated the uIP WEB demo to use the new driver model. - NEW: Added a simple lwIP demo (web server) for the AT91SAM7X. - NEW: Centralized core memory manager. This simple allocator implements a sbrk()-like API: chCoreAlloc(). The other allocators now use this manager in order to get memory blocks. - NEW: The heap allocator has been modified, now it is possible to have multiple heaps. The default heap gets its memory from the new core memory manager. - NEW: Now memory pools can optionally get new objects automatically from the core memory manager. - NEW: Added newlib interface file syscalls.c under ./os/various for use with the newest YAGARTO releases. The file provides bindings between the C runtime and the core memory manager. - CHANGE: Because the changes in the allocators some API prototypes changed: chHeapAlloc(), chHeapStatus(), chThdCreateFromHeap(). - CHANGE: Because the changes in the allocators some configuration options changed and some were removed, see the new template chconf.h file. - CHANGE: renamed ./demos/ARM7-AT91SAM7X-WEB-GCC in ARM7-AT91SAM7X-UIP-GCC. - FIX: Added the most restrictive GCC warning option to the makefiles (-Wextra) and fixed some warnings in the code, mostly unused function parameters. *** 1.3.2 *** - FIX: Fixed GCC 4.4.x aliasing warnings (bug 2846336)(backported in stable branch). - FIX: Modified linker scripts for GCC 4.4.x (bug 2846302)(backported in stable branch). - FIX: Fixed the CH_OPTIMIZE_SPEED option in the CM3 port (bug 2846278) (backported in stable branch). - FIX: Fixed GCC 4.4.x related problems in CM3 port (bug 2846162)(backported in stable branch). - FIX: Fixed LPC214x UART problem (bug 2841088)(backported in stable branch). - NEW: Improved the Cortex-M3 preemption code, now less interrupt-related jitter is generated and all benchmarks scores improved a bit. - NEW: Added new APIs chSchDoYieldS() and chThdYield(). - MEW: Added new benchmark about RAM footprint. - MEW: Added new benchmark about round robin rescheduling. - NEW: Reorganized and rationalized the distribution tree and the documentation. - NEW: Enhanced serial driver. The driver now supports speed change at runtime and low power stop mode. - NEW: Serial driver removed from the kernel and added to the I/O subsystems together with PAL. Note that the related API names changed their prefix from chFDDxxx to sdxxx because of this. - NEW: Added standard CMSIS 1.2.0 support to the Cortex-M3 port. The kernel does not use it (the OS uses its own optimized code) but the functionality is available to the applications. The CMSIS files were patched in order to correct some warnings. - NEW: Updated the STM32 port to use the newest ST firmware library files (version 3.1.0). Note that now the ST drivers are included in the STM32 demo directory. - NEW: Improved makefiles and makefile fragments, now the paths are not fixed, the fragments can be included also from projects outside the ChibiOS/RT files structure by simply defining the variable ${CHIBIOS}. - CHANGE: Removed the CH_USE_SERIAL_FULLDUPLEX configuration option because the serial driver is no more part of the kernel. - CHANGE: Reorganized the PAL and Serial identifiers now IOPORT1..N and SD1..N rather than IOPORT_A..Z and COM1..N, some of the old names were conflicting with some AVR libraries. *** 1.3.1 *** - FIX: Removed mention of an obsolete option from the documentation (bug 2799507). - NEW: Abstract digital I/O ports driver (PAL), this driver defines a common interface for digital I/O operations, this should help to create more portable applications and, in general, make easier to work with ChibiOS/RT on multiple architectures. - NEW: Port drivers for STM32, LPC214x, AT91SAM7X and MSP430, cleaned up the initialization code in board.c. All the demos now use PAL for I/O. AVR is not supported because its "sparse" registers layout, it would not be efficient enough for my taste. - Modified the STM32 demo to use the bit definitions in the ST header file, removed the bit definitions in board.h and stm32_serial.h. - Documentation section reorganization and fixes. - Changed the STM32 demo stack sizes, it was incorrectly adjusted in version 1.3.0 but it did not create problems (not a bug). *** 1.3.0 *** - FIX: Fixed regression in MinGW demo (bug 2745153)(backported in stable branch). - FIX: Fixed problem with the timeout constant TIME_IMMEDIATE, added a specific test in the test suite (bug 2755170)(backported in stable branch). - FIX: Fixed a problem in semaphores test case #2 (bug 2755195)(backported in stable branch). - FIX: Removed unused list functions (bug 2755230)(backported in stable branch). - FIX: Added license notice to several files (bug 2772160)(backported in stable branch). - FIX: Found new instances of the obsolete function chSysGetTime() in the C++ wrapper and in the WEB demo (bug 2772237)(backported in stable branch). - FIX: Fixed macro in test.h (bug 2781176)(backported in stable branch). - FIX: Fixed sequence assertion in test.c (bug 2789377)(backported in stable branch). - FIX: Fixed test_cpu_pulse() incorrect behavior (bug 2789383)(backported in stable branch). - FIX: Fixed missing volatile modifier for p_time field in Thread structure (bug 2789501)(backported in stable branch). - FIX: Fixed C99-style variable declarations (bug 2792919)(backported in stable branch). - FIX: Fixed instance of obsolete CH_USE_TERMINATE option in the C++ wrapper (bug 2796065)(backported in stable branch). - FIX: Insufficient stack allocated to the C++ LPC2148 demo (bug 2796069) (backported in stable branch). - FIX: Fixed errors in events test case (bug 2796081)(backported in stable branch). - NEW: Abstract I/O Channels mechanism introduced. This mechanism allows to access I/O resources through a standard interface and hides implementation details. The existing serial drivers were modified to offer a standard channel interface to the applications (the old APIs are retained as macros). - NEW: The I/O queues code was improved, now there are 2 separate structures: InputQueue and OutputQueue. There are some changes in the queue APIs in order to make them more symmetrical and functional. Improved the queues documentation. Some of the changes were needed in order to support the new channels mechanism as a backend for queued serial drivers. - NEW: Static initializers macros introduced for most kernel objects. The static initializers allow to not have to chXXXInit() any object and save some code space. The initialization functions are retained in order to allow initialization of dynamic objects and re-initializations. - NEW: Added more test cases in order to improve the test suite code coverage (it was 74% in version 1.2.0, it is now close to 100%). - NEW: Added test cases for the improved queues and serial drivers. - NEW: Added a code coverage analysis application under ./tests/coverage. - NEW: Added the test suite documentation to the general documentation. - NEW: Added a new "naked" context switch benchmark that better defines the real context switch time, previous benchmarks introduced too much overhead to the measurement. The STM32 performs the context switch in under 1.48uS. - NEW: Improved priority inheritance test cases. - NEW: Added architecture name strings to the port code. - NEW: Linux x86 simulator demo added. It is still work in progress. - CHANGE: Removed the half duplex queues and half duplex serial drivers because it was never extensively tested. The code is still available but not as part of the kernel. - CHANGE: Removed the chMsgSendWithEvent() function. It is rarely used and the functionality can be re-created with a compound atomic operation. Also removed the CH_USE_MESSAGES_EVENT configuration option. - CHANGE: Modified the test suite assertions in order to save RAM on the AVR targets. The test suite now uses much less string space. - CHANGE: Removed the CH_USE_SERIAL_HALFDUPLEX, CH_USE_QUEUES_TIMEOUT, CH_USE_QUEUES_HALFDUPLEX, CH_USE_SEMAPHORES_TIMEOUT configuration options. - CHANGE: Made CH_DBG_THREADS_PROFILING default to TRUE in all demos because the changes to the function test_cpu_pulse(). - CHANGE: Increased main stack size to 1KiB for all the ARMx demos, 2KiB for the C++ LPC2148 demo. This should make things easier for unexperienced users. *** 1.2.0 *** - Added license exception text to the 1.2.0 branch. - FIX: Fixed serious AVR regression (bug 2731578). - FIX: Fixed build failure when CH_USE_MUTEXES=FALSE (bug 2730706). - FIX: Removed reference to an obsolete function (bug 2731661). - Full test cycle and test reports updated. - Small fixes to the documentation. *** 1.1.3unstable *** - FIX: Fixed makefile in STM32 demo, this bug was reported fixed in version 1.1.2 but it was still there (bug 2686451). - FIX: Fixed makefile in MSP430 demo (bug 2700690). - FIX: Fixed thumb mode build error in AT91SAM7X demos (bug 2700695). *** 1.1.2unstable *** - FIX: Fixed priority inheritance problem with condvars (bug 2674756) and added a specific test case to the test suite (backported in stable branch). - FIX: Fixed a problem in time ranges (bug 2680425)(backported in stable branch). - FIX: Build error with option CH_DBG_FILL_THREADS (bug 2683965). - FIX: Fixed a wrong parameter check in chVTSetI() and chThdSleep() (bug 2679155). - FIX: Build error with options CH_USE_NESTED_LOCKS && !CH_OPTIMIZE_SPEED (bug 2678928). - FIX: Removed unused chSysPuts() macro (bug 2672678). - FIX: Renamed function chSysInTimeWindow() as chTimeIsWithin() and renamed the macro chSysGetTime() in chTimeNow(), the old names are still recognized but marked as deprecated (fixes the bug 2678953 but goes a bit further by introducing a new API category "Time"). - FIX: Fixed makefile problems in the AT91SAM7X256 and STM32 demos (bugs 2686347 and 2686451). - FIX: Fixed AT91SAM7X256 EMAC driver (bug 2686349). - FIX: Fixed small some errors in the documentation (bug 2692510). - OPT: Small optimization to the Cortex-M3 thread startup code, improved thread related performance scores and smaller code. - OPT: Alternative, non-inlined and more compact, implementations for port_lock() and port_unlock() in the Cortex-M3 port when CH_OPTIMIZE_SPEED is FALSE. - OPT: Improved ready list and priority ordered lists code, some space saved, better context switch performance. - Modified the test thread function to return the global test result flag. - Removed testcond.c|h and moved the test cases into testmtx.c. Mutexes and condvars have to be tested together. - Added architecture diagram to the documentation. - Removed from the documentation some references to long gone functions... *** 1.1.1unstable *** - FIX: Fixed a problem into the STACK_ALIGN() macro (backported in stable branch). - FIX: Fixed a problem with a wrong declaration of the PLL structure in the file lpc214x.h (backported in stable branch). - FIX: Fixed build problem with the C++ demo (bug 2687489). - FIX: Removed EMAC driver from the AT91SAM7X256 demo makefile (bug 2686347). - FIX: Removed C++ wrapper from the STM32 demo makefile (bug 2686451). - FIX: Fixed a problem with some event APIs not showing in the documentation (backported in stable branch). - FIX: Fixed wrong assertions in chThdWait() and chHeapFree() (backported in stable branch). - FIX: Fixed @file tag in sam7x_serial.c (bug 2788573) (backported in stable branch). - FIX: Fixed a small problem in the chcore.c template file. - NEW: Mailboxes (asynchronous messages) subsystem and test cases added. - NEW: Most APIs with a timeout specification now accept the constant TIME_IMMEDIATE (-1) that triggers an immediate timeout when trying to enter a sleep state. - NEW: Mode flexible debug configuration options, removed the old CH_USE_DEBUG and CH_USE_TRACE. Replaced with CH_DBG_ENABLE_CHECKS, SCH_DBG_ENABLE_ASSERTS, CH_DBG_ENABLE_TRACE and CH_DBG_FILL_THREADS. - NEW: Added a debug option CH_DBG_THREADS_PROFILING for threads profiling. A field into the Thread structure counts the consumed time. The information is not used into the kernel, it is meant for debugging. - NEW: Added a debug option CH_DBG_ENABLE_STACK_CHECK for stack overflow checking. The check is not performed in the kernel but in the port code. Currently only the ARM7 and ARMCM3 ports implements it. - NEW: Unified makefiles for ARM7, ARMCM3 MSP430 projects, the new makefiles share a common part making them easier to maintain. Also reorganized the demo-specific part of the makefile, now it is easier to configure and the option can be overridden from outside. - CHANGE: Changed the chSemFastWaitS() macro in chSemFastWaitI() and chSemGetCounter() in chSemGetCounterI(). - CHANGE: Removed the port_puts() function from the port templates. It was not implemented on all ports. - Improvements to the test suite, added a new level of indirection that allows to make tests depend on the configuration options without have to put #ifs into the test main module. New benchmarks about semaphores and mutexes. *** 1.1.0unstable *** - FIX: Modified the default value for the STM32 HSI setup it was 1, it should be 0x10 (backported in stable branch). - FIX: Removed an obsolete constant (P_SUSPENDED) from thread.h (backported in stable branch). - FIX: Removed unused field mp_grow in the MemoryPool structure (backported in stable branch). - NEW: Added to the STM32 demo makefile an option to build ChibiOS/RT with the full STM32 FWLib 2.03. **NOTE**, except for the makefile option, the library is not used by the OS nor required (backported in stable branch). - NEW: Better separation between the port code and the system APIs, now an architecture-specific "driver" contains all the port related code. Port functions/macros are no more directly exposed as APIs to the user code. - NEW: Added a configuration option to enable nested system locks/unlocks. - NEW: Improved the interrupt handlers related code. Now interrupts are handled in a very similar way in every architecture. See the "Concepts" section and the "Writing interrupt handlers under ChibiOS/RT" article in the documentation. - NEW: Added the chEvtSignal() and chEvtSignalI() APIs that allows direct thread signaling, much more efficient that chEvtBroadcast() when the target is a known single thread. - NEW: Added a configuration option that enables the priority enqueuing on semaphores. It is defaulted to off because usually semaphores are used for I/O related tasks without hard realtime requirements. - NEW: Now the all the options in chconf.h and the various driver headers can be overridden externally, as example from within the Makefile. The options are no mode a simple define but a define with an assigned TRUE/FALSE value within an #ifndef block. - NEW: Idle thread hook macro added to the configuration file. - NEW: Changed the ARM7 and Cortex-M3 startup files, now the action when the main() function returns can be overridden by redefining the symbol MainExitHandler. - OPT: Improved ARM7 thumb port code, thanks to some GCC tricks involving registers usage now the kernel is much smaller, faster and most OS APIs use less RAM in stack frames (note, this is an ARM7 thumb mode specific optimization). - CHANGE: Now the API chThdSetPriority() returns the old priority instead of void. - CHANGE: Modified the signature of the chMsgSendWithEvent() API, it now uses a more efficient event signaling method. - CHANGE: Removed the field p_tid from the Thread structure and the related code, this improved the thread creation scores (~2%) and saves some RAM. The trace buffer field cse_tid is now populated with a simple hash of the thread pointer as thread identifier. - CHANGE: Renamed the macros chSysIRQEnter() and chSysIRQExit() in CH_IRQ_PROLOGUE() and CH_IRQ_EPILOGUE() in order to make very clear that those are not functions but inlined code. Also introduced a new macro CH_IRQ_HANDLER that should be used when declaring an interrupt handler. - CHANGE: Renamed several internal initialization functions by removing the "ch" prefix because could not be considered system APIs. - Improved ARM7 and Cortex-M3 support, new configuration options. - Introduced the concept of interrupt classes, see the documentation. - Introduced the concept of system states, see the documentation. - Huge improvements to the documentation. - Articles and notes previously in the wiki now merged in the general documentation and updated, the wiki entries are obsolete and will be removed. - New application notes and articles added. - Added kernel size metrics to the test reports. - Removed the inclusion graph from the documentation because the little info they add and the size of all the images. It is possible to configure Doxygen to have them again (and more graph types). *** 1.0.0 *** - License switch, added GPL exception, see exception.txt. - Full test cycle and test reports updated. - Renamed some occurrences of "Conditional Variable" in "Condition Variable" in the documentation. - FIX: Fixed some images in the documentation because problems when seen in Internet Explorer. *** 1.0.0rc3 *** - FIX: Fixed a nasty regression to the timeout unified code that affected some APIs since version 0.5.3. See the bug tracker for more details. Added a test case about this. - FIX: Removed the API chThdSuspend() there was a conceptual flaw and I want to think about the whole concept again before introducing something similar in future. Anyway, it is possible to replicate the functionality using chSchGoSleepS(). - Fixed typos here and there. - Updated the states diagram in the documentation. *** 1.0.0rc2 *** - FIX: Removed unused variable "retaddr" from the Cortex-M3 port. - FIX: The macro THD_WA_SIZE was defined wrongly in the file ./src/templates/chcore.h. - Fixed some errors in the documentation. *** 1.0.0rc1 *** - NEW: Added new macros CH_KERNEL_VERSION set to "1.0.0rc1", CH_KERNEL_MAJOR set to 1, CH_KERNEL_MINOR set to 0, CH_KERNEL_PATCH set to 0. The macros will be updated to reflect the actual kernel version number. - NEW: Made all the port-specific configuration settings externally configurable, see the documentation. - FIX: Disabled the configuration option CH_USE_MESSAGES_PRIORITY from the MSP430 demo, the default for this option should be off. - FIX: Fixed a bug that prevented the THREAD_EXT_FIELDS to be compiled into the Thread structure. - FIX: Removed some references to deprecated APIs from the test suite. - FIX: Set the INT_REQUIRED_STACK configuration value for the ARM7 port to a safer 0x10, it was previously 0 (correct but trimmed to specific compiler settings). - FIX: Set the INT_REQUIRED_STACK configuration value for the AVR port to a safer 32. - FIX: Fixed the MinGW demo in order to not use any deprecated construct. - Removed deprecated threads APIs: chThdCreate() and chThdCreateFast(). - Removed deprecated events APIs: chEvtWait(), chEvtWaitTimeout(), chEvtSend(), chEvtSendI(), EventMask(). - Removed deprecated configuration feature CH_USE_EXIT_EVENT and the related API chThdGetExitEventSource(). The feature can be reimplemented in user code as shown by the MinGW demo. - Removed deprecated macros: WorkingArea(), UserStackSize(), StackAlign(). - Added usage note into the readme of the MinGW demo. - Added usage notes for programmers to the ARM7 port documentation about interrupt handlers. - Port-specific settings added to the documentation. - Added source browser to the documentation. - Fixes and improvements through the documentation. *** 0.8.3 *** - NEW: Introduced new API chThdSleepS() as a macro, no real changes in the kernel code. - FIX: The MinGW simulated demo now works again after breaking in 0.8.2 because the changes to the macro names. - FIX: Adjusted the test suite stack sizes for the MinGW simulated demo, now the demo passes all the tests. - FIX: Added fflush(stdout) to the MinGW simulation code output in order to make the Eclipse console work correctly. - FIX: Renamed the MinGW demo main source from demo.c to main.c in order to follow the pattern of all the other demos. - FIX: Added debug switches to the MinGW simulated demo, not it is possible to debug the demo (and the kernel) inside Eclipse without a physical board. - Removed lots of old deprecated constructs from the MinGW simulated demo. There are still some, the demo will need some rework before version 1.0.0. - Updated the C++ wrapper with the latest APIs changes and fixed some bugs. - Small fixes to the documentation. *** 0.8.2 *** - FIX: Included the files that were missing from version 0.8.1 distribution. - FIX: Duplicated sections in the documentation removed. - FIX: Minor problem in Cortex-M3 and AVR ports when the kernel is compiled using G++. - NEW: Added chPoolAllocI() and chPoolFreeI() APIs in order to allow the use of memory pools from interrupt handlers and timer callbacks. - CHANGE: Simplified the code for chThdWait(), it is now both smaller and faster. Added an important usage note to the documentation of this API. - CHANGE: The macros WorkingArea(), UserStackSize() and StackAlign() are now deprecated and will be removed in version 1.0.0. Use the new equivalents WORKING_AREA(), THD_WA_SIZE() and STACK_ALIGN() instead. - CHANGE: Renamed the default idle thread function from _IdleThread() to _idle(). - Added to the LPC2148 and STM32 load scripts the options "ALIGN(16) SUBALIGN(16)" to the flash loading section in order to enforce the alignment for both the code and read only data. This is done in order to obtain more accurate timings from benchmarks, those families have 16 bytes prefetch buffers and are very sensitive to alignment changes. You can remove those options in order to save some flash space if accurate response time is not on top of your priorities, it mainly depends on your requirements. *** 0.8.1 *** - FIX: Fixed a regression in version 0.8.0, the configuration switch CH_USE_EVENTS_TIMEOUT was redefined as CH_USE_EVENT_TIMEOUT and this broke the code using events timeouts (the LPC2148 C++ demo). *** 0.8.0 *** - NEW: Added condvars mechanism on top of the mutexes subsystem. - NEW: Improved events subsystems, now it is also possible to use it just as "event flags" without have to use event handler callbacks. Some new APIs were introduced: * chEvtWaitOne() - Wait for a single event. * chEvtWaitAny() - Wait with OR condition. * chEvtWaitAll() - Wait with AND condition. * chEvtDispatch() - Invokes the event handlers associated to a mask. * chEvtPend() - Quickly self-pends some events. * chEvtRegisterMask() - Registers a set of flags on a single source. * EVENT_MASK() - Replaces the old EventMask() macro. All the "wait"-type APIs have a timeout-capable variant. - CHANGE: The old EventMask(), chEvtWait() and chEvtWaitTimeout() APIs are now deprecated and will be removed in version 1.0.0. - CHANGE: Modified chDbgAssert() to syntax check the condition even when the CH_USE_DEBUG is disabled, it produces no code but allows to check the optional code without have to compile twice. - FIX: Fixed a warning generated by the chEvtIsListening() macro. - Added new test cases to the test suite about condvars and the new events APIs. - Added a new benchmark to the test suite (timers set/reset performance). - Renamed the macro fifo_init() to queue_init() because it is used to init both FIFO queues and priority queues. - Fixes and improvements to the documentation. - Cleaned demo applications of old events code. *** 0.7.3 *** - FIX: Fixed a bug in chThdSleepUntil(), this API is no more a macro now. - NEW: New chThdSleepSeconds(), chThdSleepMilliseconds() and chThdSleepMicroseconds() utility macros. - CHANGE: Zero is no more a valid time specification for the chVTSetI() API. - CHANGE: Removed the files chsleep.c and sleep.h. - CHANGE: Renamed the files chdelta.c and delta.h to chvt.c and vt.h. All the system time related functions and macros are now there. - CHANGE: Renamed the structure DeltaList to VTList, it includes the system time counter too now. - CHANGE: Removed the CH_USE_SYSTEMTIME and CH_USE_VIRTUAL_TIMER configuration options in order to make the chconf.h file simpler. The related subsystems are almost always required and are now always included. - Small optimization to the MSP430 serial driver. - Improvements to the test code, now a failed assert terminates the test case. - Added dependency informations handling to the MSP430 demo Makefile. - Removed the performance spreadsheet (it was *very* old) and added a directory containing the test reports ./docs/reports. Each report shows the results from the latest test run on each target. - Small fixes to the documentation. *** 0.7.2 *** - NEW: Added a serial driver to the MSP430 port, the MSP430 port now has been tested on hardware and passes the test suite. - NEW: Added to the MSP demo program the option to run from the internal DCO or from an external xtal. The default is the internal DCO. - NEW: Added macros to convert from seconds, milliseconds and microseconds to system ticks. This improves application code portability among different ports. - CHANGE: Modified the test suite to use the new time conversion macros. - CHANGE: Modified the CM3 startup file in order to implement an early initialization phase: hwinit0, the late initialization phase is now named hwinit1. The demo now initializes the PLL before initializing the BSS and DATA segments, this greatly optimizes the system start up time. - NEW: Unified ARM7 startup file, it is shared by the LPC and SAM7 demo projects. The new startup file implements early and late initialization phases as described above for the CM3 startup file. The architecture specific vector tables are now encapsulated into the vectors.s files. - Modified the STM32 demo makefile to use the latest YAGARTO toolchain as default (arm-elf-gcc). - Documentation improvements, added collaboration diagrams and call graphs. Added a documentation-related readme under ./docs. *** 0.7.1 *** - NEW: New chThdInit() and chThdCreateStatic() APIs now replace the old chThdCreate() and chThdCreateFast() that are thus marked as deprecated. The new APIs use one less parameter and are faster. - NEW: New dynamic chThdCreateFromHeap() and chthdCreateFromMemoryPool() APIs. The dynamic APIs are only included if the CH_USE_DYNAMIC option is specified into the project configuration file. - NEW: Added an THREAD_EXT_EXIT macro in chconf.h to add finalization code to the chThdExit() API. - CHANGE: chThdCreateFast() is now a macro that uses chThdCreateStatic(). - CHANGE: chThdWait() now releases the memory allocated by chThdCreateFromHeap() and chthdCreateFromMemoryPool(). Threads created through the static APIs are not affected thus the behavior is backward compatible. - CHANGE: Modified the chThdResume() API to return the resumed thread pointer instead of void. This allowed few optimization into the threads creation code. - CHANGE: The chThdGetExitEventSource() API and the CH_USE_EXIT_EVENT configuration option and the are now deprecated. Use the THREAD_EXT_EXIT finalization macro in order to implement a similar functionality if needed. - FIX: The chThdCreate() had a regression in 0.7.0, the mode parameter was ignored. - FIX: Removed duplicated call to chHeapInit() into chSysInit(). - FIX: Fixed a syntax error in chheap.c triggered by the CH_USE_DEBUG option. - Added new test cases to the test suite for the new dynamic APIs. - Documentation fixes. *** 0.7.0 *** - NEW: Memory Heap Allocator functionality added. The allocator implements a first-fit strategy but there is an option that allow it to wrap the compiler provided malloc() that may implement a different strategy. The heap allocator is thread-safe and can use both a mutex or a semaphore as internal synchronization primitive. - NEW: Memory Pools functionality added, this mechanism allows constant-time allocation/freeing of constant-size objects. It can be used to dynamically allocate kernel objects like Semaphores, Mutexes, Threads etc fully in real time, of course it is also possible to manage application-defined objects. The pool allocator is thread-safe. It is worth remembering that the kernel is still entirely static, it does not use the allocation services internally, it is up to the application code to use the allocators in order to use dynamic system objects. Both the allocators can be disabled and removed from the memory image. - NEW: Added option macros in chconf.h to add custom fields and initialization code to the Thread structure. - FIX: Corrected the wrong definition of the chThdResumeI() macro. - FIX: The API chSemWaitTimeout() was missing in the documentation. - CHANGE: Modified the chMtxUnlock() and chMtxUnlockS() APIs to return the pointer to the released mutex instead of void. - CHANGE: Now the chThdResume() API asserts that the thread is in PRSUSPEND state rather than test it. - CHANGE: Removed the CH_USE_TERMINATE, CH_USE_SLEEP, CH_USE_SUSPEND and CH_USE_RESUME configuration options in order to make the chconf.h file simpler. The related functions are very small and almost always required. - CHANGE: The P_MSGBYPRIO thread option has been removed, now the threads always serve messages in priority order if the CH_USE_MESSAGES_PRIORITY configuration option is active. - Added new test cases to the test suite. *** 0.6.10 *** - FIX: Fixed a case-sensitiveness error in lpc214x_ssp.c, it affected only linux/unix users. - FIX: Fixed a regression introduced in version 0.6.9, the queues benchmark test case was missing from the tests list. - NEW: Added an option to the ARM7 ports, by specifying -DREENTRANT_LOCKS in the makefile options makes the chSysLock() and chSysUnlock() become reentrant. The code becomes a bit larger and slower, use it only if your application really needs to invoke system API under lock. - NEW: Added an option to the ARM7 and CM3 makefiles to strip any unused code and data from the binary file (the default is on). *** 0.6.9 *** - NEW: Added an option to exclude the support for the round robin scheduling, this can save some extra program space and makes the context switch a bit faster if the feature is not required. Threads at the same priority level are still supported when the feature is disabled but the scheduling among them becomes cooperative. - OPT: Improved reschedule time by reordering the sequence of operations, now during enqueuing the ready list contains one less element. This change also slightly improves the interrupt latency. - OPT: Optimization to the chSemReset(), reversed the order of dequeuing. - FIX: Fixed a bug in the chThdSetPriority() API. - FIX: Modified the structure names into nvic.h in order to not make them collide with external libraries. - Added a benchmark to the test suit that measures the mass reschedule performance. - Added a test_terminate_threads() function to the test framework. - Made the Cortex-M3 port preemption code more readable. - Added a ENABLE_WFI_IDLE option to the chcore.h file in the Cortex-M3 port, setting this option to 1 enables the kernel to enter a low power mode when executing the idle thread. Be careful however, this option can be not compatible with some JTAG probes, it is better to enable it only on final builds and not when debugging. *** 0.6.8 *** - FIX: Fixed a bug in the priority inheritance mechanism, the bug was only a problems when the CH_USE_MESSAGES_PRIORITY was enabled, this option is disabled by default in ChibiOS/RT so it should not affect any user. - CHANGE: The function chEvtSend() and chEvtSendI() are now renamed in chEvtBroadcast() and chEvtBroadcastI(), the old names are still available but are deprecated. - Made the default BASEPRI levels (CM3 port) configurable into chcore.h. - Many improvements to the documentation. - All the fixes and changes in this release were suggested/submitted by Leon Woestenberg (thank you). *** 0.6.7 *** - NEW: New chThdCreateFast() API, it is a simplified form of chThdCreate() that allows even faster threads creation. The new API does not support the "mode" and "arg" parameters (still available in the old API). - OPT: Removed an unrequired initialization and made other small optimizations to the chThdCreate(). - OPT: Improvements to the test framework, now a virtual timer is used instead of software loops into the benchmarks in order to have more stable results. - New benchmark added to the test suite. - Added the C++ wrapper entries to the documentation. - Fixed the documentation entry for the chThdCreate() API. - Removed redundant ifdefs from the ch.h header. *** 0.6.6 *** - NEW: Improved test suite, now the suite is divided in modules and the code is much easier to understand. The new framework simplifies the inclusion of new test cases and makes possible to verify the exact sequence and the timing of test events. - NEW: New API chSysInTimeWindow() that checks if the current system time is within the specified time window. - FIX: Mutex test #1 in the test suite corrected, it failed to... fail. - FIX: Fixed a problem in the STM32 port USART1 driver. - FIX: Fixed a problem in the MMC/SD driver in the LPC2148 demo. - Added the definitions for packed structures to the chtypes.h files. - Improvements to the makefiles, now each source group has its own .mk include file. Now it is no more required to rewrite everything in each makefile. *** 0.6.5 *** - NEW: Web server demo for the AT91SAM7X256, the demo integrates the uIP stack and its demo applications. - NEW: EMAC driver added to the AT91SAM7X port. - FIX: Small fix to the ARM7 startup files. It used a short jump in the reset vector and that could fail in some memory configurations. - Documentation improvements. *** 0.6.4 *** - NEW: MSP430 port, the port code compiles correctly but it is not tested yet. The port requires the MSPGCC toolchain. - NEW: Added a CH_ARCHITECTURE_xxx define to the various chcore.h files, it allows to write port-dependent code. - NEW: Added to the documentation the technical notes about the currently supported ports. - FIX: In the ARM7 and ARMCM3 ports chanced the bool_t base type from int8_t to int32_t, this produces a bit faster and smaller code. It is nowhere required the bool_t type to be one byte sized. - FIX: Small fixes to the template files, there were some leftovers of the old type names. - FIX: Modified the ARM demos makefiles in order to make them more compatible with GCC 4.3.0, it seems the new GCC assumes -mthumb-interworking and -mabi=apcs by default, at least the builds I tested did so, now the makefiles explicitly assert -mno-thumb-interworking and -mabi=apcs-gnu in order to produce better code. - Added an Ethernet driver for AT91SAM7X EMAC, not complete yet, it will be required by a uIP web server demo under ChibiOS/RT coming in some next release. *** 0.6.3 *** - NEW: ARM Cortex-M3 port completed. The demo program targets the STM32F103 chip from ST Microelectronics on an Olimex STM32-P103 board. - FIX: Fixed a minor error in ./ports/ARM7-LPC214x/vic.h, it should not affect anything. - FIX: Minor fix: in chThdCreate() a working area size equal to UserStackSize(0) was asserted as an error when in debug mode. It is now allowed. - FIX: Increased the stack size for the threads in the test suite to 128 bytes because THUMB/THUMB2 modes seem to use a lot more stack than ARM mode. *** 0.6.2 *** - NEW: Added C++ wrapper around the ChibiOS/RT core APIs, now it is possible to use the OS in a fully object oriented application. The wrapper offers classes that encapsulate threads, semaphores, mutexes, timers etc. Normal C APIs are still accessible from C++ code as usual. - NEW: Added a new LPC2148 demo using the new C++ wrapper, it is a good example of C++ used for an embedded application. The demo does not use RTTI nor standard libraries so the resulting code is very compact. - Enhanced the chSemSignalWait() API to return the wakeup message just like the other "Wait" semaphore functions do. - Fixed a minor problem in the ARM7 port, the extctx structure definition was missing one field, the effect was to allocate stacks 4 bytes shorter than the declared size. - Fixed a compile time error into the chThdSleepUntil() macro. - Fixes in various headers to make some macros compatible with both C and C++. - Fixed a regression in the LPC214x minimal demo that broke interrupt handling. - Some fixes to the doxygen documentation. - More work done on the ARM-CM3 port but it is still not complete. *** 0.6.1 *** - Removed some redundant checks from the scheduler code: improved threads flyback time, reduced interrupts service time. - Nice scheduler speed improvement obtained by removing the 2nd parameter to the chSchReadyI() API and manually assigning the message value only where is really needed (very few points in the code). - More space savings and speed improvements obtained by removing the -fno-strict-aliasing option from the makefiles, now the kernel compiles without any warning even without this option. - Removed the -falign-functions=16 option from the AT91SAM7X demo makefiles, the Atmel chip does not require it, the option is still present on the LPC21xx demos. This saves significant program space. - Started work on ARM Cortex-M3 architecture. The target chip is the STM32F103 on a Olimex STM32-P103 board. - Added a threads state diagram to the documentation. - Various fixes to the doxygen documentation. *** 0.6.0 *** - Code refactory, all the old sized-integer definitions like LONG32, UWORD16 etc are now replaced by the proper definitions provided by the compiler into stdint.h. - Code refactory, the previous system types style using a t_ in front of the name has been replaced with the standard trailing _t. The system now uses the size_t type defined into stddef.h. Some type names were modified in order to not match commonly used type names. - The above changes have an impact on some API prototypes but we can't help it, the changes were required because the type names were a concern for some users. - Implemented a serial driver in the AVR port. - Implemented a simple HD44780 LCD driver into the AVRmega128 demo. - Reworked the AVR AT90CAN128 port to share the common AVR code. - Modified the test suite to be compatible with 8 bit micros. - MSVC demo dropped, it is still possible to use the MinGW demo as simulator in Win32. - Fixed a minor error in sam7x_serial.h and lpc214x_serial.h. - The kernel is *unchanged* compared to version 0.5.3 except for the type names but the change is important enough to make this a recommended update. *** 0.5.5 *** - Added an AVRmega128 port. The previous AT90CANx port is still present but it will be redone after the AVRmega128 port is complete because it will share most of it. The demo is very simple, it will be expanded in next releases. - Reorganized the code of the two ARM7 ports, now all the common ARM7 code is in ./ports/ARM7. This will make maintenance and new ARM7 ports much much easier. - Simplified the directory structure under ./ports. - Added to the readme a section with our future plans/ideas. - The kernel is *unchanged* compared to version 0.5.3, just the new port and the new demo were added. *** 0.5.4 *** - Port for Atmel AT91SAM7X256 introduced, the port should be usable also on SAM7S and SAM7XC but no tests were performed. Other SAM7 processors should also be usable with limited changes. The demo currently just performs basic operations, will be enhanced in next ChibiOS/RT releases, see the demo readme.txt file. - Small fix to the thumb mode IRQ code on the LPC214x port, removed some extra code. - The kernel is *unchanged* compared to version 0.5.3, just the new port and the new demo were added. *** 0.5.3 *** - Removed the chMsgSendTimeout() API, it was conceptually flawed because, after sending a message, the sender *has* to wait for the answer or the next sender in queue would receive it instead (the messages server has no way to know that the sender is gone because a timeout). A workaround would make the messages subsystem much heavier and this is not acceptable. - Removed the test case for chMsgSendTimeout() from the test suite. - Space saved by reorganizing the timeout code into a single scheduler function chSchGoSleepTimeoutS(). - Space optimizations in the semaphores code. - The API chThdSleepUntil() become a macro saving some more code space. - Because all the above changes the kernel code (ARM) is over 700 bytes smaller. *** 0.5.2 *** - Fixed a small problem in the main header file ch.h. - Small reordering in the fields of the Thread structure in order to optimize the space when messages are not used. *** 0.5.1 *** - NEW: Priority enqueing for messages can be optionally enabled by specifying the P_MSGBYPRIO option when creating a message server thread. This change allows the implementation of a priority ceiling protocol into message servers threads. Threads serving messages by priority and threads serving messages in FIFO order can exist at the same time in the system. This feature can be enabled or disabled by toggling the option CH_USE_MESSAGES_PRIORITY into the chconf.h file (disabled by default, old behavior). Note: This option brings a small overhead when sending a message regardless if in FIFO or priority order, if you don't need priority ordering for your messages it is better to keep the feature disabled in chconf.h. - Added to the ARM demos load scripts the capability to load code in RAM instead flash, the function must be marked as: __attribute__((section(".ramtext"))) The option -mlong-calls should be specified in the makefile too or the function declared with the "long-call" attribute. - Fixed the MSVC demo project files. - Fixed some syntax incompatibilities between GCC and MSVC into chmtx.c. *** 0.5.0 *** - NEW: Mutexes, the new mechanism provides a complete implementation of the "priority inheritance" algorithm as a tool for work around the priority inversion problem. The Mutexes are not meant to replace the Semaphores that still are the best synchronization mechanism between interrupt handlers and high level code, something that Mutexes cannot do. Soon an article will be added to the wiki describing pro and cons of the various mechanisms and the correct use cases. - RT Semaphores subsystem removed, the Mutexes implements a better solution for the same problem. - Fixed a bug in the round robin scheduling mode, see the bug tracker for details and a fix for previous versions. - More performance improvements to the scheduler. The ready list insertion sequence is now reversed, it is scanned starting from the highest priority end. This has an important side effect into the chSchWakeupS() that makes most of the ready list insertions happen in constant time (extraction is done always in constant time). The worst case is always proportional to the number of threads in the ready list but the normal case is much more often constant than linear. See the new benchmarks added to the test suite. - Added mutexes test cases and new benchmarks to the test suite. - Modified the test suite in order to have each test case to have the same alignment enforced on functions. This is done to reduce MAM/Cache alignment effects on the measurement. - IRQ entry/exit code is now encapsulated into two new macros, see chcore.h for details. - All the asm code previously in chcore2.s is now inline asm code in chcore.c (ARM port), chcore2.s removed. - Moved all the board specific definitions/code into two new files: board.c and board.h. Moved all the files no more board-dependent under ports/ (ARM port). - Improved the kernel performance in THUMB mode by better exploiting MAM locality in some critical functions. The context switch benchmark shows 5% improved speed. *** 0.4.5 *** - Moved the serial IRQ handlers and VIC vectors initialization inside the serial drivers. Now the serial-related code is all inside the driver. - Moved all the other interrupt handlers from chcore2.s into chcore.c as inline asm code. The interrupt code now is faster because one less call level. - Fixed a minor problem in chSysHalt() now it disables FIQ too and makes sure to keep the processor in the state it had when it was halted. Note: This is not a kernel bug but something specific with the ARM port, the other ports are not affected. - Fixed the macro chThdResumeI(), it had a regression. *** 0.4.4 *** - Fixed a very important bug in the preemption ARM code, important enough to make this update *mandatory*. Note: This is not a kernel bug but something specific with the ARM port, the other ports are not affected. - Fixed a nasty bug in the pure THUMB mode threads trampoline code (chcore2.s, threadstart), it failed on THUMB threads returning with a "bx" instruction. The bug did not affect ARM mode or THUMB with interworking mode. Note: This is not a kernel bug but something specific with the ARM port, the other ports are not affected. - Fixed a bug in chIQGetTimeout(), interrupts were not re-enabled when exiting the function because a timeout. The problem affected that API only. - Fixed a potential problem in chSysInit(), it should not affect any past application. - Added a chDbgAssert() API to the debug subsystem. - Cleaned up the kernel source code using chDbgAssert() instead of a lot of "#ifdef CH_USE_DEBUG", it is much more readable now. - Now the threads working area is filled with a 0x55 when in debug mode, this will make easier to track stack usage using a JTAG probe. - Added an I/O Queues benchmark to the test suite. - Removed the chSchTimerHandlerI() routine from chschd.c and moved it into chinit.c renaming it chSysTimerHandlerI() because it is not part of the scheduler. *** 0.4.3 *** - Size optimization in the events code, now the chEvtWait() reuses the chEvtWaitTimeout() code if it is enabled. - Size optimization in the semaphores code, now the chSemWaitTimeout() just invokes the chSemWaitTimeoutS() inside its system mutex zone. Same thing done with chSemWait() and chSemWaitS(). - Size optimization in the queues code. - Modified the return type of chSemWait() and chSemWaitS() from void to t_msg, this allows to understand if the semaphore was signaled or reset without have to access the Thread structure. - Added a threads create/exit/wait benchmark to the test suite, the system is capable of 81712 threads started/terminated per second on the reference LPC2148 board. The figure is inclusive of two context switch operations for each thread. - Minor improvement in the LPC214x serial driver, unneeded events were generated in some rare cases. - Fixed a chSysInit() documentation error. - Fixed a chEvtWaitTimeout() documentation error. - Added a new debug switch: CH_USE_TRACE, previously the trace functionality was associated to the CH_USE_DEBUG switch. *** 0.4.2 *** - Added a minimal ARM7-LPC demo, you can use this one as template in order to create your application. It is easier to add subsystems back to the small demo than remove stuff from the large one. - Introduced support for "pure" THUMB mode, it is activated when all the source files are compiled in THUMB mode, the option -mthumb-interworking is not used in this scenario and this greatly improves both code size and speed. It is recommended to either use ARM mode or THUMB mode and not mix them unless you know exactly what you are doing. Mixing modes is still supported anyway. - More optimizations in the scheduler, updated the performance spreadsheet. - Fixed a problem with the thread working area declarations, the alignment to 4 bytes boundary was not enforced. Now it is defined a new macro WorkingArea(name, length) that takes care of both the allocation and the alignment. Example: static WorkingArea(waThread1, 32); It is expanded as: ULONG32 waThread1[UserStackSpace(32) >> 2]; Now the demos use the new declaration style. - Fixed a small problem in sleep functions introduced in 0.4.1. *** 0.4.1 *** - Modified the initialization code in order to have a dedicated idle thread in the system, now the main() function behaves like a normal thread after executing chSysInit() and can use all the ChibiOS/RT APIs (it was required to run the idle loop in previous versions). Now it is also possible to use ChibiOS/RT with a single main() thread and just use it for the I/O capabilities, Virtual Timers and events. Now you don't have to use multiple threads if you don't really need to. - Added a spreadsheet in the documentation that describes the advantages and disadvantages of the various optimization options (both GCC options and ChibiOS/RT options), very interesting read IMO. - The GCC option -falign-functions=16 is now default in the Makefile, it is required because of the MAM unit into the LPC chips, without this option the code performance is less predictable and can change of some % points depending on how the code is aligned in the flash memory, unpredictability is bad for a RTOS. This option however increases the code size slightly because of the alignment gaps. - Fine tuning in the scheduler code for improved performance, deeper inlining and other small changes, about 5% better scheduler performance. - Increased the default system-mode stack size from 128 to 256 bytes because some optimizations and the THUMB mode seem to eat more stack space. - Included a Makefile in the LPC2148 demo that builds in THUMB mode. - Const-ified a parameter in the chEvtWait() and chEvtWaitTimeout() APIs. - Removed the CPU register clearing on thread start, it was not really useful, it is better to maximize performance instead. - Cleaned up the ARM port code. Now it is easier to understand. - Cleaned up the LPC2148 demo in main.c, it is now well documented and explains everything, I assumed too much stuff to be "obvious". *** 0.4.0 *** - NEW, added a benchmark functionality to the test suite. The benchmark measures the kernel throughput as messages per second and context switches per second. The benchmark will be useful for fine tuning the compiler options and the kernel itself. - NEW, implemented a debug subsystem, it supports debug messages and a context switch circular trace buffer. The debug code can be enabled/disabled by using the CH_USE_DEBUG in chconf.h. The trace buffer is meant to be fetched and decoded by an external tool (coming soon, it can be accessed using JTAG in the meanwhile). - Added new API chThdGetPriority() as a macro. - Implemented panic messages when CH_USE_DEBUG is enabled. - Added a thread identifier field to the Thread structure, it is used only for debug. - Global variable stime modified as volatile. - API chSysGetTime() reimplemented as a macro. - Fixed a regression with the CH_CURRP_REGISTER_CACHE option. - Fixed a problem in the LPC2148 interrupt handling code, a spurious interrupts fix recommended on the NXP data sheet proved to be a very bad idea and not about real spurious interrupts also... - Fixed an harmless warning message in buzzer.c. *** 0.3.6 *** - Added SSP (SPI1) and ext.interrupts definitions to the lpc214x.h file. - Added SSP driver for the LPC2148. - Added experimental MMC/SD block driver to the LPC2148 demo in order to support file systems. The driver features also events generation on card insert/remove, hot plugging supported. - Added missing chThdSuspend() declaration in threads.h. *** 0.3.5 *** - Space optimization in events code. - Changed the behavior of chEvtWaitTimeout() when the timeout parameter is set to zero, now it is consistent with all the other syscalls that have a timeout option. - Reorganized all the kernel inline definitions into a single file (inline.h). - Fixed a minor problem in the interrupt initialization code for the LPC214x demo, regrouped the VIC-specific code into vic.c/vic.h. - Fixed a bug into the LPC2148 serial driver (limited to the serial port 2). - Implemented HW transmit FIFO preloading in the LPC2148 serial driver in order to minimize the number of interrupts generated, it is possible to disable the feature and return to the old code which is a bit smaller, see the configuration parameters in ./ARM7-LPC214x/GCC/lpc214x_serial.h. - Some more work done on the AVR port, it is almost complete but not tested yet because my JTAG probe broke... *** 0.3.4 *** - Fixed a problem in chVTSetI(). - New API, chVTIsArmedI(), it is a macro in delta.h. - New API, chThdResumeI(), it is a macro in threads.h. This function is just an alias for chSchReadyI() but makes the code more readable. - New API, chThdSuspend(). New switch CH_USE_SUSPEND added to chconf.h. *** 0.3.3 *** - Modified the chVTSetI(), now for the "time" parameter can have value zero with meaning "infinite". This allows all the APIs with timeout parameters to be invoked with no timeout. - Fixes in the documentation. - Renamed some APIs in the "Sch" group to have an S suffix instead of I. *** 0.3.2 *** - Modified the chSysInit() to give the idle thread absolute priority, the priority is then lowered to the minimum value into the chSysPause(). This is done in order to ensure that the initializations performed into the main() procedure are finished before any thread starts. - Added chThdSetPriority() new API. - Added a generic events generator timer module to the library code. - Modified the ARM7-LPC214x-GCC demo to show the use of the event timer. - Added the "#ifdef __cplusplus" stuff to the header files. - Removed an obsolete definition in ./src/templates/chtypes.h. *** 0.3.1 *** - Test program added to the demos. Telnet the MinGW and MSVS demos and type "test" at the "ch>" prompt. On the LPC214x demo the test is activated by pressing both the board buttons. The test performs tests on the ChibiOS/RT functionalities. The test code is also a good example of APIs usage and ChibiOS/RT behavior. - Fixed bug in chEvtWaitTimeout(), the timeout code performed an useless dequeue operation. - Fixed a bug in chSemWaitTimeoutS() and chSemWaitTimeout(), the semaphore counter was not atomically updated on a timeout condition. - Fixed bug on RT semaphores, the priority queuing was broken. - Fixed a bug in the MinGW demo, the chThdExit() code was not correctly reported to the thread waiting in chThdWait(). - Fixed a function declaration in semaphores.h. - Lists code moved into chlists.c from various other places optimized and reorganized. - The list of the threads waiting in chThdWait() is now a single link list, this saves some space. - Cleaned the template files code, the files contained some obsolete declarations. - Code optimization in chSemWaitTimeoutS(), chSemWaitTimeout() and chSemSignalWait(). - Code optimization in chEvtSend(). - Code optimization in chVTDoTickI(). - Added a Semaphore pointer to the Thread structure, this allows to know on which semaphore a thread is waiting on. It takes no space because it is located in the union inside the Thread structure. This also allowed a minor optimization inside chSemWaitTimeout() and chSemWaitTimeoutS(). - Changed the priority type to unsigned in order to make it compatible with a byte value, this is very important for 8 bits architectures. - Modified the MinGW and MSVS demos to use 1ms ticks instead of 10ms as before. *** 0.3.0 *** - ChibiOS/RT goes beta. - Diet for the threads code, some simple APIs become macros. - Thread Local Storage implemented as a single API: chThdLS(). The API simply returns a pointer into the thread working area, see the documentation on the web site. - Moved some documentation and images from the web site into the Doxygen generated HTMLs. *** 0.2.1 *** - Optimizations in the RT semaphores subsystem. The support for this subsystem should still be considered experimental and further changes may happen in future versions. - Bug fix in the virtual timers handling code, now the timers can be re-armed from within the callback code in order to create periodic virtual timers. - Modified the t_prio type in the demos to be 32bits wide instead of 16bits, this results in a better code in critical sections of the kernel. *** 0.2.0 *** - Introduced support for ARM in thumb mode. - Optimized context switching when thumb-interworking is not required, one less instruction. - Minor fixes to the ARM demo. *** 0.1.1 *** - Some fixes into the documentation - Renamed the makefiles to Makefile, upper case M. *** 0.1.0 *** - First alpha release