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+CMSIS-RTOS API

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Version	Description
V1.03 - only documentation changes	Incorporated documentation for reference implementation CMSIS-RTOS RTX.
V1.02 - only documentation changes	Added: Overview of the CMSIS-RTOS Validation Software Pack. + Clarified: Behaviour of Timout Value.
V1.02	Added: New control functions for short timeouts in microsecond resolution osKernelSysTick, osKernelSysTickFrequency, osKernelSysTickMicroSec. + Removed: osSignalGet.
V1.01	Added capabilities for C++, kernel initialization and object deletion. + Prepared for C++ class interface. In this context to const attribute has been moved from osXxxxDef_t typedefs to the osXxxxDef macros. + Added: osTimerDelete, osMutexDelete, osSemaphoreDelete. + Added: osKernelInitialize that prepares the Kernel for object creation. +
V1.00	First official Release. + Added: osKernelStart; starting 'main' as a thread is now an optional feature. + Semaphores have now the standard behavior. + osTimerCreate does no longer start the timer. Added: osTimerStart (replaces osTimerRestart). + Changed: osThreadPass is renamed to osThreadYield.
V0.02	Preview Release.

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+CMSIS-RTOS RTX

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Version	Description
V4.82	Corrected: Recursive Mutex 16-bit lock counter is now checked to not overflow. +
V4.81	Added provisions for Arm Compiler 6. + Corrected: Message Queue behavior when osMessagePut timed out due to full queue and osMessageGet was called from ISR. +
V4.80	Restored time delay parameter 'millisec' old behavior (before V4.79) for software compatibility. + Corrected: implicit mutex release when mutex owner thread is terminated. +
V4.79	Corrected: time delay parameter ‘millisec’ in all functions (osDelay, osSignalWait, …) is now treated as lower bound – wait for at least time given (before it could have been up to 1ms less). + Corrected: Lazy Context switching for Cortex-M4 with FPU could lead to a crash when thread which used FPU was terminated. + Corrected: osMailCAlloc only cleared the allocated memory block if it was available without waiting. + Corrected: osThreadCreate function returns NULL when trying to create more concurrent threads than defined in the configuration. + Improved source code MISRA compliance. +
V4.78	Corrected: osTimerStart function accepts full 32-bit range for time delay value in milisec. + Added: User Timer Callback Queue overflow reported through os_error(OS_ERROR_TIMER_OVF). +
V4.77	Added: Stack usage watermark. +
V4.76	Optimized Service calls in GCC libraries. + Corrected: Stack/Heap regions can be used with scatter loading. +
V4.75	Corrected: Service calls for Cortex-M4 with Floating Point for GCC. + Corrected: osSignalClear returns 0x80000000 when called from interrupt service routines. + Corrected: C standard library memory functions (malloc, free, ...) can be called between calls to osKernelInitialize and osKernelStart. + Corrected: Interrupt Priority Group can be configured between calls to osKernelInitialize and osKernelStart. +
V4.74	Corrected: osKernelInitialize and osKernelStart when called from main which is already a thread. +
V4.73	Corrected: mutex priority inversion when thread owns more than one mutex. + Added: RTX extensions os_suspend and os_resume. + Added: RTX os_error template.
V4.72	Corrected: object initialization when defined inside function (allocated on stack and not as static memory).
V4.71	Corrected: osMailFree behaviour when osMailAlloc timed out.
V4.70	Added: New control functions for short timeouts in microsecond resolution osKernelSysTick, osKernelSysTickFrequency, osKernelSysTickMicroSec. + Removed: osSignalGet.
V4.61	Enhanced: osTimerCreate can now be called after osKernelInitialize (before only after osKernelStart). + Corrected: Initialization of alternative kernel timer for Cortex-M0/M0+/M1 (when SysTick timer is not used). + Corrected: Message/Mail Queue behavior when timeout expires.
V4.51	Corrected: problem with osKernelInitialize when after the call high priority threads are defined.
V4.50	Based on CMSIS-RTOS API Version 1.01 and the classic RTX V4.50 Kernel. + Added: osTimerDelete, osMutexDelete, osSemaphoreDelete. + Added: osKernelInitialize that prepares the Kernel for object creation. + Added: support for Low Power Cortex-M applications based on new configuration functions: os_suspend, os_resume. + Added: support for peripheral timer to be used as OS tick timer instead of Core SysTick timer. + Corrected: stack checking did not work for os_tsk_delete_self function Preview Release.
V4.20	Initial CMSIS-RTOS adaption of the RTX Kernel.

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