CMSIS-RTOS RTX  Version 4.78
CMSIS-RTOS RTX: Real-Time Operating System for Cortex-M processor-based devices
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Revision History of CMSIS-RTOS RTX
Version Description
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.