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 <span id="projectnumber">Version 2.1.3</span>
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<div id="projectbrief">Real-Time Operating System: API and RTX Reference Implementation</div>
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<div class="title">Revision History </div> </div>
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<div class="textblock"><h1><a class="anchor" id="GenRTOS2Rev"></a>
CMSIS-RTOS API Version 2</h1>
<table class="cmtable" summary="Revision History">
<tr>
<th>Version </th><th>Description </th></tr>
<tr>
<td>V2.1.3 </td><td>Additional functions allowed to be called from Interrupt Service Routines:<ul>
<li><a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#ga8df03548e89fbc56402a5cd584a505da">osThreadGetId</a> </li>
</ul>
</td></tr>
<tr>
<td>V2.1.2 </td><td>Additional functions allowed to be called from Interrupt Service Routines:<ul>
<li><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga6f7764e7250c5c5364c00c45a5d1d199">osKernelGetInfo</a>, <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga48b69b81012fce051f639be288b243ba">osKernelGetState</a> </li>
</ul>
</td></tr>
<tr>
<td>V2.1.1 </td><td><p class="starttd">Additional functions allowed to be called from Interrupt Service Routines:</p>
<ul>
<li><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga84bcdbf2fb76b10c8df4e439f0c7e11b">osKernelGetTickCount</a>, <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga7a8d7bd927eaaa58999f91d7d6310cee">osKernelGetTickFreq</a></li>
</ul>
<p class="endtd">Changed Kernel Tick type to uint32_t:</p>
<ul>
<li>updated: <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga84bcdbf2fb76b10c8df4e439f0c7e11b">osKernelGetTickCount</a>, <a class="el" href="group__CMSIS__RTOS__Wait.html#ga3c807924c2d6d43bc2ffb49da3f7f3a1">osDelayUntil</a> </li>
</ul>
</td></tr>
<tr>
<td>V2.1.0 </td><td><p class="starttd">Support for critical and uncritical sections (nesting safe):</p>
<ul>
<li>updated: <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a>, <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gaf401728b4657456198c33fe75f8d6720">osKernelUnlock</a></li>
<li>added: <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae7d0a71b9586cbbb49fcbdf6a04f0289">osKernelRestoreLock</a></li>
</ul>
<p class="endtd">Updated <a class="el" href="group__CMSIS__RTOS__ThreadFlagsMgmt.html">Thread Flags</a> and <a class="el" href="group__CMSIS__RTOS__EventFlags.html">Event Flags</a>:</p>
<ul>
<li>changed flags parameter and return type from int32_t to uint32_t </li>
</ul>
</td></tr>
<tr>
<td>V2.0.0 </td><td>New API Version 2.0 available.<ul>
<li>See <a class="el" href="rtos_api2.html">CMSIS-RTOS C API v2</a> for a detailed function reference.</li>
<li>See <a class="el" href="os2Migration.html">Migration from API v1 to API v2</a> for details on the migration process from API Version 1. </li>
</ul>
</td></tr>
<tr>
<td>V1.02 - only documentation changes </td><td>Added: Overview of the <a class="el" href="rtosValidation.html">CMSIS-RTOS Validation</a> Software Pack.<br/>
Clarified: Behavior of <a class="el" href="theory_of_operation.html#CMSIS_RTOS_TimeOutValue">Timeout Value</a>. </td></tr>
<tr>
<td>V1.02 </td><td>Added: New control functions for short timeouts in microsecond resolution <b>osKernelSysTick</b>, <b>osKernelSysTickFrequency</b>, <b>osKernelSysTickMicroSec</b>.<br/>
Removed: osSignalGet. fv </td></tr>
<tr>
<td>V1.01 </td><td>Added capabilities for C++, kernel initialization and object deletion.<br/>
Prepared for C++ class interface. In this context to <em>const</em> attribute has been moved from osXxxxDef_t typedefs to the osXxxxDef macros.<br/>
Added: <a class="el" href="group__CMSIS__RTOS__TimerMgmt.html#gad0001dd74721ab461789324806db2453">osTimerDelete</a>, <a class="el" href="group__CMSIS__RTOS__MutexMgmt.html#gabee73ad227ba4587d3db12ef9bd582bc">osMutexDelete</a>, <a class="el" href="group__CMSIS__RTOS__SemaphoreMgmt.html#ga81258ce9c67fa89f07cc49d2e136cd88">osSemaphoreDelete</a>.<br/>
Added: <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae818f6611d25ba3140bede410a52d659">osKernelInitialize</a> that prepares the kernel for object creation.<br/>
</td></tr>
<tr>
<td>V1.00 </td><td>First official Release.<br/>
Added: <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga9ae2cc00f0d89d7b6a307bba942b5221">osKernelStart</a>; starting 'main' as a thread is now an optional feature.<br/>
Semaphores have now the standard behavior.<br/>
<b>osTimerCreate</b> does no longer start the timer. Added: <a class="el" href="group__CMSIS__RTOS__TimerMgmt.html#gab6ee2859ea657641b7adfac599b8121d">osTimerStart</a> (replaces osTimerRestart).<br/>
Changed: osThreadPass is renamed to <a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#gad01c7ec26535b1de6b018bb9466720e2">osThreadYield</a>. </td></tr>
<tr>
<td>V0.02 </td><td>Preview Release. </td></tr>
</table>
<h1><a class="anchor" id="RTX5RevisionHistory"></a>
CMSIS-RTOS RTX Version 5</h1>
<table class="cmtable" summary="Revision History">
<tr>
<th>Version </th><th>Description </th></tr>
<tr>
<td>V5.5.1 </td><td><ul>
<li>Fixed osMutexRelease issue (thread owning multiple mutexes).</li>
<li>Improved osThreadJoin robustness (user programing errors). </li>
</ul>
</td></tr>
<tr>
<td>V5.5.0 </td><td><ul>
<li>Updated and enhanced generated events (reorganized components).</li>
<li>Updated configuration (Event Recorder).</li>
<li>Updated Component Viewer (improved performance).</li>
<li>Minor code optimizations. </li>
</ul>
</td></tr>
<tr>
<td>V5.4.0 </td><td><ul>
<li>Based on CMSIS-RTOS API V2.1.3.</li>
<li>Added support for Event Recorder initialization and filter setup.</li>
<li>Added support to use RTOS as Event Recorder Time Stamp source.</li>
<li>Fixed osDelayUntil longest delay (limited to 2^31-1).</li>
<li>Fixed optimization issue when using GCC optimization level 3.</li>
<li>Fixed osMemoryPoolAlloc to avoid potential race condition.</li>
<li>Restructured exception handling for Cortex-A devices.</li>
<li>Minor code optimizations (removed unnecessary checks). </li>
</ul>
</td></tr>
<tr>
<td>V5.3.0 </td><td><ul>
<li>Added Object Memory usage counters.</li>
<li>Added support for additional external configuration file.</li>
<li>Added user configurable names for system threads (Idle and Timer).</li>
<li>Added support for OS sections when using ARMCC5.</li>
<li>Added callback for MPU integration (experimental)</li>
<li>Increased default thread stack sizes to 256 bytes.</li>
<li>Fixed stack context display for running thread in SCVD.</li>
<li>Enhanced MISRA Compliance. </li>
</ul>
</td></tr>
<tr>
<td>V5.2.3 </td><td><ul>
<li>Based on CMSIS-RTOS API V2.1.2.</li>
<li>Added TrustZone Module Identifier configuration for Idle and Timer Thread.</li>
<li>Moved SVC/PendSV handler priority setup from osKernelInitialize to osKernelStart (User Priority Grouping can be updated after osKernelInitialize but before osKernelStart).</li>
<li>Corrected SysTick and PendSV handlers for ARMv8-M Baseline.</li>
<li>Corrected memory allocation for stack and data when "Object specific Memory allocation" configuration is used.</li>
<li>Added support for ARMv8-M IAR compiler. </li>
</ul>
</td></tr>
<tr>
<td>V5.2.2 </td><td><ul>
<li>Corrected IRQ and SVC exception handlers for Cortex-A. </li>
</ul>
</td></tr>
<tr>
<td>V5.2.1 </td><td><ul>
<li>Corrected SysTick and SVC Interrupt Priority for Cortex-M. </li>
</ul>
</td></tr>
<tr>
<td>V5.2.0 </td><td><ul>
<li>Based on CMSIS-RTOS API V2.1.1.</li>
<li>Added support for for Cortex-A.</li>
<li>Using OS Tick API for RTX Kernel Timer Tick.</li>
<li>Fixed potential corruption of terminated threads list.</li>
<li>Corrected MessageQueue to use actual message length (before padding).</li>
<li>Corrected parameters for ThreadEnumerate and MessageQueueInserted events.</li>
<li>Timer Thread creation moved to osKernelStart. </li>
</ul>
</td></tr>
<tr>
<td>V5.1.0 </td><td><ul>
<li>Based on CMSIS-RTOS API V2.1.0.</li>
<li>Added support for Event recording.</li>
<li>Added support for IAR compiler.</li>
<li>Updated configuration files: RTX_Config.h for the configuration settings and RTX_config.c for implementing the <a class="el" href="group__rtx5__specific.html">RTX v5 Specific API</a>.</li>
<li>osRtx name-space for RTX specific symbols. </li>
</ul>
</td></tr>
<tr>
<td>V5.0.0 </td><td>Initial release compliant to CMSIS-RTOS2.<br/>
</td></tr>
</table>
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