begriffs open source - cmsis/blob - main/RTOS2/html/group__CMSIS__RTOS__KernelCtrl.html

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  46    <div id="projectname">CMSIS-RTOS2
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  55    <div id="projectbrief">Real-Time Operating System API</div>
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 126 <div class="header">
 127   <div class="summary">
 128 <a href="#nested-classes">Data Structures</a> &#124;
 129 <a href="#enum-members">Enumerations</a> &#124;
 130 <a href="#func-members">Functions</a>  </div>
 131   <div class="headertitle"><div class="title">Kernel Information and Control<div class="ingroups"><a class="el" href="group__CMSIS__RTOS.html">CMSIS-RTOS API v2</a></div></div></div>
 132 </div><!--header-->
 133 <div class="contents">
 134
 135 <p>Provides version/system information and starts/controls the RTOS Kernel.
 136 <a href="#details">More...</a></p>
 137 <table class="memberdecls">
 138 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="nested-classes" name="nested-classes"></a>
 139 Data Structures</h2></td></tr>
 140 <tr class="memitem:structosVersion__t"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#structosVersion__t">osVersion_t</a></td></tr>
 141 <tr class="memdesc:structosVersion__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">Version information.  <a href="group__CMSIS__RTOS__KernelCtrl.html#structosVersion__t">More...</a><br /></td></tr>
 142 <tr class="separator:structosVersion__t"><td class="memSeparator" colspan="2">&#160;</td></tr>
 143 </table><table class="memberdecls">
 144 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="enum-members" name="enum-members"></a>
 145 Enumerations</h2></td></tr>
 146 <tr class="memitem:ga08326469274b668140ca934b168a5ad4"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4">osKernelState_t</a> { <br />
 147 &#160;&#160;<a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4a2ad3e5912db47b497529d036c89e7995">osKernelInactive</a> = 0
 148 , <br />
 149 &#160;&#160;<a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4a0596c6e14113447604753656417c9a24">osKernelReady</a> = 1
 150 , <br />
 151 &#160;&#160;<a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4a8e0b699fbe1c8bb66fefadd5911cb6ce">osKernelRunning</a> = 2
 152 , <br />
 153 &#160;&#160;<a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4a2fe382ad5ebab2257b35740414b28b01">osKernelLocked</a> = 3
 154 , <br />
 155 &#160;&#160;<a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4ad364464ad84d63b1413a9ac8a962390c">osKernelSuspended</a> = 4
 156 , <br />
 157 &#160;&#160;<a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4a0545c92c18ce8e6b24e82a0d694a0b4a">osKernelError</a> = -1
 158 , <br />
 159 &#160;&#160;<a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4ab0a47576defa29396a649d9173d4bc4b">osKernelReserved</a> = 0x7FFFFFFF
 160 <br />
 161  }</td></tr>
 162 <tr class="memdesc:ga08326469274b668140ca934b168a5ad4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Kernel state.  <a href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4">More...</a><br /></td></tr>
 163 <tr class="separator:ga08326469274b668140ca934b168a5ad4"><td class="memSeparator" colspan="2">&#160;</td></tr>
 164 </table><table class="memberdecls">
 165 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
 166 Functions</h2></td></tr>
 167 <tr class="memitem:gae818f6611d25ba3140bede410a52d659"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae818f6611d25ba3140bede410a52d659">osKernelInitialize</a> (void)</td></tr>
 168 <tr class="memdesc:gae818f6611d25ba3140bede410a52d659"><td class="mdescLeft">&#160;</td><td class="mdescRight">Initialize the RTOS Kernel.  <br /></td></tr>
 169 <tr class="separator:gae818f6611d25ba3140bede410a52d659"><td class="memSeparator" colspan="2">&#160;</td></tr>
 170 <tr class="memitem:ga6f7764e7250c5c5364c00c45a5d1d199"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga6f7764e7250c5c5364c00c45a5d1d199">osKernelGetInfo</a> (<a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#structosVersion__t">osVersion_t</a> *version, char *id_buf, uint32_t id_size)</td></tr>
 171 <tr class="memdesc:ga6f7764e7250c5c5364c00c45a5d1d199"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get RTOS Kernel Information.  <br /></td></tr>
 172 <tr class="separator:ga6f7764e7250c5c5364c00c45a5d1d199"><td class="memSeparator" colspan="2">&#160;</td></tr>
 173 <tr class="memitem:ga48b69b81012fce051f639be288b243ba"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4">osKernelState_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga48b69b81012fce051f639be288b243ba">osKernelGetState</a> (void)</td></tr>
 174 <tr class="memdesc:ga48b69b81012fce051f639be288b243ba"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the current RTOS Kernel state.  <br /></td></tr>
 175 <tr class="separator:ga48b69b81012fce051f639be288b243ba"><td class="memSeparator" colspan="2">&#160;</td></tr>
 176 <tr class="memitem:ga9ae2cc00f0d89d7b6a307bba942b5221"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga9ae2cc00f0d89d7b6a307bba942b5221">osKernelStart</a> (void)</td></tr>
 177 <tr class="memdesc:ga9ae2cc00f0d89d7b6a307bba942b5221"><td class="mdescLeft">&#160;</td><td class="mdescRight">Start the RTOS Kernel scheduler.  <br /></td></tr>
 178 <tr class="separator:ga9ae2cc00f0d89d7b6a307bba942b5221"><td class="memSeparator" colspan="2">&#160;</td></tr>
 179 <tr class="memitem:ga948609ee930d9b38336b9e1c2a4dfe12"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a> (void)</td></tr>
 180 <tr class="memdesc:ga948609ee930d9b38336b9e1c2a4dfe12"><td class="mdescLeft">&#160;</td><td class="mdescRight">Lock the RTOS Kernel scheduler.  <br /></td></tr>
 181 <tr class="separator:ga948609ee930d9b38336b9e1c2a4dfe12"><td class="memSeparator" colspan="2">&#160;</td></tr>
 182 <tr class="memitem:gaf401728b4657456198c33fe75f8d6720"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gaf401728b4657456198c33fe75f8d6720">osKernelUnlock</a> (void)</td></tr>
 183 <tr class="memdesc:gaf401728b4657456198c33fe75f8d6720"><td class="mdescLeft">&#160;</td><td class="mdescRight">Unlock the RTOS Kernel scheduler.  <br /></td></tr>
 184 <tr class="separator:gaf401728b4657456198c33fe75f8d6720"><td class="memSeparator" colspan="2">&#160;</td></tr>
 185 <tr class="memitem:gae7d0a71b9586cbbb49fcbdf6a04f0289"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae7d0a71b9586cbbb49fcbdf6a04f0289">osKernelRestoreLock</a> (int32_t lock)</td></tr>
 186 <tr class="memdesc:gae7d0a71b9586cbbb49fcbdf6a04f0289"><td class="mdescLeft">&#160;</td><td class="mdescRight">Restore the RTOS Kernel scheduler lock state.  <br /></td></tr>
 187 <tr class="separator:gae7d0a71b9586cbbb49fcbdf6a04f0289"><td class="memSeparator" colspan="2">&#160;</td></tr>
 188 <tr class="memitem:gae26683e1606ec633354a2876c68f0c1f"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae26683e1606ec633354a2876c68f0c1f">osKernelSuspend</a> (void)</td></tr>
 189 <tr class="memdesc:gae26683e1606ec633354a2876c68f0c1f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Suspend the RTOS Kernel scheduler.  <br /></td></tr>
 190 <tr class="separator:gae26683e1606ec633354a2876c68f0c1f"><td class="memSeparator" colspan="2">&#160;</td></tr>
 191 <tr class="memitem:ga8c4b4d7ed34cab73c001665d9176aced"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga8c4b4d7ed34cab73c001665d9176aced">osKernelResume</a> (uint32_t sleep_ticks)</td></tr>
 192 <tr class="memdesc:ga8c4b4d7ed34cab73c001665d9176aced"><td class="mdescLeft">&#160;</td><td class="mdescRight">Resume the RTOS Kernel scheduler.  <br /></td></tr>
 193 <tr class="separator:ga8c4b4d7ed34cab73c001665d9176aced"><td class="memSeparator" colspan="2">&#160;</td></tr>
 194 <tr class="memitem:ga84bcdbf2fb76b10c8df4e439f0c7e11b"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga84bcdbf2fb76b10c8df4e439f0c7e11b">osKernelGetTickCount</a> (void)</td></tr>
 195 <tr class="memdesc:ga84bcdbf2fb76b10c8df4e439f0c7e11b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the RTOS kernel tick count.  <br /></td></tr>
 196 <tr class="separator:ga84bcdbf2fb76b10c8df4e439f0c7e11b"><td class="memSeparator" colspan="2">&#160;</td></tr>
 197 <tr class="memitem:ga7a8d7bd927eaaa58999f91d7d6310cee"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga7a8d7bd927eaaa58999f91d7d6310cee">osKernelGetTickFreq</a> (void)</td></tr>
 198 <tr class="memdesc:ga7a8d7bd927eaaa58999f91d7d6310cee"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the RTOS kernel tick frequency.  <br /></td></tr>
 199 <tr class="separator:ga7a8d7bd927eaaa58999f91d7d6310cee"><td class="memSeparator" colspan="2">&#160;</td></tr>
 200 <tr class="memitem:gae0fcaff6cecfb4013bb556c87afcd7d2"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae0fcaff6cecfb4013bb556c87afcd7d2">osKernelGetSysTimerCount</a> (void)</td></tr>
 201 <tr class="memdesc:gae0fcaff6cecfb4013bb556c87afcd7d2"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the RTOS kernel system timer count.  <br /></td></tr>
 202 <tr class="separator:gae0fcaff6cecfb4013bb556c87afcd7d2"><td class="memSeparator" colspan="2">&#160;</td></tr>
 203 <tr class="memitem:ga4d69215a93220f72be3684cad582f16a"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga4d69215a93220f72be3684cad582f16a">osKernelGetSysTimerFreq</a> (void)</td></tr>
 204 <tr class="memdesc:ga4d69215a93220f72be3684cad582f16a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the RTOS kernel system timer frequency.  <br /></td></tr>
 205 <tr class="separator:ga4d69215a93220f72be3684cad582f16a"><td class="memSeparator" colspan="2">&#160;</td></tr>
 206 <tr class="memitem:gac7e3b012c15c55bda68e0dd96ad9cd72"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gac7e3b012c15c55bda68e0dd96ad9cd72">osKernelProtect</a> (uint32_t safety_class)</td></tr>
 207 <tr class="memdesc:gac7e3b012c15c55bda68e0dd96ad9cd72"><td class="mdescLeft">&#160;</td><td class="mdescRight">Protect the RTOS Kernel scheduler access.  <br /></td></tr>
 208 <tr class="separator:gac7e3b012c15c55bda68e0dd96ad9cd72"><td class="memSeparator" colspan="2">&#160;</td></tr>
 209 <tr class="memitem:ga2065364d1bc805a40e749430377df1e1"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga2065364d1bc805a40e749430377df1e1">osKernelDestroyClass</a> (uint32_t safety_class, uint32_t mode)</td></tr>
 210 <tr class="memdesc:ga2065364d1bc805a40e749430377df1e1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Destroy objects for specified safety classes.  <br /></td></tr>
 211 <tr class="separator:ga2065364d1bc805a40e749430377df1e1"><td class="memSeparator" colspan="2">&#160;</td></tr>
 212 <tr class="memitem:ga91b400b21a9093f7751fc45613c12110"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga91b400b21a9093f7751fc45613c12110">osFaultResume</a> (void)</td></tr>
 213 <tr class="memdesc:ga91b400b21a9093f7751fc45613c12110"><td class="mdescLeft">&#160;</td><td class="mdescRight">Resume normal operation when exiting exception faults.  <br /></td></tr>
 214 <tr class="separator:ga91b400b21a9093f7751fc45613c12110"><td class="memSeparator" colspan="2">&#160;</td></tr>
 215 </table>
 216 <a name="details" id="details"></a><h2 class="groupheader">Description</h2>
 217 <p>The kernel Information and Control function group allows to:</p><ul>
 218 <li>obtain information about the system and the underlying kernel.</li>
 219 <li>obtain version information about the CMSIS-RTOS API.</li>
 220 <li>initialize of the RTOS kernel for creating objects.</li>
 221 <li>start the RTOS kernel and thread switching.</li>
 222 <li>check the execution status of the RTOS kernel.</li>
 223 </ul>
 224 <dl class="section note"><dt>Note</dt><dd>The kernel information and control functions cannot be called from Interrupt Service Routines. </dd>
 225 <dd>
 226 The kernel initialization for RTX5 is documented in SystemStartup.</dd></dl>
 227 <p><b>Code Example</b> </p><div class="fragment"><div class="line"><span class="comment">/*----------------------------------------------------------------------------</span></div>
 228 <div class="line"><span class="comment"> * Application main thread</span></div>
 229 <div class="line"><span class="comment"> *---------------------------------------------------------------------------*/</span></div>
 230 <div class="line"><span class="keywordtype">void</span> app_main (<span class="keywordtype">void</span> *argument) {</div>
 231 <div class="line"> </div>
 232 <div class="line">  <span class="comment">// ...</span></div>
 233 <div class="line">  <span class="keywordflow">for</span> (;;) {}</div>
 234 <div class="line">}</div>
 235 <div class="line"> </div>
 236 <div class="line"><span class="keywordtype">int</span> main (<span class="keywordtype">void</span>) {</div>
 237 <div class="line"> </div>
 238 <div class="line">  <span class="comment">// System Initialization</span></div>
 239 <div class="line">  SystemCoreClockUpdate();</div>
 240 <div class="line">  <span class="comment">// ...</span></div>
 241 <div class="line"> </div>
 242 <div class="line">  <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae818f6611d25ba3140bede410a52d659">osKernelInitialize</a>();                 <span class="comment">// Initialize CMSIS-RTOS</span></div>
 243 <div class="line">  <a class="code hl_function" href="group__CMSIS__RTOS__ThreadMgmt.html#ga48d68b8666d99d28fa646ee1d2182b8f">osThreadNew</a>(app_main, NULL, NULL);    <span class="comment">// Create application main thread</span></div>
 244 <div class="line">  <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga9ae2cc00f0d89d7b6a307bba942b5221">osKernelStart</a>();                      <span class="comment">// Start thread execution</span></div>
 245 <div class="line">  <span class="keywordflow">for</span> (;;) {}</div>
 246 <div class="line">}</div>
 247 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_ga9ae2cc00f0d89d7b6a307bba942b5221"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#ga9ae2cc00f0d89d7b6a307bba942b5221">osKernelStart</a></div><div class="ttdeci">osStatus_t osKernelStart(void)</div><div class="ttdoc">Start the RTOS Kernel scheduler.</div></div>
 248 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_gae818f6611d25ba3140bede410a52d659"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#gae818f6611d25ba3140bede410a52d659">osKernelInitialize</a></div><div class="ttdeci">osStatus_t osKernelInitialize(void)</div><div class="ttdoc">Initialize the RTOS Kernel.</div></div>
 249 <div class="ttc" id="agroup__CMSIS__RTOS__ThreadMgmt_html_ga48d68b8666d99d28fa646ee1d2182b8f"><div class="ttname"><a href="group__CMSIS__RTOS__ThreadMgmt.html#ga48d68b8666d99d28fa646ee1d2182b8f">osThreadNew</a></div><div class="ttdeci">osThreadId_t osThreadNew(osThreadFunc_t func, void *argument, const osThreadAttr_t *attr)</div><div class="ttdoc">Create a thread and add it to Active Threads.</div></div>
 250 </div><!-- fragment --> <hr/><h2 class="groupheader">Data Structure Documentation</h2>
 251 <a name="structosVersion__t" id="structosVersion__t"></a>
 252 <h2 class="memtitle"><span class="permalink"><a href="#structosVersion__t">&#9670;&#160;</a></span>osVersion_t</h2>
 253
 254 <div class="memitem">
 255 <div class="memproto">
 256       <table class="memname">
 257         <tr>
 258           <td class="memname">struct osVersion_t</td>
 259         </tr>
 260       </table>
 261 </div><div class="memdoc">
 262 <div class="textblock"><p>Identifies the underlying RTOS kernel and API version number. The version is represented in a combined decimal number in the format: major.minor.rev: mmnnnrrrr</p>
 263 <p>Use <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga6f7764e7250c5c5364c00c45a5d1d199">osKernelGetInfo</a> to retrieve the version numbers. </p>
 264 </div><table class="fieldtable">
 265 <tr><th colspan="3">Data Fields</th></tr>
 266 <tr><td class="fieldtype">
 267 <a id="a76a1ef1a4d3d9bd3e70783051f22a6d3" name="a76a1ef1a4d3d9bd3e70783051f22a6d3"></a>uint32_t</td>
 268 <td class="fieldname">
 269 api</td>
 270 <td class="fielddoc">
 271 API version (major.minor.rev: mmnnnrrrr dec). </td></tr>
 272 <tr><td class="fieldtype">
 273 <a id="ad8075d3f42141346ae2c56389358f9e7" name="ad8075d3f42141346ae2c56389358f9e7"></a>uint32_t</td>
 274 <td class="fieldname">
 275 kernel</td>
 276 <td class="fielddoc">
 277 Kernel version (major.minor.rev: mmnnnrrrr dec). </td></tr>
 278 </table>
 279
 280 </div>
 281 </div>
 282 <h2 class="groupheader">Enumeration Type Documentation</h2>
 283 <a id="ga08326469274b668140ca934b168a5ad4" name="ga08326469274b668140ca934b168a5ad4"></a>
 284 <h2 class="memtitle"><span class="permalink"><a href="#ga08326469274b668140ca934b168a5ad4">&#9670;&#160;</a></span>osKernelState_t</h2>
 285
 286 <div class="memitem">
 287 <div class="memproto">
 288       <table class="memname">
 289         <tr>
 290           <td class="memname">enum <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4">osKernelState_t</a></td>
 291         </tr>
 292       </table>
 293 </div><div class="memdoc">
 294 <p>State of the kernel as retrieved by <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga48b69b81012fce051f639be288b243ba">osKernelGetState</a>. In case <b>osKernelGetState</b> fails or if it is called from an ISR, it will return <code>osKernelError</code>, otherwise it returns the kernel state. </p>
 295 <table class="fieldtable">
 296 <tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="ga08326469274b668140ca934b168a5ad4a2ad3e5912db47b497529d036c89e7995" name="ga08326469274b668140ca934b168a5ad4a2ad3e5912db47b497529d036c89e7995"></a>osKernelInactive&#160;</td><td class="fielddoc"><p>Inactive. </p>
 297 <p>The kernel is not ready yet. <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae818f6611d25ba3140bede410a52d659">osKernelInitialize</a> needs to be executed successfully. </p>
 298 </td></tr>
 299 <tr><td class="fieldname"><a id="ga08326469274b668140ca934b168a5ad4a0596c6e14113447604753656417c9a24" name="ga08326469274b668140ca934b168a5ad4a0596c6e14113447604753656417c9a24"></a>osKernelReady&#160;</td><td class="fielddoc"><p>Ready. </p>
 300 <p>The kernel is not yet running. <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga9ae2cc00f0d89d7b6a307bba942b5221">osKernelStart</a> transfers the kernel to the running state. </p>
 301 </td></tr>
 302 <tr><td class="fieldname"><a id="ga08326469274b668140ca934b168a5ad4a8e0b699fbe1c8bb66fefadd5911cb6ce" name="ga08326469274b668140ca934b168a5ad4a8e0b699fbe1c8bb66fefadd5911cb6ce"></a>osKernelRunning&#160;</td><td class="fielddoc"><p>Running. </p>
 303 <p>The kernel is initialized and running. </p>
 304 </td></tr>
 305 <tr><td class="fieldname"><a id="ga08326469274b668140ca934b168a5ad4a2fe382ad5ebab2257b35740414b28b01" name="ga08326469274b668140ca934b168a5ad4a2fe382ad5ebab2257b35740414b28b01"></a>osKernelLocked&#160;</td><td class="fielddoc"><p>Locked. </p>
 306 <p>The kernel was locked with <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a>. The functions <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gaf401728b4657456198c33fe75f8d6720">osKernelUnlock</a> or <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae7d0a71b9586cbbb49fcbdf6a04f0289">osKernelRestoreLock</a> unlocks it. </p>
 307 </td></tr>
 308 <tr><td class="fieldname"><a id="ga08326469274b668140ca934b168a5ad4ad364464ad84d63b1413a9ac8a962390c" name="ga08326469274b668140ca934b168a5ad4ad364464ad84d63b1413a9ac8a962390c"></a>osKernelSuspended&#160;</td><td class="fielddoc"><p>Suspended. </p>
 309 <p>The kernel was suspended using <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae26683e1606ec633354a2876c68f0c1f">osKernelSuspend</a>. The function <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga8c4b4d7ed34cab73c001665d9176aced">osKernelResume</a> returns to normal operation. </p>
 310 </td></tr>
 311 <tr><td class="fieldname"><a id="ga08326469274b668140ca934b168a5ad4a0545c92c18ce8e6b24e82a0d694a0b4a" name="ga08326469274b668140ca934b168a5ad4a0545c92c18ce8e6b24e82a0d694a0b4a"></a>osKernelError&#160;</td><td class="fielddoc"><p>Error. </p>
 312 <p>An error occurred. </p>
 313 </td></tr>
 314 <tr><td class="fieldname"><a id="ga08326469274b668140ca934b168a5ad4ab0a47576defa29396a649d9173d4bc4b" name="ga08326469274b668140ca934b168a5ad4ab0a47576defa29396a649d9173d4bc4b"></a>osKernelReserved&#160;</td><td class="fielddoc"><p>Prevents enum down-size compiler optimization. </p>
 315 <p>Reserved. </p>
 316 </td></tr>
 317 </table>
 318
 319 </div>
 320 </div>
 321 <h2 class="groupheader">Function Documentation</h2>
 322 <a id="gae818f6611d25ba3140bede410a52d659" name="gae818f6611d25ba3140bede410a52d659"></a>
 323 <h2 class="memtitle"><span class="permalink"><a href="#gae818f6611d25ba3140bede410a52d659">&#9670;&#160;</a></span>osKernelInitialize()</h2>
 324
 325 <div class="memitem">
 326 <div class="memproto">
 327       <table class="memname">
 328         <tr>
 329           <td class="memname"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> osKernelInitialize </td>
 330           <td>(</td>
 331           <td class="paramtype">void&#160;</td>
 332           <td class="paramname"></td><td>)</td>
 333           <td></td>
 334         </tr>
 335       </table>
 336 </div><div class="memdoc">
 337 <dl class="section return"><dt>Returns</dt><dd>status code that indicates the execution status of the function.</dd></dl>
 338 <p>The function <b>osKernelInitialize</b> initializes the RTOS Kernel. Before it is successfully executed, only the functions <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga6f7764e7250c5c5364c00c45a5d1d199">osKernelGetInfo</a> and <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga48b69b81012fce051f639be288b243ba">osKernelGetState</a> may be called.</p>
 339 <p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p><ul>
 340 <li><em>osOK</em> in case of success.</li>
 341 <li><em>osError</em> if an unspecific error occurred.</li>
 342 <li><em>osErrorISR</em> if called from an Interrupt Service Routine.</li>
 343 <li><em>osErrorNoMemory</em> if no memory could be reserved for the operation.</li>
 344 </ul>
 345 <dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from Interrupt Service Routines.</dd></dl>
 346 <p><b> Code Example</b> </p><div class="fragment"><div class="line"><span class="preprocessor">#include &quot;RTE_Components.h&quot;</span></div>
 347 <div class="line"><span class="preprocessor">#include  CMSIS_device_header</span></div>
 348 <div class="line"><span class="preprocessor">#include &quot;<a class="code" href="cmsis__os2_8h.html">cmsis_os2.h</a>&quot;</span></div>
 349 <div class="line"> </div>
 350 <div class="line"><span class="comment">/*----------------------------------------------------------------------------</span></div>
 351 <div class="line"><span class="comment"> * Application main thread</span></div>
 352 <div class="line"><span class="comment"> *---------------------------------------------------------------------------*/</span></div>
 353 <div class="line"><span class="keywordtype">void</span> app_main (<span class="keywordtype">void</span> *argument) {</div>
 354 <div class="line"> </div>
 355 <div class="line">  <span class="comment">// ...</span></div>
 356 <div class="line">  <span class="keywordflow">for</span> (;;) {}</div>
 357 <div class="line">}</div>
 358 <div class="line"> </div>
 359 <div class="line"><span class="keywordtype">int</span> main (<span class="keywordtype">void</span>) {</div>
 360 <div class="line"> </div>
 361 <div class="line">  <span class="comment">// System Initialization</span></div>
 362 <div class="line">  SystemCoreClockUpdate();</div>
 363 <div class="line">  <span class="comment">// ...</span></div>
 364 <div class="line"> </div>
 365 <div class="line">  <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae818f6611d25ba3140bede410a52d659">osKernelInitialize</a>();                 <span class="comment">// Initialize CMSIS-RTOS</span></div>
 366 <div class="line">  <a class="code hl_function" href="group__CMSIS__RTOS__ThreadMgmt.html#ga48d68b8666d99d28fa646ee1d2182b8f">osThreadNew</a>(app_main, NULL, NULL);    <span class="comment">// Create application main thread</span></div>
 367 <div class="line">  <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga9ae2cc00f0d89d7b6a307bba942b5221">osKernelStart</a>();                      <span class="comment">// Start thread execution</span></div>
 368 <div class="line">  <span class="keywordflow">for</span> (;;) {}</div>
 369 <div class="line">}</div>
 370 <div class="ttc" id="acmsis__os2_8h_html"><div class="ttname"><a href="cmsis__os2_8h.html">cmsis_os2.h</a></div></div>
 371 </div><!-- fragment -->
 372 </div>
 373 </div>
 374 <a id="ga6f7764e7250c5c5364c00c45a5d1d199" name="ga6f7764e7250c5c5364c00c45a5d1d199"></a>
 375 <h2 class="memtitle"><span class="permalink"><a href="#ga6f7764e7250c5c5364c00c45a5d1d199">&#9670;&#160;</a></span>osKernelGetInfo()</h2>
 376
 377 <div class="memitem">
 378 <div class="memproto">
 379       <table class="memname">
 380         <tr>
 381           <td class="memname"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> osKernelGetInfo </td>
 382           <td>(</td>
 383           <td class="paramtype"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#structosVersion__t">osVersion_t</a> *&#160;</td>
 384           <td class="paramname"><em>version</em>, </td>
 385         </tr>
 386         <tr>
 387           <td class="paramkey"></td>
 388           <td></td>
 389           <td class="paramtype">char *&#160;</td>
 390           <td class="paramname"><em>id_buf</em>, </td>
 391         </tr>
 392         <tr>
 393           <td class="paramkey"></td>
 394           <td></td>
 395           <td class="paramtype">uint32_t&#160;</td>
 396           <td class="paramname"><em>id_size</em>&#160;</td>
 397         </tr>
 398         <tr>
 399           <td></td>
 400           <td>)</td>
 401           <td></td><td></td>
 402         </tr>
 403       </table>
 404 </div><div class="memdoc">
 405 <dl class="params"><dt>Parameters</dt><dd>
 406   <table class="params">
 407     <tr><td class="paramdir">[out]</td><td class="paramname">version</td><td>pointer to buffer for retrieving version information. </td></tr>
 408     <tr><td class="paramdir">[out]</td><td class="paramname">id_buf</td><td>pointer to buffer for retrieving kernel identification string. </td></tr>
 409     <tr><td class="paramdir">[in]</td><td class="paramname">id_size</td><td>size of buffer for kernel identification string. </td></tr>
 410   </table>
 411   </dd>
 412 </dl>
 413 <dl class="section return"><dt>Returns</dt><dd>status code that indicates the execution status of the function.</dd></dl>
 414 <p>The function <b>osKernelGetInfo</b> retrieves the API and kernel version of the underlying RTOS kernel and a human readable identifier string for the kernel. It can be safely called before the RTOS is initialized or started (call to <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae818f6611d25ba3140bede410a52d659">osKernelInitialize</a> or <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga9ae2cc00f0d89d7b6a307bba942b5221">osKernelStart</a>).</p>
 415 <p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p><ul>
 416 <li><em>osOK</em> in case of success.</li>
 417 <li><em>osError</em> if an unspecific error occurred.</li>
 418 </ul>
 419 <dl class="section note"><dt>Note</dt><dd>This function may be called from Interrupt Service Routines.</dd></dl>
 420 <p><b>Code Example</b> </p><div class="fragment"><div class="line"><span class="keywordtype">void</span> info (<span class="keywordtype">void</span>) {</div>
 421 <div class="line">  <span class="keywordtype">char</span> infobuf[100];</div>
 422 <div class="line">  <a class="code hl_struct" href="group__CMSIS__RTOS__KernelCtrl.html#structosVersion__t">osVersion_t</a> osv;</div>
 423 <div class="line">  <a class="code hl_enumeration" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> status;</div>
 424 <div class="line"> </div>
 425 <div class="line">  status = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga6f7764e7250c5c5364c00c45a5d1d199">osKernelGetInfo</a>(&amp;osv, infobuf, <span class="keyword">sizeof</span>(infobuf));</div>
 426 <div class="line">  <span class="keywordflow">if</span>(status == <a class="code hl_enumvalue" href="cmsis__os2_8h.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813ea9e1c9e2550bb4de8969a935acffc968f">osOK</a>) {</div>
 427 <div class="line">    printf(<span class="stringliteral">&quot;Kernel Information: %s\r\n&quot;</span>, infobuf);</div>
 428 <div class="line">    printf(<span class="stringliteral">&quot;Kernel Version    : %d\r\n&quot;</span>, osv.<a class="code hl_variable" href="group__CMSIS__RTOS__KernelCtrl.html#ad8075d3f42141346ae2c56389358f9e7">kernel</a>);</div>
 429 <div class="line">    printf(<span class="stringliteral">&quot;Kernel API Version: %d\r\n&quot;</span>, osv.<a class="code hl_variable" href="group__CMSIS__RTOS__KernelCtrl.html#a76a1ef1a4d3d9bd3e70783051f22a6d3">api</a>);</div>
 430 <div class="line">  }</div>
 431 <div class="line">}</div>
 432 <div class="ttc" id="acmsis__os2_8h_html_ga6c0dbe6069e4e7f47bb4cd32ae2b813ea9e1c9e2550bb4de8969a935acffc968f"><div class="ttname"><a href="cmsis__os2_8h.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813ea9e1c9e2550bb4de8969a935acffc968f">osOK</a></div><div class="ttdeci">@ osOK</div><div class="ttdoc">Operation completed successfully.</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:240</div></div>
 433 <div class="ttc" id="agroup__CMSIS__RTOS__Definitions_html_ga6c0dbe6069e4e7f47bb4cd32ae2b813e"><div class="ttname"><a href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a></div><div class="ttdeci">osStatus_t</div><div class="ttdoc">Status code values returned by CMSIS-RTOS functions.</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:239</div></div>
 434 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_a76a1ef1a4d3d9bd3e70783051f22a6d3"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#a76a1ef1a4d3d9bd3e70783051f22a6d3">osVersion_t::api</a></div><div class="ttdeci">uint32_t api</div><div class="ttdoc">API version (major.minor.rev: mmnnnrrrr dec).</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:93</div></div>
 435 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_ad8075d3f42141346ae2c56389358f9e7"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#ad8075d3f42141346ae2c56389358f9e7">osVersion_t::kernel</a></div><div class="ttdeci">uint32_t kernel</div><div class="ttdoc">Kernel version (major.minor.rev: mmnnnrrrr dec).</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:94</div></div>
 436 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_ga6f7764e7250c5c5364c00c45a5d1d199"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#ga6f7764e7250c5c5364c00c45a5d1d199">osKernelGetInfo</a></div><div class="ttdeci">osStatus_t osKernelGetInfo(osVersion_t *version, char *id_buf, uint32_t id_size)</div><div class="ttdoc">Get RTOS Kernel Information.</div></div>
 437 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_structosVersion__t"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#structosVersion__t">osVersion_t</a></div><div class="ttdoc">Version information.</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:92</div></div>
 438 </div><!-- fragment -->
 439 </div>
 440 </div>
 441 <a id="ga48b69b81012fce051f639be288b243ba" name="ga48b69b81012fce051f639be288b243ba"></a>
 442 <h2 class="memtitle"><span class="permalink"><a href="#ga48b69b81012fce051f639be288b243ba">&#9670;&#160;</a></span>osKernelGetState()</h2>
 443
 444 <div class="memitem">
 445 <div class="memproto">
 446       <table class="memname">
 447         <tr>
 448           <td class="memname"><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4">osKernelState_t</a> osKernelGetState </td>
 449           <td>(</td>
 450           <td class="paramtype">void&#160;</td>
 451           <td class="paramname"></td><td>)</td>
 452           <td></td>
 453         </tr>
 454       </table>
 455 </div><div class="memdoc">
 456 <dl class="section return"><dt>Returns</dt><dd>current RTOS Kernel state.</dd></dl>
 457 <p>The function <b>osKernelGetState</b> returns the current state of the kernel and can be safely called before the RTOS is initialized or started (call to <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae818f6611d25ba3140bede410a52d659">osKernelInitialize</a> or <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga9ae2cc00f0d89d7b6a307bba942b5221">osKernelStart</a>). In case it fails it will return <code>osKernelError</code>, otherwise it returns the kernel state (refer to <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4">osKernelState_t</a> for the list of kernel states).</p>
 458 <p>Possible <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga08326469274b668140ca934b168a5ad4">osKernelState_t</a> return values:</p><ul>
 459 <li><a class="el" href="cmsis__os2_8h.html#ga08326469274b668140ca934b168a5ad4a0545c92c18ce8e6b24e82a0d694a0b4a">osKernelError</a> if an unspecific error occurred.</li>
 460 <li>the actual kernel state otherwise.</li>
 461 </ul>
 462 <dl class="section note"><dt>Note</dt><dd>This function may be called from Interrupt Service Routines.</dd></dl>
 463 <p><b>Code Example</b> </p><div class="fragment"><div class="line"><span class="keywordtype">int</span> main (<span class="keywordtype">void</span>) {</div>
 464 <div class="line">  <span class="comment">// System Initialization</span></div>
 465 <div class="line">  SystemCoreClockUpdate();</div>
 466 <div class="line">  <span class="comment">// ...</span></div>
 467 <div class="line">  <span class="keywordflow">if</span>(<a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga48b69b81012fce051f639be288b243ba">osKernelGetState</a>() == <a class="code hl_enumvalue" href="cmsis__os2_8h.html#ga08326469274b668140ca934b168a5ad4a2ad3e5912db47b497529d036c89e7995">osKernelInactive</a>) {     <span class="comment">// Is the kernel initialized?</span></div>
 468 <div class="line">     <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae818f6611d25ba3140bede410a52d659">osKernelInitialize</a>();                         <span class="comment">// Initialize CMSIS-RTOS kernel</span></div>
 469 <div class="line">  }</div>
 470 <div class="line">  ;</div>
 471 <div class="line">}</div>
 472 <div class="ttc" id="acmsis__os2_8h_html_ga08326469274b668140ca934b168a5ad4a2ad3e5912db47b497529d036c89e7995"><div class="ttname"><a href="cmsis__os2_8h.html#ga08326469274b668140ca934b168a5ad4a2ad3e5912db47b497529d036c89e7995">osKernelInactive</a></div><div class="ttdeci">@ osKernelInactive</div><div class="ttdoc">Inactive.</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:99</div></div>
 473 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_ga48b69b81012fce051f639be288b243ba"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#ga48b69b81012fce051f639be288b243ba">osKernelGetState</a></div><div class="ttdeci">osKernelState_t osKernelGetState(void)</div><div class="ttdoc">Get the current RTOS Kernel state.</div></div>
 474 </div><!-- fragment -->
 475 </div>
 476 </div>
 477 <a id="ga9ae2cc00f0d89d7b6a307bba942b5221" name="ga9ae2cc00f0d89d7b6a307bba942b5221"></a>
 478 <h2 class="memtitle"><span class="permalink"><a href="#ga9ae2cc00f0d89d7b6a307bba942b5221">&#9670;&#160;</a></span>osKernelStart()</h2>
 479
 480 <div class="memitem">
 481 <div class="memproto">
 482       <table class="memname">
 483         <tr>
 484           <td class="memname"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> osKernelStart </td>
 485           <td>(</td>
 486           <td class="paramtype">void&#160;</td>
 487           <td class="paramname"></td><td>)</td>
 488           <td></td>
 489         </tr>
 490       </table>
 491 </div><div class="memdoc">
 492 <dl class="section return"><dt>Returns</dt><dd>status code that indicates the execution status of the function.</dd></dl>
 493 <p>The function <b>osKernelStart</b> starts the RTOS kernel and begins thread switching. It will not return to its calling function in case of success. Before it is successfully executed, only the functions <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga6f7764e7250c5c5364c00c45a5d1d199">osKernelGetInfo</a>, <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga48b69b81012fce051f639be288b243ba">osKernelGetState</a>, and object creation functions (<b>osXxxNew</b>) may be called.</p>
 494 <p>At least one initial thread should be created prior osKernelStart, see <a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#ga48d68b8666d99d28fa646ee1d2182b8f">osThreadNew</a>.</p>
 495 <p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p><ul>
 496 <li><em>osError</em> if an unspecific error occurred.</li>
 497 <li><em>osErrorISR</em> if called from an Interrupt Service Routine.</li>
 498 </ul>
 499 <dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from Interrupt Service Routines.</dd></dl>
 500 <p><b>Code Example</b> </p><div class="fragment"><div class="line"><span class="keywordtype">int</span> main (<span class="keywordtype">void</span>) {</div>
 501 <div class="line">  <span class="comment">// System Initialization</span></div>
 502 <div class="line">  SystemCoreClockUpdate();</div>
 503 <div class="line">  <span class="comment">// ...</span></div>
 504 <div class="line">  <span class="keywordflow">if</span>(<a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga48b69b81012fce051f639be288b243ba">osKernelGetState</a>() == <a class="code hl_enumvalue" href="cmsis__os2_8h.html#ga08326469274b668140ca934b168a5ad4a2ad3e5912db47b497529d036c89e7995">osKernelInactive</a>) {</div>
 505 <div class="line">    <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae818f6611d25ba3140bede410a52d659">osKernelInitialize</a>();</div>
 506 <div class="line">  }</div>
 507 <div class="line">  ; <span class="comment">// ... Start Threads</span></div>
 508 <div class="line">  <span class="keywordflow">if</span> (<a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga48b69b81012fce051f639be288b243ba">osKernelGetState</a>() == <a class="code hl_enumvalue" href="cmsis__os2_8h.html#ga08326469274b668140ca934b168a5ad4a0596c6e14113447604753656417c9a24">osKernelReady</a>) {        <span class="comment">// If kernel is ready to run...</span></div>
 509 <div class="line">    <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga9ae2cc00f0d89d7b6a307bba942b5221">osKernelStart</a>();                                <span class="comment">// ... start thread execution</span></div>
 510 <div class="line">    }</div>
 511 <div class="line">  </div>
 512 <div class="line">  <span class="keywordflow">while</span>(1);                                         <span class="comment">// only reached in case of error</span></div>
 513 <div class="line">}</div>
 514 <div class="ttc" id="acmsis__os2_8h_html_ga08326469274b668140ca934b168a5ad4a0596c6e14113447604753656417c9a24"><div class="ttname"><a href="cmsis__os2_8h.html#ga08326469274b668140ca934b168a5ad4a0596c6e14113447604753656417c9a24">osKernelReady</a></div><div class="ttdeci">@ osKernelReady</div><div class="ttdoc">Ready.</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:100</div></div>
 515 </div><!-- fragment -->
 516 </div>
 517 </div>
 518 <a id="ga948609ee930d9b38336b9e1c2a4dfe12" name="ga948609ee930d9b38336b9e1c2a4dfe12"></a>
 519 <h2 class="memtitle"><span class="permalink"><a href="#ga948609ee930d9b38336b9e1c2a4dfe12">&#9670;&#160;</a></span>osKernelLock()</h2>
 520
 521 <div class="memitem">
 522 <div class="memproto">
 523       <table class="memname">
 524         <tr>
 525           <td class="memname">int32_t osKernelLock </td>
 526           <td>(</td>
 527           <td class="paramtype">void&#160;</td>
 528           <td class="paramname"></td><td>)</td>
 529           <td></td>
 530         </tr>
 531       </table>
 532 </div><div class="memdoc">
 533 <dl class="section return"><dt>Returns</dt><dd>previous lock state (1 - locked, 0 - not locked, error code if negative).</dd></dl>
 534 <p>The function <b>osKernelLock</b> allows to lock all task switches. It returns the previous value of the lock state (<span class="XML-Token">1</span> if it was locked, <span class="XML-Token">0</span> if it was unlocked), or a negative number representing an error code otherwise (refer to <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a>).</p>
 535 <p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p><ul>
 536 <li><em>osError</em> if an unspecific error occurred.</li>
 537 <li><em>osErrorISR</em> if called from an Interrupt Service Routine.</li>
 538 <li><em>osErrorSafetyClass</em> if the calling thread safety class is lower than the kernel protect safety class.</li>
 539 </ul>
 540 <dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from Interrupt Service Routines.</dd></dl>
 541 <p><b>Code Example</b> </p><div class="fragment"><div class="line">int32_t state = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a>();</div>
 542 <div class="line"><span class="comment">// ... critical code</span></div>
 543 <div class="line">osKernelRestore(state);</div>
 544 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_ga948609ee930d9b38336b9e1c2a4dfe12"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a></div><div class="ttdeci">int32_t osKernelLock(void)</div><div class="ttdoc">Lock the RTOS Kernel scheduler.</div></div>
 545 </div><!-- fragment -->
 546 </div>
 547 </div>
 548 <a id="gaf401728b4657456198c33fe75f8d6720" name="gaf401728b4657456198c33fe75f8d6720"></a>
 549 <h2 class="memtitle"><span class="permalink"><a href="#gaf401728b4657456198c33fe75f8d6720">&#9670;&#160;</a></span>osKernelUnlock()</h2>
 550
 551 <div class="memitem">
 552 <div class="memproto">
 553       <table class="memname">
 554         <tr>
 555           <td class="memname">int32_t osKernelUnlock </td>
 556           <td>(</td>
 557           <td class="paramtype">void&#160;</td>
 558           <td class="paramname"></td><td>)</td>
 559           <td></td>
 560         </tr>
 561       </table>
 562 </div><div class="memdoc">
 563 <dl class="section return"><dt>Returns</dt><dd>previous lock state (1 - locked, 0 - not locked, error code if negative).</dd></dl>
 564 <p>The function <b>osKernelUnlock</b> resumes from <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a>. It returns the previous value of the lock state (<span class="XML-Token">1</span> if it was locked, <span class="XML-Token">0</span> if it was unlocked), or a negative number representing an error code otherwise (refer to <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a>).</p>
 565 <p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p><ul>
 566 <li><em>osError</em> if an unspecific error occurred.</li>
 567 <li><em>osErrorISR</em> if called from an Interrupt Service Routine.</li>
 568 </ul>
 569 <dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from Interrupt Service Routines.</dd></dl>
 570 <p><b>Code Example</b> </p><div class="fragment"><div class="line">int32_t sl = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a>();</div>
 571 <div class="line"><span class="comment">// ... critical code</span></div>
 572 <div class="line">{</div>
 573 <div class="line">  int32_t su = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gaf401728b4657456198c33fe75f8d6720">osKernelUnlock</a>();</div>
 574 <div class="line">  <span class="comment">// ... uncritical code</span></div>
 575 <div class="line">  <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae7d0a71b9586cbbb49fcbdf6a04f0289">osKernelRestoreLock</a>(su);</div>
 576 <div class="line">}</div>
 577 <div class="line"><span class="comment">// ... critical code</span></div>
 578 <div class="line"><a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae7d0a71b9586cbbb49fcbdf6a04f0289">osKernelRestoreLock</a>(sl);</div>
 579 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_gae7d0a71b9586cbbb49fcbdf6a04f0289"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#gae7d0a71b9586cbbb49fcbdf6a04f0289">osKernelRestoreLock</a></div><div class="ttdeci">int32_t osKernelRestoreLock(int32_t lock)</div><div class="ttdoc">Restore the RTOS Kernel scheduler lock state.</div></div>
 580 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_gaf401728b4657456198c33fe75f8d6720"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#gaf401728b4657456198c33fe75f8d6720">osKernelUnlock</a></div><div class="ttdeci">int32_t osKernelUnlock(void)</div><div class="ttdoc">Unlock the RTOS Kernel scheduler.</div></div>
 581 </div><!-- fragment -->
 582 </div>
 583 </div>
 584 <a id="gae7d0a71b9586cbbb49fcbdf6a04f0289" name="gae7d0a71b9586cbbb49fcbdf6a04f0289"></a>
 585 <h2 class="memtitle"><span class="permalink"><a href="#gae7d0a71b9586cbbb49fcbdf6a04f0289">&#9670;&#160;</a></span>osKernelRestoreLock()</h2>
 586
 587 <div class="memitem">
 588 <div class="memproto">
 589       <table class="memname">
 590         <tr>
 591           <td class="memname">int32_t osKernelRestoreLock </td>
 592           <td>(</td>
 593           <td class="paramtype">int32_t&#160;</td>
 594           <td class="paramname"><em>lock</em></td><td>)</td>
 595           <td></td>
 596         </tr>
 597       </table>
 598 </div><div class="memdoc">
 599 <dl class="params"><dt>Parameters</dt><dd>
 600   <table class="params">
 601     <tr><td class="paramdir">[in]</td><td class="paramname">lock</td><td>lock state obtained by <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a> or <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gaf401728b4657456198c33fe75f8d6720">osKernelUnlock</a>. </td></tr>
 602   </table>
 603   </dd>
 604 </dl>
 605 <dl class="section return"><dt>Returns</dt><dd>new lock state (1 - locked, 0 - not locked, error code if negative).</dd></dl>
 606 <p>The function <b>osKernelRestoreLock</b> restores the previous lock state after <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a> or <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gaf401728b4657456198c33fe75f8d6720">osKernelUnlock</a>.</p>
 607 <p>The argument <em>lock</em> specifies the lock state as obtained by <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a> or <a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gaf401728b4657456198c33fe75f8d6720">osKernelUnlock</a>.</p>
 608 <p>The function returns the new value of the lock state (<span class="XML-Token">1</span> if it was locked, <span class="XML-Token">0</span> if it was unlocked), or a negative number representing an error code otherwise (refer to <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a>).</p>
 609 <p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p><ul>
 610 <li><em>osError</em> if an unspecific error occurred.</li>
 611 <li><em>osErrorISR</em> if called from interrupt other than fault or <a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#ga5a02770aaf65c7a3c7562c109884176a">osWatchdogAlarm_Handler</a>.</li>
 612 <li><em>osErrorSafetyClass</em> if the calling thread safety class is lower than the kernel protect safety class.</li>
 613 </ul>
 614 <p><b>Code Example</b> </p><div class="fragment"><div class="line">int32_t sl = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a>();</div>
 615 <div class="line"><span class="comment">// ... critical code</span></div>
 616 <div class="line">{</div>
 617 <div class="line">  int32_t su = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gaf401728b4657456198c33fe75f8d6720">osKernelUnlock</a>();</div>
 618 <div class="line">  <span class="comment">// ... uncritical code</span></div>
 619 <div class="line">  <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae7d0a71b9586cbbb49fcbdf6a04f0289">osKernelRestoreLock</a>(su);</div>
 620 <div class="line">}</div>
 621 <div class="line"><span class="comment">// ... critical code</span></div>
 622 <div class="line"><a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae7d0a71b9586cbbb49fcbdf6a04f0289">osKernelRestoreLock</a>(sl);</div>
 623 </div><!-- fragment -->
 624 </div>
 625 </div>
 626 <a id="gae26683e1606ec633354a2876c68f0c1f" name="gae26683e1606ec633354a2876c68f0c1f"></a>
 627 <h2 class="memtitle"><span class="permalink"><a href="#gae26683e1606ec633354a2876c68f0c1f">&#9670;&#160;</a></span>osKernelSuspend()</h2>
 628
 629 <div class="memitem">
 630 <div class="memproto">
 631       <table class="memname">
 632         <tr>
 633           <td class="memname">uint32_t osKernelSuspend </td>
 634           <td>(</td>
 635           <td class="paramtype">void&#160;</td>
 636           <td class="paramname"></td><td>)</td>
 637           <td></td>
 638         </tr>
 639       </table>
 640 </div><div class="memdoc">
 641 <dl class="section return"><dt>Returns</dt><dd>time in ticks, for how long the system can sleep or power-down.</dd></dl>
 642 <p>CMSIS-RTOS provides extension for tick-less operation which is useful for applications that use extensively low-power modes where the SysTick timer is also disabled. To provide a time-tick in such power-saving modes a wake-up timer is used to derive timer intervals. The function <b>osKernelSuspend</b> suspends the RTX kernel scheduler and thus enables sleep modes.</p>
 643 <p>The return value can be used to determine the amount of system ticks until the next tick-based kernel event will occur, i.e. a delayed thread becomes ready again. It is recommended to set up the low power timer to generate a wake-up interrupt based on this return value.</p>
 644 <dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from Interrupt Service Routines.</dd></dl>
 645 <p><b>Code Example</b> </p><div class="fragment"><div class="line"><span class="keywordtype">void</span> osRtxIdleThread (<span class="keywordtype">void</span>) {</div>
 646 <div class="line">                                               <span class="comment">/* The idle thread is running</span></div>
 647 <div class="line"><span class="comment">                                                  when no other thread is ready</span></div>
 648 <div class="line"><span class="comment">                                                  to run.                      */</span></div>
 649 <div class="line">  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> sleep;</div>
 650 <div class="line"> </div>
 651 <div class="line">  <span class="keywordflow">for</span> (;;) {</div>
 652 <div class="line">                                               <span class="comment">/* HERE: include optional user</span></div>
 653 <div class="line"><span class="comment">                                                  code to be executed when no</span></div>
 654 <div class="line"><span class="comment">                                                  task runs.                   */</span></div>
 655 <div class="line">    sleep = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae26683e1606ec633354a2876c68f0c1f">osKernelSuspend</a>();                 <span class="comment">/* Suspend RTX thread scheduler */</span></div>
 656 <div class="line"> </div>
 657 <div class="line">    <span class="keywordflow">if</span> (sleep) {                               <span class="comment">/* How long can we sleep?       */</span></div>
 658 <div class="line">                                               <span class="comment">/* &quot;sleep&quot; is in RTX Timer Ticks</span></div>
 659 <div class="line"><span class="comment">                                                  which is 1ms in this</span></div>
 660 <div class="line"><span class="comment">                                                  configuration                */</span></div>
 661 <div class="line">       </div>
 662 <div class="line">                                               <span class="comment">/* Setup wake-up e.g. watchdog  */</span></div>
 663 <div class="line"> </div>
 664 <div class="line">      __WFE();                                 <span class="comment">/* Enter Power-down mode        */</span></div>
 665 <div class="line">      </div>
 666 <div class="line">                                               <span class="comment">/* After Wake-up                */</span></div>
 667 <div class="line">      sleep = tc;                              <span class="comment">/* Adjust with cycles slept     */</span>  </div>
 668 <div class="line">    }</div>
 669 <div class="line"> </div>
 670 <div class="line">    <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga8c4b4d7ed34cab73c001665d9176aced">osKernelResume</a>(sleep);                     <span class="comment">/* Resume thread scheduler      */</span></div>
 671 <div class="line">  }</div>
 672 <div class="line">}</div>
 673 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_ga8c4b4d7ed34cab73c001665d9176aced"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#ga8c4b4d7ed34cab73c001665d9176aced">osKernelResume</a></div><div class="ttdeci">void osKernelResume(uint32_t sleep_ticks)</div><div class="ttdoc">Resume the RTOS Kernel scheduler.</div></div>
 674 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_gae26683e1606ec633354a2876c68f0c1f"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#gae26683e1606ec633354a2876c68f0c1f">osKernelSuspend</a></div><div class="ttdeci">uint32_t osKernelSuspend(void)</div><div class="ttdoc">Suspend the RTOS Kernel scheduler.</div></div>
 675 </div><!-- fragment -->
 676 </div>
 677 </div>
 678 <a id="ga8c4b4d7ed34cab73c001665d9176aced" name="ga8c4b4d7ed34cab73c001665d9176aced"></a>
 679 <h2 class="memtitle"><span class="permalink"><a href="#ga8c4b4d7ed34cab73c001665d9176aced">&#9670;&#160;</a></span>osKernelResume()</h2>
 680
 681 <div class="memitem">
 682 <div class="memproto">
 683       <table class="memname">
 684         <tr>
 685           <td class="memname">void osKernelResume </td>
 686           <td>(</td>
 687           <td class="paramtype">uint32_t&#160;</td>
 688           <td class="paramname"><em>sleep_ticks</em></td><td>)</td>
 689           <td></td>
 690         </tr>
 691       </table>
 692 </div><div class="memdoc">
 693 <dl class="params"><dt>Parameters</dt><dd>
 694   <table class="params">
 695     <tr><td class="paramdir">[in]</td><td class="paramname">sleep_ticks</td><td>time in ticks for how long the system was in sleep or power-down mode.</td></tr>
 696   </table>
 697   </dd>
 698 </dl>
 699 <p>CMSIS-RTOS provides extension for tick-less operation which is useful for applications that use extensively low-power modes where the SysTick timer is also disabled. To provide a time-tick in such power-saving modes a wake-up timer is used to derive timer intervals. The function <b>osKernelResume</b> enables the RTX kernel scheduler and thus wakes up the system from sleep mode.</p>
 700 <dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from Interrupt Service Routines.</dd></dl>
 701 <p><b>Code Example</b> </p><div class="fragment"><div class="line"><span class="keywordtype">void</span> osRtxIdleThread (<span class="keywordtype">void</span>) {</div>
 702 <div class="line">                                               <span class="comment">/* The idle thread is running</span></div>
 703 <div class="line"><span class="comment">                                                  when no other thread is ready</span></div>
 704 <div class="line"><span class="comment">                                                  to run.                      */</span></div>
 705 <div class="line">  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> sleep;</div>
 706 <div class="line"> </div>
 707 <div class="line">  <span class="keywordflow">for</span> (;;) {</div>
 708 <div class="line">                                               <span class="comment">/* HERE: include optional user</span></div>
 709 <div class="line"><span class="comment">                                                  code to be executed when no</span></div>
 710 <div class="line"><span class="comment">                                                  task runs.                   */</span></div>
 711 <div class="line">    sleep = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae26683e1606ec633354a2876c68f0c1f">osKernelSuspend</a>();                 <span class="comment">/* Suspend RTX thread scheduler */</span></div>
 712 <div class="line"> </div>
 713 <div class="line">    <span class="keywordflow">if</span> (sleep) {                               <span class="comment">/* How long can we sleep?       */</span></div>
 714 <div class="line">                                               <span class="comment">/* &quot;sleep&quot; is in RTX Timer Ticks</span></div>
 715 <div class="line"><span class="comment">                                                  which is 1ms in this</span></div>
 716 <div class="line"><span class="comment">                                                  configuration                */</span></div>
 717 <div class="line">       </div>
 718 <div class="line">                                               <span class="comment">/* Setup wake-up e.g. watchdog  */</span></div>
 719 <div class="line"> </div>
 720 <div class="line">      __WFE();                                 <span class="comment">/* Enter Power-down mode        */</span></div>
 721 <div class="line">      </div>
 722 <div class="line">                                               <span class="comment">/* After Wake-up                */</span></div>
 723 <div class="line">      sleep = tc;                              <span class="comment">/* Adjust with cycles slept     */</span>  </div>
 724 <div class="line">    }</div>
 725 <div class="line"> </div>
 726 <div class="line">    <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga8c4b4d7ed34cab73c001665d9176aced">osKernelResume</a>(sleep);                     <span class="comment">/* Resume thread scheduler      */</span></div>
 727 <div class="line">  }</div>
 728 <div class="line">}</div>
 729 </div><!-- fragment -->
 730 </div>
 731 </div>
 732 <a id="ga84bcdbf2fb76b10c8df4e439f0c7e11b" name="ga84bcdbf2fb76b10c8df4e439f0c7e11b"></a>
 733 <h2 class="memtitle"><span class="permalink"><a href="#ga84bcdbf2fb76b10c8df4e439f0c7e11b">&#9670;&#160;</a></span>osKernelGetTickCount()</h2>
 734
 735 <div class="memitem">
 736 <div class="memproto">
 737       <table class="memname">
 738         <tr>
 739           <td class="memname">uint32_t osKernelGetTickCount </td>
 740           <td>(</td>
 741           <td class="paramtype">void&#160;</td>
 742           <td class="paramname"></td><td>)</td>
 743           <td></td>
 744         </tr>
 745       </table>
 746 </div><div class="memdoc">
 747 <dl class="section return"><dt>Returns</dt><dd>RTOS kernel current tick count.</dd></dl>
 748 <p>The function <b>osKernelGetTickCount</b> returns the current RTOS kernel tick count.</p>
 749 <dl class="section note"><dt>Note</dt><dd>This function may be called from Interrupt Service Routines.</dd></dl>
 750 <p><b>Code</b> <b>Example</b> </p><div class="fragment"><div class="line"><span class="preprocessor">#include &quot;<a class="code" href="cmsis__os2_8h.html">cmsis_os2.h</a>&quot;</span></div>
 751 <div class="line"> </div>
 752 <div class="line"><span class="keywordtype">void</span> Thread_1 (<span class="keywordtype">void</span> *arg)  {                <span class="comment">// Thread function</span></div>
 753 <div class="line">  uint32_t tick;</div>
 754 <div class="line"> </div>
 755 <div class="line">  tick = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga84bcdbf2fb76b10c8df4e439f0c7e11b">osKernelGetTickCount</a>();            <span class="comment">// retrieve the number of system ticks</span></div>
 756 <div class="line">  <span class="keywordflow">for</span> (;;) {</div>
 757 <div class="line">    tick += 1000;                           <span class="comment">// delay 1000 ticks periodically</span></div>
 758 <div class="line">    <a class="code hl_function" href="group__CMSIS__RTOS__Wait.html#ga3c807924c2d6d43bc2ffb49da3f7f3a1">osDelayUntil</a>(tick);</div>
 759 <div class="line">    <span class="comment">// ...</span></div>
 760 <div class="line">  }</div>
 761 <div class="line">}</div>
 762 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_ga84bcdbf2fb76b10c8df4e439f0c7e11b"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#ga84bcdbf2fb76b10c8df4e439f0c7e11b">osKernelGetTickCount</a></div><div class="ttdeci">uint32_t osKernelGetTickCount(void)</div><div class="ttdoc">Get the RTOS kernel tick count.</div></div>
 763 <div class="ttc" id="agroup__CMSIS__RTOS__Wait_html_ga3c807924c2d6d43bc2ffb49da3f7f3a1"><div class="ttname"><a href="group__CMSIS__RTOS__Wait.html#ga3c807924c2d6d43bc2ffb49da3f7f3a1">osDelayUntil</a></div><div class="ttdeci">osStatus_t osDelayUntil(uint32_t ticks)</div><div class="ttdoc">Wait until specified time.</div></div>
 764 </div><!-- fragment --><p>Due to the limited value range used for the tick count it may overflow during runtime, i.e. after 2<sup>32</sup> ticks which are roughly 49days @ 1ms. Typically one has not to take special care of this unless a monotonic counter is needed. For such a case an additional 64bit tick counter can be implemented as follows. The given example needs GetTick() called at least twice per tick overflow to work properly.</p>
 765 <p><b>Code</b> <b>Example</b> </p><div class="fragment"><div class="line">uint64_t GetTick(<span class="keywordtype">void</span>) {</div>
 766 <div class="line">  <span class="keyword">static</span> uint32_t tick_h = 0U;</div>
 767 <div class="line">  <span class="keyword">static</span> uint32_t tick_l = 0U;</div>
 768 <div class="line">         uint32_t tick;</div>
 769 <div class="line"> </div>
 770 <div class="line">  tick = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga84bcdbf2fb76b10c8df4e439f0c7e11b">osKernelGetTickCount</a>();</div>
 771 <div class="line">  <span class="keywordflow">if</span> (tick &lt; tick_l) {</div>
 772 <div class="line">    tick_h++;</div>
 773 <div class="line">  }</div>
 774 <div class="line">  tick_l = tick;</div>
 775 <div class="line"> </div>
 776 <div class="line">  <span class="keywordflow">return</span> (((uint64_t)tick_h &lt;&lt; 32) | tick_l);</div>
 777 <div class="line">}</div>
 778 </div><!-- fragment -->
 779 </div>
 780 </div>
 781 <a id="ga7a8d7bd927eaaa58999f91d7d6310cee" name="ga7a8d7bd927eaaa58999f91d7d6310cee"></a>
 782 <h2 class="memtitle"><span class="permalink"><a href="#ga7a8d7bd927eaaa58999f91d7d6310cee">&#9670;&#160;</a></span>osKernelGetTickFreq()</h2>
 783
 784 <div class="memitem">
 785 <div class="memproto">
 786       <table class="memname">
 787         <tr>
 788           <td class="memname">uint32_t osKernelGetTickFreq </td>
 789           <td>(</td>
 790           <td class="paramtype">void&#160;</td>
 791           <td class="paramname"></td><td>)</td>
 792           <td></td>
 793         </tr>
 794       </table>
 795 </div><div class="memdoc">
 796 <dl class="section return"><dt>Returns</dt><dd>frequency of the kernel tick in hertz, i.e. kernel ticks per second.</dd></dl>
 797 <p>The function <b>osKernelGetTickFreq</b> returns the frequency of the current RTOS kernel tick.</p>
 798 <dl class="section note"><dt>Note</dt><dd>This function may be called from Interrupt Service Routines. </dd></dl>
 799
 800 </div>
 801 </div>
 802 <a id="gae0fcaff6cecfb4013bb556c87afcd7d2" name="gae0fcaff6cecfb4013bb556c87afcd7d2"></a>
 803 <h2 class="memtitle"><span class="permalink"><a href="#gae0fcaff6cecfb4013bb556c87afcd7d2">&#9670;&#160;</a></span>osKernelGetSysTimerCount()</h2>
 804
 805 <div class="memitem">
 806 <div class="memproto">
 807       <table class="memname">
 808         <tr>
 809           <td class="memname">uint32_t osKernelGetSysTimerCount </td>
 810           <td>(</td>
 811           <td class="paramtype">void&#160;</td>
 812           <td class="paramname"></td><td>)</td>
 813           <td></td>
 814         </tr>
 815       </table>
 816 </div><div class="memdoc">
 817 <dl class="section return"><dt>Returns</dt><dd>RTOS kernel current system timer count as 32-bit value.</dd></dl>
 818 <p>The function <b>osKernelGetSysTimerCount</b> returns the current RTOS kernel system timer as a 32-bit value. The value is a rolling 32-bit counter that is composed of the kernel system interrupt timer value and the counter that counts these interrupts (RTOS kernel ticks).</p>
 819 <p>This function allows the implementation of very short timeout checks below the RTOS tick granularity. Such checks might be required when checking for a busy status in a device or peripheral initialization routine, see code example below.</p>
 820 <dl class="section note"><dt>Note</dt><dd>This function may be called from Interrupt Service Routines.</dd></dl>
 821 <p><b>Code Example</b> </p><div class="fragment"><div class="line"><span class="preprocessor">#include &quot;<a class="code" href="cmsis__os2_8h.html">cmsis_os2.h</a>&quot;</span></div>
 822 <div class="line"> </div>
 823 <div class="line"><span class="keywordtype">void</span> SetupDevice (<span class="keywordtype">void</span>)  {</div>
 824 <div class="line">  uint32_t tick;</div>
 825 <div class="line">  </div>
 826 <div class="line">  <span class="comment">// Calculating 100us timeout in system timer ticks</span></div>
 827 <div class="line">  <span class="keyword">const</span> uint32_t timeout = 100U * <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga4d69215a93220f72be3684cad582f16a">osKernelGetSysTimerFreq</a>() / 1000000u;</div>
 828 <div class="line">  </div>
 829 <div class="line">  tick = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae0fcaff6cecfb4013bb556c87afcd7d2">osKernelGetSysTimerCount</a>();             <span class="comment">// get start value of the Kernel system tick</span></div>
 830 <div class="line">  Device.Setup ();                               <span class="comment">// initialize a device or peripheral</span></div>
 831 <div class="line">  <span class="keywordflow">do</span> {                                           <span class="comment">// poll device busy status for 100 microseconds</span></div>
 832 <div class="line">    <span class="keywordflow">if</span> (!Device.Busy) <span class="keywordflow">break</span>;                     <span class="comment">// check if device is correctly initialized</span></div>
 833 <div class="line">  } <span class="keywordflow">while</span> ((<a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gae0fcaff6cecfb4013bb556c87afcd7d2">osKernelGetSysTimerCount</a>() - tick) &lt; timeout));</div>
 834 <div class="line">  <span class="keywordflow">if</span> (Device.Busy)  {              </div>
 835 <div class="line">    ;                                            <span class="comment">// in case device still busy, signal error</span></div>
 836 <div class="line">  }</div>
 837 <div class="line">                                                 <span class="comment">// start interacting with device</span></div>
 838 <div class="line">}</div>
 839 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_ga4d69215a93220f72be3684cad582f16a"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#ga4d69215a93220f72be3684cad582f16a">osKernelGetSysTimerFreq</a></div><div class="ttdeci">uint32_t osKernelGetSysTimerFreq(void)</div><div class="ttdoc">Get the RTOS kernel system timer frequency.</div></div>
 840 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_gae0fcaff6cecfb4013bb556c87afcd7d2"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#gae0fcaff6cecfb4013bb556c87afcd7d2">osKernelGetSysTimerCount</a></div><div class="ttdeci">uint32_t osKernelGetSysTimerCount(void)</div><div class="ttdoc">Get the RTOS kernel system timer count.</div></div>
 841 </div><!-- fragment -->
 842 </div>
 843 </div>
 844 <a id="ga4d69215a93220f72be3684cad582f16a" name="ga4d69215a93220f72be3684cad582f16a"></a>
 845 <h2 class="memtitle"><span class="permalink"><a href="#ga4d69215a93220f72be3684cad582f16a">&#9670;&#160;</a></span>osKernelGetSysTimerFreq()</h2>
 846
 847 <div class="memitem">
 848 <div class="memproto">
 849       <table class="memname">
 850         <tr>
 851           <td class="memname">uint32_t osKernelGetSysTimerFreq </td>
 852           <td>(</td>
 853           <td class="paramtype">void&#160;</td>
 854           <td class="paramname"></td><td>)</td>
 855           <td></td>
 856         </tr>
 857       </table>
 858 </div><div class="memdoc">
 859 <dl class="section return"><dt>Returns</dt><dd>frequency of the system timer in hertz, i.e. timer ticks per second.</dd></dl>
 860 <p>The function <b>osKernelGetSysTimerFreq</b> returns the frequency of the current RTOS kernel system timer.</p>
 861 <dl class="section note"><dt>Note</dt><dd>This function may be called from Interrupt Service Routines. </dd></dl>
 862
 863 </div>
 864 </div>
 865 <a id="gac7e3b012c15c55bda68e0dd96ad9cd72" name="gac7e3b012c15c55bda68e0dd96ad9cd72"></a>
 866 <h2 class="memtitle"><span class="permalink"><a href="#gac7e3b012c15c55bda68e0dd96ad9cd72">&#9670;&#160;</a></span>osKernelProtect()</h2>
 867
 868 <div class="memitem">
 869 <div class="memproto">
 870       <table class="memname">
 871         <tr>
 872           <td class="memname"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> osKernelProtect </td>
 873           <td>(</td>
 874           <td class="paramtype">uint32_t&#160;</td>
 875           <td class="paramname"><em>safety_class</em></td><td>)</td>
 876           <td></td>
 877         </tr>
 878       </table>
 879 </div><div class="memdoc">
 880 <dl class="params"><dt>Parameters</dt><dd>
 881   <table class="params">
 882     <tr><td class="paramdir">[in]</td><td class="paramname">safety_class</td><td>safety class. </td></tr>
 883   </table>
 884   </dd>
 885 </dl>
 886 <dl class="section return"><dt>Returns</dt><dd>status code that indicates the execution status of the function.</dd></dl>
 887 <p>The function <b>osKernelProtect</b> configures kernel access protection. After its successful execution, only threads with safety class equal or higher than the <em>safety_class</em> specified in the argument can execute kernel control functions.</p><ul>
 888 <li><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga948609ee930d9b38336b9e1c2a4dfe12">osKernelLock</a></li>
 889 <li><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gaf401728b4657456198c33fe75f8d6720">osKernelUnlock</a></li>
 890 <li><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae7d0a71b9586cbbb49fcbdf6a04f0289">osKernelRestoreLock</a></li>
 891 <li><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gae26683e1606ec633354a2876c68f0c1f">osKernelSuspend</a></li>
 892 <li><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#ga8c4b4d7ed34cab73c001665d9176aced">osKernelResume</a></li>
 893 <li><a class="el" href="group__CMSIS__RTOS__KernelCtrl.html#gac7e3b012c15c55bda68e0dd96ad9cd72">osKernelProtect</a></li>
 894 </ul>
 895 <p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p><ul>
 896 <li><em>osOK</em> in case of success.</li>
 897 <li><em>osErrorParameter</em> if <em>safety_class</em> is invalid.</li>
 898 <li><em>osError</em> if kernel is not in ready or running state.</li>
 899 <li><em>osErrorISR</em> if called from an Interrupt Service Routine.</li>
 900 <li><em>osErrorSafetyClass</em> if the calling thread safety class is lower than the kernel protect safety class.</li>
 901 </ul>
 902 <dl class="section note"><dt>Note</dt><dd>This function <b>cannot</b> be called from Interrupt Service Routines.</dd></dl>
 903 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><span class="preprocessor">#include &quot;<a class="code" href="cmsis__os2_8h.html">cmsis_os2.h</a>&quot;</span></div>
 904 <div class="line"> </div>
 905 <div class="line"><span class="keywordtype">void</span> ProtectKernelControlFunctions (<span class="keywordtype">void</span>) {</div>
 906 <div class="line">  <a class="code hl_enumeration" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> status;</div>
 907 <div class="line"> </div>
 908 <div class="line">  status = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#gac7e3b012c15c55bda68e0dd96ad9cd72">osKernelProtect</a>(4U); <span class="comment">// Enable Kernel Control for threads with safety class 4 or higher</span></div>
 909 <div class="line">  <span class="comment">// verify status value here.</span></div>
 910 <div class="line">}</div>
 911 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_gac7e3b012c15c55bda68e0dd96ad9cd72"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#gac7e3b012c15c55bda68e0dd96ad9cd72">osKernelProtect</a></div><div class="ttdeci">osStatus_t osKernelProtect(uint32_t safety_class)</div><div class="ttdoc">Protect the RTOS Kernel scheduler access.</div></div>
 912 </div><!-- fragment -->
 913 </div>
 914 </div>
 915 <a id="ga2065364d1bc805a40e749430377df1e1" name="ga2065364d1bc805a40e749430377df1e1"></a>
 916 <h2 class="memtitle"><span class="permalink"><a href="#ga2065364d1bc805a40e749430377df1e1">&#9670;&#160;</a></span>osKernelDestroyClass()</h2>
 917
 918 <div class="memitem">
 919 <div class="memproto">
 920       <table class="memname">
 921         <tr>
 922           <td class="memname"><a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> osKernelDestroyClass </td>
 923           <td>(</td>
 924           <td class="paramtype">uint32_t&#160;</td>
 925           <td class="paramname"><em>safety_class</em>, </td>
 926         </tr>
 927         <tr>
 928           <td class="paramkey"></td>
 929           <td></td>
 930           <td class="paramtype">uint32_t&#160;</td>
 931           <td class="paramname"><em>mode</em>&#160;</td>
 932         </tr>
 933         <tr>
 934           <td></td>
 935           <td>)</td>
 936           <td></td><td></td>
 937         </tr>
 938       </table>
 939 </div><div class="memdoc">
 940 <dl class="params"><dt>Parameters</dt><dd>
 941   <table class="params">
 942     <tr><td class="paramdir">[in]</td><td class="paramname">safety_class</td><td>safety class. </td></tr>
 943     <tr><td class="paramdir">[in]</td><td class="paramname">mode</td><td>safety mode. </td></tr>
 944   </table>
 945   </dd>
 946 </dl>
 947 <dl class="section return"><dt>Returns</dt><dd>status code that indicates the execution status of the function.</dd></dl>
 948 <p>The function <b>osKernelDestroyClass</b> destroys RTOS objects based on safety class assignment. <em>safety_class</em> provides the reference safety class value, while <em>mode</em> is considered as a bitmap that additionally specifies the safety classes to be destroyed.</p>
 949 <p>If <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga7abd2d95425d9e02672778b3464b2eaa">osSafetyWithSameClass</a> is set in <em>mode</em> than the RTOS objects with safety class value equal to <em>safety_class</em> will be destroyed. <br  />
 950  If <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga8c77ee126b9215425fc004ee13cdc6de">osSafetyWithLowerClass</a> is set in <em>mode</em> than the RTOS objects with safety class value lower than <em>safety_class</em> will be destroyed.</p>
 951 <p>Possible <a class="el" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> return values:</p><ul>
 952 <li><em>osOK</em> in case of success.</li>
 953 <li><em>osErrorParameter</em> if <em>safety_class</em> is invalid.</li>
 954 <li><em>osErrorResource</em> if no other <a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#ThreadStates">READY</a> thread exists.</li>
 955 <li><em>osErrorISR</em> if called from interrupt other than <a class="el" href="group__CMSIS__RTOS__ThreadMgmt.html#ga5a02770aaf65c7a3c7562c109884176a">osWatchdogAlarm_Handler</a>.</li>
 956 <li><em>osErrorSafetyClass</em> if the calling thread safety class is lower than the kernel protect safety class.</li>
 957 </ul>
 958 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><span class="preprocessor">#include &quot;<a class="code" href="cmsis__os2_8h.html">cmsis_os2.h</a>&quot;</span></div>
 959 <div class="line"> </div>
 960 <div class="line"><span class="keywordtype">void</span> DestroyNonCriticalClasses (<span class="keywordtype">void</span>) {</div>
 961 <div class="line">  <a class="code hl_enumeration" href="group__CMSIS__RTOS__Definitions.html#ga6c0dbe6069e4e7f47bb4cd32ae2b813e">osStatus_t</a> status;</div>
 962 <div class="line"> </div>
 963 <div class="line">  status = <a class="code hl_function" href="group__CMSIS__RTOS__KernelCtrl.html#ga2065364d1bc805a40e749430377df1e1">osKernelDestroyClass</a>(4U, <a class="code hl_define" href="group__CMSIS__RTOS__Definitions.html#ga7abd2d95425d9e02672778b3464b2eaa">osSafetyWithSameClass</a> | <a class="code hl_define" href="group__CMSIS__RTOS__Definitions.html#ga8c77ee126b9215425fc004ee13cdc6de">osSafetyWithLowerClass</a>); <span class="comment">// Destroy objects with safety class 4 or lower</span></div>
 964 <div class="line">  <span class="comment">// verify status value here.</span></div>
 965 <div class="line">}</div>
 966 <div class="ttc" id="agroup__CMSIS__RTOS__Definitions_html_ga7abd2d95425d9e02672778b3464b2eaa"><div class="ttname"><a href="group__CMSIS__RTOS__Definitions.html#ga7abd2d95425d9e02672778b3464b2eaa">osSafetyWithSameClass</a></div><div class="ttdeci">#define osSafetyWithSameClass</div><div class="ttdoc">Objects with same safety class.</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:232</div></div>
 967 <div class="ttc" id="agroup__CMSIS__RTOS__Definitions_html_ga8c77ee126b9215425fc004ee13cdc6de"><div class="ttname"><a href="group__CMSIS__RTOS__Definitions.html#ga8c77ee126b9215425fc004ee13cdc6de">osSafetyWithLowerClass</a></div><div class="ttdeci">#define osSafetyWithLowerClass</div><div class="ttdoc">Objects with lower safety class.</div><div class="ttdef"><b>Definition:</b> cmsis_os2.h:233</div></div>
 968 <div class="ttc" id="agroup__CMSIS__RTOS__KernelCtrl_html_ga2065364d1bc805a40e749430377df1e1"><div class="ttname"><a href="group__CMSIS__RTOS__KernelCtrl.html#ga2065364d1bc805a40e749430377df1e1">osKernelDestroyClass</a></div><div class="ttdeci">osStatus_t osKernelDestroyClass(uint32_t safety_class, uint32_t mode)</div><div class="ttdoc">Destroy objects for specified safety classes.</div></div>
 969 </div><!-- fragment -->
 970 </div>
 971 </div>
 972 <a id="ga91b400b21a9093f7751fc45613c12110" name="ga91b400b21a9093f7751fc45613c12110"></a>
 973 <h2 class="memtitle"><span class="permalink"><a href="#ga91b400b21a9093f7751fc45613c12110">&#9670;&#160;</a></span>osFaultResume()</h2>
 974
 975 <div class="memitem">
 976 <div class="memproto">
 977       <table class="memname">
 978         <tr>
 979           <td class="memname">void osFaultResume </td>
 980           <td>(</td>
 981           <td class="paramtype">void&#160;</td>
 982           <td class="paramname"></td><td>)</td>
 983           <td></td>
 984         </tr>
 985       </table>
 986 </div><div class="memdoc">
 987 <p>Resume normal RTOS operation when exiting exception faults.</p>
 988 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><span class="keywordtype">void</span> HardFault_Handler (<span class="keywordtype">void</span>) {</div>
 989 <div class="line">  __ASM <span class="keyword">volatile</span> (</div>
 990 <div class="line">    <span class="stringliteral">&quot;...                          \n\t&quot;</span> <span class="comment">// Enter assembly and handle faults</span></div>
 991 <div class="line">    <span class="stringliteral">&quot;...                          \n\t&quot;</span></div>
 992 <div class="line">    <span class="stringliteral">&quot;ldr  r0,=osFaultResume       \n\t&quot;</span> <span class="comment">// Before exiting the handler load and</span></div>
 993 <div class="line">    <span class="stringliteral">&quot;bx   r0                      \n\t&quot;</span> <span class="comment">// jump to osFaultResume</span></div>
 994 <div class="line">  );</div>
 995 <div class="line">}</div>
 996 </div><!-- fragment -->
 997 </div>
 998 </div>
 999 </div><!-- contents -->
1000 </div><!-- doc-content -->
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