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+<title>Message Queue Management</title>
+<title>CMSIS-RTOS RTX: Message Queue Management</title>
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+ <td style="padding-left: 0.5em;">
+ <div id="projectname">CMSIS-RTOS RTX
+ &#160;<span id="projectnumber">Version 4.80</span>
+ </div>
+ <div id="projectbrief">CMSIS-RTOS RTX: Real-Time Operating System for Cortex-M processor-based devices</div>
+ </td>
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+<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark">&#160;</span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark">&#160;</span>Data Structures</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark">&#160;</span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark">&#160;</span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark">&#160;</span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark">&#160;</span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark">&#160;</span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark">&#160;</span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark">&#160;</span>Macros</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(9)"><span class="SelectionMark">&#160;</span>Groups</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(10)"><span class="SelectionMark">&#160;</span>Pages</a></div>
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+
+<div class="header">
+ <div class="summary">
+<a href="#define-members">Macros</a> &#124;
+<a href="#func-members">Functions</a> </div>
+ <div class="headertitle">
+<div class="title">Message Queue Management</div> </div>
+<div class="ingroups"><a class="el" href="group___c_m_s_i_s___r_t_o_s.html">CMSIS-RTOS API (RTX)</a></div></div><!--header-->
+<div class="contents">
+
+<p>Control, send, receive, or wait for messages.
+<a href="#details">More...</a></p>
+<table class="memberdecls">
+<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
+Macros</h2></td></tr>
+<tr class="memitem:ga479a6561f859e3d4818e25708593d203"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#ga479a6561f859e3d4818e25708593d203">osFeature_MessageQ</a>&#160;&#160;&#160;1</td></tr>
+<tr class="memdesc:ga479a6561f859e3d4818e25708593d203"><td class="mdescLeft">&#160;</td><td class="mdescRight">Message Queues available. <a href="#ga479a6561f859e3d4818e25708593d203"></a><br/></td></tr>
+<tr class="separator:ga479a6561f859e3d4818e25708593d203"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:gac9a6a6276c12609793e7701afcc82326"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#gac9a6a6276c12609793e7701afcc82326">osMessageQDef</a>(name, queue_sz, type)</td></tr>
+<tr class="memdesc:gac9a6a6276c12609793e7701afcc82326"><td class="mdescLeft">&#160;</td><td class="mdescRight">Create a Message Queue Definition. <a href="#gac9a6a6276c12609793e7701afcc82326"></a><br/></td></tr>
+<tr class="separator:gac9a6a6276c12609793e7701afcc82326"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ga2d446a0b4bb90bf05d6f92eedeaabc97"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#ga2d446a0b4bb90bf05d6f92eedeaabc97">osMessageQ</a>(name)&#160;&#160;&#160;&amp;os_messageQ_def_##name</td></tr>
+<tr class="memdesc:ga2d446a0b4bb90bf05d6f92eedeaabc97"><td class="mdescLeft">&#160;</td><td class="mdescRight">Access a Message Queue Definition. <a href="#ga2d446a0b4bb90bf05d6f92eedeaabc97"></a><br/></td></tr>
+<tr class="separator:ga2d446a0b4bb90bf05d6f92eedeaabc97"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table><table class="memberdecls">
+<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
+Functions</h2></td></tr>
+<tr class="memitem:gaf3b9345cf426304d46565152bc26fb78"><td class="memItemLeft" align="right" valign="top"><a class="el" href="cmsis__os_8h.html#ad9ec70c32c6c521970636b521e12d17f">osMessageQId</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#gaf3b9345cf426304d46565152bc26fb78">osMessageCreate</a> (const <a class="el" href="structos_message_q_def__t.html">osMessageQDef_t</a> *queue_def, <a class="el" href="cmsis__os_8h.html#adfeb153a84a81309e2d958268197617f">osThreadId</a> thread_id)</td></tr>
+<tr class="memdesc:gaf3b9345cf426304d46565152bc26fb78"><td class="mdescLeft">&#160;</td><td class="mdescRight">Create and Initialize a Message Queue. <a href="#gaf3b9345cf426304d46565152bc26fb78"></a><br/></td></tr>
+<tr class="separator:gaf3b9345cf426304d46565152bc26fb78"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:gac0dcf462fc92de8ffaba6cc004514a6d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group___c_m_s_i_s___r_t_o_s___status.html#gae2e091fefc4c767117727bd5aba4d99e">osStatus</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#gac0dcf462fc92de8ffaba6cc004514a6d">osMessagePut</a> (<a class="el" href="cmsis__os_8h.html#ad9ec70c32c6c521970636b521e12d17f">osMessageQId</a> queue_id, uint32_t info, uint32_t millisec)</td></tr>
+<tr class="memdesc:gac0dcf462fc92de8ffaba6cc004514a6d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Put a Message to a Queue. <a href="#gac0dcf462fc92de8ffaba6cc004514a6d"></a><br/></td></tr>
+<tr class="separator:gac0dcf462fc92de8ffaba6cc004514a6d"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ga6c6892b8f2296cca6becd57ca2d7e1ae"><td class="memItemLeft" align="right" valign="top"><a class="el" href="cmsis__os_8h.html#ac6b67612d20f480bef2d76bb64e95be8">os_InRegs</a> <a class="el" href="group___c_m_s_i_s___r_t_o_s___definitions.html#structos_event">osEvent</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#ga6c6892b8f2296cca6becd57ca2d7e1ae">osMessageGet</a> (<a class="el" href="cmsis__os_8h.html#ad9ec70c32c6c521970636b521e12d17f">osMessageQId</a> queue_id, uint32_t millisec)</td></tr>
+<tr class="memdesc:ga6c6892b8f2296cca6becd57ca2d7e1ae"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get a Message or Wait for a Message from a Queue. <a href="#ga6c6892b8f2296cca6becd57ca2d7e1ae"></a><br/></td></tr>
+<tr class="separator:ga6c6892b8f2296cca6becd57ca2d7e1ae"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table>
+<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
+<p>Message Queue Management functions allow to control, send, receive, or wait for messages. A message can be an integer or pointer value that is send to a thread or interrupt service routine.</p>
+<div class="image">
+<img src="MessageQueue.png" alt="MessageQueue.png"/>
+<div class="caption">
+CMSIS-RTOS Message Queue</div></div>
+<h2 class="groupheader">Macro Definition Documentation</h2>
+<a class="anchor" id="ga479a6561f859e3d4818e25708593d203"></a>
+<div class="memitem">
+<div class="memproto">
+ <table class="memname">
+ <tr>
+ <td class="memname">#define osFeature_MessageQ&#160;&#160;&#160;1</td>
+ </tr>
+ </table>
+</div><div class="memdoc">
+<p>CMSIS-RTOS RTX supports message queues. </p>
+
+</div>
+</div>
+<a class="anchor" id="ga2d446a0b4bb90bf05d6f92eedeaabc97"></a>
+<div class="memitem">
+<div class="memproto">
+ <table class="memname">
+ <tr>
+ <td class="memname">#define osMessageQ</td>
+ <td>(</td>
+ <td class="paramtype">&#160;</td>
+ <td class="paramname">name</td><td>)</td>
+ <td>&#160;&#160;&#160;&amp;os_messageQ_def_##name</td>
+ </tr>
+ </table>
+</div><div class="memdoc">
+<p>Access to the message queue definition for the function <a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#gaf3b9345cf426304d46565152bc26fb78">osMessageCreate</a>.</p>
+<dl class="params"><dt>Parameters</dt><dd>
+ <table class="params">
+ <tr><td class="paramname">name</td><td>name of the queue </td></tr>
+ </table>
+ </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="gac9a6a6276c12609793e7701afcc82326"></a>
+<div class="memitem">
+<div class="memproto">
+ <table class="memname">
+ <tr>
+ <td class="memname">#define osMessageQDef</td>
+ <td>(</td>
+ <td class="paramtype">&#160;</td>
+ <td class="paramname">name, </td>
+ </tr>
+ <tr>
+ <td class="paramkey"></td>
+ <td></td>
+ <td class="paramtype">&#160;</td>
+ <td class="paramname">queue_sz, </td>
+ </tr>
+ <tr>
+ <td class="paramkey"></td>
+ <td></td>
+ <td class="paramtype">&#160;</td>
+ <td class="paramname">type&#160;</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>)</td>
+ <td></td><td></td>
+ </tr>
+ </table>
+</div><div class="memdoc">
+<p>Define the attributes of a message queue created by the function <a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#gaf3b9345cf426304d46565152bc26fb78">osMessageCreate</a> using <a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#ga2d446a0b4bb90bf05d6f92eedeaabc97">osMessageQ</a>.</p>
+<dl class="section note"><dt>Note</dt><dd>The parameter <em>thread</em> registers the receiving thread for a message and is needed for the general <a class="el" href="_technical_data.html#osWait">osWait</a> function to deliver the message.</dd></dl>
+<dl class="params"><dt>Parameters</dt><dd>
+ <table class="params">
+ <tr><td class="paramname">name</td><td>name of the queue. </td></tr>
+ <tr><td class="paramname">queue_sz</td><td>maximum number of messages in the queue. </td></tr>
+ <tr><td class="paramname">type</td><td>data type of a single message element (for debugger). </td></tr>
+ </table>
+ </dd>
+</dl>
+
+</div>
+</div>
+<h2 class="groupheader">Function Documentation</h2>
+<a class="anchor" id="gaf3b9345cf426304d46565152bc26fb78"></a>
+<div class="memitem">
+<div class="memproto">
+ <table class="memname">
+ <tr>
+ <td class="memname"><a class="el" href="cmsis__os_8h.html#ad9ec70c32c6c521970636b521e12d17f">osMessageQId</a> osMessageCreate </td>
+ <td>(</td>
+ <td class="paramtype">const <a class="el" href="structos_message_q_def__t.html">osMessageQDef_t</a> *&#160;</td>
+ <td class="paramname"><em>queue_def</em>, </td>
+ </tr>
+ <tr>
+ <td class="paramkey"></td>
+ <td></td>
+ <td class="paramtype"><a class="el" href="cmsis__os_8h.html#adfeb153a84a81309e2d958268197617f">osThreadId</a>&#160;</td>
+ <td class="paramname"><em>thread_id</em>&#160;</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>)</td>
+ <td></td><td></td>
+ </tr>
+ </table>
+</div><div class="memdoc">
+<dl class="params"><dt>Parameters</dt><dd>
+ <table class="params">
+ <tr><td class="paramdir">[in]</td><td class="paramname">queue_def</td><td>queue definition referenced with <a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#ga2d446a0b4bb90bf05d6f92eedeaabc97">osMessageQ</a>. </td></tr>
+ <tr><td class="paramdir">[in]</td><td class="paramname">thread_id</td><td>thread ID (obtained by <a class="el" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gac59b5713cb083702dce759c73fd90dff">osThreadCreate</a> or <a class="el" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gab1df2a28925862ef8f9cf4e1c995c5a7">osThreadGetId</a>) or NULL. </td></tr>
+ </table>
+ </dd>
+</dl>
+<dl class="section return"><dt>Returns</dt><dd>message queue ID for reference by other functions or NULL in case of error.</dd></dl>
+<p>Create and initialize a message queue.</p>
+<dl class="section note"><dt>Note</dt><dd>Cannot be called from <a class="el" href="_function_overview.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a>.</dd></dl>
+<p><b>Example</b> </p>
+<div class="fragment"><div class="line"><span class="preprocessor">#include &quot;<a class="code" href="cmsis__os_8h.html">cmsis_os.h</a>&quot;</span></div>
+<div class="line"> </div>
+<div class="line"><a class="code" href="cmsis__os_8h.html#adfeb153a84a81309e2d958268197617f" title="Thread ID identifies the thread (pointer to a thread control block).">osThreadId</a> tid_thread1; <span class="comment">// ID for thread 1</span></div>
+<div class="line"><a class="code" href="cmsis__os_8h.html#adfeb153a84a81309e2d958268197617f" title="Thread ID identifies the thread (pointer to a thread control block).">osThreadId</a> tid_thread2; <span class="comment">// for thread 2</span></div>
+<div class="line"> </div>
+<div class="line"><span class="keyword">typedef</span> <span class="keyword">struct </span>{ <span class="comment">// Message object structure</span></div>
+<div class="line"> <span class="keywordtype">float</span> voltage; <span class="comment">// AD result of measured voltage</span></div>
+<div class="line"> <span class="keywordtype">float</span> current; <span class="comment">// AD result of measured current</span></div>
+<div class="line"> <span class="keywordtype">int</span> counter; <span class="comment">// A counter value</span></div>
+<div class="line">} T_MEAS;</div>
+<div class="line"> </div>
+<div class="line"><a class="code" href="group___c_m_s_i_s___r_t_o_s___pool_mgmt.html#ga87b471d4fe2d5dbd0040708edd52771b" title="Define a Memory Pool.">osPoolDef</a>(mpool, 16, T_MEAS); <span class="comment">// Define memory pool</span></div>
+<div class="line"><a class="code" href="cmsis__os_8h.html#a08d2e20fd9bbd96220fe068d420f3686" title="Pool ID identifies the memory pool (pointer to a memory pool control block).">osPoolId</a> mpool;</div>
+<div class="line"><a class="code" href="group___c_m_s_i_s___r_t_o_s___message.html#gac9a6a6276c12609793e7701afcc82326" title="Create a Message Queue Definition.">osMessageQDef</a>(MsgBox, 16, T_MEAS); <span class="comment">// Define message queue</span></div>
+<div class="line"><a class="code" href="cmsis__os_8h.html#ad9ec70c32c6c521970636b521e12d17f" title="Message ID identifies the message queue (pointer to a message queue control block).">osMessageQId</a> MsgBox;</div>
+<div class="line"> </div>
+<div class="line"><span class="keywordtype">void</span> send_thread (<span class="keywordtype">void</span> <span class="keyword">const</span> *argument); <span class="comment">// forward reference</span></div>
+<div class="line"><span class="keywordtype">void</span> recv_thread (<span class="keywordtype">void</span> <span class="keyword">const</span> *argument); <span class="comment">// forward reference</span></div>
+<div class="line"> <span class="comment">// Thread definitions</span></div>
+<div class="line"><a class="code" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gaee93d929beb350f16e5cc7fa602e229f" title="Create a Thread Definition with function, priority, and stack requirements.">osThreadDef</a>(send_thread, <a class="code" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#ga7f2b42f1983b9107775ec2a1c69a849aa45a2895ad30c79fb97de18cac7cc19f1" title="priority: normal (default)">osPriorityNormal</a>, 1, 0);</div>
+<div class="line"><a class="code" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gaee93d929beb350f16e5cc7fa602e229f" title="Create a Thread Definition with function, priority, and stack requirements.">osThreadDef</a>(recv_thread, <a class="code" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#ga7f2b42f1983b9107775ec2a1c69a849aa45a2895ad30c79fb97de18cac7cc19f1" title="priority: normal (default)">osPriorityNormal</a>, 1, 2000);</div>
+<div class="line"> </div>
+<div class="line"><span class="comment">//</span></div>
+<div class="line"><span class="comment">// Thread 1: Send thread</span></div>
+<div class="line"><span class="comment">//</span></div>
+<div class="line"><span class="keywordtype">void</span> send_thread (<span class="keywordtype">void</span> <span class="keyword">const</span> *argument) {</div>
+<div class="line"> T_MEAS *mptr;</div>
+<div class="line"> </div>
+<div class="line"> mptr = <a class="code" href="group___c_m_s_i_s___r_t_o_s___pool_mgmt.html#gaa0b2994f1a866c19e0d11e6e0d44f543" title="Allocate a memory block from a memory pool.">osPoolAlloc</a>(mpool); <span class="comment">// Allocate memory for the message</span></div>
+<div class="line"> mptr-&gt;voltage = 223.72; <span class="comment">// Set the message content</span></div>
+<div class="line"> mptr-&gt;current = 17.54;</div>
+<div class="line"> mptr-&gt;counter = 120786;</div>
+<div class="line"> <a class="code" href="group___c_m_s_i_s___r_t_o_s___message.html#gac0dcf462fc92de8ffaba6cc004514a6d" title="Put a Message to a Queue.">osMessagePut</a>(MsgBox, (uint32_t)mptr, <a class="code" href="cmsis__os_8h.html#a9eb9a7a797a42e4b55eb171ecc609ddb" title="Timeout value.">osWaitForever</a>); <span class="comment">// Send Message</span></div>
+<div class="line"> <a class="code" href="group___c_m_s_i_s___r_t_o_s___wait.html#ga02e19d5e723bfb06ba9324d625162255" title="Wait for Timeout (Time Delay).">osDelay</a>(100);</div>
+<div class="line"> </div>
+<div class="line"> mptr = <a class="code" href="group___c_m_s_i_s___r_t_o_s___pool_mgmt.html#gaa0b2994f1a866c19e0d11e6e0d44f543" title="Allocate a memory block from a memory pool.">osPoolAlloc</a>(mpool); <span class="comment">// Allocate memory for the message</span></div>
+<div class="line"> mptr-&gt;voltage = 227.23; <span class="comment">// Prepare a 2nd message</span></div>
+<div class="line"> mptr-&gt;current = 12.41;</div>
+<div class="line"> mptr-&gt;counter = 170823;</div>
+<div class="line"> <a class="code" href="group___c_m_s_i_s___r_t_o_s___message.html#gac0dcf462fc92de8ffaba6cc004514a6d" title="Put a Message to a Queue.">osMessagePut</a>(MsgBox, (uint32_t)mptr, <a class="code" href="cmsis__os_8h.html#a9eb9a7a797a42e4b55eb171ecc609ddb" title="Timeout value.">osWaitForever</a>); <span class="comment">// Send Message</span></div>
+<div class="line"> <a class="code" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gaf13a667493c5d629a90c13e113b99233" title="Pass control to next thread that is in state READY.">osThreadYield</a>(); <span class="comment">// Cooperative multitasking</span></div>
+<div class="line"> <span class="comment">// We are done here, exit this thread</span></div>
+<div class="line">}</div>
+<div class="line"> </div>
+<div class="line"><span class="comment">//</span></div>
+<div class="line"><span class="comment">// Thread 2: Receive thread</span></div>
+<div class="line"><span class="comment">//</span></div>
+<div class="line"><span class="keywordtype">void</span> recv_thread (<span class="keywordtype">void</span> <span class="keyword">const</span> *argument) {</div>
+<div class="line"> T_MEAS *rptr;</div>
+<div class="line"> <a class="code" href="group___c_m_s_i_s___r_t_o_s___definitions.html#structos_event" title="Event structure contains detailed information about an event.">osEvent</a> evt;</div>
+<div class="line"> </div>
+<div class="line"> <span class="keywordflow">for</span> (;;) {</div>
+<div class="line"> evt = <a class="code" href="group___c_m_s_i_s___r_t_o_s___message.html#ga6c6892b8f2296cca6becd57ca2d7e1ae" title="Get a Message or Wait for a Message from a Queue.">osMessageGet</a>(MsgBox, <a class="code" href="cmsis__os_8h.html#a9eb9a7a797a42e4b55eb171ecc609ddb" title="Timeout value.">osWaitForever</a>); <span class="comment">// wait for message</span></div>
+<div class="line"> <span class="keywordflow">if</span> (evt.<a class="code" href="group___c_m_s_i_s___r_t_o_s___definitions.html#ad477a289f1f03ac45407b64268d707d3" title="status code: event or error information">status</a> == <a class="code" href="group___c_m_s_i_s___r_t_o_s___status.html#gae2e091fefc4c767117727bd5aba4d99ead604f3673359dd4ac643b16dc5a2c342" title="function completed; message event occurred.">osEventMessage</a>) {</div>
+<div class="line"> rptr = evt.<a class="code" href="group___c_m_s_i_s___r_t_o_s___definitions.html#a0b9f8fd3645f01d8cb09cae82add2d7f" title="event value">value</a>.<a class="code" href="group___c_m_s_i_s___r_t_o_s___definitions.html#a117104b82864d3b23ec174af6d392709" title="message or mail as void pointer">p</a>;</div>
+<div class="line"> printf (<span class="stringliteral">&quot;\nVoltage: %.2f V\n&quot;</span>, rptr-&gt;voltage);</div>
+<div class="line"> printf (<span class="stringliteral">&quot;Current: %.2f A\n&quot;</span>, rptr-&gt;current);</div>
+<div class="line"> printf (<span class="stringliteral">&quot;Number of cycles: %d\n&quot;</span>, rptr-&gt;counter);</div>
+<div class="line"> <a class="code" href="group___c_m_s_i_s___r_t_o_s___pool_mgmt.html#ga4a861e9c469c9d0daf5721bf174f8e54" title="Return an allocated memory block back to a specific memory pool.">osPoolFree</a>(mpool, rptr); <span class="comment">// free memory allocated for message</span></div>
+<div class="line"> }</div>
+<div class="line"> }</div>
+<div class="line">}</div>
+<div class="line"> </div>
+<div class="line"><span class="keywordtype">void</span> StartApplication (<span class="keywordtype">void</span>) {</div>
+<div class="line"> mpool = <a class="code" href="group___c_m_s_i_s___r_t_o_s___pool_mgmt.html#ga34af5c4f4ab38f4138ea7f1f9ece3a1a" title="Create and Initialize a memory pool.">osPoolCreate</a>(<a class="code" href="group___c_m_s_i_s___r_t_o_s___pool_mgmt.html#ga5f0b204a82327533d420210125c90697" title="Access a Memory Pool definition.">osPool</a>(mpool)); <span class="comment">// create memory pool</span></div>
+<div class="line"> MsgBox = <a class="code" href="group___c_m_s_i_s___r_t_o_s___message.html#gaf3b9345cf426304d46565152bc26fb78" title="Create and Initialize a Message Queue.">osMessageCreate</a>(<a class="code" href="group___c_m_s_i_s___r_t_o_s___message.html#ga2d446a0b4bb90bf05d6f92eedeaabc97" title="Access a Message Queue Definition.">osMessageQ</a>(MsgBox), NULL); <span class="comment">// create msg queue</span></div>
+<div class="line"> </div>
+<div class="line"> tid_thread1 = <a class="code" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gac59b5713cb083702dce759c73fd90dff" title="Create a thread and add it to Active Threads and set it to state READY.">osThreadCreate</a>(<a class="code" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gaf0c7c6b5e09f8be198312144b5c9e453" title="Access a Thread definition.">osThread</a>(send_thread), NULL);</div>
+<div class="line"> tid_thread2 = <a class="code" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gac59b5713cb083702dce759c73fd90dff" title="Create a thread and add it to Active Threads and set it to state READY.">osThreadCreate</a>(<a class="code" href="group___c_m_s_i_s___r_t_o_s___thread_mgmt.html#gaf0c7c6b5e09f8be198312144b5c9e453" title="Access a Thread definition.">osThread</a>(recv_thread), NULL);</div>
+<div class="line"> :</div>
+<div class="line">}</div>
+</div><!-- fragment -->
+</div>
+</div>
+<a class="anchor" id="ga6c6892b8f2296cca6becd57ca2d7e1ae"></a>
+<div class="memitem">
+<div class="memproto">
+ <table class="memname">
+ <tr>
+ <td class="memname"><a class="el" href="group___c_m_s_i_s___r_t_o_s___definitions.html#structos_event">osEvent</a> osMessageGet </td>
+ <td>(</td>
+ <td class="paramtype"><a class="el" href="cmsis__os_8h.html#ad9ec70c32c6c521970636b521e12d17f">osMessageQId</a>&#160;</td>
+ <td class="paramname"><em>queue_id</em>, </td>
+ </tr>
+ <tr>
+ <td class="paramkey"></td>
+ <td></td>
+ <td class="paramtype">uint32_t&#160;</td>
+ <td class="paramname"><em>millisec</em>&#160;</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>)</td>
+ <td></td><td></td>
+ </tr>
+ </table>
+</div><div class="memdoc">
+<dl class="params"><dt>Parameters</dt><dd>
+ <table class="params">
+ <tr><td class="paramdir">[in]</td><td class="paramname">queue_id</td><td>message queue ID obtained with <a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#gaf3b9345cf426304d46565152bc26fb78">osMessageCreate</a>. </td></tr>
+ <tr><td class="paramdir">[in]</td><td class="paramname">millisec</td><td><a class="el" href="_function_overview.html#CMSIS_RTOS_TimeOutValue">Timout Value</a> or 0 in case of no time-out. </td></tr>
+ </table>
+ </dd>
+</dl>
+<dl class="section return"><dt>Returns</dt><dd>event information that includes status code.</dd></dl>
+<p>Suspend the execution of the current <b>RUNNING</b> thread until a message arrives. When a message is already in the queue, the function returns instantly with the message information.</p>
+<p>The argument <em>millisec</em> specifies how long the system waits for a message to become available. While the system waits the thread that is calling this function is put into the state <b>WAITING</b>. The <em>millisec</em> timeout value can have the following values:</p>
+<ul>
+<li>when <em>millisec</em> is 0, the function returns instantly.</li>
+<li>when <em>millisec</em> is set to <b>osWaitForever</b> the function will wait for an infinite time until a message arrives.</li>
+<li>all other values specify a time in millisecond for a timeout.</li>
+</ul>
+<dl class="section note"><dt>Note</dt><dd>The parameter <em>millisec</em> must be 0 for using this function in an ISR.</dd></dl>
+<p><b><a class="el" href="group___c_m_s_i_s___r_t_o_s___status.html">Status and Error Codes</a></b><br/>
+</p>
+<ul>
+<li><em>osOK:</em> no message is available in the queue and no timeout was specified.</li>
+<li><em>osEventTimeout:</em> no message has arrived during the given timeout period.</li>
+<li><em>osEventMessage:</em> message received, <em>value.p</em> contains the pointer to message.</li>
+<li><em>osErrorParameter:</em> a parameter is invalid or outside of a permitted range.</li>
+</ul>
+<dl class="section note"><dt>Note</dt><dd><a class="el" href="_function_overview.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a> can call this function. </dd></dl>
+
+</div>
+</div>
+<a class="anchor" id="gac0dcf462fc92de8ffaba6cc004514a6d"></a>
+<div class="memitem">
+<div class="memproto">
+ <table class="memname">
+ <tr>
+ <td class="memname"><a class="el" href="group___c_m_s_i_s___r_t_o_s___status.html#gae2e091fefc4c767117727bd5aba4d99e">osStatus</a> osMessagePut </td>
+ <td>(</td>
+ <td class="paramtype"><a class="el" href="cmsis__os_8h.html#ad9ec70c32c6c521970636b521e12d17f">osMessageQId</a>&#160;</td>
+ <td class="paramname"><em>queue_id</em>, </td>
+ </tr>
+ <tr>
+ <td class="paramkey"></td>
+ <td></td>
+ <td class="paramtype">uint32_t&#160;</td>
+ <td class="paramname"><em>info</em>, </td>
+ </tr>
+ <tr>
+ <td class="paramkey"></td>
+ <td></td>
+ <td class="paramtype">uint32_t&#160;</td>
+ <td class="paramname"><em>millisec</em>&#160;</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>)</td>
+ <td></td><td></td>
+ </tr>
+ </table>
+</div><div class="memdoc">
+<dl class="params"><dt>Parameters</dt><dd>
+ <table class="params">
+ <tr><td class="paramdir">[in]</td><td class="paramname">queue_id</td><td>message queue ID obtained with <a class="el" href="group___c_m_s_i_s___r_t_o_s___message.html#gaf3b9345cf426304d46565152bc26fb78">osMessageCreate</a>. </td></tr>
+ <tr><td class="paramdir">[in]</td><td class="paramname">info</td><td>message information. </td></tr>
+ <tr><td class="paramdir">[in]</td><td class="paramname">millisec</td><td><a class="el" href="_function_overview.html#CMSIS_RTOS_TimeOutValue">Timout Value</a> or 0 in case of no time-out. </td></tr>
+ </table>
+ </dd>
+</dl>
+<dl class="section return"><dt>Returns</dt><dd>status code that indicates the execution status of the function.</dd></dl>
+<p>Put the message <em>info</em> in a message queue specified by <em>queue_id</em>.</p>
+<p>When the message queue is full, the system retries for a specified time with <em>millisec</em>. While the system retries the thread that is calling this function is put into the state <b>WAITING</b>. The <em>millisec</em> timeout can have the following values:</p>
+<ul>
+<li>when <em>millisec</em> is 0, the function returns instantly.</li>
+<li>when <em>millisec</em> is set to <b>osWaitForever</b> the function will wait for an infinite time until a message queue slot becomes available.</li>
+<li>all other values specify a time in millisecond for a timeout.</li>
+</ul>
+<dl class="section note"><dt>Note</dt><dd>The parameter <em>millisec</em> must be 0 for using this function in an ISR.</dd></dl>
+<p><b><a class="el" href="group___c_m_s_i_s___r_t_o_s___status.html">Status and Error Codes</a></b><br/>
+</p>
+<ul>
+<li><em>osOK:</em> the message is put into the queue.</li>
+<li><em>osErrorResource:</em> no memory in the queue was available.</li>
+<li><em>osErrorTimeoutResource:</em> no memory in the queue was available during the given time limit.</li>
+<li><em>osErrorParameter:</em> a parameter is invalid or outside of a permitted range.</li>
+</ul>
+<dl class="section note"><dt>Note</dt><dd><a class="el" href="_function_overview.html#CMSIS_RTOS_ISR_Calls">Interrupt Service Routines</a> can call this function. </dd></dl>
+
+</div>
+</div>
+</div><!-- contents -->
+</div><!-- doc-content -->
+<!-- start footer part -->
+<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
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+ <li class="footer">Generated on Tue Oct 27 2015 14:35:45 for CMSIS-RTOS RTX by ARM Ltd. All rights reserved.
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