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<h1>evtimer.c</h1> </div>
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<a href="evtimer_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
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<a name="l00002"></a>00002 <span class="comment"> ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.</span>
<a name="l00003"></a>00003 <span class="comment"></span>
<a name="l00004"></a>00004 <span class="comment"> This file is part of ChibiOS/RT.</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> ChibiOS/RT is free software; you can redistribute it and/or modify</span>
<a name="l00007"></a>00007 <span class="comment"> it under the terms of the GNU General Public License as published by</span>
<a name="l00008"></a>00008 <span class="comment"> the Free Software Foundation; either version 3 of the License, or</span>
<a name="l00009"></a>00009 <span class="comment"> (at your option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment"></span>
<a name="l00011"></a>00011 <span class="comment"> ChibiOS/RT is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00014"></a>00014 <span class="comment"> GNU General Public License for more details.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment"> You should have received a copy of the GNU General Public License</span>
<a name="l00017"></a>00017 <span class="comment"> along with this program. If not, see &lt;http://www.gnu.org/licenses/&gt;.</span>
<a name="l00018"></a>00018 <span class="comment"></span>
<a name="l00019"></a>00019 <span class="comment"> ---</span>
<a name="l00020"></a>00020 <span class="comment"></span>
<a name="l00021"></a>00021 <span class="comment"> A special exception to the GPL can be applied should you wish to distribute</span>
<a name="l00022"></a>00022 <span class="comment"> a combined work that includes ChibiOS/RT, without being obliged to provide</span>
<a name="l00023"></a>00023 <span class="comment"> the source code for any proprietary components. See the file exception.txt</span>
<a name="l00024"></a>00024 <span class="comment"> for full details of how and when the exception can be applied.</span>
<a name="l00025"></a>00025 <span class="comment">*/</span>
<a name="l00026"></a>00026 <span class="comment"></span>
<a name="l00027"></a>00027 <span class="comment">/**</span>
<a name="l00028"></a>00028 <span class="comment"> * @file evtimer.c</span>
<a name="l00029"></a>00029 <span class="comment"> * @brief Events Generator Timer code.</span>
<a name="l00030"></a>00030 <span class="comment"> * @addtogroup event_timer</span>
<a name="l00031"></a>00031 <span class="comment"> * @{</span>
<a name="l00032"></a>00032 <span class="comment"> */</span>
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="preprocessor">#include &quot;<a class="code" href="ch_8h.html" title="ChibiOS/RT main include file.">ch.h</a>&quot;</span>
<a name="l00035"></a>00035 <span class="preprocessor">#include &quot;<a class="code" href="evtimer_8h.html" title="Events Generator Timer structures and macros.">evtimer.h</a>&quot;</span>
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="keyword">static</span> <span class="keywordtype">void</span> tmrcb(<span class="keywordtype">void</span> *p) {
<a name="l00038"></a>00038 <a class="code" href="struct_ev_timer.html" title="Event timer structure.">EvTimer</a> *etp = p;
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <a class="code" href="group__events.html#gaa24d9bed5b676b577200c4a8ebe3b8a3" title="Signals all the Event Listeners registered on the specified Event Source.">chEvtBroadcastI</a>(&amp;etp-&gt;et_es);
<a name="l00041"></a>00041 <a class="code" href="group__time.html#ga1c44c3a0bc64b2954d95cd98b2e7124e" title="Enables a virtual timer.">chVTSetI</a>(&amp;etp-&gt;et_vt, etp-&gt;et_interval, tmrcb, etp);
<a name="l00042"></a>00042 }
<a name="l00043"></a>00043 <span class="comment"></span>
<a name="l00044"></a>00044 <span class="comment">/**</span>
<a name="l00045"></a>00045 <span class="comment"> * @brief Starts the timer</span>
<a name="l00046"></a>00046 <span class="comment"> * @details If the timer was already running then the function has no effect.</span>
<a name="l00047"></a>00047 <span class="comment"> *</span>
<a name="l00048"></a>00048 <span class="comment"> * @param etp pointer to an initialized @p EvTimer structure.</span>
<a name="l00049"></a>00049 <span class="comment"> */</span>
<a name="l00050"></a>00050 <span class="keywordtype">void</span> <a class="code" href="group__event__timer.html#gaa58fe826b42e0d64f32b6a40f54bb430" title="Starts the timer.">evtStart</a>(<a class="code" href="struct_ev_timer.html" title="Event timer structure.">EvTimer</a> *etp) {
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <a class="code" href="group__system.html#ga9f6573c0763d1e4e97c63c62edad6e42" title="Enters the kernel lock mode.">chSysLock</a>();
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="keywordflow">if</span> (!<a class="code" href="group__time.html#gae54e6dd40bc7b9cdeb409393ec9e134a" title="Returns TRUE if the speciified timer is armed.">chVTIsArmedI</a>(&amp;etp-&gt;et_vt))
<a name="l00055"></a>00055 <a class="code" href="group__time.html#ga1c44c3a0bc64b2954d95cd98b2e7124e" title="Enables a virtual timer.">chVTSetI</a>(&amp;etp-&gt;et_vt, etp-&gt;et_interval, tmrcb, etp);
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <a class="code" href="group__system.html#ga5a257fa58a09815eb64a45e2dfbdc22e" title="Leaves the kernel lock mode.">chSysUnlock</a>();
<a name="l00058"></a>00058 }
<a name="l00059"></a>00059 <span class="comment"></span>
<a name="l00060"></a>00060 <span class="comment">/**</span>
<a name="l00061"></a>00061 <span class="comment"> * @brief Stops the timer.</span>
<a name="l00062"></a>00062 <span class="comment"> * @details If the timer was already stopped then the function has no effect.</span>
<a name="l00063"></a>00063 <span class="comment"> *</span>
<a name="l00064"></a>00064 <span class="comment"> * @param etp pointer to an initialized @p EvTimer structure.</span>
<a name="l00065"></a>00065 <span class="comment"> */</span>
<a name="l00066"></a>00066 <span class="keywordtype">void</span> <a class="code" href="group__event__timer.html#ga667900146fd2bc35721e072ae5b0e433" title="Stops the timer.">evtStop</a>(<a class="code" href="struct_ev_timer.html" title="Event timer structure.">EvTimer</a> *etp) {
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <a class="code" href="group__system.html#ga9f6573c0763d1e4e97c63c62edad6e42" title="Enters the kernel lock mode.">chSysLock</a>();
<a name="l00069"></a>00069
<a name="l00070"></a>00070 <span class="keywordflow">if</span> (<a class="code" href="group__time.html#gae54e6dd40bc7b9cdeb409393ec9e134a" title="Returns TRUE if the speciified timer is armed.">chVTIsArmedI</a>(&amp;etp-&gt;et_vt))
<a name="l00071"></a>00071 <a class="code" href="group__time.html#ga680d851a74e594cc965101e79891840f" title="Disables a Virtual Timer.">chVTResetI</a>(&amp;etp-&gt;et_vt);
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <a class="code" href="group__system.html#ga5a257fa58a09815eb64a45e2dfbdc22e" title="Leaves the kernel lock mode.">chSysUnlock</a>();
<a name="l00074"></a>00074 }
<a name="l00075"></a>00075 <span class="comment"></span>
<a name="l00076"></a>00076 <span class="comment">/** @} */</span>
</pre></div></div>
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