ChibiOS/RT Architecture - Reference Manual - Guides |
00001 /* 00002 ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio. 00003 00004 This file is part of ChibiOS/RT. 00005 00006 ChibiOS/RT is free software; you can redistribute it and/or modify 00007 it under the terms of the GNU General Public License as published by 00008 the Free Software Foundation; either version 3 of the License, or 00009 (at your option) any later version. 00010 00011 ChibiOS/RT is distributed in the hope that it will be useful, 00012 but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 GNU General Public License for more details. 00015 00016 You should have received a copy of the GNU General Public License 00017 along with this program. If not, see <http://www.gnu.org/licenses/>. 00018 00019 --- 00020 00021 A special exception to the GPL can be applied should you wish to distribute 00022 a combined work that includes ChibiOS/RT, without being obliged to provide 00023 the source code for any proprietary components. See the file exception.txt 00024 for full details of how and when the exception can be applied. 00025 */ 00026 00027 /** 00028 * @file evtimer.c 00029 * @brief Events Generator Timer code. 00030 * @addtogroup event_timer 00031 * @{ 00032 */ 00033 00034 #include "ch.h" 00035 #include "evtimer.h" 00036 00037 static void tmrcb(void *p) { 00038 EvTimer *etp = p; 00039 00040 chEvtBroadcastI(&etp->et_es); 00041 chVTSetI(&etp->et_vt, etp->et_interval, tmrcb, etp); 00042 } 00043 00044 /** 00045 * @brief Starts the timer 00046 * @details If the timer was already running then the function has no effect. 00047 * 00048 * @param etp pointer to an initialized @p EvTimer structure. 00049 */ 00050 void evtStart(EvTimer *etp) { 00051 00052 chSysLock(); 00053 00054 if (!chVTIsArmedI(&etp->et_vt)) 00055 chVTSetI(&etp->et_vt, etp->et_interval, tmrcb, etp); 00056 00057 chSysUnlock(); 00058 } 00059 00060 /** 00061 * @brief Stops the timer. 00062 * @details If the timer was already stopped then the function has no effect. 00063 * 00064 * @param etp pointer to an initialized @p EvTimer structure. 00065 */ 00066 void evtStop(EvTimer *etp) { 00067 00068 chSysLock(); 00069 00070 if (chVTIsArmedI(&etp->et_vt)) 00071 chVTResetI(&etp->et_vt); 00072 00073 chSysUnlock(); 00074 } 00075 00076 /** @} */