evtimer.c
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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
---
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes ChibiOS/RT, without being obliged to provide
the source code for any proprietary components. See the file exception.txt
for full details of how and when the exception can be applied.
*/
/**
* @file evtimer.c
* @brief Events Generator Timer code.
*
* @addtogroup event_timer
* @{
*/
#include "ch.h"
#include "evtimer.h"
static void tmrcb(void *p) {
EvTimer *etp = p;
chEvtBroadcastI(&etp->et_es);
chVTSetI(&etp->et_vt, etp->et_interval, tmrcb, etp);
}
/**
* @brief Starts the timer
* @details If the timer was already running then the function has no effect.
*
* @param etp pointer to an initialized @p EvTimer structure.
*/
void evtStart(EvTimer *etp) {
chSysLock();
if (!chVTIsArmedI(&etp->et_vt))
chVTSetI(&etp->et_vt, etp->et_interval, tmrcb, etp);
chSysUnlock();
}
/**
* @brief Stops the timer.
* @details If the timer was already stopped then the function has no effect.
*
* @param etp pointer to an initialized @p EvTimer structure.
*/
void evtStop(EvTimer *etp) {
chSysLock();
if (chVTIsArmedI(&etp->et_vt))
chVTResetI(&etp->et_vt);
chSysUnlock();
}
/** @} */