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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012,2013 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/>.
*/
/**
* @file ARMCMx/chcore_timer.h
* @brief System timer header file.
*
* @addtogroup ARMCMx_TIMER
* @{
*/
#ifndef _CHCORE_TIMER_H_
#define _CHCORE_TIMER_H_
#if defined(CH_PORT_DO_NOT_USE_ST)
/* If, for some reason, the use of the HAL-provided ST timer port interface
is not wanted, it is possible to provide the timer interface into a custom
module.*/
#include "chcore_timer_ext.h"
#else /* !defined(CH_PORT_DO_NOT_USE_ST) */
/* This is the only header in the HAL designed to be include-able alone.*/
#include "st.h"
/*===========================================================================*/
/* Module constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Module pre-compile time settings. */
/*===========================================================================*/
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Module data structures and types. */
/*===========================================================================*/
/*===========================================================================*/
/* Module macros. */
/*===========================================================================*/
/**
* @brief Starts the alarm.
* @note Makes sure that no spurious alarms are triggered after
* this call.
*
* @param[in] time the time to be set for the first alarm
*
* @notapi
*/
#define port_timer_start_alarm(time) { \
chDbgAssert(stIsAlarmActive() == false, "already active"); \
stStartAlarm(time); \
}
/**
* @brief Stops the alarm interrupt.
*
* @notapi
*/
#define port_timer_stop_alarm() { \
chDbgAssert(stIsAlarmActive() != false, "not active"); \
stStopAlarm(); \
}
/**
* @brief Sets the alarm time.
*
* @param[in] time the time to be set for the next alarm
*
* @notapi
*/
#define port_timer_set_alarm(time) { \
chDbgAssert(stIsAlarmActive() != false, "not active"); \
stSetAlarm(time); \
}
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
/*===========================================================================*/
/* Module inline functions. */
/*===========================================================================*/
/**
* @brief Returns the system time.
*
* @return The system time.
*
* @notapi
*/
static inline systime_t port_timer_get_time(void) {
return stGetCounter();
}
/**
* @brief Returns the current alarm time.
*
* @return The currently set alarm time.
*
* @notapi
*/
static inline systime_t port_timer_get_alarm(void) {
return stGetAlarm();
}
#endif /* !defined(CH_PORT_DO_NOT_USE_ST) */
#endif /* _CHCORE_TIMER_H_ */
/** @} */
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