157 lines
4.5 KiB
C
157 lines
4.5 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012,2013 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file STM32F3xx/systick.h
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* @brief System timer header file.
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*
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* @addtogroup STM32F3_TIMER
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* @{
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*/
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#ifndef _CHTIMER_H_
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#define _CHTIMER_H_
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/*===========================================================================*/
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/* Module constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module pre-compile time settings. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module data structures and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module macros. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module inline functions. */
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/*===========================================================================*/
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/**
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* @brief Timer unit initialization.
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*
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* @notapi
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*/
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static inline void port_timer_init(void) {
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TIM2->ARR = 0xFFFFFFFF;
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TIM2->CCMR1 = 0;
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TIM2->CCR1 = 0;
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TIM2->DIER = 0;
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TIM2->CR2 = 0;
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TIM2->EGR = TIM_EGR_UG;
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TIM2->CR1 = TIM_CR1_CEN;
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}
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/**
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* @brief Returns the system time.
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*
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* @return The system time.
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*
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* @notapi
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*/
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static inline systime_t port_timer_get_time(void) {
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return TIM2->CNT;
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}
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/**
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* @brief Starts the alarm.
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* @note Makes sure that no spurious alarms are triggered after
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* this call.
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*
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* @param[in] time the time to be set for the first alarm
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*
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* @notapi
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*/
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static inline void port_timer_start_alarm(systime_t time) {
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chDbgAssert((TIM2->DIER & 2) == 0,
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"port_timer_start_alarm(), #1",
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"already started");
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TIM2->CCR1 = time;
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TIM2->SR = 0;
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TIM2->DIER = 2; /* CC1IE */
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}
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/**
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* @brief Stops the alarm interrupt.
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*
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* @notapi
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*/
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static inline void port_timer_stop_alarm(void) {
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chDbgAssert((TIM2->DIER & 2) != 0,
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"port_timer_stop_alarm(), #1",
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"not started");
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TIM2->DIER = 0;
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}
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/**
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* @brief Sets the alarm time.
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*
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* @param[in] time the time to be set for the next alarm
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*
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* @notapi
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*/
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static inline void port_timer_set_alarm(systime_t time) {
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chDbgAssert((TIM2->DIER & 2) != 0,
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"port_timer_set_alarm(), #1",
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"not started");
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TIM2->CCR1 = time;
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}
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/**
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* @brief Returns the current alarm time.
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*
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* @return The currently set alarm time.
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*
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* @notapi
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*/
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static inline systime_t port_timer_get_alarm(void) {
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chDbgAssert((TIM2->DIER & 2) != 0,
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"port_timer_get_alarm(), #1",
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"not started");
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return TIM2->CCR1;
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}
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#endif /* _CHTIMER_H_ */
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/** @} */
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