211 lines
5.7 KiB
C
Executable File
211 lines
5.7 KiB
C
Executable File
/*
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ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file TIMv1/hal_st_lld.h
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* @brief ST Driver subsystem low level driver header.
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* @details This header is designed to be include-able without having to
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* include other files from the HAL.
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*
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* @addtogroup ST
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* @{
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*/
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#ifndef HAL_ST_LLD_H
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#define HAL_ST_LLD_H
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#include "mcuconf.h"
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#include "stm32_registry.h"
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#include "stm32_tim.h"
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @name Configuration options
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* @{
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*/
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/**
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* @brief SysTick timer IRQ priority.
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*/
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#if !defined(STM32_ST_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_ST_IRQ_PRIORITY 8
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#endif
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/**
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* @brief TIMx unit (by number) to be used for free running operations.
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* @note You must select a 32 bits timer if a 32 bits @p systick_t type
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* is required.
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* @note Timers 2, 3, 4 and 5 are supported.
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*/
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#if !defined(STM32_ST_USE_TIMER) || defined(__DOXYGEN__)
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#define STM32_ST_USE_TIMER 2
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#endif
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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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#if STM32_ST_USE_TIMER == 2
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#if !STM32_HAS_TIM2
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#error "TIM2 not present"
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#endif
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#define STM32_ST_TIM STM32_TIM2
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#elif STM32_ST_USE_TIMER == 3
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#if !STM32_HAS_TIM3
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#error "TIM3 not present"
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#endif
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#define STM32_ST_TIM STM32_TIM3
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#elif STM32_ST_USE_TIMER == 4
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#if !STM32_HAS_TIM4
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#error "TIM4 not present"
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#endif
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#define STM32_ST_TIM STM32_TIM4
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#elif STM32_ST_USE_TIMER == 5
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#if !STM32_HAS_TIM5
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#error "TIM5 not present"
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#endif
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#define STM32_ST_TIM STM32_TIM5
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#elif STM32_ST_USE_TIMER == 21
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#if !STM32_HAS_TIM21
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#error "TIM21 not present"
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#endif
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#define STM32_ST_TIM STM32_TIM21
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#elif STM32_ST_USE_TIMER == 22
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#if !STM32_HAS_TIM22
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#error "TIM22 not present"
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#endif
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#define STM32_ST_TIM STM32_TIM22
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#else
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#error "STM32_ST_USE_TIMER specifies an unsupported timer"
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#endif
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void st_lld_init(void);
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#ifdef __cplusplus
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}
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#endif
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/*===========================================================================*/
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/* Driver inline functions. */
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/*===========================================================================*/
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/**
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* @brief Returns the time counter value.
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*
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* @return The counter value.
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*
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* @notapi
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*/
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static inline systime_t st_lld_get_counter(void) {
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return (systime_t)STM32_ST_TIM->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 st_lld_start_alarm(systime_t time) {
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STM32_ST_TIM->CCR[0] = (uint32_t)time;
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STM32_ST_TIM->SR = 0;
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STM32_ST_TIM->DIER = STM32_TIM_DIER_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 st_lld_stop_alarm(void) {
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STM32_ST_TIM->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 st_lld_set_alarm(systime_t time) {
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STM32_ST_TIM->CCR[0] = (uint32_t)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 st_lld_get_alarm(void) {
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return (systime_t)STM32_ST_TIM->CCR[0];
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}
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/**
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* @brief Determines if the alarm is active.
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*
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* @return The alarm status.
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* @retval false if the alarm is not active.
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* @retval true is the alarm is active
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*
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* @notapi
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*/
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static inline bool st_lld_is_alarm_active(void) {
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return (bool)((STM32_ST_TIM->DIER & STM32_TIM_DIER_CC1IE) != 0);
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}
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#endif /* HAL_ST_LLD_H */
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/** @} */
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