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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011 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 STM32/RTCv1/rtc_lld.h
* @brief STM32 RTC subsystem low level driver header.
*
* @addtogroup RTC
* @{
*/
#ifndef _RTC_LLD_H_
#define _RTC_LLD_H_
#if HAL_USE_RTC || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/**
* @brief This RTC implementation supports callbacks.
*/
#define RTC_SUPPORTS_CALLBACKS TRUE
/**
* @brief One alarm comparator available.
*/
#define RTC_ALARMS 1
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if HAL_USE_RTC && !STM32_HAS_RTC
#error "RTC not present in the selected device"
#endif
#if !(STM32_RTC == STM32_RTC_LSE) && !(STM32_RTC == STM32_RTC_LSI) && \
!(STM32_RTC == STM32_RTC_HSE)
#error "invalid source selected for RTC clock"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Type of a structure representing an RTC alarm stamp.
*/
typedef struct RTCAlarm RTCAlarm;
/**
* @brief Type of an RTC alarm.
*/
typedef uint32_t rtcalarm_t;
/**
* @brief Type of an RTC event.
*/
typedef enum {
RTC_EVENT_SECOND = 0, /** Triggered every second. */
RTC_EVENT_ALARM = 1, /** Triggered on alarm. */
RTC_EVENT_OVERFLOW = 2 /** Triggered on counter overflow. */
} rtcevent_t;
/**
* @brief Type of a generic RTC callback.
*/
typedef void (*rtccb_t)(RTCDriver *rtcp, rtcevent_t event);
/**
* @brief Structure representing an RTC time stamp.
*/
struct RTCTime {
/**
* @brief Seconds since UNIX epoch.
*/
uint32_t tv_sec;
/**
* @brief Fractional part.
*/
uint32_t tv_msec;
};
/**
* @brief Structure representing an RTC alarm specification.
*/
struct RTCAlarm {
/**
* @brief Seconds since UNIX epoch.
*/
uint32_t tv_sec;
};
/**
* @brief Structure representing an RTC driver.
*/
struct RTCDriver{
/**
* @brief Callback pointer.
*/
rtccb_t rtc_cb;
};
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if !defined(__DOXYGEN__)
extern RTCDriver RTCD1;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void rtc_lld_init(void);
void rtc_lld_set_time(RTCDriver *rtcp, const RTCTime *timespec);
void rtc_lld_get_time(RTCDriver *rtcp, RTCTime *timespec);
void rtc_lld_set_alarm(RTCDriver *rtcp,
rtcalarm_t alarm,
const RTCAlarm *alarmspec);
void rtc_lld_get_alarm(RTCDriver *rtcp,
rtcalarm_t alarm,
RTCAlarm *alarmspec);
void rtc_lld_set_callback(RTCDriver *rtcp, rtccb_t callback);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_RTC */
#endif /* _RTC_LLD_H_ */
/** @} */
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