308 lines
9.8 KiB
C
308 lines
9.8 KiB
C
/*
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ChibiOS/HAL - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012,2013,2014 Giovanni Di Sirio.
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This file is part of ChibiOS/HAL
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ChibiOS/HAL 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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Concepts and parts of this file have been contributed by Uladzimir Pylinsky
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aka barthess.
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*/
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/**
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* @file rtc.c
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* @brief RTC Driver code.
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*
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* @addtogroup RTC
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* @{
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*/
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#include "hal.h"
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#if HAL_USE_RTC || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*
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* Lookup table with months' length
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*/
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static const uint8_t month_len[12] = {
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31, 30, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
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};
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief RTC Driver initialization.
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* @note This function is implicitly invoked by @p halInit(), there is
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* no need to explicitly initialize the driver.
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*
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* @init
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*/
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void rtcInit(void) {
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rtc_lld_init();
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}
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/**
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* @brief Initializes a generic RTC driver object.
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* @details The HW dependent part of the initialization has to be performed
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* outside, usually in the hardware initialization code.
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*
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* @param[out] rtcp pointer to RTC driver structure
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*
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* @init
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*/
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void rtcObjectInit(RTCDriver *rtcp) {
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#if RTC_HAS_STORAGE
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rtcp->vmt = &_rtc_lld_vmt;
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#endif
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}
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/**
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* @brief Set current time.
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* @note This function can be called from any context but limitations
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* could be imposed by the low level implementation. It is
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* guaranteed that the function can be called from thread
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* context.
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* @note The function can be reentrant or not reentrant depending on
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* the low level implementation.
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*
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* @param[in] rtcp pointer to RTC driver structure
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* @param[in] timespec pointer to a @p RTCDateTime structure
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*
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* @special
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*/
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void rtcSetTime(RTCDriver *rtcp, const RTCDateTime *timespec) {
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osalDbgCheck((rtcp != NULL) && (timespec != NULL));
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rtc_lld_set_time(rtcp, timespec);
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}
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/**
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* @brief Get current time.
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* @note This function can be called from any context but limitations
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* could be imposed by the low level implementation. It is
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* guaranteed that the function can be called from thread
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* context.
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* @note The function can be reentrant or not reentrant depending on
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* the low level implementation.
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*
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* @param[in] rtcp pointer to RTC driver structure
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* @param[out] timespec pointer to a @p RTCDateTime structure
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*
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* @special
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*/
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void rtcGetTime(RTCDriver *rtcp, RTCDateTime *timespec) {
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osalDbgCheck((rtcp != NULL) && (timespec != NULL));
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rtc_lld_get_time(rtcp, timespec);
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}
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#if (RTC_ALARMS > 0) || defined(__DOXYGEN__)
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/**
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* @brief Set alarm time.
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* @note This function can be called from any context but limitations
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* could be imposed by the low level implementation. It is
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* guaranteed that the function can be called from thread
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* context.
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* @note The function can be reentrant or not reentrant depending on
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* the low level implementation.
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*
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* @param[in] rtcp pointer to RTC driver structure
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* @param[in] alarm alarm identifier
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* @param[in] alarmspec pointer to a @p RTCAlarm structure or @p NULL
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*
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* @special
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*/
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void rtcSetAlarm(RTCDriver *rtcp,
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rtcalarm_t alarm,
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const RTCAlarm *alarmspec) {
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osalDbgCheck((rtcp != NULL) && (alarm < RTC_ALARMS));
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rtc_lld_set_alarm(rtcp, alarm, alarmspec);
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}
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/**
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* @brief Get current alarm.
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* @note If an alarm has not been set then the returned alarm specification
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* is not meaningful.
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* @note This function can be called from any context but limitations
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* could be imposed by the low level implementation. It is
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* guaranteed that the function can be called from thread
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* context.
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* @note The function can be reentrant or not reentrant depending on
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* the low level implementation.
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*
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* @param[in] rtcp pointer to RTC driver structure
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* @param[in] alarm alarm identifier
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* @param[out] alarmspec pointer to a @p RTCAlarm structure
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*
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* @special
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*/
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void rtcGetAlarm(RTCDriver *rtcp,
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rtcalarm_t alarm,
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RTCAlarm *alarmspec) {
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osalDbgCheck((rtcp != NULL) && (alarm < RTC_ALARMS) && (alarmspec != NULL));
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rtc_lld_get_alarm(rtcp, alarm, alarmspec);
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}
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#endif /* RTC_ALARMS > 0 */
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#if RTC_SUPPORTS_CALLBACKS || defined(__DOXYGEN__)
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/**
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* @brief Enables or disables RTC callbacks.
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* @details This function enables or disables the callback, use a @p NULL
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* pointer in order to disable it.
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* @note This function can be called from any context but limitations
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* could be imposed by the low level implementation. It is
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* guaranteed that the function can be called from thread
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* context.
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* @note The function can be reentrant or not reentrant depending on
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* the low level implementation.
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*
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* @param[in] rtcp pointer to RTC driver structure
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* @param[in] callback callback function pointer or @p NULL
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*
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* @special
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*/
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void rtcSetCallback(RTCDriver *rtcp, rtccb_t callback) {
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osalDbgCheck(rtcp != NULL);
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rtc_lld_set_callback(rtcp, callback);
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}
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#endif /* RTC_SUPPORTS_CALLBACKS */
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/**
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* @brief Convert @p RTCDateTime to broken-down time structure.
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*
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* @param[in] timespec pointer to a @p RTCDateTime structure
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* @param[out] timp pointer to a broken-down time structure
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*
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* @api
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*/
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void rtcConvertDateTimeToStructTm(const RTCDateTime *timespec,
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struct tm *timp) {
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uint32_t tmp;
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timp->tm_year = timespec->year + (1980 - 1900);
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timp->tm_mon = timespec->month - 1;
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timp->tm_mday = timespec->day;
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timp->tm_isdst = timespec->dstflag;
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tmp = timespec->millisecond / 1000;
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timp->tm_sec = tmp % 60;
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tmp -= timp->tm_sec;
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timp->tm_min = (tmp % 3600) / 60;
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tmp -= timp->tm_min * 60;
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timp->tm_hour = tmp / 3600;
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}
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/**
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* @brief Convert broken-down time structure to @p RTCDateTime.
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*
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* @param[in] timp pointer to a broken-down time structure
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* @param[in] tv_msec milliseconds value
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* @param[out] timespec pointer to a @p RTCDateTime structure
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*
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* @api
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*/
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void rtcConvertStructTmToDateTime(const struct tm *timp,
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uint32_t tv_msec,
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RTCDateTime *timespec) {
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timespec->year = timp->tm_year - (1980 - 1900);
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timespec->month = timp->tm_mon + 1;
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timespec->day = timp->tm_mday;
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timespec->dayofweek = timp->tm_wday + 1;
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if (-1 == timp->tm_isdst)
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timespec->dstflag = 0; /* set zero if dst is unknown */
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else
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timespec->dstflag = timp->tm_isdst;
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timespec->millisecond = tv_msec +
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(timp->tm_hour * 3600 + timp->tm_min * 60 + timp->tm_sec) * 1000;
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}
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/**
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* @brief Get current time in format suitable for usage in FAT file system.
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* @note The information about day of week and DST is lost in DOS
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* format, the second field loses its least significant bit.
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*
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* @param[out] timespec pointer to a @p RTCDateTime structure
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* @return FAT date/time value.
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*
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* @api
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*/
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uint32_t rtcConvertDateTimeToFAT(const RTCDateTime *timespec) {
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uint32_t fattime;
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uint32_t sec, min, hour, day, month, tmp;
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tmp = timespec->millisecond / 1000;
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sec = tmp % 60;
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min = (tmp - sec) % 3600;
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hour = (tmp - sec - min * 60) / 3600;
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day = timespec->day;
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month = timespec->month;
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/* handle DST flag */
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if (1 == timespec->dstflag) {
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hour += 1;
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if (hour == 24) {
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hour = 0;
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day += 1;
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if (day > month_len[month - 1]) {
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day = 1;
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month += 1;
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}
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}
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}
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fattime = sec >> 1;
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fattime |= min << 5;
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fattime |= hour << 11;
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fattime |= day << 16;
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fattime |= month << 21;
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fattime |= timespec->year << 25;
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return fattime;
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}
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#endif /* HAL_USE_RTC */
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/** @} */
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