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322 lines
10 KiB
C
322 lines
10 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2018 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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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 hal_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 == TRUE) || 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 == TRUE
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rtcp->vmt = &_rtc_lld_vmt;
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#else
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(void)rtcp;
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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 < (rtcalarm_t)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) &&
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(alarm < (rtcalarm_t)RTC_ALARMS) &&
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(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 == TRUE) || 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 == TRUE */
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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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* @param[out] tv_msec pointer to milliseconds value or @p NULL
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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 *tv_msec) {
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int sec;
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timp->tm_year = (int)timespec->year + (int)(RTC_BASE_YEAR - 1900U);
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timp->tm_mon = (int)timespec->month - 1;
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timp->tm_mday = (int)timespec->day;
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timp->tm_isdst = (int)timespec->dstflag;
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timp->tm_wday = (int)timespec->dayofweek - 1;
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sec = (int)timespec->millisecond / 1000;
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timp->tm_hour = sec / 3600;
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sec %= 3600;
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timp->tm_min = sec / 60;
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timp->tm_sec = sec % 60;
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if (NULL != tv_msec) {
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*tv_msec = (uint32_t)timespec->millisecond % 1000U;
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}
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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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/*lint -save -e9034 [10.4] Verified assignments to bit fields.*/
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timespec->year = (uint32_t)timp->tm_year - (RTC_BASE_YEAR - 1900U);
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timespec->month = (uint32_t)timp->tm_mon + 1U;
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timespec->day = (uint32_t)timp->tm_mday;
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timespec->dayofweek = (uint32_t)timp->tm_wday + 1U;
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if (-1 == timp->tm_isdst) {
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timespec->dstflag = 0U; /* Set zero if dst is unknown.*/
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}
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else {
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timespec->dstflag = (uint32_t)timp->tm_isdst;
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}
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/*lint -restore*/
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/*lint -save -e9033 [10.8] Verified assignments to bit fields.*/
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timespec->millisecond = tv_msec + (uint32_t)(((timp->tm_hour * 3600) +
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(timp->tm_min * 60) +
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timp->tm_sec) * 1000);
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/*lint -restore*/
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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;
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sec = timespec->millisecond / 1000U;
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hour = sec / 3600U;
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sec %= 3600U;
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min = sec / 60U;
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sec %= 60U;
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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 (1U == timespec->dstflag) {
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hour += 1U;
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if (hour == 24U) {
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hour = 0U;
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day += 1U;
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if (day > month_len[month - 1U]) {
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day = 1U;
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month += 1U;
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}
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}
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}
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fattime = sec >> 1U;
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fattime |= min << 5U;
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fattime |= hour << 11U;
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fattime |= day << 16U;
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fattime |= month << 21U;
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fattime |= (uint32_t)timespec->year << 25U;
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return fattime;
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}
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#endif /* HAL_USE_RTC == TRUE */
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/** @} */
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