Diff: Driver/hw_rtc.c

Revision:

0:bacc6e701fb4

diff -r 000000000000 -r bacc6e701fb4 Driver/hw_rtc.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Driver/hw_rtc.c	Mon Mar 29 15:37:08 2021 +0000
@@ -0,0 +1,716 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+    (C)2013 Semtech
+
+Description: MCU RTC timer
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+
+Maintainer: Miguel Luis and Gregory Cristian
+*/
+/*******************************************************************************
+ * @file    hw_rtc.c
+ * @author  MCD Application Team
+ * @version V1.1.4
+ * @date    08-January-2018
+ * @brief   driver for RTC
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics International N.V.
+ * All rights reserved.</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted, provided that the following conditions are met:
+ *
+ * 1. Redistribution of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of other
+ *    contributors to this software may be used to endorse or promote products
+ *    derived from this software without specific written permission.
+ * 4. This software, including modifications and/or derivative works of this
+ *    software, must execute solely and exclusively on microcontroller or
+ *    microprocessor devices manufactured by or for STMicroelectronics.
+ * 5. Redistribution and use of this software other than as permitted under
+ *    this license is void and will automatically terminate your rights under
+ *    this license.
+ *
+ * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
+ * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT
+ * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "hw.h"
+#include "low_power_manager.h"
+
+/* Private typedef -----------------------------------------------------------*/
+typedef struct
+{
+  uint32_t Rtc_Time; /* Reference time */
+  
+  RTC_TimeTypeDef RTC_Calndr_Time; /* Reference time in calendar format */
+
+  RTC_DateTypeDef RTC_Calndr_Date; /* Reference date in calendar format */
+  
+} RtcTimerContext_t;
+
+/* Private define ------------------------------------------------------------*/
+
+/* MCU Wake Up Time */
+#define MIN_ALARM_DELAY            3U /* in ticks */
+
+/* subsecond number of bits */
+#define N_PREDIV_S                10U
+
+/* Synchronous prediv  */
+#define PREDIV_S                  ((1<<N_PREDIV_S)-1)
+
+/* Asynchronous prediv   */
+#define PREDIV_A                  (1<<(15-N_PREDIV_S))-1
+
+/* Sub-second mask definition  */
+#if  (N_PREDIV_S == 10)
+#define HW_RTC_ALARMSUBSECONDMASK RTC_ALARMSUBSECONDMASK_SS14_10
+#else
+#error "Please define HW_RTC_ALARMSUBSECONDMASK"
+#endif
+
+/* RTC Time base in us */
+#define USEC_NUMBER               1000000U
+#define MSEC_NUMBER               (USEC_NUMBER/1000)
+#define RTC_ALARM_TIME_BASE       (USEC_NUMBER>>N_PREDIV_S)
+
+#define COMMON_FACTOR             3U
+#define CONV_NUMER                (MSEC_NUMBER>>COMMON_FACTOR)
+#define CONV_DENOM                (1<<(N_PREDIV_S-COMMON_FACTOR))
+
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/*!
+ * \brief Indicates if the RTC is already Initialized or not
+ */
+static bool HW_RTC_Initalized = false;
+
+/*!
+ * \brief compensates MCU wakeup time
+ */
+ 
+static bool McuWakeUpTimeInitialized = false;
+
+/*!
+ * \brief compensates MCU wakeup time
+ */
+ 
+static int16_t McuWakeUpTimeCal = 0;
+
+/*!
+ * Number of seconds in a minute
+ */
+static const uint8_t SecondsInMinute = 60;
+
+/*!
+ * Number of seconds in an hour
+ */
+static const uint16_t SecondsInHour = 3600;
+
+/*!
+ * Number of seconds in a day
+ */
+static const uint32_t SecondsInDay = 86400;
+
+/*!
+ * Number of hours in a day
+ */
+static const uint8_t HoursInDay = 24;
+
+/*!
+ * Number of days in a standard year
+ */
+static const uint16_t DaysInYear = 365;
+
+/*!
+ * Number of days in a leap year
+ */
+static const uint16_t DaysInLeapYear = 366;
+
+/*!
+ * Number of days in each month on a normal year
+ */
+static const uint8_t DaysInMonth[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+
+/*!
+ * Number of days in each month on a leap year
+ */
+static const uint8_t DaysInMonthLeapYear[] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+
+static RTC_HandleTypeDef RtcHandle={0};
+
+static RTC_AlarmTypeDef RTC_AlarmStructure;
+
+/*!
+ * Keep the value of the RTC timer when the RTC alarm is set
+ * Set with the HW_RTC_SetTimerContext function
+ * Value is kept as a Reference to calculate alarm
+ */
+static RtcTimerContext_t RtcTimerContext;
+
+/* Private function prototypes -----------------------------------------------*/
+
+static void HW_RTC_SetConfig( void );
+
+static void HW_RTC_SetAlarmConfig( void );
+
+static void HW_RTC_StartWakeUpAlarm( uint32_t timeoutValue );
+
+static uint32_t HW_RTC_GetCalendarValue(  RTC_DateTypeDef* RTC_DateStruct, RTC_TimeTypeDef* RTC_TimeStruct  );
+
+/* Exported functions ---------------------------------------------------------*/
+
+/*!
+ * @brief Initializes the RTC timer
+ * @note The timer is based on the RTC
+ * @param none
+ * @retval none
+ */
+void HW_RTC_Init( void )
+{
+  if( HW_RTC_Initalized == false )
+  {
+    HW_RTC_SetConfig( );
+    HW_RTC_SetAlarmConfig( );
+    HW_RTC_SetTimerContext( );
+    HW_RTC_Initalized = true;
+  }
+}
+
+/*!
+ * @brief Configures the RTC timer
+ * @note The timer is based on the RTC
+ * @param none
+ * @retval none
+ */
+static void HW_RTC_SetConfig( void )
+{
+  RTC_TimeTypeDef RTC_TimeStruct;
+  RTC_DateTypeDef RTC_DateStruct;
+
+  RtcHandle.Instance = RTC;
+
+  RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
+  RtcHandle.Init.AsynchPrediv = PREDIV_A; /* RTC_ASYNCH_PREDIV; */
+  RtcHandle.Init.SynchPrediv = PREDIV_S; /* RTC_SYNCH_PREDIV; */
+  RtcHandle.Init.OutPut = RTC_OUTPUT;
+  RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
+  RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
+
+  HAL_RTC_Init( &RtcHandle );
+  
+  /*Monday 1st January 2016*/
+  RTC_DateStruct.Year = 16;
+  RTC_DateStruct.Month = RTC_MONTH_JANUARY;
+  RTC_DateStruct.Date = 1;
+  RTC_DateStruct.WeekDay = RTC_WEEKDAY_MONDAY;
+  HAL_RTC_SetDate(&RtcHandle , &RTC_DateStruct, RTC_FORMAT_BIN);
+  
+  /*at 0:0:0*/
+  RTC_TimeStruct.Hours = 0;
+  RTC_TimeStruct.Minutes = 0;
+
+  RTC_TimeStruct.Seconds = 0;
+  RTC_TimeStruct.TimeFormat = 0;
+  RTC_TimeStruct.SubSeconds = 0;
+  RTC_TimeStruct.StoreOperation = RTC_DAYLIGHTSAVING_NONE;
+  RTC_TimeStruct.DayLightSaving = RTC_STOREOPERATION_RESET;
+  
+  HAL_RTC_SetTime(&RtcHandle , &RTC_TimeStruct, RTC_FORMAT_BIN);
+  
+ /*Enable Direct Read of the calendar registers (not through Shadow) */
+  HAL_RTCEx_EnableBypassShadow(&RtcHandle);
+}
+
+/*!
+ * @brief calculates the wake up time between wake up and mcu start
+ * @note resolution in RTC_ALARM_TIME_BASE in timer ticks
+ * @param none
+ * @retval none
+ */
+void HW_RTC_setMcuWakeUpTime( void )
+{
+  RTC_TimeTypeDef RTC_TimeStruct;
+  RTC_DateTypeDef RTC_DateStruct;
+  
+  uint32_t now, hit;
+  int16_t McuWakeUpTime;
+  
+  if ((McuWakeUpTimeInitialized == false) &&
+      ( HAL_NVIC_GetPendingIRQ( RTC_Alarm_IRQn ) == 1))
+  { /* warning: works ok if now is below 30 days
+       it is ok since it's done once at first alarm wake-up*/
+    McuWakeUpTimeInitialized = true;
+    now = HW_RTC_GetCalendarValue( &RTC_DateStruct, &RTC_TimeStruct );
+
+    DBG_GPIO_SET(GPIOB, GPIO_PIN_13);
+    DBG_GPIO_RST(GPIOB, GPIO_PIN_13);
+    HAL_RTC_GetAlarm(&RtcHandle, &RTC_AlarmStructure, RTC_ALARM_A, RTC_FORMAT_BIN );
+    hit = RTC_AlarmStructure.AlarmTime.Seconds+
+          60*(RTC_AlarmStructure.AlarmTime.Minutes+
+          60*(RTC_AlarmStructure.AlarmTime.Hours+
+          24*(RTC_AlarmStructure.AlarmDateWeekDay)));
+    hit = ( hit << N_PREDIV_S ) + (PREDIV_S - RTC_AlarmStructure.AlarmTime.SubSeconds);
+      
+    McuWakeUpTime = (int16_t) ((now-hit));
+    McuWakeUpTimeCal += McuWakeUpTime;
+    DBG_PRINTF("Cal=%d, %d\n",McuWakeUpTimeCal, McuWakeUpTime);
+  }
+}
+
+int16_t HW_RTC_getMcuWakeUpTime( void )
+{
+  return McuWakeUpTimeCal;
+}
+
+/*!
+ * @brief returns the wake up time in ticks
+ * @param none
+ * @retval wake up time in ticks
+ */
+uint32_t HW_RTC_GetMinimumTimeout( void )
+{
+  return( MIN_ALARM_DELAY );
+}
+
+/*!
+ * @brief converts time in ms to time in ticks
+ * @param [IN] time in milliseconds
+ * @retval returns time in timer ticks
+ */
+uint32_t HW_RTC_ms2Tick( uint32_t timeMicroSec )
+{
+/*return( ( timeMicroSec / RTC_ALARM_TIME_BASE ) ); */
+  return ( uint32_t) ( ( ((uint64_t)timeMicroSec) * CONV_DENOM ) / CONV_NUMER );
+}
+
+/*!
+ * @brief converts time in ticks to time in ms
+ * @param [IN] time in timer ticks
+ * @retval returns time in milliseconds
+ */
+uint32_t HW_RTC_Tick2ms( uint32_t tick )
+{
+/*return( ( timeMicroSec * RTC_ALARM_TIME_BASE ) ); */
+  return  ( ( (uint64_t)( tick )* CONV_NUMER ) / CONV_DENOM );
+}
+
+/*!
+ * @brief Set the alarm
+ * @note The alarm is set at now (read in this funtion) + timeout
+ * @param timeout Duration of the Timer ticks
+ */
+void HW_RTC_SetAlarm( uint32_t timeout )
+{
+  /* we don't go in Low Power mode for timeout below MIN_ALARM_DELAY */
+  if ( (MIN_ALARM_DELAY + McuWakeUpTimeCal ) < ((timeout - HW_RTC_GetTimerElapsedTime( ) )) )
+  {
+    LPM_SetStopMode(LPM_RTC_Id , LPM_Enable );
+  }
+  else
+  {
+    LPM_SetStopMode(LPM_RTC_Id , LPM_Disable );
+  }
+
+  /*In case stop mode is required */
+  if( LPM_GetMode() == LPM_StopMode )
+  {
+    timeout = timeout -  McuWakeUpTimeCal;
+  }
+
+  HW_RTC_StartWakeUpAlarm( timeout );
+}
+
+/*!
+ * @brief Get the RTC timer elapsed time since the last Alarm was set
+ * @param none
+ * @retval RTC Elapsed time in ticks
+ */
+uint32_t HW_RTC_GetTimerElapsedTime( void )
+{
+  RTC_TimeTypeDef RTC_TimeStruct;
+  RTC_DateTypeDef RTC_DateStruct;
+  
+  uint32_t CalendarValue = HW_RTC_GetCalendarValue(&RTC_DateStruct, &RTC_TimeStruct );
+
+  return( ( uint32_t )( CalendarValue - RtcTimerContext.Rtc_Time ));
+}
+
+/*!
+ * @brief Get the RTC timer value
+ * @param none
+ * @retval RTC Timer value in ticks
+ */
+uint32_t HW_RTC_GetTimerValue( void )
+{
+  RTC_TimeTypeDef RTC_TimeStruct;
+  RTC_DateTypeDef RTC_DateStruct;
+  
+  uint32_t CalendarValue = (uint32_t) HW_RTC_GetCalendarValue(&RTC_DateStruct, &RTC_TimeStruct );
+
+  return( CalendarValue );
+}
+
+/*!
+ * @brief Stop the Alarm
+ * @param none
+ * @retval none
+ */
+void HW_RTC_StopAlarm( void )
+{
+
+  /* Clear RTC Alarm Flag */
+  __HAL_RTC_ALARM_CLEAR_FLAG( &RtcHandle, RTC_FLAG_ALRAF);
+
+  /* Disable the Alarm A interrupt */
+
+  HAL_RTC_DeactivateAlarm(&RtcHandle, RTC_ALARM_A );
+}
+
+/*!
+ * @brief RTC IRQ Handler on the RTC Alarm
+ * @param none
+ * @retval none
+ */
+void HW_RTC_IrqHandler ( void )
+{
+  RTC_HandleTypeDef* hrtc=&RtcHandle;
+  /* enable low power at irq*/
+  LPM_SetStopMode(LPM_RTC_Id , LPM_Enable );
+  
+    /* Get the AlarmA interrupt source enable status */
+  if(__HAL_RTC_ALARM_GET_IT_SOURCE(hrtc, RTC_IT_ALRA) != RESET)
+  {
+    /* Get the pending status of the AlarmA Interrupt */
+    if(__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRAF) != RESET)
+    {
+      /* Clear the AlarmA interrupt pending bit */
+      __HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRAF); 
+      /* Clear the EXTI's line Flag for RTC Alarm */
+      __HAL_RTC_ALARM_EXTI_CLEAR_FLAG();
+      /* AlarmA callback */
+      HAL_RTC_AlarmAEventCallback(hrtc);
+    }
+  }
+}
+
+
+/*!
+ * @brief a delay of delay ms by polling RTC
+ * @param delay in ms
+ * @retval none
+ */
+void HW_RTC_DelayMs( uint32_t delay )
+{
+  uint32_t delayValue = 0;
+  uint32_t timeout = 0;
+
+  delayValue = HW_RTC_ms2Tick( delay );
+
+  /* Wait delay ms */
+  timeout = HW_RTC_GetTimerValue( );
+  while( ( ( HW_RTC_GetTimerValue( ) - timeout ) ) < delayValue )
+  {
+    __NOP( );
+  }
+}
+
+/*!
+ * @brief set Time Reference set also the RTC_DateStruct and RTC_TimeStruct
+ * @param none
+ * @retval Timer Value
+ */
+uint32_t HW_RTC_SetTimerContext( void )
+{
+  RtcTimerContext.Rtc_Time = HW_RTC_GetCalendarValue( &RtcTimerContext.RTC_Calndr_Date, &RtcTimerContext.RTC_Calndr_Time );
+  return ( uint32_t ) RtcTimerContext.Rtc_Time;
+}
+
+/*!
+ * @brief Get the RTC timer Reference
+ * @param none
+ * @retval Timer Value in  Ticks
+ */
+uint32_t HW_RTC_GetTimerContext( void )
+{
+  return (uint32_t) RtcTimerContext.Rtc_Time;
+}
+/* Private functions ---------------------------------------------------------*/
+
+/*!
+ * @brief configure alarm at init
+ * @param none
+ * @retval none
+ */
+static void HW_RTC_SetAlarmConfig( void )
+{
+  HAL_RTC_DeactivateAlarm(&RtcHandle, RTC_ALARM_A);
+}
+
+/*!
+ * @brief start wake up alarm
+ * @note  alarm in RtcTimerContext.Rtc_Time + timeoutValue
+ * @param timeoutValue in ticks
+ * @retval none
+ */
+static void HW_RTC_StartWakeUpAlarm( uint32_t timeoutValue )
+{
+  uint16_t rtcAlarmSubSeconds = 0;
+  uint16_t rtcAlarmSeconds = 0;
+  uint16_t rtcAlarmMinutes = 0;
+  uint16_t rtcAlarmHours = 0;
+  uint16_t rtcAlarmDays = 0;
+  RTC_TimeTypeDef RTC_TimeStruct = RtcTimerContext.RTC_Calndr_Time;
+  RTC_DateTypeDef RTC_DateStruct = RtcTimerContext.RTC_Calndr_Date;
+
+  HW_RTC_StopAlarm( );
+  DBG_GPIO_SET(GPIOB, GPIO_PIN_13);
+  
+  /*reverse counter */
+  rtcAlarmSubSeconds =  PREDIV_S - RTC_TimeStruct.SubSeconds;
+  rtcAlarmSubSeconds += ( timeoutValue & PREDIV_S);
+  /* convert timeout  to seconds */
+  timeoutValue >>= N_PREDIV_S;  /* convert timeout  in seconds */
+  
+  /*convert microsecs to RTC format and add to 'Now' */
+  rtcAlarmDays =  RTC_DateStruct.Date;
+  while (timeoutValue >= SecondsInDay)
+  {
+    timeoutValue -= SecondsInDay;
+    rtcAlarmDays++;
+  }
+  
+  /* calc hours */
+  rtcAlarmHours = RTC_TimeStruct.Hours;
+  while (timeoutValue >= SecondsInHour)
+  {
+    timeoutValue -= SecondsInHour;
+    rtcAlarmHours++;
+  }
+  
+  /* calc minutes */
+  rtcAlarmMinutes = RTC_TimeStruct.Minutes;
+  while (timeoutValue >= SecondsInMinute)
+  {
+    timeoutValue -= SecondsInMinute;
+    rtcAlarmMinutes++;
+  }
+   
+  /* calc seconds */
+  rtcAlarmSeconds =  RTC_TimeStruct.Seconds + timeoutValue;
+
+  /***** correct for modulo********/
+  while (rtcAlarmSubSeconds >= (PREDIV_S+1))
+  {
+    rtcAlarmSubSeconds -= (PREDIV_S+1);
+    rtcAlarmSeconds++;
+  }
+  
+  while (rtcAlarmSeconds >= 60)
+  { 
+    rtcAlarmSeconds -= 60;
+    rtcAlarmMinutes++;
+  }
+
+  while (rtcAlarmMinutes >= 60)
+  {
+    rtcAlarmMinutes -= 60;
+    rtcAlarmHours++;
+  }
+  
+  while (rtcAlarmHours >= HoursInDay)
+  {
+    rtcAlarmHours -= HoursInDay;
+    rtcAlarmDays++;
+  }
+
+  if( RTC_DateStruct.Year % 4 == 0 ) 
+  {
+    if( rtcAlarmDays > DaysInMonthLeapYear[ RTC_DateStruct.Month - 1 ] )    
+    {
+      rtcAlarmDays = rtcAlarmDays % DaysInMonthLeapYear[ RTC_DateStruct.Month - 1 ];
+    }
+  }
+  else
+  {
+    if( rtcAlarmDays > DaysInMonth[ RTC_DateStruct.Month - 1 ] )    
+    {   
+      rtcAlarmDays = rtcAlarmDays % DaysInMonth[ RTC_DateStruct.Month - 1 ];
+    }
+  }
+
+  /* Set RTC_AlarmStructure with calculated values*/
+  RTC_AlarmStructure.AlarmTime.SubSeconds = PREDIV_S-rtcAlarmSubSeconds;
+  RTC_AlarmStructure.AlarmSubSecondMask  = HW_RTC_ALARMSUBSECONDMASK; 
+  RTC_AlarmStructure.AlarmTime.Seconds = rtcAlarmSeconds;
+  RTC_AlarmStructure.AlarmTime.Minutes = rtcAlarmMinutes;
+  RTC_AlarmStructure.AlarmTime.Hours   = rtcAlarmHours;
+  RTC_AlarmStructure.AlarmDateWeekDay    = ( uint8_t )rtcAlarmDays;
+  RTC_AlarmStructure.AlarmTime.TimeFormat   = RTC_TimeStruct.TimeFormat;
+  RTC_AlarmStructure.AlarmDateWeekDaySel   = RTC_ALARMDATEWEEKDAYSEL_DATE; 
+  RTC_AlarmStructure.AlarmMask       = RTC_ALARMMASK_NONE;
+  RTC_AlarmStructure.Alarm = RTC_ALARM_A;
+  RTC_AlarmStructure.AlarmTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
+  RTC_AlarmStructure.AlarmTime.StoreOperation = RTC_STOREOPERATION_RESET;
+  
+  /* Set RTC_Alarm */
+  HAL_RTC_SetAlarm_IT( &RtcHandle, &RTC_AlarmStructure, RTC_FORMAT_BIN );
+  
+  /* Debug Printf*/
+  DBG( HW_RTC_GetCalendarValue( &RTC_DateStruct, &RTC_TimeStruct ); );
+  //DBG_PRINTF("it's %d:%d:%d:%d ", RTC_TimeStruct.Hours, RTC_TimeStruct.Minutes, RTC_TimeStruct.Seconds, (uint16_t)((PREDIV_S - RTC_TimeStruct.SubSeconds)*1000)>>N_PREDIV_S);
+  //DBG_PRINTF("WU@ %d:%d:%d:%d\n", rtcAlarmHours, rtcAlarmMinutes, rtcAlarmSeconds, (rtcAlarmSubSeconds*1000)>>N_PREDIV_S );
+  
+  DBG_GPIO_RST(GPIOB, GPIO_PIN_13);
+}
+
+
+/*!
+ * @brief get current time from calendar in ticks
+ * @param pointer to RTC_DateStruct
+ * @param pointer to RTC_TimeStruct
+ * @retval time in ticks
+ */
+static uint32_t HW_RTC_GetCalendarValue( RTC_DateTypeDef* RTC_DateStruct, RTC_TimeTypeDef* RTC_TimeStruct )
+{
+  uint32_t calendarValue = 0;
+  uint32_t i = 0;
+  uint32_t first_read;
+  
+  /* Get Time and Date*/
+  HAL_RTC_GetTime( &RtcHandle, RTC_TimeStruct, RTC_FORMAT_BIN );
+ 
+   /* make sure it is correct due to asynchronus nature of RTC*/
+  do {
+    first_read = RTC_TimeStruct->SubSeconds;
+    HAL_RTC_GetDate( &RtcHandle, RTC_DateStruct, RTC_FORMAT_BIN );
+    HAL_RTC_GetTime( &RtcHandle, RTC_TimeStruct, RTC_FORMAT_BIN );
+  } while (first_read != RTC_TimeStruct->SubSeconds);
+ 
+  /* years (calc valid up to year 2099)*/
+  for( i = 0; i < RTC_DateStruct->Year; i++ )
+  {
+    if( (i % 4) == 0 )
+    {
+      calendarValue += DaysInLeapYear * SecondsInDay;
+    }
+    else
+    {
+      calendarValue += DaysInYear * SecondsInDay;
+    }
+  }
+
+  /* months (calc valid up to year 2099)*/
+  if(( (RTC_DateStruct->Year % 4) == 0 ) )
+  {
+    for( i = 0; i < ( RTC_DateStruct->Month - 1 ); i++ )
+    {
+      calendarValue += DaysInMonthLeapYear[i] * SecondsInDay;
+    }
+  }
+  else
+  {
+    for( i = 0;  i < ( RTC_DateStruct->Month - 1 ); i++ )
+    {
+      calendarValue += DaysInMonth[i] * SecondsInDay;
+    }
+  }
+
+  /* days */
+  calendarValue += ( ( uint32_t )RTC_TimeStruct->Seconds + 
+                     ( ( uint32_t )RTC_TimeStruct->Minutes * SecondsInMinute ) +
+                     ( ( uint32_t )RTC_TimeStruct->Hours * SecondsInHour ) + 
+                     ( ( uint32_t )( RTC_DateStruct->Date * SecondsInDay ) ) );
+  
+  calendarValue = (calendarValue<<N_PREDIV_S) + ( PREDIV_S - RTC_TimeStruct->SubSeconds);
+
+  return( calendarValue );
+}
+
+
+/**
+  * @brief RTC MSP Initialization
+  *        This function configures the hardware resources used in this example:
+  *           - Peripheral's clock enable
+  * @param hrtc: RTC handle pointer
+  * @note  Care must be taken when HAL_RCCEx_PeriphCLKConfig() is used to select
+  *        the RTC clock source; in this case the Backup domain will be reset in
+  *        order to modify the RTC Clock source, as consequence RTC registers (including
+  *        the backup registers) and RCC_CSR register are set to their reset values.
+  * @retval None
+  */
+void HAL_RTC_MspInit(RTC_HandleTypeDef *hrtc)
+{
+  RCC_OscInitTypeDef RCC_OscInitStruct;
+  RCC_PeriphCLKInitTypeDef  PeriphClkInitStruct;
+
+  /*##-1- Configue the RTC clock soucre ######################################*/
+  /* -a- Enable LSE Oscillator */
+  RCC_OscInitStruct.OscillatorType =  RCC_OSCILLATORTYPE_LSE;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
+  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
+  if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
+  {
+      DBG_PRINTF("Error_Handler\n\r");
+      while(1);
+  }
+
+  /* -b- Select LSI as RTC clock source */
+  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
+  PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
+  if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
+  {
+      DBG_PRINTF("Error_Handler\n\r");
+      while(1);
+  }
+
+  /*##-2- Enable the RTC peripheral Clock ####################################*/
+  /* Enable RTC Clock */
+  __HAL_RCC_RTC_ENABLE();
+
+  /*##-3- Configure the NVIC for RTC Alarm ###################################*/
+  HAL_NVIC_SetPriority(RTC_Alarm_IRQn, 0, 0);
+  HAL_NVIC_EnableIRQ(RTC_Alarm_IRQn);
+}
+
+/**
+  * @brief RTC MSP De-Initialization
+  *        This function freeze the hardware resources used in this example:
+  *          - Disable the Peripheral's clock
+  * @param hrtc: RTC handle pointer
+  * @retval None
+  */
+void HAL_RTC_MspDeInit(RTC_HandleTypeDef *hrtc)
+{
+  /* Reset peripherals */
+  __HAL_RCC_RTC_DISABLE();
+}
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+
+