stm32l4xx_hal_rtc.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32l4xx_hal.h"

#ifdef HAL_RTC_MODULE_ENABLED

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/

HAL_StatusTypeDef HAL_RTC_Init(RTC_HandleTypeDef *hrtc)
{
  HAL_StatusTypeDef status = HAL_ERROR;

  /* Check the RTC peripheral state */
  if (hrtc != NULL)
  {
    /* Check the parameters */
    assert_param(IS_RTC_ALL_INSTANCE(hrtc->Instance));
    assert_param(IS_RTC_HOUR_FORMAT(hrtc->Init.HourFormat));
    assert_param(IS_RTC_ASYNCH_PREDIV(hrtc->Init.AsynchPrediv));
    assert_param(IS_RTC_SYNCH_PREDIV(hrtc->Init.SynchPrediv));
    assert_param(IS_RTC_OUTPUT(hrtc->Init.OutPut));
    assert_param(IS_RTC_OUTPUT_REMAP(hrtc->Init.OutPutRemap));
    assert_param(IS_RTC_OUTPUT_POL(hrtc->Init.OutPutPolarity));
    assert_param(IS_RTC_OUTPUT_TYPE(hrtc->Init.OutPutType));
#if defined(STM32L412xx) || defined(STM32L422xx)
    assert_param(IS_RTC_OUTPUT_PULLUP(hrtc->Init.OutPutPullUp));
#endif

#if (USE_HAL_RTC_REGISTER_CALLBACKS == 1)
    if (hrtc->State == HAL_RTC_STATE_RESET)
    {
      /* Allocate lock resource and initialize it */
      hrtc->Lock = HAL_UNLOCKED;
      hrtc->AlarmAEventCallback          =  HAL_RTC_AlarmAEventCallback;             /* Legacy weak AlarmAEventCallback      */
      hrtc->AlarmBEventCallback          =  HAL_RTCEx_AlarmBEventCallback;           /* Legacy weak AlarmBEventCallback      */
      hrtc->TimeStampEventCallback       =  HAL_RTCEx_TimeStampEventCallback;        /* Legacy weak TimeStampEventCallback   */
      hrtc->WakeUpTimerEventCallback     =  HAL_RTCEx_WakeUpTimerEventCallback;      /* Legacy weak WakeUpTimerEventCallback */
#if defined(RTC_TAMPER1_SUPPORT)
      hrtc->Tamper1EventCallback         =  HAL_RTCEx_Tamper1EventCallback;          /* Legacy weak Tamper1EventCallback     */
#endif /* RTC_TAMPER1_SUPPORT */
      hrtc->Tamper2EventCallback         =  HAL_RTCEx_Tamper2EventCallback;          /* Legacy weak Tamper2EventCallback     */
#if defined(RTC_TAMPER3_SUPPORT)
      hrtc->Tamper3EventCallback         =  HAL_RTCEx_Tamper3EventCallback;          /* Legacy weak Tamper3EventCallback     */
#endif /* RTC_TAMPER3_SUPPORT */

      if (hrtc->MspInitCallback == NULL)
      {
        hrtc->MspInitCallback = HAL_RTC_MspInit;
      }
      /* Init the low level hardware */
      hrtc->MspInitCallback(hrtc);

      if (hrtc->MspDeInitCallback == NULL)
      {
        hrtc->MspDeInitCallback = HAL_RTC_MspDeInit;
      }
    }
#else /* #if (USE_HAL_RTC_REGISTER_CALLBACKS == 1) */
    if (hrtc->State == HAL_RTC_STATE_RESET)
    {
      /* Allocate lock resource and initialize it */
      hrtc->Lock = HAL_UNLOCKED;

      /* Initialize RTC MSP */
      HAL_RTC_MspInit(hrtc);
    }
#endif /* #if (USE_HAL_RTC_REGISTER_CALLBACKS == 1) */

#if defined(STM32L412xx) || defined(STM32L422xx)
    /* Process TAMP ip offset from RTC one */
    hrtc->TampOffset = (TAMP_BASE - RTC_BASE);
#endif
    /* Set RTC state */
    hrtc->State = HAL_RTC_STATE_BUSY;

    /* Disable the write protection for RTC registers */
    __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);

    /* Enter Initialization mode */
    status = RTC_EnterInitMode(hrtc);

    if (status == HAL_OK)
    {
#if defined(STM32L412xx) || defined(STM32L422xx)
      /* Clear RTC_CR FMT, OSEL, POL and TAMPOE Bits */
      hrtc->Instance->CR &= ~(RTC_CR_FMT | RTC_CR_POL | RTC_CR_OSEL | RTC_CR_TAMPOE);
#else
      /* Clear RTC_CR FMT, OSEL and POL Bits */
      hrtc->Instance->CR &= ~(RTC_CR_FMT | RTC_CR_OSEL | RTC_CR_POL);
#endif
      /* Set RTC_CR register */
      hrtc->Instance->CR |= (hrtc->Init.HourFormat | hrtc->Init.OutPut | hrtc->Init.OutPutPolarity);

      /* Configure the RTC PRER */
      hrtc->Instance->PRER = (hrtc->Init.SynchPrediv);
      hrtc->Instance->PRER |= (hrtc->Init.AsynchPrediv << RTC_PRER_PREDIV_A_Pos);

      /* Exit Initialization mode */
      status = RTC_ExitInitMode(hrtc);

      if (status == HAL_OK)
      {
#if defined(STM32L412xx) || defined(STM32L422xx)
        hrtc->Instance->CR &= ~(RTC_CR_TAMPALRM_PU | RTC_CR_TAMPALRM_TYPE | RTC_CR_OUT2EN);
        hrtc->Instance->CR |= (hrtc->Init.OutPutPullUp | hrtc->Init.OutPutType | hrtc->Init.OutPutRemap);
#else
        hrtc->Instance->OR &= ~(RTC_OR_ALARMOUTTYPE | RTC_OR_OUT_RMP);
        hrtc->Instance->OR |= (hrtc->Init.OutPutType | hrtc->Init.OutPutRemap);
#endif

        /* Enable the write protection for RTC registers */
        __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

        if (status == HAL_OK)
        {
          hrtc->State = HAL_RTC_STATE_READY;
        }
      }
    }
  }

  return status;
}

HAL_StatusTypeDef HAL_RTC_DeInit(RTC_HandleTypeDef *hrtc)
{
  HAL_StatusTypeDef status = HAL_ERROR;

  /* Check the RTC peripheral state */
  if (hrtc != NULL)
  {
    /* Check the parameters */
    assert_param(IS_RTC_ALL_INSTANCE(hrtc->Instance));

    /* Set RTC state */
    hrtc->State = HAL_RTC_STATE_BUSY;

    /* Disable the write protection for RTC registers */
    __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);

    /* Enter Initialization mode */
    status = RTC_EnterInitMode(hrtc);

    if (status == HAL_OK)
    {
      /* Reset all RTC CR register bits */
      hrtc->Instance->TR = 0x00000000U;
      hrtc->Instance->DR = ((uint32_t)(RTC_DR_WDU_0 | RTC_DR_MU_0 | RTC_DR_DU_0));
      hrtc->Instance->CR &= 0x00000000U;

      hrtc->Instance->WUTR = RTC_WUTR_WUT;
      hrtc->Instance->PRER = ((uint32_t)(RTC_PRER_PREDIV_A | 0x000000FFU));
      hrtc->Instance->ALRMAR = 0x00000000U;
      hrtc->Instance->ALRMBR = 0x00000000U;
      hrtc->Instance->SHIFTR = 0x00000000U;
      hrtc->Instance->CALR = 0x00000000U;
      hrtc->Instance->ALRMASSR = 0x00000000U;
      hrtc->Instance->ALRMBSSR = 0x00000000U;

      /* Exit initialization mode */
      status = RTC_ExitInitMode(hrtc);


      if (status == HAL_OK)
      {
#if defined(STM32L412xx) || defined(STM32L422xx)
        /* Reset TAMP registers */
        ((TAMP_TypeDef *)((uint32_t)hrtc->Instance + hrtc->TampOffset))->CR1 = 0xFFFF0000U;
        ((TAMP_TypeDef *)((uint32_t)hrtc->Instance + hrtc->TampOffset))->CR2 = 0x00000000U;
#else
        /* Reset Tamper configuration register */
        hrtc->Instance->TAMPCR = 0x00000000U;

        /* Reset Option register */
        hrtc->Instance->OR = 0x00000000U;
#endif

        /* Enable the write protection for RTC registers */
        __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

#if (USE_HAL_RTC_REGISTER_CALLBACKS == 1)
        if (hrtc->MspDeInitCallback == NULL)
        {
          hrtc->MspDeInitCallback = HAL_RTC_MspDeInit;
        }

        /* DeInit the low level hardware: CLOCK, NVIC.*/
        hrtc->MspDeInitCallback(hrtc);
#else
        /* De-Initialize RTC MSP */
        HAL_RTC_MspDeInit(hrtc);
#endif /* (USE_HAL_RTC_REGISTER_CALLBACKS) */

        hrtc->State = HAL_RTC_STATE_RESET;

        /* Release Lock */
        __HAL_UNLOCK(hrtc);
      }
    }
  }

  return status;
}

#if (USE_HAL_RTC_REGISTER_CALLBACKS == 1)

HAL_StatusTypeDef HAL_RTC_RegisterCallback(RTC_HandleTypeDef *hrtc, HAL_RTC_CallbackIDTypeDef CallbackID, pRTC_CallbackTypeDef pCallback)
{
  HAL_StatusTypeDef status = HAL_OK;

  if (pCallback == NULL)
  {
    return HAL_ERROR;
  }

  /* Process locked */
  __HAL_LOCK(hrtc);

  if (HAL_RTC_STATE_READY == hrtc->State)
  {
    switch (CallbackID)
    {
      case HAL_RTC_ALARM_A_EVENT_CB_ID :
        hrtc->AlarmAEventCallback = pCallback;
        break;

      case HAL_RTC_ALARM_B_EVENT_CB_ID :
        hrtc->AlarmBEventCallback = pCallback;
        break;

      case HAL_RTC_TIMESTAMP_EVENT_CB_ID :
        hrtc->TimeStampEventCallback = pCallback;
        break;

      case HAL_RTC_WAKEUPTIMER_EVENT_CB_ID :
        hrtc->WakeUpTimerEventCallback = pCallback;
        break;

#if defined(RTC_TAMPER1_SUPPORT)
      case HAL_RTC_TAMPER1_EVENT_CB_ID :
        hrtc->Tamper1EventCallback = pCallback;
        break;
#endif /* RTC_TAMPER1_SUPPORT */

      case HAL_RTC_TAMPER2_EVENT_CB_ID :
        hrtc->Tamper2EventCallback = pCallback;
        break;

#if defined(RTC_TAMPER3_SUPPORT)
      case HAL_RTC_TAMPER3_EVENT_CB_ID :
        hrtc->Tamper3EventCallback = pCallback;
        break;
#endif /* RTC_TAMPER3_SUPPORT */

      case HAL_RTC_MSPINIT_CB_ID :
        hrtc->MspInitCallback = pCallback;
        break;

      case HAL_RTC_MSPDEINIT_CB_ID :
        hrtc->MspDeInitCallback = pCallback;
        break;

      default :
        /* Return error status */
        status =  HAL_ERROR;
        break;
    }
  }
  else if (HAL_RTC_STATE_RESET == hrtc->State)
  {
    switch (CallbackID)
    {
      case HAL_RTC_MSPINIT_CB_ID :
        hrtc->MspInitCallback = pCallback;
        break;

      case HAL_RTC_MSPDEINIT_CB_ID :
        hrtc->MspDeInitCallback = pCallback;
        break;

      default :
        /* Return error status */
        status =  HAL_ERROR;
        break;
    }
  }
  else
  {
    /* Return error status */
    status =  HAL_ERROR;
  }

  /* Release Lock */
  __HAL_UNLOCK(hrtc);

  return status;
}

HAL_StatusTypeDef HAL_RTC_UnRegisterCallback(RTC_HandleTypeDef *hrtc, HAL_RTC_CallbackIDTypeDef CallbackID)
{
  HAL_StatusTypeDef status = HAL_OK;

  /* Process locked */
  __HAL_LOCK(hrtc);

  if (HAL_RTC_STATE_READY == hrtc->State)
  {
    switch (CallbackID)
    {
      case HAL_RTC_ALARM_A_EVENT_CB_ID :
        hrtc->AlarmAEventCallback = HAL_RTC_AlarmAEventCallback;         /* Legacy weak AlarmAEventCallback    */
        break;

      case HAL_RTC_ALARM_B_EVENT_CB_ID :
        hrtc->AlarmBEventCallback = HAL_RTCEx_AlarmBEventCallback;          /* Legacy weak AlarmBEventCallback */
        break;

      case HAL_RTC_TIMESTAMP_EVENT_CB_ID :
        hrtc->TimeStampEventCallback = HAL_RTCEx_TimeStampEventCallback;    /* Legacy weak TimeStampEventCallback    */
        break;

      case HAL_RTC_WAKEUPTIMER_EVENT_CB_ID :
        hrtc->WakeUpTimerEventCallback = HAL_RTCEx_WakeUpTimerEventCallback; /* Legacy weak WakeUpTimerEventCallback */
        break;

#if defined(RTC_TAMPER1_SUPPORT)
      case HAL_RTC_TAMPER1_EVENT_CB_ID :
        hrtc->Tamper1EventCallback = HAL_RTCEx_Tamper1EventCallback;         /* Legacy weak Tamper1EventCallback   */
        break;
#endif /* RTC_TAMPER1_SUPPORT */

      case HAL_RTC_TAMPER2_EVENT_CB_ID :
        hrtc->Tamper2EventCallback = HAL_RTCEx_Tamper2EventCallback;         /* Legacy weak Tamper2EventCallback         */
        break;

#if defined(RTC_TAMPER3_SUPPORT)
      case HAL_RTC_TAMPER3_EVENT_CB_ID :
        hrtc->Tamper3EventCallback = HAL_RTCEx_Tamper3EventCallback;         /* Legacy weak Tamper3EventCallback         */
        break;
#endif /* RTC_TAMPER3_SUPPORT */

      case HAL_RTC_MSPINIT_CB_ID :
        hrtc->MspInitCallback = HAL_RTC_MspInit;
        break;

      case HAL_RTC_MSPDEINIT_CB_ID :
        hrtc->MspDeInitCallback = HAL_RTC_MspDeInit;
        break;

      default :
        /* Return error status */
        status =  HAL_ERROR;
        break;
    }
  }
  else if (HAL_RTC_STATE_RESET == hrtc->State)
  {
    switch (CallbackID)
    {
      case HAL_RTC_MSPINIT_CB_ID :
        hrtc->MspInitCallback = HAL_RTC_MspInit;
        break;

      case HAL_RTC_MSPDEINIT_CB_ID :
        hrtc->MspDeInitCallback = HAL_RTC_MspDeInit;
        break;

      default :
        /* Return error status */
        status =  HAL_ERROR;
        break;
    }
  }
  else
  {
    /* Return error status */
    status =  HAL_ERROR;
  }

  /* Release Lock */
  __HAL_UNLOCK(hrtc);

  return status;
}
#endif /* USE_HAL_RTC_REGISTER_CALLBACKS */

__weak void HAL_RTC_MspInit(RTC_HandleTypeDef *hrtc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hrtc);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_RTC_MspInit could be implemented in the user file
   */
}

__weak void HAL_RTC_MspDeInit(RTC_HandleTypeDef *hrtc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hrtc);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_RTC_MspDeInit could be implemented in the user file
   */
}

HAL_StatusTypeDef HAL_RTC_SetTime(RTC_HandleTypeDef *hrtc, RTC_TimeTypeDef *sTime, uint32_t Format)
{
  uint32_t tmpreg;
  HAL_StatusTypeDef status;

  /* Check the parameters */
  assert_param(IS_RTC_FORMAT(Format));
  assert_param(IS_RTC_DAYLIGHT_SAVING(sTime->DayLightSaving));
  assert_param(IS_RTC_STORE_OPERATION(sTime->StoreOperation));

  /* Process Locked */
  __HAL_LOCK(hrtc);

  hrtc->State = HAL_RTC_STATE_BUSY;

  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);

  /* Enter Initialization mode */
  status = RTC_EnterInitMode(hrtc);
  if (status == HAL_OK)
  {
    if (Format == RTC_FORMAT_BIN)
    {
      if ((hrtc->Instance->CR & RTC_CR_FMT) != 0U)
      {
        assert_param(IS_RTC_HOUR12(sTime->Hours));
        assert_param(IS_RTC_HOURFORMAT12(sTime->TimeFormat));
      }
      else
      {
        sTime->TimeFormat = 0x00U;
        assert_param(IS_RTC_HOUR24(sTime->Hours));
      }
      assert_param(IS_RTC_MINUTES(sTime->Minutes));
      assert_param(IS_RTC_SECONDS(sTime->Seconds));

      tmpreg = (uint32_t)(((uint32_t)RTC_ByteToBcd2(sTime->Hours) << RTC_TR_HU_Pos) | \
                          ((uint32_t)RTC_ByteToBcd2(sTime->Minutes) << RTC_TR_MNU_Pos) | \
                          ((uint32_t)RTC_ByteToBcd2(sTime->Seconds) << RTC_TR_SU_Pos) | \
                          (((uint32_t)sTime->TimeFormat) << RTC_TR_PM_Pos));
    }
    else
    {
      if ((hrtc->Instance->CR & RTC_CR_FMT) != 0U)
      {
        assert_param(IS_RTC_HOUR12(RTC_Bcd2ToByte(sTime->Hours)));
        assert_param(IS_RTC_HOURFORMAT12(sTime->TimeFormat));
      }
      else
      {
        sTime->TimeFormat = 0x00U;
        assert_param(IS_RTC_HOUR24(RTC_Bcd2ToByte(sTime->Hours)));
      }
      assert_param(IS_RTC_MINUTES(RTC_Bcd2ToByte(sTime->Minutes)));
      assert_param(IS_RTC_SECONDS(RTC_Bcd2ToByte(sTime->Seconds)));
      tmpreg = (((uint32_t)(sTime->Hours) << RTC_TR_HU_Pos) | \
                ((uint32_t)(sTime->Minutes) << RTC_TR_MNU_Pos) | \
                ((uint32_t)(sTime->Seconds) << RTC_TR_SU_Pos) | \
                ((uint32_t)(sTime->TimeFormat) << RTC_TR_PM_Pos));
    }

    /* Set the RTC_TR register */
    hrtc->Instance->TR = (uint32_t)(tmpreg & RTC_TR_RESERVED_MASK);

    /* Clear the bits to be configured */
    hrtc->Instance->CR &= ((uint32_t)~RTC_CR_BKP);

    /* Configure the RTC_CR register */
    hrtc->Instance->CR |= (uint32_t)(sTime->DayLightSaving | sTime->StoreOperation);

    /* Exit Initialization mode */
    status = RTC_ExitInitMode(hrtc);
  }

  /* Enable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

  if (status == HAL_OK)
  {
    hrtc->State = HAL_RTC_STATE_READY;
  }

  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);

  return status;
}

HAL_StatusTypeDef HAL_RTC_GetTime(RTC_HandleTypeDef *hrtc, RTC_TimeTypeDef *sTime, uint32_t Format)
{
  uint32_t tmpreg;

  /* Check the parameters */
  assert_param(IS_RTC_FORMAT(Format));

  /* Get subseconds structure field from the corresponding register*/
  sTime->SubSeconds = (uint32_t)(hrtc->Instance->SSR);

  /* Get SecondFraction structure field from the corresponding register field*/
  sTime->SecondFraction = (uint32_t)(hrtc->Instance->PRER & RTC_PRER_PREDIV_S);

  /* Get the TR register */
  tmpreg = (uint32_t)(hrtc->Instance->TR & RTC_TR_RESERVED_MASK);

  /* Fill the structure fields with the read parameters */
  sTime->Hours = (uint8_t)((tmpreg & (RTC_TR_HT | RTC_TR_HU)) >> RTC_TR_HU_Pos);
  sTime->Minutes = (uint8_t)((tmpreg & (RTC_TR_MNT | RTC_TR_MNU)) >> RTC_TR_MNU_Pos);
  sTime->Seconds = (uint8_t)((tmpreg & (RTC_TR_ST | RTC_TR_SU)) >> RTC_TR_SU_Pos);
  sTime->TimeFormat = (uint8_t)((tmpreg & (RTC_TR_PM)) >> RTC_TR_PM_Pos);

  /* Check the input parameters format */
  if (Format == RTC_FORMAT_BIN)
  {
    /* Convert the time structure parameters to Binary format */
    sTime->Hours = (uint8_t)RTC_Bcd2ToByte(sTime->Hours);
    sTime->Minutes = (uint8_t)RTC_Bcd2ToByte(sTime->Minutes);
    sTime->Seconds = (uint8_t)RTC_Bcd2ToByte(sTime->Seconds);
  }

  return HAL_OK;
}

HAL_StatusTypeDef HAL_RTC_SetDate(RTC_HandleTypeDef *hrtc, RTC_DateTypeDef *sDate, uint32_t Format)
{
  uint32_t datetmpreg;
  HAL_StatusTypeDef status;

  /* Check the parameters */
  assert_param(IS_RTC_FORMAT(Format));

  /* Process Locked */
  __HAL_LOCK(hrtc);

  hrtc->State = HAL_RTC_STATE_BUSY;

  if ((Format == RTC_FORMAT_BIN) && ((sDate->Month & 0x10U) == 0x10U))
  {
    sDate->Month = (uint8_t)((sDate->Month & (uint8_t)~(0x10U)) + (uint8_t)0x0AU);
  }

  assert_param(IS_RTC_WEEKDAY(sDate->WeekDay));

  if (Format == RTC_FORMAT_BIN)
  {
    assert_param(IS_RTC_YEAR(sDate->Year));
    assert_param(IS_RTC_MONTH(sDate->Month));
    assert_param(IS_RTC_DATE(sDate->Date));

    datetmpreg = (((uint32_t)RTC_ByteToBcd2(sDate->Year) << RTC_DR_YU_Pos) | \
                  ((uint32_t)RTC_ByteToBcd2(sDate->Month) << RTC_DR_MU_Pos) | \
                  ((uint32_t)RTC_ByteToBcd2(sDate->Date) << RTC_DR_DU_Pos) | \
                  ((uint32_t)sDate->WeekDay << RTC_DR_WDU_Pos));
  }
  else
  {
    assert_param(IS_RTC_YEAR(RTC_Bcd2ToByte(sDate->Year)));
    assert_param(IS_RTC_MONTH(RTC_Bcd2ToByte(sDate->Month)));
    assert_param(IS_RTC_DATE(RTC_Bcd2ToByte(sDate->Date)));

    datetmpreg = ((((uint32_t)sDate->Year) << RTC_DR_YU_Pos) | \
                  (((uint32_t)sDate->Month) << RTC_DR_MU_Pos) | \
                  (((uint32_t)sDate->Date) << RTC_DR_DU_Pos) | \
                  (((uint32_t)sDate->WeekDay) << RTC_DR_WDU_Pos));
  }

  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);

  /* Enter Initialization mode */
  status = RTC_EnterInitMode(hrtc);
  if (status == HAL_OK)
  {
    /* Set the RTC_DR register */
    hrtc->Instance->DR = (uint32_t)(datetmpreg & RTC_DR_RESERVED_MASK);

    /* Exit Initialization mode */
    status = RTC_ExitInitMode(hrtc);
  }

  /* Enable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

  if (status == HAL_OK)
  {
    hrtc->State = HAL_RTC_STATE_READY ;
  }

  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);

  return status;
}

HAL_StatusTypeDef HAL_RTC_GetDate(RTC_HandleTypeDef *hrtc, RTC_DateTypeDef *sDate, uint32_t Format)
{
  uint32_t datetmpreg;

  /* Check the parameters */
  assert_param(IS_RTC_FORMAT(Format));

  /* Get the DR register */
  datetmpreg = (uint32_t)(hrtc->Instance->DR & RTC_DR_RESERVED_MASK);

  /* Fill the structure fields with the read parameters */
  sDate->Year = (uint8_t)((datetmpreg & (RTC_DR_YT | RTC_DR_YU)) >> RTC_DR_YU_Pos);
  sDate->Month = (uint8_t)((datetmpreg & (RTC_DR_MT | RTC_DR_MU)) >> RTC_DR_MU_Pos);
  sDate->Date = (uint8_t)((datetmpreg & (RTC_DR_DT | RTC_DR_DU)) >> RTC_DR_DU_Pos);
  sDate->WeekDay = (uint8_t)((datetmpreg & (RTC_DR_WDU)) >> RTC_DR_WDU_Pos);

  /* Check the input parameters format */
  if (Format == RTC_FORMAT_BIN)
  {
    /* Convert the date structure parameters to Binary format */
    sDate->Year = (uint8_t)RTC_Bcd2ToByte(sDate->Year);
    sDate->Month = (uint8_t)RTC_Bcd2ToByte(sDate->Month);
    sDate->Date = (uint8_t)RTC_Bcd2ToByte(sDate->Date);
  }
  return HAL_OK;
}

HAL_StatusTypeDef HAL_RTC_SetAlarm(RTC_HandleTypeDef *hrtc, RTC_AlarmTypeDef *sAlarm, uint32_t Format)
{
  uint32_t tmpreg, subsecondtmpreg;

  /* Check the parameters */
  assert_param(IS_RTC_FORMAT(Format));
  assert_param(IS_RTC_ALARM(sAlarm->Alarm));
  assert_param(IS_RTC_ALARM_MASK(sAlarm->AlarmMask));
  assert_param(IS_RTC_ALARM_DATE_WEEKDAY_SEL(sAlarm->AlarmDateWeekDaySel));
  assert_param(IS_RTC_ALARM_SUB_SECOND_VALUE(sAlarm->AlarmTime.SubSeconds));
  assert_param(IS_RTC_ALARM_SUB_SECOND_MASK(sAlarm->AlarmSubSecondMask));

  /* Process Locked */
  __HAL_LOCK(hrtc);

  hrtc->State = HAL_RTC_STATE_BUSY;

  if (Format == RTC_FORMAT_BIN)
  {
    if ((hrtc->Instance->CR & RTC_CR_FMT) != 0U)
    {
      assert_param(IS_RTC_HOUR12(sAlarm->AlarmTime.Hours));
      assert_param(IS_RTC_HOURFORMAT12(sAlarm->AlarmTime.TimeFormat));
    }
    else
    {
      sAlarm->AlarmTime.TimeFormat = 0x00U;
      assert_param(IS_RTC_HOUR24(sAlarm->AlarmTime.Hours));
    }
    assert_param(IS_RTC_MINUTES(sAlarm->AlarmTime.Minutes));
    assert_param(IS_RTC_SECONDS(sAlarm->AlarmTime.Seconds));

    if (sAlarm->AlarmDateWeekDaySel == RTC_ALARMDATEWEEKDAYSEL_DATE)
    {
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_DATE(sAlarm->AlarmDateWeekDay));
    }
    else
    {
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_WEEKDAY(sAlarm->AlarmDateWeekDay));
    }
    tmpreg = (((uint32_t)RTC_ByteToBcd2(sAlarm->AlarmTime.Hours) << RTC_ALRMAR_HU_Pos) | \
              ((uint32_t)RTC_ByteToBcd2(sAlarm->AlarmTime.Minutes) << RTC_ALRMAR_MNU_Pos) | \
              ((uint32_t)RTC_ByteToBcd2(sAlarm->AlarmTime.Seconds) << RTC_ALRMAR_SU_Pos) | \
              ((uint32_t)(sAlarm->AlarmTime.TimeFormat) << RTC_ALRMAR_PM_Pos) | \
              ((uint32_t)RTC_ByteToBcd2(sAlarm->AlarmDateWeekDay) << RTC_ALRMAR_DU_Pos) | \
              ((uint32_t)sAlarm->AlarmDateWeekDaySel) | \
              ((uint32_t)sAlarm->AlarmMask));
  }
  else
  {
    if ((hrtc->Instance->CR & RTC_CR_FMT) != 0U)
    {
      assert_param(IS_RTC_HOUR12(RTC_Bcd2ToByte(sAlarm->AlarmTime.Hours)));
      assert_param(IS_RTC_HOURFORMAT12(sAlarm->AlarmTime.TimeFormat));
    }
    else
    {
      sAlarm->AlarmTime.TimeFormat = 0x00U;
      assert_param(IS_RTC_HOUR24(RTC_Bcd2ToByte(sAlarm->AlarmTime.Hours)));
    }

    assert_param(IS_RTC_MINUTES(RTC_Bcd2ToByte(sAlarm->AlarmTime.Minutes)));
    assert_param(IS_RTC_SECONDS(RTC_Bcd2ToByte(sAlarm->AlarmTime.Seconds)));

#ifdef  USE_FULL_ASSERT
    if (sAlarm->AlarmDateWeekDaySel == RTC_ALARMDATEWEEKDAYSEL_DATE)
    {
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_DATE(RTC_Bcd2ToByte(sAlarm->AlarmDateWeekDay)));
    }
    else
    {
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_WEEKDAY(RTC_Bcd2ToByte(sAlarm->AlarmDateWeekDay)));
    }

#endif /* USE_FULL_ASSERT */
    tmpreg = (((uint32_t)(sAlarm->AlarmTime.Hours) << RTC_ALRMAR_HU_Pos) | \
              ((uint32_t)(sAlarm->AlarmTime.Minutes) << RTC_ALRMAR_MNU_Pos) | \
              ((uint32_t)(sAlarm->AlarmTime.Seconds) << RTC_ALRMAR_SU_Pos) | \
              ((uint32_t)(sAlarm->AlarmTime.TimeFormat) << RTC_ALRMAR_PM_Pos) | \
              ((uint32_t)(sAlarm->AlarmDateWeekDay) << RTC_ALRMAR_DU_Pos) | \
              ((uint32_t)sAlarm->AlarmDateWeekDaySel) | \
              ((uint32_t)sAlarm->AlarmMask));
  }

  /* Configure the Alarm A or Alarm B Sub Second registers */
  subsecondtmpreg = (uint32_t)((uint32_t)(sAlarm->AlarmTime.SubSeconds) | (uint32_t)(sAlarm->AlarmSubSecondMask));

  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);

  /* Configure the Alarm register */
  if (sAlarm->Alarm == RTC_ALARM_A)
  {
    /* Disable the Alarm A interrupt */
    __HAL_RTC_ALARMA_DISABLE(hrtc);
    /* Clear flag alarm A */
    __HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRAF);
    /* In case of interrupt mode is used, the interrupt source must disabled */
    __HAL_RTC_ALARM_DISABLE_IT(hrtc, RTC_IT_ALRA);

#if defined (RTC_FLAG_ALRAWF)
    uint32_t tickstart = HAL_GetTick();
    /* Wait till RTC ALRAWF flag is set and if Time out is reached exit */
    while (__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRAWF) == 0U)
    {
      if ((HAL_GetTick() - tickstart) > RTC_TIMEOUT_VALUE)
      {
        /* Enable the write protection for RTC registers */
        __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

        hrtc->State = HAL_RTC_STATE_TIMEOUT;

        /* Process Unlocked */
        __HAL_UNLOCK(hrtc);

        return HAL_TIMEOUT;
      }
    }
#endif

    hrtc->Instance->ALRMAR = (uint32_t)tmpreg;
    /* Configure the Alarm A Sub Second register */
    hrtc->Instance->ALRMASSR = subsecondtmpreg;
    /* Configure the Alarm state: Enable Alarm */
    __HAL_RTC_ALARMA_ENABLE(hrtc);
  }
  else
  {
    /* Disable the Alarm B interrupt */
    __HAL_RTC_ALARMB_DISABLE(hrtc);
    /* Clear flag alarm B */
    __HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRBF);
    /* In case of interrupt mode is used, the interrupt source must disabled */
    __HAL_RTC_ALARM_DISABLE_IT(hrtc, RTC_IT_ALRB);

#if defined (RTC_FLAG_ALRBWF)
    uint32_t tickstart = HAL_GetTick();
    /* Wait till RTC ALRBWF flag is set and if Time out is reached exit */
    while (__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRBWF) == 0U)
    {
      if ((HAL_GetTick() - tickstart) > RTC_TIMEOUT_VALUE)
      {
        /* Enable the write protection for RTC registers */
        __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

        hrtc->State = HAL_RTC_STATE_TIMEOUT;

        /* Process Unlocked */
        __HAL_UNLOCK(hrtc);

        return HAL_TIMEOUT;
      }
    }
#endif

    hrtc->Instance->ALRMBR = (uint32_t)tmpreg;
    /* Configure the Alarm B Sub Second register */
    hrtc->Instance->ALRMBSSR = subsecondtmpreg;
    /* Configure the Alarm state: Enable Alarm */
    __HAL_RTC_ALARMB_ENABLE(hrtc);
  }

  /* Enable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

  /* Change RTC state */
  hrtc->State = HAL_RTC_STATE_READY;

  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);

  return HAL_OK;
}

HAL_StatusTypeDef HAL_RTC_SetAlarm_IT(RTC_HandleTypeDef *hrtc, RTC_AlarmTypeDef *sAlarm, uint32_t Format)
{
  uint32_t tmpreg, subsecondtmpreg;

  /* Check the parameters */
  assert_param(IS_RTC_FORMAT(Format));
  assert_param(IS_RTC_ALARM(sAlarm->Alarm));
  assert_param(IS_RTC_ALARM_MASK(sAlarm->AlarmMask));
  assert_param(IS_RTC_ALARM_DATE_WEEKDAY_SEL(sAlarm->AlarmDateWeekDaySel));
  assert_param(IS_RTC_ALARM_SUB_SECOND_VALUE(sAlarm->AlarmTime.SubSeconds));
  assert_param(IS_RTC_ALARM_SUB_SECOND_MASK(sAlarm->AlarmSubSecondMask));

  /* Process Locked */
  __HAL_LOCK(hrtc);

  hrtc->State = HAL_RTC_STATE_BUSY;

  if (Format == RTC_FORMAT_BIN)
  {
    if ((hrtc->Instance->CR & RTC_CR_FMT) != 0U)
    {
      assert_param(IS_RTC_HOUR12(sAlarm->AlarmTime.Hours));
      assert_param(IS_RTC_HOURFORMAT12(sAlarm->AlarmTime.TimeFormat));
    }
    else
    {
      sAlarm->AlarmTime.TimeFormat = 0x00U;
      assert_param(IS_RTC_HOUR24(sAlarm->AlarmTime.Hours));
    }
    assert_param(IS_RTC_MINUTES(sAlarm->AlarmTime.Minutes));
    assert_param(IS_RTC_SECONDS(sAlarm->AlarmTime.Seconds));

    if (sAlarm->AlarmDateWeekDaySel == RTC_ALARMDATEWEEKDAYSEL_DATE)
    {
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_DATE(sAlarm->AlarmDateWeekDay));
    }
    else
    {
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_WEEKDAY(sAlarm->AlarmDateWeekDay));
    }

    tmpreg = (((uint32_t)RTC_ByteToBcd2(sAlarm->AlarmTime.Hours) << RTC_ALRMAR_HU_Pos) | \
              ((uint32_t)RTC_ByteToBcd2(sAlarm->AlarmTime.Minutes) << RTC_ALRMAR_MNU_Pos) | \
              ((uint32_t)RTC_ByteToBcd2(sAlarm->AlarmTime.Seconds) << RTC_ALRMAR_SU_Pos) | \
              ((uint32_t)(sAlarm->AlarmTime.TimeFormat) << RTC_ALRMAR_PM_Pos) | \
              ((uint32_t)RTC_ByteToBcd2(sAlarm->AlarmDateWeekDay) << RTC_ALRMAR_DU_Pos) | \
              ((uint32_t)sAlarm->AlarmDateWeekDaySel) | \
              ((uint32_t)sAlarm->AlarmMask));
  }
  else
  {
    if ((hrtc->Instance->CR & RTC_CR_FMT) != 0U)
    {
      assert_param(IS_RTC_HOUR12(RTC_Bcd2ToByte(sAlarm->AlarmTime.Hours)));
      assert_param(IS_RTC_HOURFORMAT12(sAlarm->AlarmTime.TimeFormat));
    }
    else
    {
      sAlarm->AlarmTime.TimeFormat = 0x00U;
      assert_param(IS_RTC_HOUR24(RTC_Bcd2ToByte(sAlarm->AlarmTime.Hours)));
    }

    assert_param(IS_RTC_MINUTES(RTC_Bcd2ToByte(sAlarm->AlarmTime.Minutes)));
    assert_param(IS_RTC_SECONDS(RTC_Bcd2ToByte(sAlarm->AlarmTime.Seconds)));

#ifdef  USE_FULL_ASSERT
    if (sAlarm->AlarmDateWeekDaySel == RTC_ALARMDATEWEEKDAYSEL_DATE)
    {
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_DATE(RTC_Bcd2ToByte(sAlarm->AlarmDateWeekDay)));
    }
    else
    {
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_WEEKDAY(RTC_Bcd2ToByte(sAlarm->AlarmDateWeekDay)));
    }

#endif /* USE_FULL_ASSERT */
    tmpreg = (((uint32_t)(sAlarm->AlarmTime.Hours) << RTC_ALRMAR_HU_Pos) | \
              ((uint32_t)(sAlarm->AlarmTime.Minutes) << RTC_ALRMAR_MNU_Pos) | \
              ((uint32_t)(sAlarm->AlarmTime.Seconds) << RTC_ALRMAR_SU_Pos) | \
              ((uint32_t)(sAlarm->AlarmTime.TimeFormat) << RTC_ALRMAR_PM_Pos) | \
              ((uint32_t)(sAlarm->AlarmDateWeekDay) << RTC_ALRMAR_DU_Pos) | \
              ((uint32_t)sAlarm->AlarmDateWeekDaySel) | \
              ((uint32_t)sAlarm->AlarmMask));
  }
  /* Configure the Alarm A or Alarm B Sub Second registers */
  subsecondtmpreg = (uint32_t)((uint32_t)(sAlarm->AlarmTime.SubSeconds) | (uint32_t)(sAlarm->AlarmSubSecondMask));

  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);

  /* Configure the Alarm register */
  if (sAlarm->Alarm == RTC_ALARM_A)
  {
    /* Disable the Alarm A interrupt */
    __HAL_RTC_ALARMA_DISABLE(hrtc);

    /* Clear flag alarm A */
    __HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRAF);

#if defined (RTC_FLAG_ALRAWF)
    uint32_t tickstart = HAL_GetTick();
    /* Wait till RTC ALRAWF flag is set and if Time out is reached exit */
    while (__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRAWF) == 0U)
    {
      if ((HAL_GetTick() - tickstart) > RTC_TIMEOUT_VALUE)
      {
        /* Enable the write protection for RTC registers */
        __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

        hrtc->State = HAL_RTC_STATE_TIMEOUT;

        /* Process Unlocked */
        __HAL_UNLOCK(hrtc);

        return HAL_TIMEOUT;
      }
    }
#endif

    hrtc->Instance->ALRMAR = (uint32_t)tmpreg;
    /* Configure the Alarm A Sub Second register */
    hrtc->Instance->ALRMASSR = subsecondtmpreg;
    /* Configure the Alarm state: Enable Alarm */
    __HAL_RTC_ALARMA_ENABLE(hrtc);
    /* Configure the Alarm interrupt */
    __HAL_RTC_ALARM_ENABLE_IT(hrtc, RTC_IT_ALRA);
  }
  else
  {
    /* Disable the Alarm B interrupt */
    __HAL_RTC_ALARMB_DISABLE(hrtc);

    /* Clear flag alarm B */
    __HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRBF);

#if defined (RTC_FLAG_ALRBWF)
    uint32_t tickstart = HAL_GetTick();
    /* Wait till RTC ALRBWF flag is set and if Time out is reached exit */
    while (__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRBWF) == 0U)
    {
      if ((HAL_GetTick() - tickstart) > RTC_TIMEOUT_VALUE)
      {
        /* Enable the write protection for RTC registers */
        __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

        hrtc->State = HAL_RTC_STATE_TIMEOUT;

        /* Process Unlocked */
        __HAL_UNLOCK(hrtc);

        return HAL_TIMEOUT;
      }
    }
#endif

    hrtc->Instance->ALRMBR = (uint32_t)tmpreg;
    /* Configure the Alarm B Sub Second register */
    hrtc->Instance->ALRMBSSR = subsecondtmpreg;
    /* Configure the Alarm state: Enable Alarm */
    __HAL_RTC_ALARMB_ENABLE(hrtc);
    /* Configure the Alarm interrupt */
    __HAL_RTC_ALARM_ENABLE_IT(hrtc, RTC_IT_ALRB);
  }

  /* RTC Alarm Interrupt Configuration: EXTI configuration */
  __HAL_RTC_ALARM_EXTI_ENABLE_IT();
  __HAL_RTC_ALARM_EXTI_ENABLE_RISING_EDGE();

  /* Enable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

  hrtc->State = HAL_RTC_STATE_READY;

  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);

  return HAL_OK;
}

HAL_StatusTypeDef HAL_RTC_DeactivateAlarm(RTC_HandleTypeDef *hrtc, uint32_t Alarm)
{
  /* Check the parameters */
  assert_param(IS_RTC_ALARM(Alarm));

  /* Process Locked */
  __HAL_LOCK(hrtc);

  hrtc->State = HAL_RTC_STATE_BUSY;

  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);

  if (Alarm == RTC_ALARM_A)
  {
    /* AlarmA */
    __HAL_RTC_ALARMA_DISABLE(hrtc);

    /* In case of interrupt mode is used, the interrupt source must disabled */
    __HAL_RTC_ALARM_DISABLE_IT(hrtc, RTC_IT_ALRA);

#if defined (RTC_FLAG_ALRAWF)
    uint32_t tickstart = HAL_GetTick();
    /* Wait till RTC ALRxWF flag is set and if Time out is reached exit */
    while (__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRAWF) == 0U)
    {
      if ((HAL_GetTick()  - tickstart) > RTC_TIMEOUT_VALUE)
      {
        /* Enable the write protection for RTC registers */
        __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

        hrtc->State = HAL_RTC_STATE_TIMEOUT;

        /* Process Unlocked */
        __HAL_UNLOCK(hrtc);

        return HAL_TIMEOUT;
      }
    }
#endif
  }
  else
  {
    /* AlarmB */
    __HAL_RTC_ALARMB_DISABLE(hrtc);

    /* In case of interrupt mode is used, the interrupt source must disabled */
    __HAL_RTC_ALARM_DISABLE_IT(hrtc, RTC_IT_ALRB);

#if defined (RTC_FLAG_ALRBWF)
    uint32_t tickstart = HAL_GetTick();
    /* Wait till RTC ALRBWF flag is set and if Time out is reached exit */
    while (__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRBWF) == 0U)
    {
      if ((HAL_GetTick() - tickstart) > RTC_TIMEOUT_VALUE)
      {
        /* Enable the write protection for RTC registers */
        __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

        hrtc->State = HAL_RTC_STATE_TIMEOUT;

        /* Process Unlocked */
        __HAL_UNLOCK(hrtc);

        return HAL_TIMEOUT;
      }
    }
#endif
  }
  /* Enable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);

  hrtc->State = HAL_RTC_STATE_READY;

  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);

  return HAL_OK;
}

HAL_StatusTypeDef HAL_RTC_GetAlarm(RTC_HandleTypeDef *hrtc, RTC_AlarmTypeDef *sAlarm, uint32_t Alarm, uint32_t Format)
{
  uint32_t tmpreg, subsecondtmpreg;

  /* Check the parameters */
  assert_param(IS_RTC_FORMAT(Format));
  assert_param(IS_RTC_ALARM(Alarm));

  if (Alarm == RTC_ALARM_A)
  {
    /* AlarmA */
    sAlarm->Alarm = RTC_ALARM_A;

    tmpreg = (uint32_t)(hrtc->Instance->ALRMAR);
    subsecondtmpreg = (uint32_t)((hrtc->Instance->ALRMASSR) & RTC_ALRMASSR_SS);

    /* Fill the structure with the read parameters */
    sAlarm->AlarmTime.Hours = (uint8_t)((tmpreg & (RTC_ALRMAR_HT | RTC_ALRMAR_HU)) >> RTC_ALRMAR_HU_Pos);
    sAlarm->AlarmTime.Minutes = (uint8_t)((tmpreg & (RTC_ALRMAR_MNT | RTC_ALRMAR_MNU)) >> RTC_ALRMAR_MNU_Pos);
    sAlarm->AlarmTime.Seconds = (uint8_t)((tmpreg & (RTC_ALRMAR_ST | RTC_ALRMAR_SU)) >> RTC_ALRMAR_SU_Pos);
    sAlarm->AlarmTime.TimeFormat = (uint8_t)((tmpreg & RTC_ALRMAR_PM) >> RTC_ALRMAR_PM_Pos);
    sAlarm->AlarmTime.SubSeconds = (uint32_t) subsecondtmpreg;
    sAlarm->AlarmDateWeekDay = (uint8_t)((tmpreg & (RTC_ALRMAR_DT | RTC_ALRMAR_DU)) >> RTC_ALRMAR_DU_Pos);
    sAlarm->AlarmDateWeekDaySel = (uint32_t)(tmpreg & RTC_ALRMAR_WDSEL);
    sAlarm->AlarmMask = (uint32_t)(tmpreg & RTC_ALARMMASK_ALL);
  }
  else
  {
    sAlarm->Alarm = RTC_ALARM_B;

    tmpreg = (uint32_t)(hrtc->Instance->ALRMBR);
    subsecondtmpreg = (uint32_t)((hrtc->Instance->ALRMBSSR) & RTC_ALRMBSSR_SS);

    /* Fill the structure with the read parameters */
    sAlarm->AlarmTime.Hours = (uint8_t)((tmpreg & (RTC_ALRMBR_HT | RTC_ALRMBR_HU)) >> RTC_ALRMBR_HU_Pos);
    sAlarm->AlarmTime.Minutes = (uint8_t)((tmpreg & (RTC_ALRMBR_MNT | RTC_ALRMBR_MNU)) >> RTC_ALRMBR_MNU_Pos);
    sAlarm->AlarmTime.Seconds = (uint8_t)((tmpreg & (RTC_ALRMBR_ST | RTC_ALRMBR_SU)) >> RTC_ALRMBR_SU_Pos);
    sAlarm->AlarmTime.TimeFormat = (uint8_t)((tmpreg & RTC_ALRMBR_PM) >> RTC_ALRMBR_PM_Pos);
    sAlarm->AlarmTime.SubSeconds = (uint32_t) subsecondtmpreg;
    sAlarm->AlarmDateWeekDay = (uint8_t)((tmpreg & (RTC_ALRMBR_DT | RTC_ALRMBR_DU)) >> RTC_ALRMBR_DU_Pos);
    sAlarm->AlarmDateWeekDaySel = (uint32_t)(tmpreg & RTC_ALRMBR_WDSEL);
    sAlarm->AlarmMask = (uint32_t)(tmpreg & RTC_ALARMMASK_ALL);
  }

  if (Format == RTC_FORMAT_BIN)
  {
    sAlarm->AlarmTime.Hours = RTC_Bcd2ToByte(sAlarm->AlarmTime.Hours);
    sAlarm->AlarmTime.Minutes = RTC_Bcd2ToByte(sAlarm->AlarmTime.Minutes);
    sAlarm->AlarmTime.Seconds = RTC_Bcd2ToByte(sAlarm->AlarmTime.Seconds);
    sAlarm->AlarmDateWeekDay = RTC_Bcd2ToByte(sAlarm->AlarmDateWeekDay);
  }

  return HAL_OK;
}

void HAL_RTC_AlarmIRQHandler(RTC_HandleTypeDef *hrtc)
{
  /* Clear the EXTI's line Flag for RTC Alarm */
  __HAL_RTC_ALARM_EXTI_CLEAR_FLAG();

#if defined(STM32L412xx) || defined(STM32L422xx)
  /* Get interrupt status */
  uint32_t tmp = hrtc->Instance->MISR;

  if ((tmp & RTC_MISR_ALRAMF) != 0u)
  {
    /* Clear the AlarmA interrupt pending bit */
    hrtc->Instance->SCR = RTC_SCR_CALRAF;

#if (USE_HAL_RTC_REGISTER_CALLBACKS == 1)
    /* Call Compare Match registered Callback */
    hrtc->AlarmAEventCallback(hrtc);
#else  /* (USE_HAL_RTC_REGISTER_CALLBACKS == 1) */
    HAL_RTC_AlarmAEventCallback(hrtc);
#endif /* (USE_HAL_RTC_REGISTER_CALLBACKS == 1) */
  }

  if ((tmp & RTC_MISR_ALRBMF) != 0u)
  {
    /* Clear the AlarmB interrupt pending bit */
    hrtc->Instance->SCR = RTC_SCR_CALRBF;

#if (USE_HAL_RTC_REGISTER_CALLBACKS == 1)
    /* Call Compare Match registered Callback */
    hrtc->AlarmBEventCallback(hrtc);
#else
    HAL_RTCEx_AlarmBEventCallback(hrtc);
#endif
  }

#else /* #if defined(STM32L412xx) || defined(STM32L422xx) */

  /* Get the AlarmA interrupt source enable status */
  if (__HAL_RTC_ALARM_GET_IT_SOURCE(hrtc, RTC_IT_ALRA) != 0U)
  {
    /* Get the pending status of the AlarmA Interrupt */
    if (__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRAF) != 0U)
    {
      /* Clear the AlarmA interrupt pending bit */
      __HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRAF);

#if (USE_HAL_RTC_REGISTER_CALLBACKS == 1)
      hrtc->AlarmAEventCallback(hrtc);
#else
      HAL_RTC_AlarmAEventCallback(hrtc);
#endif
    }
  }

  /* Get the AlarmB interrupt source enable status */
  if (__HAL_RTC_ALARM_GET_IT_SOURCE(hrtc, RTC_IT_ALRB) != 0U)
  {
    /* Get the pending status of the AlarmB Interrupt */
    if (__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRBF) != 0U)
    {
      /* Clear the AlarmB interrupt pending bit */
      __HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRBF);

#if (USE_HAL_RTC_REGISTER_CALLBACKS == 1)
      hrtc->AlarmBEventCallback(hrtc);
#else
      HAL_RTCEx_AlarmBEventCallback(hrtc);
#endif
    }
  }
#endif /* #if defined(STM32L412xx) || defined(STM32L422xx) */

  /* Change RTC state */
  hrtc->State = HAL_RTC_STATE_READY;
}

__weak void HAL_RTC_AlarmAEventCallback(RTC_HandleTypeDef *hrtc)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hrtc);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_RTC_AlarmAEventCallback could be implemented in the user file
   */
}

HAL_StatusTypeDef HAL_RTC_PollForAlarmAEvent(RTC_HandleTypeDef *hrtc, uint32_t Timeout)
{

  uint32_t tickstart = HAL_GetTick();

  while (__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRAF) == 0U)
  {
    if (Timeout != HAL_MAX_DELAY)
    {
      if (((HAL_GetTick() - tickstart) > Timeout) || (Timeout == 0U))
      {
        hrtc->State = HAL_RTC_STATE_TIMEOUT;
        return HAL_TIMEOUT;
      }
    }
  }

  /* Clear the Alarm interrupt pending bit */
  __HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRAF);

  /* Change RTC state */
  hrtc->State = HAL_RTC_STATE_READY;

  return HAL_OK;
}

HAL_StatusTypeDef HAL_RTC_WaitForSynchro(RTC_HandleTypeDef *hrtc)
{
  uint32_t tickstart;

  /* Clear RSF flag */
#if defined(STM32L412xx) || defined(STM32L422xx)
  hrtc->Instance->ICSR &= (uint32_t)RTC_RSF_MASK;
#else
  hrtc->Instance->ISR &= (uint32_t)RTC_RSF_MASK;
#endif

  tickstart = HAL_GetTick();

  /* Wait the registers to be synchronised */
#if defined(STM32L412xx) || defined(STM32L422xx)
  while ((hrtc->Instance->ICSR & RTC_ICSR_RSF) == 0U)
#else
  while ((hrtc->Instance->ISR & RTC_ISR_RSF) == 0U)
#endif
  {
    if ((HAL_GetTick() - tickstart) > RTC_TIMEOUT_VALUE)
    {
      return HAL_TIMEOUT;
    }
  }

  return HAL_OK;
}

HAL_RTCStateTypeDef HAL_RTC_GetState(RTC_HandleTypeDef *hrtc)
{
  /* Return RTC handle state */
  return hrtc->State;
}

HAL_StatusTypeDef RTC_EnterInitMode(RTC_HandleTypeDef *hrtc)
{
  uint32_t tickstart;
  HAL_StatusTypeDef status = HAL_OK;

  /* Check if the Initialization mode is set */
#if defined(STM32L412xx) || defined(STM32L422xx)
  if ((hrtc->Instance->ICSR & RTC_ICSR_INITF) == 0U)
  {
    /* Set the Initialization mode */
    SET_BIT(hrtc->Instance->ICSR, RTC_ICSR_INIT);

    tickstart = HAL_GetTick();
    /* Wait till RTC is in INIT state and if Time out is reached exit */
    while ((READ_BIT(hrtc->Instance->ICSR, RTC_ICSR_INITF) == 0U) && (status != HAL_TIMEOUT))
    {
      if ((HAL_GetTick()  - tickstart) > RTC_TIMEOUT_VALUE)
      {
        status = HAL_TIMEOUT;
        hrtc->State = HAL_RTC_STATE_TIMEOUT;
      }
    }
  }
#else /* #if defined(STM32L412xx) || defined(STM32L422xx) */
  if ((hrtc->Instance->ISR & RTC_ISR_INITF) == 0U)
  {
    /* Set the Initialization mode */
    hrtc->Instance->ISR = (uint32_t)RTC_INIT_MASK;

    tickstart = HAL_GetTick();
    /* Wait till RTC is in INIT state and if Time out is reached exit */
    while ((READ_BIT(hrtc->Instance->ISR, RTC_ISR_INITF) == 0U) && (status != HAL_TIMEOUT))
    {
      if ((HAL_GetTick()  - tickstart) > RTC_TIMEOUT_VALUE)
      {
        status = HAL_TIMEOUT;
        hrtc->State = HAL_RTC_STATE_TIMEOUT;
      }
    }
  }
#endif /* #if defined(STM32L412xx) || defined(STM32L422xx) */

  return status;
}

HAL_StatusTypeDef RTC_ExitInitMode(RTC_HandleTypeDef *hrtc)
{
  HAL_StatusTypeDef status = HAL_OK;

  /* Exit Initialization mode */
#if defined(STM32L412xx) || defined(STM32L422xx)
  CLEAR_BIT(RTC->ICSR, RTC_ICSR_INIT);
#else
  /* Exit Initialization mode */
  CLEAR_BIT(RTC->ISR, RTC_ISR_INIT);
#endif

  /* If CR_BYPSHAD bit = 0, wait for synchro */
  if (READ_BIT(RTC->CR, RTC_CR_BYPSHAD) == 0U)
  {
    if (HAL_RTC_WaitForSynchro(hrtc) != HAL_OK)
    {
      hrtc->State = HAL_RTC_STATE_TIMEOUT;
      status = HAL_TIMEOUT;
    }
  }
  else /* WA 2.9.6 Calendar initialization may fail in case of consecutive INIT mode entry */
  {
    /* Clear BYPSHAD bit */
    CLEAR_BIT(RTC->CR, RTC_CR_BYPSHAD);
    if (HAL_RTC_WaitForSynchro(hrtc) != HAL_OK)
    {
      hrtc->State = HAL_RTC_STATE_TIMEOUT;
      status = HAL_TIMEOUT;
    }
    /* Restore BYPSHAD bit */
    SET_BIT(RTC->CR, RTC_CR_BYPSHAD);
  }

  return status;
}



uint8_t RTC_ByteToBcd2(uint8_t Value)
{
  uint32_t bcdhigh = 0U;
  uint8_t temp = Value;

  while (temp >= 10U)
  {
    bcdhigh++;
    temp -= 10U;
  }

  return ((uint8_t)(bcdhigh << 4U) | temp);
}

uint8_t RTC_Bcd2ToByte(uint8_t Value)
{
  uint8_t tmp;
  tmp = ((Value & 0xF0U) >> 4U) * 10U;
  return (tmp + (Value & 0x0FU));
}

#endif /* HAL_RTC_MODULE_ENABLED */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/