stm32f4xx_hal_rtc_ex.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
 
#ifdef HAL_RTC_MODULE_ENABLED
 
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
 
HAL_StatusTypeDef HAL_RTCEx_SetTimeStamp(RTC_HandleTypeDef *hrtc, uint32_t RTC_TimeStampEdge, uint32_t RTC_TimeStampPin)
{
  uint32_t tmpreg = 0U;
 
  /* Check the parameters */
  assert_param(IS_TIMESTAMP_EDGE(RTC_TimeStampEdge));
  assert_param(IS_RTC_TIMESTAMP_PIN(RTC_TimeStampPin));
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  /* Change RTC state to BUSY */
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  hrtc->Instance->TAFCR &= (uint32_t)~RTC_TAFCR_TSINSEL;
  hrtc->Instance->TAFCR |= (uint32_t)(RTC_TimeStampPin);
 
  /* Get the RTC_CR register and clear the bits to be configured */
  tmpreg = (uint32_t)(hrtc->Instance->CR & (uint32_t)~(RTC_CR_TSEDGE | RTC_CR_TSE));
 
  /* Configure the Timestamp TSEDGE bit */
  tmpreg |= RTC_TimeStampEdge;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  /* Copy the desired configuration into the CR register */
  hrtc->Instance->CR = (uint32_t)tmpreg;
 
  /* Clear RTC Timestamp flag */
  __HAL_RTC_TIMESTAMP_CLEAR_FLAG(hrtc, RTC_FLAG_TSF);
 
  /* Clear RTC Timestamp overrun Flag */
  __HAL_RTC_TIMESTAMP_CLEAR_FLAG(hrtc, RTC_FLAG_TSOVF);
 
  /* Enable the Timestamp saving */
  __HAL_RTC_TIMESTAMP_ENABLE(hrtc);
 
  /* Enable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 
  /* Change RTC state back to READY */
  hrtc->State = HAL_RTC_STATE_READY;
 
  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);
 
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_RTCEx_SetTimeStamp_IT(RTC_HandleTypeDef *hrtc, uint32_t RTC_TimeStampEdge, uint32_t RTC_TimeStampPin)
{
  uint32_t tmpreg = 0U;
 
  /* Check the parameters */
  assert_param(IS_TIMESTAMP_EDGE(RTC_TimeStampEdge));
  assert_param(IS_RTC_TIMESTAMP_PIN(RTC_TimeStampPin));
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  /* Change RTC state to BUSY */
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  hrtc->Instance->TAFCR &= (uint32_t)~RTC_TAFCR_TSINSEL;
  hrtc->Instance->TAFCR |= (uint32_t)(RTC_TimeStampPin);
 
  /* Get the RTC_CR register and clear the bits to be configured */
  tmpreg = (uint32_t)(hrtc->Instance->CR & (uint32_t)~(RTC_CR_TSEDGE | RTC_CR_TSE));
 
  /* Configure the Timestamp TSEDGE bit */
  tmpreg |= RTC_TimeStampEdge;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  /* Copy the desired configuration into the CR register */
  hrtc->Instance->CR = (uint32_t)tmpreg;
 
  /* Clear RTC Timestamp flag */
  __HAL_RTC_TIMESTAMP_CLEAR_FLAG(hrtc, RTC_FLAG_TSF);
 
  /* Clear RTC Timestamp overrun Flag */
  __HAL_RTC_TIMESTAMP_CLEAR_FLAG(hrtc, RTC_FLAG_TSOVF);
 
  /* Enable the Timestamp saving */
  __HAL_RTC_TIMESTAMP_ENABLE(hrtc);
 
  /* Enable IT Timestamp */
  __HAL_RTC_TIMESTAMP_ENABLE_IT(hrtc, RTC_IT_TS);
 
  /* Enable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 
  /* RTC Timestamp Interrupt Configuration: EXTI configuration */
  __HAL_RTC_TAMPER_TIMESTAMP_EXTI_ENABLE_IT();
  __HAL_RTC_TAMPER_TIMESTAMP_EXTI_ENABLE_RISING_EDGE();
 
  /* Change RTC state back to READY */
  hrtc->State = HAL_RTC_STATE_READY;
 
  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);
 
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_RTCEx_DeactivateTimeStamp(RTC_HandleTypeDef *hrtc)
{
  uint32_t tmpreg = 0U;
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  /* In case of interrupt mode is used, the interrupt source must disabled */
  __HAL_RTC_TIMESTAMP_DISABLE_IT(hrtc, RTC_IT_TS);
 
  /* Get the RTC_CR register and clear the bits to be configured */
  tmpreg = (uint32_t)(hrtc->Instance->CR & (uint32_t)~(RTC_CR_TSEDGE | RTC_CR_TSE));
 
  /* Configure the Timestamp TSEDGE and Enable bits */
  hrtc->Instance->CR = (uint32_t)tmpreg;
 
  /* 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_RTCEx_GetTimeStamp(RTC_HandleTypeDef *hrtc, RTC_TimeTypeDef *sTimeStamp, RTC_DateTypeDef *sTimeStampDate, uint32_t Format)
{
  uint32_t tmptime = 0U;
  uint32_t tmpdate = 0U;
 
  /* Check the parameters */
  assert_param(IS_RTC_FORMAT(Format));
 
  /* Get the Timestamp time and date registers values */
  tmptime = (uint32_t)(hrtc->Instance->TSTR & RTC_TR_RESERVED_MASK);
  tmpdate = (uint32_t)(hrtc->Instance->TSDR & RTC_DR_RESERVED_MASK);
 
  /* Fill the Time structure fields with the read parameters */
  sTimeStamp->Hours      = (uint8_t)((tmptime & (RTC_TSTR_HT  | RTC_TSTR_HU))  >> RTC_TSTR_HU_Pos);
  sTimeStamp->Minutes    = (uint8_t)((tmptime & (RTC_TSTR_MNT | RTC_TSTR_MNU)) >> RTC_TSTR_MNU_Pos);
  sTimeStamp->Seconds    = (uint8_t)((tmptime & (RTC_TSTR_ST  | RTC_TSTR_SU))  >> RTC_TSTR_SU_Pos);
  sTimeStamp->TimeFormat = (uint8_t)((tmptime & (RTC_TSTR_PM))                 >> RTC_TSTR_PM_Pos);
  sTimeStamp->SubSeconds = (uint32_t) hrtc->Instance->TSSSR;
 
  /* Fill the Date structure fields with the read parameters */
  sTimeStampDate->Year    = 0U;
  sTimeStampDate->Month   = (uint8_t)((tmpdate & (RTC_TSDR_MT | RTC_TSDR_MU)) >> RTC_TSDR_MU_Pos);
  sTimeStampDate->Date    = (uint8_t)((tmpdate & (RTC_TSDR_DT | RTC_TSDR_DU)) >> RTC_TSDR_DU_Pos);
  sTimeStampDate->WeekDay = (uint8_t)((tmpdate & (RTC_TSDR_WDU))              >> RTC_TSDR_WDU_Pos);
 
  /* Check the input parameters format */
  if (Format == RTC_FORMAT_BIN)
  {
    /* Convert the Timestamp structure parameters to Binary format */
    sTimeStamp->Hours   = (uint8_t)RTC_Bcd2ToByte(sTimeStamp->Hours);
    sTimeStamp->Minutes = (uint8_t)RTC_Bcd2ToByte(sTimeStamp->Minutes);
    sTimeStamp->Seconds = (uint8_t)RTC_Bcd2ToByte(sTimeStamp->Seconds);
 
    /* Convert the DateTimeStamp structure parameters to Binary format */
    sTimeStampDate->Month   = (uint8_t)RTC_Bcd2ToByte(sTimeStampDate->Month);
    sTimeStampDate->Date    = (uint8_t)RTC_Bcd2ToByte(sTimeStampDate->Date);
    sTimeStampDate->WeekDay = (uint8_t)RTC_Bcd2ToByte(sTimeStampDate->WeekDay);
  }
 
  /* Clear the Timestamp Flag */
  __HAL_RTC_TIMESTAMP_CLEAR_FLAG(hrtc, RTC_FLAG_TSF);
 
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_RTCEx_SetTamper(RTC_HandleTypeDef *hrtc, RTC_TamperTypeDef *sTamper)
{
  uint32_t tmpreg = 0U;
 
  /* Check the parameters */
  assert_param(IS_RTC_TAMPER(sTamper->Tamper));
  assert_param(IS_RTC_TAMPER_PIN(sTamper->PinSelection));
  assert_param(IS_RTC_TAMPER_TRIGGER(sTamper->Trigger));
  assert_param(IS_RTC_TAMPER_FILTER(sTamper->Filter));
  assert_param(IS_RTC_TAMPER_FILTER_CONFIG_CORRECT(sTamper->Filter, sTamper->Trigger));
  assert_param(IS_RTC_TAMPER_SAMPLING_FREQ(sTamper->SamplingFrequency));
  assert_param(IS_RTC_TAMPER_PRECHARGE_DURATION(sTamper->PrechargeDuration));
  assert_param(IS_RTC_TAMPER_PULLUP_STATE(sTamper->TamperPullUp));
  assert_param(IS_RTC_TAMPER_TIMESTAMPONTAMPER_DETECTION(sTamper->TimeStampOnTamperDetection));
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Copy control register into temporary variable */
  tmpreg = hrtc->Instance->TAFCR;
 
  /* Enable selected tamper */
  tmpreg |= (sTamper->Tamper);
 
  /* Configure the tamper trigger bit (this bit is just on the right of the
       tamper enable bit, hence the one-time right shift before updating it) */
  if (sTamper->Trigger == RTC_TAMPERTRIGGER_FALLINGEDGE)
  {
    /* Set the tamper trigger bit (case of falling edge or high level) */
    tmpreg |= (uint32_t)(sTamper->Tamper << 1U);
  }
  else
  {
    /* Clear the tamper trigger bit (case of rising edge or low level) */
    tmpreg &= (uint32_t)~(sTamper->Tamper << 1U);
  }
 
  /* Clear remaining fields before setting them */
  tmpreg &= ~(RTC_TAMPERFILTER_MASK              | \
              RTC_TAMPERSAMPLINGFREQ_RTCCLK_MASK | \
              RTC_TAMPERPRECHARGEDURATION_MASK   | \
              RTC_TAMPER_PULLUP_MASK             | \
              RTC_TAFCR_TAMP1INSEL               | \
              RTC_TIMESTAMPONTAMPERDETECTION_MASK);
 
  /* Set remaining parameters of desired configuration into temporary variable */
  tmpreg |= ((uint32_t)sTamper->Filter            | \
             (uint32_t)sTamper->SamplingFrequency | \
             (uint32_t)sTamper->PrechargeDuration | \
             (uint32_t)sTamper->TamperPullUp      | \
             (uint32_t)sTamper->PinSelection      | \
             (uint32_t)sTamper->TimeStampOnTamperDetection);
 
  /* Disable tamper global interrupt in case it is enabled */
  tmpreg &= (uint32_t)~RTC_TAFCR_TAMPIE;
 
  /* Copy desired configuration into configuration register */
  hrtc->Instance->TAFCR = tmpreg;
 
  hrtc->State = HAL_RTC_STATE_READY;
 
  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);
 
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_RTCEx_SetTamper_IT(RTC_HandleTypeDef *hrtc, RTC_TamperTypeDef *sTamper)
{
  uint32_t tmpreg = 0U;
 
  /* Check the parameters */
  assert_param(IS_RTC_TAMPER(sTamper->Tamper));
  assert_param(IS_RTC_TAMPER_PIN(sTamper->PinSelection));
  assert_param(IS_RTC_TAMPER_TRIGGER(sTamper->Trigger));
  assert_param(IS_RTC_TAMPER_FILTER(sTamper->Filter));
  assert_param(IS_RTC_TAMPER_FILTER_CONFIG_CORRECT(sTamper->Filter, sTamper->Trigger));
  assert_param(IS_RTC_TAMPER_SAMPLING_FREQ(sTamper->SamplingFrequency));
  assert_param(IS_RTC_TAMPER_PRECHARGE_DURATION(sTamper->PrechargeDuration));
  assert_param(IS_RTC_TAMPER_PULLUP_STATE(sTamper->TamperPullUp));
  assert_param(IS_RTC_TAMPER_TIMESTAMPONTAMPER_DETECTION(sTamper->TimeStampOnTamperDetection));
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Copy control register into temporary variable */
  tmpreg = hrtc->Instance->TAFCR;
 
  /* Enable selected tamper */
  tmpreg |= (sTamper->Tamper);
 
  /* Configure the tamper trigger bit (this bit is just on the right of the
       tamper enable bit, hence the one-time right shift before updating it) */
  if (sTamper->Trigger == RTC_TAMPERTRIGGER_FALLINGEDGE)
  {
    /* Set the tamper trigger bit (case of falling edge or high level) */
    tmpreg |= (uint32_t)(sTamper->Tamper << 1U);
  }
  else
  {
    /* Clear the tamper trigger bit (case of rising edge or low level) */
    tmpreg &= (uint32_t)~(sTamper->Tamper << 1U);
  }
 
  /* Clear remaining fields before setting them */
  tmpreg &= ~(RTC_TAMPERFILTER_MASK              | \
              RTC_TAMPERSAMPLINGFREQ_RTCCLK_MASK | \
              RTC_TAMPERPRECHARGEDURATION_MASK   | \
              RTC_TAMPER_PULLUP_MASK             | \
              RTC_TAFCR_TAMP1INSEL               | \
              RTC_TIMESTAMPONTAMPERDETECTION_MASK);
 
  /* Set remaining parameters of desired configuration into temporary variable */
  tmpreg |= ((uint32_t)sTamper->Filter            | \
             (uint32_t)sTamper->SamplingFrequency | \
             (uint32_t)sTamper->PrechargeDuration | \
             (uint32_t)sTamper->TamperPullUp      | \
             (uint32_t)sTamper->PinSelection      | \
             (uint32_t)sTamper->TimeStampOnTamperDetection);
 
  /* Enable global tamper interrupt */
  tmpreg |= (uint32_t)RTC_TAFCR_TAMPIE;
 
  /* Copy desired configuration into configuration register */
  hrtc->Instance->TAFCR = tmpreg;
 
  /* RTC Tamper Interrupt Configuration: EXTI configuration */
  __HAL_RTC_TAMPER_TIMESTAMP_EXTI_ENABLE_IT();
  __HAL_RTC_TAMPER_TIMESTAMP_EXTI_ENABLE_RISING_EDGE();
 
  hrtc->State = HAL_RTC_STATE_READY;
 
  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);
 
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_RTCEx_DeactivateTamper(RTC_HandleTypeDef *hrtc, uint32_t Tamper)
{
  assert_param(IS_RTC_TAMPER(Tamper));
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Disable the selected Tamper pin */
  hrtc->Instance->TAFCR &= (uint32_t)~Tamper;
 
  hrtc->State = HAL_RTC_STATE_READY;
 
  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);
 
  return HAL_OK;
}
 
void HAL_RTCEx_TamperTimeStampIRQHandler(RTC_HandleTypeDef *hrtc)
{
  /* Clear the EXTI's Flag for RTC Timestamp and Tamper */
  __HAL_RTC_TAMPER_TIMESTAMP_EXTI_CLEAR_FLAG();
 
  /* Get the Timestamp interrupt source enable status */
  if (__HAL_RTC_TIMESTAMP_GET_IT_SOURCE(hrtc, RTC_IT_TS) != 0U)
  {
    /* Get the pending status of the Timestamp Interrupt */
    if (__HAL_RTC_TIMESTAMP_GET_FLAG(hrtc, RTC_FLAG_TSF) != 0U)
    {
      /* Timestamp callback */
#if (USE_HAL_RTC_REGISTER_CALLBACKS == 1)
      hrtc->TimeStampEventCallback(hrtc);
#else
      HAL_RTCEx_TimeStampEventCallback(hrtc);
#endif /* USE_HAL_RTC_REGISTER_CALLBACKS */
 
      /* Clear the Timestamp interrupt pending bit after returning from callback
         as RTC_TSTR and RTC_TSDR registers are cleared when TSF bit is reset */
      __HAL_RTC_TIMESTAMP_CLEAR_FLAG(hrtc, RTC_FLAG_TSF);
    }
  }
 
  /* Get the Tamper 1 interrupt source enable status */
  if (__HAL_RTC_TAMPER_GET_IT_SOURCE(hrtc, RTC_IT_TAMP) != 0U)
  {
    /* Get the pending status of the Tamper 1 Interrupt */
    if (__HAL_RTC_TAMPER_GET_FLAG(hrtc, RTC_FLAG_TAMP1F) != 0U)
    {
      /* Clear the Tamper interrupt pending bit */
      __HAL_RTC_TAMPER_CLEAR_FLAG(hrtc, RTC_FLAG_TAMP1F);
 
      /* Tamper callback */
#if (USE_HAL_RTC_REGISTER_CALLBACKS == 1)
      hrtc->Tamper1EventCallback(hrtc);
#else
      HAL_RTCEx_Tamper1EventCallback(hrtc);
#endif /* USE_HAL_RTC_REGISTER_CALLBACKS */
    }
  }
 
#if defined(RTC_TAMPER2_SUPPORT)
  /* Get the Tamper 2 interrupt source enable status */
  if (__HAL_RTC_TAMPER_GET_IT_SOURCE(hrtc, RTC_IT_TAMP) != 0U)
  {
    /* Get the pending status of the Tamper 2 Interrupt */
    if (__HAL_RTC_TAMPER_GET_FLAG(hrtc, RTC_FLAG_TAMP2F) != 0U)
    {
      /* Clear the Tamper interrupt pending bit */
      __HAL_RTC_TAMPER_CLEAR_FLAG(hrtc, RTC_FLAG_TAMP2F);
 
      /* Tamper callback */
#if (USE_HAL_RTC_REGISTER_CALLBACKS == 1)
      hrtc->Tamper2EventCallback(hrtc);
#else
      HAL_RTCEx_Tamper2EventCallback(hrtc);
#endif /* USE_HAL_RTC_REGISTER_CALLBACKS */
    }
  }
#endif /* RTC_TAMPER2_SUPPORT */
 
  /* Change RTC state */
  hrtc->State = HAL_RTC_STATE_READY;
}
 
__weak void HAL_RTCEx_TimeStampEventCallback(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_RTCEx_TimeStampEventCallback could be implemented in the user file
  */
}
 
__weak void HAL_RTCEx_Tamper1EventCallback(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_RTCEx_Tamper1EventCallback could be implemented in the user file
   */
}
 
#if defined(RTC_TAMPER2_SUPPORT)
__weak void HAL_RTCEx_Tamper2EventCallback(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_RTCEx_Tamper2EventCallback could be implemented in the user file
   */
}
#endif /* RTC_TAMPER2_SUPPORT */
 
HAL_StatusTypeDef HAL_RTCEx_PollForTimeStampEvent(RTC_HandleTypeDef *hrtc, uint32_t Timeout)
{
  uint32_t tickstart = 0U;
 
  /* Get tick */
  tickstart = HAL_GetTick();
 
  while (__HAL_RTC_TIMESTAMP_GET_FLAG(hrtc, RTC_FLAG_TSF) == 0U)
  {
    if (Timeout != HAL_MAX_DELAY)
    {
      if ((Timeout == 0U) || ((HAL_GetTick() - tickstart) > Timeout))
      {
        hrtc->State = HAL_RTC_STATE_TIMEOUT;
        return HAL_TIMEOUT;
      }
    }
 
    if (__HAL_RTC_TIMESTAMP_GET_FLAG(hrtc, RTC_FLAG_TSOVF) != 0U)
    {
      /* Clear the Timestamp Overrun Flag */
      __HAL_RTC_TIMESTAMP_CLEAR_FLAG(hrtc, RTC_FLAG_TSOVF);
 
      /* Change Timestamp state */
      hrtc->State = HAL_RTC_STATE_ERROR;
 
      return HAL_ERROR;
    }
  }
 
  /* Change RTC state */
  hrtc->State = HAL_RTC_STATE_READY;
 
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_RTCEx_PollForTamper1Event(RTC_HandleTypeDef *hrtc, uint32_t Timeout)
{
  uint32_t tickstart = 0U;
 
  /* Get tick */
  tickstart = HAL_GetTick();
 
  /* Get the status of the Interrupt */
  while (__HAL_RTC_TAMPER_GET_FLAG(hrtc, RTC_FLAG_TAMP1F) == 0U)
  {
    if (Timeout != HAL_MAX_DELAY)
    {
      if ((Timeout == 0U) || ((HAL_GetTick() - tickstart) > Timeout))
      {
        hrtc->State = HAL_RTC_STATE_TIMEOUT;
        return HAL_TIMEOUT;
      }
    }
  }
 
  /* Clear the Tamper Flag */
  __HAL_RTC_TAMPER_CLEAR_FLAG(hrtc, RTC_FLAG_TAMP1F);
 
  /* Change RTC state */
  hrtc->State = HAL_RTC_STATE_READY;
 
  return HAL_OK;
}
 
#if defined(RTC_TAMPER2_SUPPORT)
HAL_StatusTypeDef HAL_RTCEx_PollForTamper2Event(RTC_HandleTypeDef *hrtc, uint32_t Timeout)
{
  uint32_t tickstart = 0U;
 
  /* Get tick */
  tickstart = HAL_GetTick();
 
  /* Get the status of the Interrupt */
  while (__HAL_RTC_TAMPER_GET_FLAG(hrtc, RTC_FLAG_TAMP2F) == 0U)
  {
    if (Timeout != HAL_MAX_DELAY)
    {
      if ((Timeout == 0U) || ((HAL_GetTick() - tickstart) > Timeout))
      {
        hrtc->State = HAL_RTC_STATE_TIMEOUT;
        return HAL_TIMEOUT;
      }
    }
  }
 
  /* Clear the Tamper Flag */
  __HAL_RTC_TAMPER_CLEAR_FLAG(hrtc, RTC_FLAG_TAMP2F);
 
  /* Change RTC state */
  hrtc->State = HAL_RTC_STATE_READY;
 
  return HAL_OK;
}
#endif /* RTC_TAMPER2_SUPPORT */
 
HAL_StatusTypeDef HAL_RTCEx_SetWakeUpTimer(RTC_HandleTypeDef *hrtc, uint32_t WakeUpCounter, uint32_t WakeUpClock)
{
  uint32_t tickstart = 0U;
 
  /* Check the parameters */
  assert_param(IS_RTC_WAKEUP_CLOCK(WakeUpClock));
  assert_param(IS_RTC_WAKEUP_COUNTER(WakeUpCounter));
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  /* Check RTC WUTWF flag is reset only when wakeup timer enabled*/
  if ((hrtc->Instance->CR & RTC_CR_WUTE) != 0U)
  {
    tickstart = HAL_GetTick();
 
    /* Wait till RTC WUTWF flag is reset and if timeout is reached exit */
    while (__HAL_RTC_WAKEUPTIMER_GET_FLAG(hrtc, RTC_FLAG_WUTWF) != 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;
      }
    }
  }
 
  /* Disable the Wakeup timer */
  __HAL_RTC_WAKEUPTIMER_DISABLE(hrtc);
 
  /* Clear the Wakeup flag */
  __HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(hrtc, RTC_FLAG_WUTF);
 
  /* Get tick */
  tickstart = HAL_GetTick();
 
  /* Wait till RTC WUTWF flag is set and if timeout is reached exit */
  while (__HAL_RTC_WAKEUPTIMER_GET_FLAG(hrtc, RTC_FLAG_WUTWF) == 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;
    }
  }
 
  /* Clear the Wakeup Timer clock source bits in CR register */
  hrtc->Instance->CR &= (uint32_t)~RTC_CR_WUCKSEL;
 
  /* Configure the clock source */
  hrtc->Instance->CR |= (uint32_t)WakeUpClock;
 
  /* Configure the Wakeup Timer counter */
  hrtc->Instance->WUTR = (uint32_t)WakeUpCounter;
 
  /* Enable the Wakeup Timer */
  __HAL_RTC_WAKEUPTIMER_ENABLE(hrtc);
 
  /* 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_RTCEx_SetWakeUpTimer_IT(RTC_HandleTypeDef *hrtc, uint32_t WakeUpCounter, uint32_t WakeUpClock)
{
  __IO uint32_t count  = RTC_TIMEOUT_VALUE * (SystemCoreClock / 32U / 1000U);
 
  /* Check the parameters */
  assert_param(IS_RTC_WAKEUP_CLOCK(WakeUpClock));
  assert_param(IS_RTC_WAKEUP_COUNTER(WakeUpCounter));
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  /* Check RTC WUTWF flag is reset only when wakeup timer enabled */
  if ((hrtc->Instance->CR & RTC_CR_WUTE) != 0U)
  {
    /* Wait till RTC WUTWF flag is reset and if timeout is reached exit */
    do
    {
      count = count - 1U;
      if (count == 0U)
      {
        /* 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;
      }
    } while (__HAL_RTC_WAKEUPTIMER_GET_FLAG(hrtc, RTC_FLAG_WUTWF) != 0U);
  }
 
  /* Disable the Wakeup timer */
  __HAL_RTC_WAKEUPTIMER_DISABLE(hrtc);
 
  /* Clear the Wakeup flag */
  __HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(hrtc, RTC_FLAG_WUTF);
 
  /* Reload the counter */
  count = RTC_TIMEOUT_VALUE * (SystemCoreClock / 32U / 1000U);
 
  /* Wait till RTC WUTWF flag is set and if timeout is reached exit */
  do
  {
    count = count - 1U;
    if (count == 0U)
    {
      /* 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;
    }
  } while (__HAL_RTC_WAKEUPTIMER_GET_FLAG(hrtc, RTC_FLAG_WUTWF) == 0U);
 
  /* Clear the Wakeup Timer clock source bits in CR register */
  hrtc->Instance->CR &= (uint32_t)~RTC_CR_WUCKSEL;
 
  /* Configure the clock source */
  hrtc->Instance->CR |= (uint32_t)WakeUpClock;
 
  /* Configure the Wakeup Timer counter */
  hrtc->Instance->WUTR = (uint32_t)WakeUpCounter;
 
  /* RTC wakeup timer Interrupt Configuration: EXTI configuration */
  __HAL_RTC_WAKEUPTIMER_EXTI_ENABLE_IT();
  __HAL_RTC_WAKEUPTIMER_EXTI_ENABLE_RISING_EDGE();
 
  /* Configure the interrupt in the RTC_CR register */
  __HAL_RTC_WAKEUPTIMER_ENABLE_IT(hrtc, RTC_IT_WUT);
 
  /* Enable the Wakeup Timer */
  __HAL_RTC_WAKEUPTIMER_ENABLE(hrtc);
 
  /* 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_RTCEx_DeactivateWakeUpTimer(RTC_HandleTypeDef *hrtc)
{
  uint32_t tickstart = 0U;
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  /* Disable the Wakeup Timer */
  __HAL_RTC_WAKEUPTIMER_DISABLE(hrtc);
 
  /* In case of interrupt mode is used, the interrupt source must disabled */
  __HAL_RTC_WAKEUPTIMER_DISABLE_IT(hrtc, RTC_IT_WUT);
 
  /* Get tick */
  tickstart = HAL_GetTick();
 
  /* Wait till RTC WUTWF flag is set and if timeout is reached exit */
  while (__HAL_RTC_WAKEUPTIMER_GET_FLAG(hrtc, RTC_FLAG_WUTWF) == 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;
    }
  }
 
  /* 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;
}
 
uint32_t HAL_RTCEx_GetWakeUpTimer(RTC_HandleTypeDef *hrtc)
{
  /* Get the counter value */
  return ((uint32_t)(hrtc->Instance->WUTR & RTC_WUTR_WUT));
}
 
void HAL_RTCEx_WakeUpTimerIRQHandler(RTC_HandleTypeDef *hrtc)
{
  /* Clear the EXTI's line Flag for RTC WakeUpTimer */
  __HAL_RTC_WAKEUPTIMER_EXTI_CLEAR_FLAG();
 
  /* Get the pending status of the Wakeup timer Interrupt */
  if (__HAL_RTC_WAKEUPTIMER_GET_FLAG(hrtc, RTC_FLAG_WUTF) != 0U)
  {
    /* Clear the Wakeup timer interrupt pending bit */
    __HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(hrtc, RTC_FLAG_WUTF);
 
    /* Wakeup timer callback */
#if (USE_HAL_RTC_REGISTER_CALLBACKS == 1)
    hrtc->WakeUpTimerEventCallback(hrtc);
#else
    HAL_RTCEx_WakeUpTimerEventCallback(hrtc);
#endif /* USE_HAL_RTC_REGISTER_CALLBACKS */
  }
 
  /* Change RTC state */
  hrtc->State = HAL_RTC_STATE_READY;
}
 
__weak void HAL_RTCEx_WakeUpTimerEventCallback(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_RTCEx_WakeUpTimerEventCallback could be implemented in the user file
   */
}
 
HAL_StatusTypeDef HAL_RTCEx_PollForWakeUpTimerEvent(RTC_HandleTypeDef *hrtc, uint32_t Timeout)
{
  uint32_t tickstart = 0U;
 
  /* Get tick */
  tickstart = HAL_GetTick();
 
  while (__HAL_RTC_WAKEUPTIMER_GET_FLAG(hrtc, RTC_FLAG_WUTF) == 0U)
  {
    if (Timeout != HAL_MAX_DELAY)
    {
      if ((Timeout == 0U) || ((HAL_GetTick() - tickstart) > Timeout))
      {
        hrtc->State = HAL_RTC_STATE_TIMEOUT;
        return HAL_TIMEOUT;
      }
    }
  }
 
  /* Clear the Wakeup timer Flag */
  __HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(hrtc, RTC_FLAG_WUTF);
 
  /* Change RTC state */
  hrtc->State = HAL_RTC_STATE_READY;
 
  return HAL_OK;
}
 
void HAL_RTCEx_BKUPWrite(RTC_HandleTypeDef *hrtc, uint32_t BackupRegister, uint32_t Data)
{
  uint32_t tmp = 0U;
 
  /* Check the parameters */
  assert_param(IS_RTC_BKP(BackupRegister));
 
  tmp = (uint32_t) & (hrtc->Instance->BKP0R);
  tmp += (BackupRegister * 4U);
 
  /* Write the specified register */
  *(__IO uint32_t *)tmp = (uint32_t)Data;
}
 
uint32_t HAL_RTCEx_BKUPRead(RTC_HandleTypeDef *hrtc, uint32_t BackupRegister)
{
  uint32_t tmp = 0U;
 
  /* Check the parameters */
  assert_param(IS_RTC_BKP(BackupRegister));
 
  tmp = (uint32_t) & (hrtc->Instance->BKP0R);
  tmp += (BackupRegister * 4U);
 
  /* Read the specified register */
  return (*(__IO uint32_t *)tmp);
}
 
HAL_StatusTypeDef HAL_RTCEx_SetCoarseCalib(RTC_HandleTypeDef *hrtc, uint32_t CalibSign, uint32_t Value)
{
  HAL_StatusTypeDef status;
 
  /* Check the parameters */
  assert_param(IS_RTC_CALIB_SIGN(CalibSign));
  assert_param(IS_RTC_CALIB_VALUE(Value));
 
  /* 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)
  {
    /* Enable the Coarse Calibration */
    __HAL_RTC_COARSE_CALIB_ENABLE(hrtc);
 
    /* Set the coarse calibration value */
    hrtc->Instance->CALIBR = (uint32_t)(CalibSign | Value);
 
    /* Exit Initialization mode */
    status = RTC_ExitInitMode(hrtc);
  }
 
  if (status == HAL_OK)
  {
    hrtc->State = HAL_RTC_STATE_READY;
  }
 
  /* Enable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 
  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);
 
  return status;
}
 
HAL_StatusTypeDef HAL_RTCEx_DeactivateCoarseCalib(RTC_HandleTypeDef *hrtc)
{
  HAL_StatusTypeDef status;
 
  /* 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)
  {
    /* Disable the Coarse Calibration */
    __HAL_RTC_COARSE_CALIB_DISABLE(hrtc);
 
    /* Exit Initialization mode */
    status = RTC_ExitInitMode(hrtc);
  }
 
  if (status == HAL_OK)
  {
    hrtc->State = HAL_RTC_STATE_READY;
  }
 
  /* Enable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 
  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);
 
  return status;
}
 
HAL_StatusTypeDef HAL_RTCEx_SetSmoothCalib(RTC_HandleTypeDef *hrtc, uint32_t SmoothCalibPeriod, uint32_t SmoothCalibPlusPulses, uint32_t SmoothCalibMinusPulsesValue)
{
  uint32_t tickstart = 0U;
 
  /* Check the parameters */
  assert_param(IS_RTC_SMOOTH_CALIB_PERIOD(SmoothCalibPeriod));
  assert_param(IS_RTC_SMOOTH_CALIB_PLUS(SmoothCalibPlusPulses));
  assert_param(IS_RTC_SMOOTH_CALIB_MINUS(SmoothCalibMinusPulsesValue));
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  /* check if a calibration is pending*/
  if ((hrtc->Instance->ISR & RTC_ISR_RECALPF) != 0U)
  {
    /* Get tick */
    tickstart = HAL_GetTick();
 
    /* check if a calibration is pending*/
    while ((hrtc->Instance->ISR & RTC_ISR_RECALPF) != 0U)
    {
      if ((HAL_GetTick() - tickstart) > RTC_TIMEOUT_VALUE)
      {
        /* Enable the write protection for RTC registers */
        __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 
        /* Change RTC state */
        hrtc->State = HAL_RTC_STATE_TIMEOUT;
 
        /* Process Unlocked */
        __HAL_UNLOCK(hrtc);
 
        return HAL_TIMEOUT;
      }
    }
  }
 
  /* Configure the Smooth calibration settings */
  hrtc->Instance->CALR = (uint32_t)((uint32_t)SmoothCalibPeriod     | \
                                    (uint32_t)SmoothCalibPlusPulses | \
                                    (uint32_t)SmoothCalibMinusPulsesValue);
 
  /* 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_RTCEx_SetSynchroShift(RTC_HandleTypeDef *hrtc, uint32_t ShiftAdd1S, uint32_t ShiftSubFS)
{
  uint32_t tickstart = 0U;
 
  /* Check the parameters */
  assert_param(IS_RTC_SHIFT_ADD1S(ShiftAdd1S));
  assert_param(IS_RTC_SHIFT_SUBFS(ShiftSubFS));
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  /* Get tick */
  tickstart = HAL_GetTick();
 
  /* Wait until the shift is completed */
  while ((hrtc->Instance->ISR & RTC_ISR_SHPF) != 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;
    }
  }
 
  /* Check if the reference clock detection is disabled */
  if ((hrtc->Instance->CR & RTC_CR_REFCKON) == 0U)
  {
    /* Configure the Shift settings */
    hrtc->Instance->SHIFTR = (uint32_t)(uint32_t)(ShiftSubFS) | (uint32_t)(ShiftAdd1S);
 
    /* If  RTC_CR_BYPSHAD bit = 0, wait for synchro else this check is not needed */
    if ((hrtc->Instance->CR & RTC_CR_BYPSHAD) == 0U)
    {
      if (HAL_RTC_WaitForSynchro(hrtc) != HAL_OK)
      {
        /* Enable the write protection for RTC registers */
        __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 
        hrtc->State = HAL_RTC_STATE_ERROR;
 
        /* Process Unlocked */
        __HAL_UNLOCK(hrtc);
 
        return HAL_ERROR;
      }
    }
  }
  else
  {
    /* Enable the write protection for RTC registers */
    __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 
    /* Change RTC state */
    hrtc->State = HAL_RTC_STATE_ERROR;
 
    /* Process Unlocked */
    __HAL_UNLOCK(hrtc);
 
    return HAL_ERROR;
  }
 
  /* 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_RTCEx_SetCalibrationOutPut(RTC_HandleTypeDef *hrtc, uint32_t CalibOutput)
{
  /* Check the parameters */
  assert_param(IS_RTC_CALIB_OUTPUT(CalibOutput));
 
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  /* Clear flags before config */
  hrtc->Instance->CR &= (uint32_t)~RTC_CR_COSEL;
 
  /* Configure the RTC_CR register */
  hrtc->Instance->CR |= (uint32_t)CalibOutput;
 
  __HAL_RTC_CALIBRATION_OUTPUT_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_RTCEx_DeactivateCalibrationOutPut(RTC_HandleTypeDef *hrtc)
{
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  __HAL_RTC_CALIBRATION_OUTPUT_DISABLE(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_RTCEx_SetRefClock(RTC_HandleTypeDef *hrtc)
{
  HAL_StatusTypeDef status;
 
  /* 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)
  {
    /* Enable the reference clock detection */
    __HAL_RTC_CLOCKREF_DETECTION_ENABLE(hrtc);
 
    /* Exit Initialization mode */
    status = RTC_ExitInitMode(hrtc);
  }
 
  if (status == HAL_OK)
  {
    hrtc->State = HAL_RTC_STATE_READY;
  }
 
  /* Enable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 
  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);
 
  return status;
}
 
HAL_StatusTypeDef HAL_RTCEx_DeactivateRefClock(RTC_HandleTypeDef *hrtc)
{
  HAL_StatusTypeDef status;
 
  /* 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)
  {
    /* Disable the reference clock detection */
    __HAL_RTC_CLOCKREF_DETECTION_DISABLE(hrtc);
 
    /* Exit Initialization mode */
    status = RTC_ExitInitMode(hrtc);
  }
 
  if (status == HAL_OK)
  {
    hrtc->State = HAL_RTC_STATE_READY;
  }
 
  /* Enable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
 
  /* Process Unlocked */
  __HAL_UNLOCK(hrtc);
 
  return status;
}
 
HAL_StatusTypeDef HAL_RTCEx_EnableBypassShadow(RTC_HandleTypeDef *hrtc)
{
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  /* Set the BYPSHAD bit */
  hrtc->Instance->CR |= (uint8_t)RTC_CR_BYPSHAD;
 
  /* 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_RTCEx_DisableBypassShadow(RTC_HandleTypeDef *hrtc)
{
  /* Process Locked */
  __HAL_LOCK(hrtc);
 
  hrtc->State = HAL_RTC_STATE_BUSY;
 
  /* Disable the write protection for RTC registers */
  __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
 
  /* Reset the BYPSHAD bit */
  hrtc->Instance->CR &= (uint8_t)~RTC_CR_BYPSHAD;
 
  /* 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;
}
 
__weak void HAL_RTCEx_AlarmBEventCallback(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_RTCEx_AlarmBEventCallback could be implemented in the user file
   */
}
 
HAL_StatusTypeDef HAL_RTCEx_PollForAlarmBEvent(RTC_HandleTypeDef *hrtc, uint32_t Timeout)
{
  uint32_t tickstart = 0U;
 
  /* Get tick */
  tickstart = HAL_GetTick();
 
  /* Wait till RTC ALRBF flag is set and if timeout is reached exit */
  while (__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRBF) == 0U)
  {
    if (Timeout != HAL_MAX_DELAY)
    {
      if ((Timeout == 0U) || ((HAL_GetTick() - tickstart) > Timeout))
      {
        hrtc->State = HAL_RTC_STATE_TIMEOUT;
        return HAL_TIMEOUT;
      }
    }
  }
 
  /* Clear the Alarm flag */
  __HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRBF);
 
  /* Change RTC state */
  hrtc->State = HAL_RTC_STATE_READY;
 
  return HAL_OK;
}
 
#endif /* HAL_RTC_MODULE_ENABLED */