/**
  * @brief  Configures the RTC.
  * @param  None
  * @retval None
  */
static void RTC_Config(void)
{
  /* Enable Power Clock*/
  __PWR_CLK_ENABLE();
  
  /* Allow Access to RTC Backup domaine */
  HAL_PWR_EnableBkUpAccess();
  
  RtcHandle.Instance= RTC;
  
  /* Check if the system was resumed from StandBy mode */
  if (__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
  {
    /* Clear StandBy flag */
    __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);

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

    /* Wait for RTC APB registers synchronisation (needed after start-up from Reset)*/
    if (HAL_RTC_WaitForSynchro(&RtcHandle) != HAL_OK)
    {
      while(1);
    }

    /* Enable the write protection for RTC registers */
    __HAL_RTC_WRITEPROTECTION_ENABLE(&RtcHandle);
    /* No need to configure the RTC as the RTC config(clock source, enable,
    prescaler,...) are kept after wake-up from STANDBY */
  }
  else
  {
    /* Reset Backup Domaine */
    __HAL_RCC_BACKUPRESET_FORCE();
    __HAL_RCC_BACKUPRESET_RELEASE();

    /* Set the RTC time base to 1s */    
    /* Configure RTC prescaler and RTC data registers as follows:
    - Hour Format = Format 24
    - Asynch Prediv = Value according to source clock
    - Synch Prediv = Value according to source clock
    - OutPut = Output Disable
    - OutPutPolarity = High Polarity
    - OutPutType = Open Drain */
    RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
    RtcHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
    RtcHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
    RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
    RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
    RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
    if(HAL_RTC_Init(&RtcHandle) != HAL_OK)
    {
      /* Initialization Error */
      while(1);
    }
  }
}
uint32_t TM_RTC_Init(TM_RTC_ClockSource_t source) {
	uint32_t status;
	TM_RTC_t datatime;
	
	/* Set instance */
	hRTC.Instance = RTC;
	hRTC.Init.AsynchPrediv = RTC_ASYNC_PREDIV;
	hRTC.Init.SynchPrediv = RTC_SYNC_PREDIV;
	hRTC.Init.HourFormat = RTC_HOURFORMAT_24;
	hRTC.Init.OutPut = RTC_OUTPUT_DISABLE;
	hRTC.Init.OutPutType = RTC_OUTPUT_TYPE_PUSHPULL;
	hRTC.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
	
	/* Enable PWR peripheral clock */
	__HAL_RCC_PWR_CLK_ENABLE();

	/* Allow access to BKP Domain */
	HAL_PWR_EnableBkUpAccess();
	
	/* Get RTC status */
	status = HAL_RTCEx_BKUPRead(&hRTC, RTC_STATUS_REG);
	
	/* Check if RTC already initialized */
	if (status == RTC_STATUS_TIME_OK) {
		/* Start internal clock if we choose internal clock */
		if (source == TM_RTC_ClockSource_Internal) {
			TM_RTC_Config(TM_RTC_ClockSource_Internal);
		}
		
		/* Wait for RTC APB registers synchronisation (needed after start-up from Reset) */
		HAL_RTC_WaitForSynchro(&hRTC);
		
		/* Get date and time */
		TM_RTC_GetDateTime(&datatime, TM_RTC_Format_BIN);
		
		/* Clear reset flags */
		__HAL_RCC_CLEAR_RESET_FLAGS();
		
		/* Return OK */
		return 1;
	} else {
		/* Start RTC clock */
		TM_RTC_Config(source);
		
		/* Set date */
		RTC_DateStruct.Year = 0;
		RTC_DateStruct.Month = 1;
		RTC_DateStruct.Date = 1;
		RTC_DateStruct.WeekDay = RTC_WEEKDAY_TUESDAY;

		/* Set date */
		HAL_RTC_SetDate(&hRTC, &RTC_DateStruct, RTC_FORMAT_BIN);

		/* Set time */
		RTC_TimeStruct.Hours = 0x00;
		RTC_TimeStruct.Minutes = 0x00;
		RTC_TimeStruct.Seconds = 0x00;
		RTC_TimeStruct.TimeFormat = RTC_HOURFORMAT_24;
		RTC_TimeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
		RTC_TimeStruct.StoreOperation = RTC_STOREOPERATION_RESET;

		/* Set time */
		HAL_RTC_SetTime(&hRTC, &RTC_TimeStruct, RTC_FORMAT_BCD);
		
		/* Init RTC */
		HAL_RTC_Init(&hRTC);

		/* Save data to backup regiser */
		HAL_RTCEx_BKUPWrite(&hRTC, RTC_STATUS_REG, RTC_STATUS_TIME_OK); 
		
		/* RTC was initialized now */
		return 0;
	}
}
Example #3
0
/**
  * @brief  Configures the RTC.
  * @param  None
  * @retval None
  */
static void RTC_Config(void)
{ 
  RTCHandle.Instance = RTC;
  /* Set the RTC time base to 1s */  
  /* Configure RTC prescaler and RTC data registers as follow:
  - Hour Format = Format 24
  - Asynch Prediv = Value according to source clock
  - Synch Prediv = Value according to source clock
  - OutPut = Output Disable
  - OutPutPolarity = High Polarity
  - OutPutType = Open Drain */ 
  RTCHandle.Init.HourFormat = RTC_HOURFORMAT_24;
  RTCHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
  RTCHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
  RTCHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
  RTCHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
  RTCHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;    
  if(HAL_RTC_Init(&RTCHandle) != HAL_OK)
  {
    /* Initialization Error */
    Error_Handler(); 
  }
  
  /* Check and Clear the Wakeup flag */
  if(__HAL_PWR_GET_FLAG(PWR_FLAG_WU) != RESET)
  {
    __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
  }  
  
  /* Check if the system was resumed from StandBy mode */
  if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
  {
    /* Clear StandBy flag */
    __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
    
    /* Disable the write protection for RTC registers */
    __HAL_RTC_WRITEPROTECTION_DISABLE(&RTCHandle);
    
    /* Wait for RTC APB registers synchronisation (needed after start-up from Reset)*/
    if(HAL_RTC_WaitForSynchro(&RTCHandle) != HAL_OK)
    {      
      /* Initialization Error */
      Error_Handler();      
    }

    /* Enable the write protection for RTC registers */
    __HAL_RTC_WRITEPROTECTION_ENABLE(&RTCHandle);
    /* No need to configure the RTC as the RTC config(clock source, enable,
    prescaler,...) are kept after wake-up from STANDBY */
  }
  else
  {
    /* Set the time to 01h 00mn 00s AM */
    RTC_TimeStructure.TimeFormat = RTC_HOURFORMAT12_AM;
    RTC_TimeStructure.Hours = 0x01;
    RTC_TimeStructure.Minutes = 0x00;
    RTC_TimeStructure.Seconds = 0x00;    
    if(HAL_RTC_SetTime(&RTCHandle, &RTC_TimeStructure, RTC_FORMAT_BCD) == HAL_ERROR)
    {
      /* Initialization Error */
      Error_Handler(); 
    }
  }
}
/**
  * @brief  Configures the Synchronization Shift Control Settings.
  * @note   When REFCKON is set, firmware must not write to Shift control register. 
  * @param  hrtc: RTC handle    
  * @param  ShiftAdd1S: Select to add or not 1 second to the time calendar.
  *          This parameter can be one of the following values :
  *             @arg RTC_SHIFTADD1S_SET: Add one second to the clock calendar. 
  *             @arg RTC_SHIFTADD1S_RESET: No effect.
  * @param  ShiftSubFS: Select the number of Second Fractions to substitute.
  *          This parameter can be one any value from 0 to 0x7FFF.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_RTCEx_SetSynchroShift(RTC_HandleTypeDef* hrtc, uint32_t ShiftAdd1S, uint32_t ShiftSubFS)
{
  uint32_t tickstart = 0;

  /* 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);

    tickstart = HAL_GetTick();

    /* Wait until the shift is completed*/
    while((hrtc->Instance->ISR & RTC_ISR_SHPF) != RESET)
    {
      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) == RESET)
    {
      /* 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) == RESET)
      {
        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;
}
Example #5
0
void rtc_synchronize(void)
{
    HAL_RTC_WaitForSynchro(&RtcHandle);
}