stm32f4xx_rtc.c

STM3240G-Eval_uCOS-III

    }
  }
  /* Enable the write protection for RTC registers */
  RTC->WPR = 0xFF;   
  
  return status;
}

/**
  * @brief  Fills each RTC_DateStruct member with its default value
  *         (Monday, January 01 xx00).
  * @param  RTC_DateStruct: pointer to a RTC_DateTypeDef structure which will be 
  *         initialized.
  * @retval None
  */
void RTC_DateStructInit(RTC_DateTypeDef* RTC_DateStruct)
{
  /* Monday, January 01 xx00 */
  RTC_DateStruct->RTC_WeekDay = RTC_Weekday_Monday;
  RTC_DateStruct->RTC_Date = 1;
  RTC_DateStruct->RTC_Month = RTC_Month_January;
  RTC_DateStruct->RTC_Year = 0;
}

/**
  * @brief  Get the RTC current date. 
  * @param  RTC_Format: specifies the format of the returned parameters.
  *          This parameter can be one of the following values:
  *            @arg RTC_Format_BIN: Binary data format 
  *            @arg RTC_Format_BCD: BCD data format
  * @param RTC_DateStruct: pointer to a RTC_DateTypeDef structure that will 
  *                        contain the returned current date configuration.     
  * @retval None
  */
void RTC_GetDate(uint32_t RTC_Format, RTC_DateTypeDef* RTC_DateStruct)
{
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_RTC_FORMAT(RTC_Format));
  
  /* Get the RTC_TR register */
  tmpreg = (uint32_t)(RTC->DR & RTC_DR_RESERVED_MASK); 

  /* Fill the structure fields with the read parameters */
  RTC_DateStruct->RTC_Year = (uint8_t)((tmpreg & (RTC_DR_YT | RTC_DR_YU)) >> 16);
  RTC_DateStruct->RTC_Month = (uint8_t)((tmpreg & (RTC_DR_MT | RTC_DR_MU)) >> 8);
  RTC_DateStruct->RTC_Date = (uint8_t)(tmpreg & (RTC_DR_DT | RTC_DR_DU));
  RTC_DateStruct->RTC_WeekDay = (uint8_t)((tmpreg & (RTC_DR_WDU)) >> 13);

  /* Check the input parameters format */
  if (RTC_Format == RTC_Format_BIN)
  {
    /* Convert the structure parameters to Binary format */
    RTC_DateStruct->RTC_Year = (uint8_t)RTC_Bcd2ToByte(RTC_DateStruct->RTC_Year);
    RTC_DateStruct->RTC_Month = (uint8_t)RTC_Bcd2ToByte(RTC_DateStruct->RTC_Month);
    RTC_DateStruct->RTC_Date = (uint8_t)RTC_Bcd2ToByte(RTC_DateStruct->RTC_Date);
  }
}

/**
  * @}
  */

/** @defgroup RTC_Group3 Alarms configuration functions
 *  @brief   Alarms (Alarm A and Alarm B) configuration functions 
 *
@verbatim   
 ===============================================================================
              Alarms (Alarm A and Alarm B) configuration functions
 ===============================================================================  

  This section provide functions allowing to program and read the RTC Alarms.

@endverbatim
  * @{
  */

/**
  * @brief  Set the specified RTC Alarm.
  * @note   The Alarm register can only be written when the corresponding Alarm
  *         is disabled (Use the RTC_AlarmCmd(DISABLE)).    
  * @param  RTC_Format: specifies the format of the returned parameters.
  *          This parameter can be one of the following values:
  *            @arg RTC_Format_BIN: Binary data format 
  *            @arg RTC_Format_BCD: BCD data format
  * @param  RTC_Alarm: specifies the alarm to be configured.
  *          This parameter can be one of the following values:
  *            @arg RTC_Alarm_A: to select Alarm A
  *            @arg RTC_Alarm_B: to select Alarm B  
  * @param  RTC_AlarmStruct: pointer to a RTC_AlarmTypeDef structure that 
  *                          contains the alarm configuration parameters.     
  * @retval None
  */
void RTC_SetAlarm(uint32_t RTC_Format, uint32_t RTC_Alarm, RTC_AlarmTypeDef* RTC_AlarmStruct)
{
  uint32_t tmpreg = 0;
  
  /* Check the parameters */
  assert_param(IS_RTC_FORMAT(RTC_Format));
  assert_param(IS_RTC_ALARM(RTC_Alarm));
  assert_param(IS_ALARM_MASK(RTC_AlarmStruct->RTC_AlarmMask));
  assert_param(IS_RTC_ALARM_DATE_WEEKDAY_SEL(RTC_AlarmStruct->RTC_AlarmDateWeekDaySel));

  if (RTC_Format == RTC_Format_BIN)
  {
    if ((RTC->CR & RTC_CR_FMT) != (uint32_t)RESET)
    {
      assert_param(IS_RTC_HOUR12(RTC_AlarmStruct->RTC_AlarmTime.RTC_Hours));
      assert_param(IS_RTC_H12(RTC_AlarmStruct->RTC_AlarmTime.RTC_H12));
    } 
    else
    {
      RTC_AlarmStruct->RTC_AlarmTime.RTC_H12 = 0x00;
      assert_param(IS_RTC_HOUR24(RTC_AlarmStruct->RTC_AlarmTime.RTC_Hours));
    }
    assert_param(IS_RTC_MINUTES(RTC_AlarmStruct->RTC_AlarmTime.RTC_Minutes));
    assert_param(IS_RTC_SECONDS(RTC_AlarmStruct->RTC_AlarmTime.RTC_Seconds));
    
    if(RTC_AlarmStruct->RTC_AlarmDateWeekDaySel == RTC_AlarmDateWeekDaySel_Date)
    {
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_DATE(RTC_AlarmStruct->RTC_AlarmDateWeekDay));
    }
    else
    {
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_WEEKDAY(RTC_AlarmStruct->RTC_AlarmDateWeekDay));
    }
  }
  else
  {
    if ((RTC->CR & RTC_CR_FMT) != (uint32_t)RESET)
    {
      tmpreg = RTC_Bcd2ToByte(RTC_AlarmStruct->RTC_AlarmTime.RTC_Hours);
      assert_param(IS_RTC_HOUR12(tmpreg));
      assert_param(IS_RTC_H12(RTC_AlarmStruct->RTC_AlarmTime.RTC_H12));
    } 
    else
    {
      RTC_AlarmStruct->RTC_AlarmTime.RTC_H12 = 0x00;
      assert_param(IS_RTC_HOUR24(RTC_Bcd2ToByte(RTC_AlarmStruct->RTC_AlarmTime.RTC_Hours)));
    }
    
    assert_param(IS_RTC_MINUTES(RTC_Bcd2ToByte(RTC_AlarmStruct->RTC_AlarmTime.RTC_Minutes)));
    assert_param(IS_RTC_SECONDS(RTC_Bcd2ToByte(RTC_AlarmStruct->RTC_AlarmTime.RTC_Seconds)));
    
    if(RTC_AlarmStruct->RTC_AlarmDateWeekDaySel == RTC_AlarmDateWeekDaySel_Date)
    {
      tmpreg = RTC_Bcd2ToByte(RTC_AlarmStruct->RTC_AlarmDateWeekDay);
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_DATE(tmpreg));    
    }
    else
    {
      tmpreg = RTC_Bcd2ToByte(RTC_AlarmStruct->RTC_AlarmDateWeekDay);
      assert_param(IS_RTC_ALARM_DATE_WEEKDAY_WEEKDAY(tmpreg));      
    }    
  }

  /* Check the input parameters format */
  if (RTC_Format != RTC_Format_BIN)
  {
    tmpreg = (((uint32_t)(RTC_AlarmStruct->RTC_AlarmTime.RTC_Hours) << 16) | \
              ((uint32_t)(RTC_AlarmStruct->RTC_AlarmTime.RTC_Minutes) << 8) | \
              ((uint32_t)RTC_AlarmStruct->RTC_AlarmTime.RTC_Seconds) | \
              ((uint32_t)(RTC_AlarmStruct->RTC_AlarmTime.RTC_H12) << 16) | \
              ((uint32_t)(RTC_AlarmStruct->RTC_AlarmDateWeekDay) << 24) | \
              ((uint32_t)RTC_AlarmStruct->RTC_AlarmDateWeekDaySel) | \
              ((uint32_t)RTC_AlarmStruct->RTC_AlarmMask)); 
  }  
  else
  {
    tmpreg = (((uint32_t)RTC_ByteToBcd2(RTC_AlarmStruct->RTC_AlarmTime.RTC_Hours) << 16) | \
              ((uint32_t)RTC_ByteToBcd2(RTC_AlarmStruct->RTC_AlarmTime.RTC_Minutes) << 8) | \
              ((uint32_t)RTC_ByteToBcd2(RTC_AlarmStruct->RTC_AlarmTime.RTC_Seconds)) | \
              ((uint32_t)(RTC_AlarmStruct->RTC_AlarmTime.RTC_H12) << 16) | \
              ((uint32_t)RTC_ByteToBcd2(RTC_AlarmStruct->RTC_AlarmDateWeekDay) << 24) | \
              ((uint32_t)RTC_AlarmStruct->RTC_AlarmDateWeekDaySel) | \
              ((uint32_t)RTC_AlarmStruct->RTC_AlarmMask)); 
  } 

  /* Disable the write protection for RTC registers */
  RTC->WPR = 0xCA;
  RTC->WPR = 0x53;

  /* Configure the Alarm register */
  if (RTC_Alarm == RTC_Alarm_A)
  {
    RTC->ALRMAR = (uint32_t)tmpreg;
  }
  else
  {
    RTC->ALRMBR = (uint32_t)tmpreg;
  }

  /* Enable the write protection for RTC registers */
  RTC->WPR = 0xFF;   
}

/**
  * @brief  Fills each RTC_AlarmStruct member with its default value
  *         (Time = 00h:00mn:00sec / Date = 1st day of the month/Mask =
  *         all fields are masked).
  * @param  RTC_AlarmStruct: pointer to a @ref RTC_AlarmTypeDef structure which
  *         will be initialized.
  * @retval None
  */
void RTC_AlarmStructInit(RTC_AlarmTypeDef* RTC_AlarmStruct)
{
  /* Alarm Time Settings : Time = 00h:00mn:00sec */
  RTC_AlarmStruct->RTC_AlarmTime.RTC_H12 = RTC_H12_AM;
  RTC_AlarmStruct->RTC_AlarmTime.RTC_Hours = 0;
  RTC_AlarmStruct->RTC_AlarmTime.RTC_Minutes = 0;
  RTC_AlarmStruct->RTC_AlarmTime.RTC_Seconds = 0;

  /* Alarm Date Settings : Date = 1st day of the month */
  RTC_AlarmStruct->RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date;
  RTC_AlarmStruct->RTC_AlarmDateWeekDay = 1;

  /* Alarm Masks Settings : Mask =  all fields are not masked */
  RTC_AlarmStruct->RTC_AlarmMask = RTC_AlarmMask_None;
}

/**
  * @brief  Get the RTC Alarm value and masks.
  * @param  RTC_Format: specifies the format of the output parameters.
  *          This parameter can be one of the following values:
  *            @arg RTC_Format_BIN: Binary data format 
  *            @arg RTC_Format_BCD: BCD data format
  * @param  RTC_Alarm: specifies the alarm to be read.
  *          This parameter can be one of the following values:
  *            @arg RTC_Alarm_A: to select Alarm A
  *            @arg RTC_Alarm_B: to select Alarm B  
  * @param  RTC_AlarmStruct: pointer to a RTC_AlarmTypeDef structure that will 
  *                          contains the output alarm configuration values.     
  * @retval None
  */
void RTC_GetAlarm(uint32_t RTC_Format, uint32_t RTC_Alarm, RTC_AlarmTypeDef* RTC_AlarmStruct)
{
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_RTC_FORMAT(RTC_Format));
  assert_param(IS_RTC_ALARM(RTC_Alarm)); 

  /* Get the RTC_ALRMxR register */
  if (RTC_Alarm == RTC_Alarm_A)
  {
    tmpreg = (uint32_t)(RTC->ALRMAR);
  }
  else
  {
    tmpreg = (uint32_t)(RTC->ALRMBR);
  }

  /* Fill the structure with the read parameters */
  RTC_AlarmStruct->RTC_AlarmTime.RTC_Hours = (uint32_t)((tmpreg & (RTC_ALRMAR_HT | \
                                                     RTC_ALRMAR_HU)) >> 16);
  RTC_AlarmStruct->RTC_AlarmTime.RTC_Minutes = (uint32_t)((tmpreg & (RTC_ALRMAR_MNT | \
                                                     RTC_ALRMAR_MNU)) >> 8);
  RTC_AlarmStruct->RTC_AlarmTime.RTC_Seconds = (uint32_t)(tmpreg & (RTC_ALRMAR_ST | \
                                                     RTC_ALRMAR_SU));
  RTC_AlarmStruct->RTC_AlarmTime.RTC_H12 = (uint32_t)((tmpreg & RTC_ALRMAR_PM) >> 16);
  RTC_AlarmStruct->RTC_AlarmDateWeekDay = (uint32_t)((tmpreg & (RTC_ALRMAR_DT | RTC_ALRMAR_DU)) >> 24);
  RTC_AlarmStruct->RTC_AlarmDateWeekDaySel = (uint32_t)(tmpreg & RTC_ALRMAR_WDSEL);
  RTC_AlarmStruct->RTC_AlarmMask = (uint32_t)(tmpreg & RTC_AlarmMask_All);

  if (RTC_Format == RTC_Format_BIN)
  {
    RTC_AlarmStruct->RTC_AlarmTime.RTC_Hours = RTC_Bcd2ToByte(RTC_AlarmStruct-> \
                                                        RTC_AlarmTime.RTC_Hours);
    RTC_AlarmStruct->RTC_AlarmTime.RTC_Minutes = RTC_Bcd2ToByte(RTC_AlarmStruct-> \
                                                        RTC_AlarmTime.RTC_Minutes);
    RTC_AlarmStruct->RTC_AlarmTime.RTC_Seconds = RTC_Bcd2ToByte(RTC_AlarmStruct-> \
                                                        RTC_AlarmTime.RTC_Seconds);
    RTC_AlarmStruct->RTC_AlarmDateWeekDay = RTC_Bcd2ToByte(RTC_AlarmStruct->RTC_AlarmDateWeekDay);
  }  
}

/**
  * @brief  Enables or disables the specified RTC Alarm.
  * @param  RTC_Alarm: specifies the alarm to be configured.
  *          This parameter can be any combination of the following values:
  *            @arg RTC_Alarm_A: to select Alarm A
  *            @arg RTC_Alarm_B: to select Alarm B  
  * @param  NewState: new state of the specified alarm.
  *          This parameter can be: ENABLE or DISABLE.
  * @retval An ErrorStatus enumeration value:
  *          - SUCCESS: RTC Alarm is enabled/disabled
  *          - ERROR: RTC Alarm is not enabled/disabled  
  */
ErrorStatus RTC_AlarmCmd(uint32_t RTC_Alarm, FunctionalState NewState)
{
  __IO uint32_t alarmcounter = 0x00;
  uint32_t alarmstatus = 0x00;
  ErrorStatus status = ERROR;
    
  /* Check the parameters */
  assert_param(IS_RTC_CMD_ALARM(RTC_Alarm));
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  /* Disable the write protection for RTC registers */
  RTC->WPR = 0xCA;
  RTC->WPR = 0x53;

  /* Configure the Alarm state */
  if (NewState != DISABLE)
  {
    RTC->CR |= (uint32_t)RTC_Alarm;

    status = SUCCESS;    
  }
  else
  { 
    /* Disable the Alarm in RTC_CR register */
    RTC->CR &= (uint32_t)~RTC_Alarm;
   
    /* Wait till RTC ALRxWF flag is set and if Time out is reached exit */
    do
    {
      alarmstatus = RTC->ISR & (RTC_Alarm >> 8);
      alarmcounter++;  
    } while((alarmcounter != INITMODE_TIMEOUT) && (alarmstatus == 0x00));
    
    if ((RTC->ISR & (RTC_Alarm >> 8)) == RESET)
    {
      status = ERROR;
    } 
    else
    {
      status = SUCCESS;
    }        
  }