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/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************

* File Name          : 75x_rtc.c

* Author             : MCD Application Team

* Date First Issued  : 03/10/2006

* Description        : This file provides all the RTC software functions.

********************************************************************************

* History:

* 07/17/2006 : V1.0

* 03/10/2006 : V0.1

********************************************************************************

* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS

* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.

* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,

* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE

* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING

* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

*******************************************************************************/

/* Includes ------------------------------------------------------------------*/

#include "75x_rtc.h"

#include "75x_mrcc.h"

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

#define RTC_CNF_Enable_Mask      0x0010      /* Configuration Flag Enable Mask */

#define RTC_CNF_Disable_Mask     0xFFEF      /* Configuration Flag Disable Mask */

#define RTC_LSB_Mask             0x0000FFFF  /* RTC LSB Mask */

#define RTC_MSB_Mask             0xFFFF0000  /* RTC MSB Mask */

#define RTC_Prescaler_MSB_Mask   0x000F0000  /* RTC Prescaler MSB Mask */

/* Private macro -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

/* Private function prototypes -----------------------------------------------*/

/* Private functions ---------------------------------------------------------*/

/*******************************************************************************

* Function Name  : RTC_DeInit

* Description    : Deinitializes the RTC peripheral registers to their

*                  default reset values.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void RTC_DeInit(void)

{

  MRCC_PeripheralSWResetConfig(MRCC_Peripheral_RTC,ENABLE);

  MRCC_PeripheralSWResetConfig(MRCC_Peripheral_RTC,DISABLE);

}

/*******************************************************************************

* Function Name  : RTC_ITConfig

* Description    : Enables or disables the specified RTC interrupts.

* Input          : - RTC_IT: specifies the RTC interrupts sources to be enabled

*                    or disabled.

*                    This parameter can be a combination of one or more of the

*                    following values:

*                       - RTC_IT_Overflow: Overflow interrupt

*                       - RTC_IT_Alarm: Alarm interrupt

*                       - RTC_IT_Second: Second interrupt

*                 - NewState: new state of the specified RTC interrupts.

*                   This parameter can be: ENABLE or DISABLE.

* Output         : None

* Return         : None

*******************************************************************************/

void RTC_ITConfig(u16 RTC_IT, FunctionalState NewState)

{

  if(NewState == ENABLE)

  {

    RTC->CRH |= RTC_IT;

  }

  else

  {

    RTC->CRH &= ~RTC_IT;

  }

}

/*******************************************************************************

* Function Name  : RTC_EnterConfigMode

* Description    : Enters the RTC configuration mode.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void RTC_EnterConfigMode(void)

{

  /* Set the CNF flag to enter in the Configuration Mode */

  RTC->CRL |= RTC_CNF_Enable_Mask;

}

/*******************************************************************************

* Function Name  : RTC_ExitConfigMode

* Description    : Exits from the RTC configuration mode.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void RTC_ExitConfigMode(void)

{

  /* Reset the CNF flag to exit from the Configuration Mode */

  RTC->CRL &= RTC_CNF_Disable_Mask;

}

/*******************************************************************************

* Function Name  : RTC_GetCounter

* Description    : Gets the RTC counter value.

* Input          : None

* Output         : None

* Return         : RTC counter value.

*******************************************************************************/

u32 RTC_GetCounter(void)

{

  u16 Tmp = 0;

  Tmp = RTC->CNTL;

  return (((u32)RTC->CNTH << 16 ) |Tmp) ;

}

/*******************************************************************************

* Function Name  : RTC_SetCounter

* Description    : Sets the RTC counter value.

* Input          : RTC counter new value.

* Output         : None

* Return         : None

*******************************************************************************/

void RTC_SetCounter(u32 CounterValue)

{

  RTC_EnterConfigMode();

/* COUNTER Config ------------------------------------------------------------*/

  /* Set RTC COUNTER MSB word */

  RTC->CNTH =(CounterValue & RTC_MSB_Mask) >> 16;

  /* Set RTC COUNTER LSB word */

  RTC->CNTL =(CounterValue & RTC_LSB_Mask);

  RTC_ExitConfigMode();

}

/*******************************************************************************

* Function Name  : RTC_SetPrescaler

* Description    : Sets the RTC prescaler value.

* Input          : RTC prescaler new value.

* Output         : None

* Return         : None

*******************************************************************************/

void RTC_SetPrescaler(u32 PrescalerValue)

{

  RTC_EnterConfigMode();

/* PRESCALER Config ----------------------------------------------------------*/

  /* Set RTC PRESCALER MSB word */

  RTC->PRLH = (PrescalerValue & RTC_Prescaler_MSB_Mask) >> 16;

  /* Set RTC PRESCALER LSB word */

  RTC->PRLL = (PrescalerValue & RTC_LSB_Mask);

  RTC_ExitConfigMode();

}

/*******************************************************************************

* Function Name  : RTC_GetPrescaler

* Description    : Gets the RTC prescaler value.

* Input          : None

* Output         : None

* Return         : RTC prescaler value.

*******************************************************************************/

u32 RTC_GetPrescaler(void)

{

  u16 Tmp = 0;

  Tmp = RTC->PRLL;

  return (((u32)(RTC->PRLH & 0x000F) << 16 ) | Tmp);

}

/*******************************************************************************

* Function Name  : RTC_SetAlarm

* Description    : Sets the RTC alarm value.

* Input          : RTC alarm new value.

* Output         : None

* Return         : None

*******************************************************************************/

void RTC_SetAlarm(u32 AlarmValue)

{

  RTC_EnterConfigMode();

/* ALARM Config --------------------------------------------------------------*/

  /* Set the ALARM MSB word */

  RTC->ALRH = (AlarmValue & RTC_MSB_Mask) >> 16;

  /* Set the ALARM LSB word */

  RTC->ALRL = (AlarmValue & RTC_LSB_Mask);

  RTC_ExitConfigMode();

}

/*******************************************************************************

* Function Name  : RTC_GetDivider

* Description    : Gets the RTC divider value.

* Input          : None

* Output         : None

* Return         : RTC Divider value.

*******************************************************************************/

u32 RTC_GetDivider(void)

{

  u16 Tmp = 0;

  Tmp = RTC->DIVL ;

  return (((u32)(RTC->DIVH & 0x000F) << 16 ) | Tmp);

}

/*******************************************************************************

* Function Name  : RTC_WaitForLastTask

* Description    : Waits until last write operation on RTC registers has finished.

*                  This function must be called before any write to RTC registers.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void RTC_WaitForLastTask(void)

{

  /* Loop until RTOFF flag is set */

  while ((RTC->CRL & RTC_FLAG_RTOFF) == RESET);

}

/*******************************************************************************

* Function Name  : RTC_WaitForSynchro

* Description    : Waits until the RTC registers (RTC_CNT, RTC_ALR and RTC_PRL)

*                  are synchronized with RTC APB clock.

*                  This function must be called before any read operation after

*                  an APB reset or an APB clock stop.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void RTC_WaitForSynchro(void)

{

  /* Clear RSF flag */

  RTC->CRL &= ~RTC_FLAG_RSF;

  /* Loop until RSF flag is set */

  while((RTC->CRL & RTC_FLAG_RSF)== RESET);

}

/*******************************************************************************

* Function Name  : RTC_GetFlagStatus

* Description    : Checks whether the specified RTC flag is set or not.

* Input          : RTC_FLAG: specifies the flag to check.

*                  This parameter can be one the following values:

*                        - RTC_FLAG_RTOFF: RTC Operation OFF flag

*                        - RTC_FLAG_RSF: Registers Synchronized flag

*                        - RTC_FLAG_Overflow: Overflow interrupt flag

*                        - RTC_FLAG_Alarm: Alarm interrupt flag

*                        - RTC_FLAG_Second: Second interrupt flag

* Output         : None

* Return         : The new state of RTC_FLAG (SET or RESET).

*******************************************************************************/

FlagStatus RTC_GetFlagStatus(u16 RTC_FLAG)

{

  if((RTC->CRL & RTC_FLAG) != RESET)

  {

    return SET;

  }

  else

  {

    return RESET;

  }

}

/*******************************************************************************

* Function Name  : RTC_ClearFlag

* Description    : Clears the RTC’s pending flags.

* Input          : RTC_FLAG: specifies the flag to clear.

*                    This parameter can be a combination of one or more of

*                    the following values:

*                        - RTC_FLAG_RSF: Registers Synchronized flag. This flag

*                          is cleared only after an APB reset or an APB Clock stop.

*                        - RTC_FLAG_Overflow: Overflow interrupt flag

*                        - RTC_FLAG_Alarm: Alarm interrupt flag

*                        - RTC_FLAG_Second: Second interrupt flag

* Output         : None

* Return         : None

*******************************************************************************/

void RTC_ClearFlag(u16 RTC_FLAG)

{

  /* Clear the coressponding RTC flag */

  RTC->CRL &= ~RTC_FLAG;

}

/*******************************************************************************

* Function Name  : RTC_GetITStatus

* Description    : Checks whether the specified RTC interrupt has occured or not.

* Input          : RTC_IT: specifies the RTC interrupts sources to check.

*                   This parameter can be a combination of one or more of

*                   the following values:

*                       - RTC_IT_Overflow: Overflow interrupt

*                       - RTC_IT_Alarm: Alarm interrupt

*                       - RTC_IT_Second: Second interrupt

* Output         : None

* Return         : The new state of the RTC_IT (SET or RESET).

*******************************************************************************/

ITStatus RTC_GetITStatus(u16 RTC_IT)

{

  if(((RTC->CRH & RTC_IT) != RESET)&& ((RTC->CRL & RTC_IT) != RESET))

  {

    return SET;

  }

  else

  {

    return RESET;

  }

}

/*******************************************************************************

* Function Name  : RTC_ClearITPendingBit

* Description    : Clears the RTC’s interrupt pending bits.

* Input          : RTC_IT: specifies the interrupt pending bit to clear.

*                   This parameter can be any combination of one or more of

*                   the following values:

*                       - RTC_IT_Overflow: Overflow interrupt

*                       - RTC_IT_Alarm: Alarm interrupt

*                       - RTC_IT_Second: Second interrupt

* Output         : None

* Return         : None

*******************************************************************************/

void RTC_ClearITPendingBit(u16 RTC_IT)

{

  /* Clear the coressponding RTC pending bit */

  RTC->CRL &= ~RTC_IT;

}

/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/