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

* File Name          : 91x_wdg.c

* Author             : MCD Application Team

* Date First Issued  : 05/18/2006 : Version 1.0

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

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

* History:

* 05/24/2006 : Version 1.1

* 05/18/2006 : Version 1.0

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

* 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 "91x_wdg.h"

#include "91x_scu.h"

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

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

/* WDG End of Count interrupt Flag */

#define WDG_FLAG_EC  0x0001

/* WDG End of Count interrupt request */

#define WDG_IT_EC    0x0001

/* WDG Start/Stop counter */

#define WDG_Counter_Start  0x0002

#define WDG_Counter_Stop   0xFFFD

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

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

/* Registers reset value */

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

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

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

* Function Name  : WDG_DeInit

* Description    : Deinitializes the WDG peripheral registers to their default

*                  reset values.

* Input          : None

* Output         : None

* Return         : None

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

void WDG_DeInit(void)

{

  SCU_APBPeriphReset(__WDG, ENABLE);  /*WDG peripheral under Reset */

  SCU_APBPeriphReset(__WDG, DISABLE);  /*WDG peripheral Reset off*/

}

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

* Function Name  : WDG_StructInit

* Description    : Fills the WDG_InitTypeDef structure member with its reset

*                  value.

* Input          : WDG_InitStruct : pointer to a WDG_InitTypeDef structure

*                  which will be initialized.

* Output         : None

* Return         : None

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

void WDG_StructInit(WDG_InitTypeDef *WDG_InitStruct)

{

  /* Select the Watchdog running mode*/

  WDG_InitStruct->WDG_Mode = WDG_Mode_Timer;

  /* Select the source clock */

  WDG_InitStruct-> WDG_ClockSource = WDG_ClockSource_Apb;

   /* Initialize Prescaler */

  WDG_InitStruct->WDG_Prescaler =0xFF;

  /* Initialize Preload */

  WDG_InitStruct->WDG_Preload =0xFFFF;

}

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

* Function Name  : WDG_Init

* Description    : Initializes WDG  peripheral according to the specified

*                  parameters in the WDG_InitStruct.

* Input          : WDG_InitStruct: pointer to a WDG_InitTypeDef structure that

*                  contains the configuration information for the WDG peripheral.

* Output         : None

* Return         : None

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

void WDG_Init(WDG_InitTypeDef* WDG_InitStruct)

{

 if(WDG_InitStruct->WDG_ClockSource == WDG_ClockSource_Apb)

  {

    /* Select The APB clock as clock source */

    WDG->CR &= WDG_ClockSource_Apb;

  }

  else

  {

    /* Select the RTC clock as source */

    WDG->CR |= WDG_ClockSource_Rtc ;

  }

  /* Configure WDG Prescaler register value */

  WDG->PR = WDG_InitStruct->WDG_Prescaler;

  /* Configure WDG Pre-load register value */

  WDG->VR = WDG_InitStruct->WDG_Preload ;

  if(WDG_InitStruct->WDG_Mode == WDG_Mode_Timer)

  {

    /* Select Timer mode */

    WDG->CR &= WDG_Mode_Timer;

  }

  else

  {

    /* Select WDG mode */

    WDG->CR |= WDG_Mode_Wdg ;

  }

}

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

* Function Name  : WDG_Cmd

* Description    : Enables or disables the WDG peripheral.

* Input          : NewState: new state of the WDG peripheral (Newstate can be

*                  ENABLE or DISABLE)

* Output         : None

* Return         : None

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

void WDG_Cmd(FunctionalState NewState )

{

  if((WDG->CR & WDG_Mode_Wdg) == 0)

  {

    /* Timer mode */

    if(NewState == ENABLE)

    {

      /* Start timer by setting SC bit in Control register */

      WDG->CR |= WDG_Counter_Start;

    }

    else

    {

      /* Stop timer by clearning SC bit in Control register */

      WDG->CR &= WDG_Counter_Stop;

    }

  }

  else

  {

    /* Watchdog mode */

    if(NewState == ENABLE)

    {

      WDG->KR = WDG_KeyValue1;

      WDG->KR = WDG_KeyValue2;

    }

  }

}

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

* Function Name  : WDG_ITConfig

* Description    : Enables or disables the WDG End of Count(EC) interrupt.

* Input          : Newstate:  new state of the End of Count(EC) WDG interrupt.

*                  This parameter can be: ENABLE or DISABLE.

* Output         : None

* Return         : None

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

void WDG_ITConfig(FunctionalState NewState)

{

  if(NewState == ENABLE)

  {

    /* Enable the End of Count interrupt */

    WDG->MR |= WDG_IT_EC;

  }

  else

  {

    /* Disable the End of Count interrupt */

    WDG->MR &= ~WDG_IT_EC;

  }

}

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

* Function Name  : WDG_GetCounter

* Description    : Gets the WDG’s current counter value.

* Input          : None

* Output         : None

* Return         : The WDG current counter value

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

u16 WDG_GetCounter(void)

{

   return WDG->CNT;

}

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

* Function Name  : WDG_GetITStatus

* Description    : Checks whether the WDG End of Count(EC) interrupt is occured or not.

* Input          : None

* Output         : None

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

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

ITStatus WDG_GetITStatus(void)

{

  if(((WDG->SR & WDG_IT_EC) != RESET )&&((WDG->MR & WDG_IT_EC) != RESET ))

  {

    return SET;

  }

  else

  {

    return RESET;

  }

}

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

* Function Name  : WDG_ClearITPendingBit

* Description    : Clears the WDG's End of Count(EC) interrupt pending bit.

* Input          : None

* Output         : None

* Return         : None

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

void WDG_ClearITPendingBit(void)

{

 /* Clear the EC pending bit */

  WDG->SR &= ~WDG_IT_EC;

}

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

* Function Name  : WDG_ClearFlag

* Description    : Clears the WDG's End of Count(EC) Flag.

* Input          : None

* Output         : None

* Return         : None

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

void WDG_ClearFlag(void)

{

 /* Clear the EC Flag */

  WDG->SR &= ~WDG_FLAG_EC;

}

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

* Function Name  : WDG_GetFlagStatus

* Description    : Checks whether the WDG End of Count(EC) flag is set or not.

* Input          : None

* Output         : None

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

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

FlagStatus WDG_GetFlagStatus(void)

{

  if((WDG->SR & WDG_FLAG_EC) != RESET )

  {

    return SET;

  }

  else

  {

    return RESET;

  }

}

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