rt-thread-official/bsp/nuvoton_m451/Libraries/StdDriver/inc/wwdt.h

/**************************************************************************//**
 * @file     wwdt.h
 * @version  V3.00
 * $Revision: 7 $
 * $Date: 15/08/11 10:26a $
 * @brief    M451 series WWDT driver header file
 *
 * @note
 * Copyright (C) 2013~2015 Nuvoton Technology Corp. All rights reserved.
 *****************************************************************************/
#ifndef __WWDT_H__
#define __WWDT_H__

#ifdef __cplusplus
extern "C"
{
#endif


/** @addtogroup Standard_Driver Standard Driver
  @{
*/

/** @addtogroup WWDT_Driver WWDT Driver
  @{
*/

/** @addtogroup WWDT_EXPORTED_CONSTANTS WWDT Exported Constants
  @{
*/
/*---------------------------------------------------------------------------------------------------------*/
/*  WWDT Prescale Period Constant Definitions                                                              */
/*---------------------------------------------------------------------------------------------------------*/
#define WWDT_PRESCALER_1        (0 << WWDT_CTL_PSCSEL_Pos)  /*!< Select max time-out period to 1 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_2        (1 << WWDT_CTL_PSCSEL_Pos)  /*!< Select max time-out period to 2 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_4        (2 << WWDT_CTL_PSCSEL_Pos)  /*!< Select max time-out period to 4 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_8        (3 << WWDT_CTL_PSCSEL_Pos)  /*!< Select max time-out period to 8 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_16       (4 << WWDT_CTL_PSCSEL_Pos)  /*!< Select max time-out period to 16 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_32       (5 << WWDT_CTL_PSCSEL_Pos)  /*!< Select max time-out period to 32 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_64       (6 << WWDT_CTL_PSCSEL_Pos)  /*!< Select max time-out period to 64 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_128      (7 << WWDT_CTL_PSCSEL_Pos)  /*!< Select max time-out period to 128 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_192      (8 << WWDT_CTL_PSCSEL_Pos)  /*!< Select max time-out period to 192 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_256      (9 << WWDT_CTL_PSCSEL_Pos)  /*!< Select max time-out period to 256 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_384      (10 << WWDT_CTL_PSCSEL_Pos) /*!< Select max time-out period to 384 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_512      (11 << WWDT_CTL_PSCSEL_Pos) /*!< Select max time-out period to 512 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_768      (12 << WWDT_CTL_PSCSEL_Pos) /*!< Select max time-out period to 768 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_1024     (13 << WWDT_CTL_PSCSEL_Pos) /*!< Select max time-out period to 1024 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_1536     (14 << WWDT_CTL_PSCSEL_Pos) /*!< Select max time-out period to 1536 * (64*WWDT_CLK) */
#define WWDT_PRESCALER_2048     (15 << WWDT_CTL_PSCSEL_Pos) /*!< Select max time-out period to 2048 * (64*WWDT_CLK) */

/*---------------------------------------------------------------------------------------------------------*/
/*  WWDT Reload Counter Keyword Constant Definitions                                                       */
/*---------------------------------------------------------------------------------------------------------*/
#define WWDT_RELOAD_WORD        (0x00005AA5)                /*!< Fill this value to WWDT_RLDCNT register to reload WWDT counter */

/*@}*/ /* end of group WWDT_EXPORTED_CONSTANTS */


/** @addtogroup WWDT_EXPORTED_FUNCTIONS WWDT Exported Functions
  @{
*/

/**
  * @brief      Clear WWDT Reset System Flag
  *
  * @param      None
  *
  * @return     None
  *
  * @details    This macro is used to clear WWDT time-out reset system flag.
  */
#define WWDT_CLEAR_RESET_FLAG()     (WWDT->STATUS = (WWDT->STATUS & ~WWDT_STATUS_WWDTIF_Msk) | WWDT_STATUS_WWDTRF_Msk)

/**
  * @brief      Clear WWDT Compared Match Interrupt Flag
  *
  * @param      None
  *
  * @return     None
  *
  * @details    This macro is used to clear WWDT compared match interrupt flag.
  */
#define WWDT_CLEAR_INT_FLAG()       (WWDT->STATUS = (WWDT->STATUS & ~WWDT_STATUS_WWDTRF_Msk) | WWDT_STATUS_WWDTIF_Msk)

/**
  * @brief      Get WWDT Reset System Flag
  *
  * @param      None
  *
  * @retval     0   WWDT time-out reset system did not occur
  * @retval     1   WWDT time-out reset system occurred
  *
  * @details    This macro is used to indicate system has been reset by WWDT time-out reset or not.
  */
#define WWDT_GET_RESET_FLAG()       ((WWDT->STATUS & WWDT_STATUS_WWDTRF_Msk)? 1 : 0)

/**
  * @brief      Get WWDT Compared Match Interrupt Flag
  *
  * @param      None
  *
  * @retval     0   WWDT compare match interrupt did not occur
  * @retval     1   WWDT compare match interrupt occurred
  *
  * @details    This macro is used to indicate WWDT counter value matches CMPDAT value or not.
  */
#define WWDT_GET_INT_FLAG()         ((WWDT->STATUS & WWDT_STATUS_WWDTIF_Msk)? 1 : 0)

/**
  * @brief      Get WWDT Counter
  *
  * @param      None
  *
  * @return     WWDT Counter Value
  *
  * @details    This macro reflects the current WWDT counter value.
  */
#define WWDT_GET_COUNTER()          (WWDT->CNT)

/**
  * @brief      Reload WWDT Counter
  *
  * @param      None
  *
  * @return     None
  *
  * @details    This macro is used to reload the WWDT counter value to 0x3F.
  * @note       User can only write WWDT_RLDCNT register to reload WWDT counter value when current WWDT counter value \n
  *             between 0 and CMPDAT value. If user writes WWDT_RLDCNT when current WWDT counter value is larger than CMPDAT, \n
  *             WWDT reset signal will generate immediately to reset system.
  */
#define WWDT_RELOAD_COUNTER()       (WWDT->RLDCNT = WWDT_RELOAD_WORD)

void WWDT_Open(uint32_t u32PreScale, uint32_t u32CmpValue, uint32_t u32EnableInt);

/*@}*/ /* end of group WWDT_EXPORTED_FUNCTIONS */

/*@}*/ /* end of group WWDT_Driver */

/*@}*/ /* end of group Standard_Driver */

#ifdef __cplusplus
}
#endif

#endif //__WWDT_H__

/*** (C) COPYRIGHT 2013~2015 Nuvoton Technology Corp. ***/