text: /**************************************************************************//**
   * @file     wwdt.h
   * @brief    NUC980 WWDT driver header file
   *
   * SPDX-License-Identifier: Apache-2.0
   * @copyright (C) 2018 Nuvoton Technology Corp. All rights reserved.
   *****************************************************************************/
  #ifndef __NU_WWDT_H__
  #define __NU_WWDT_H__
  #include "nuc980.h"
  #ifdef __cplusplus
  extern "C"
  {
  #endif
  
  
  /** @addtogroup Standard_Driver Standard Driver
    @{
  */
  
  /** @addtogroup WWDT_Driver WWDT Driver
    @{
  */
  
  /** @addtogroup WWDT_EXPORTED_CONSTANTS WWDT Exported Constants
    @{
  */
  #define WWDT_PRESCALER_1          (0UL << 8)   ///< WWDT setting prescaler to 1     \hideinitializer 
  #define WWDT_PRESCALER_2          (1UL << 8)   ///< WWDT setting prescaler to 2     \hideinitializer 
  #define WWDT_PRESCALER_4          (2UL << 8)   ///< WWDT setting prescaler to 4     \hideinitializer 
  #define WWDT_PRESCALER_8          (3UL << 8)   ///< WWDT setting prescaler to 8     \hideinitializer 
  #define WWDT_PRESCALER_16         (4UL << 8)   ///< WWDT setting prescaler to 16    \hideinitializer 
  #define WWDT_PRESCALER_32         (5UL << 8)   ///< WWDT setting prescaler to 32    \hideinitializer 
  #define WWDT_PRESCALER_64         (6UL << 8)   ///< WWDT setting prescaler to 64    \hideinitializer 
  #define WWDT_PRESCALER_128        (7UL << 8)   ///< WWDT setting prescaler to 128   \hideinitializer 
  #define WWDT_PRESCALER_192        (8UL << 8)   ///< WWDT setting prescaler to 192   \hideinitializer 
  #define WWDT_PRESCALER_256        (9UL << 8)   ///< WWDT setting prescaler to 256   \hideinitializer 
  #define WWDT_PRESCALER_384        (0xAUL << 8) ///< WWDT setting prescaler to 384   \hideinitializer 
  #define WWDT_PRESCALER_512        (0xBUL << 8) ///< WWDT setting prescaler to 512   \hideinitializer 
  #define WWDT_PRESCALER_768        (0xCUL << 8) ///< WWDT setting prescaler to 768   \hideinitializer 
  #define WWDT_PRESCALER_1024       (0xDUL << 8) ///< WWDT setting prescaler to 1024  \hideinitializer 
  #define WWDT_PRESCALER_1536       (0xEUL << 8) ///< WWDT setting prescaler to 1536  \hideinitializer 
  #define WWDT_PRESCALER_2048       (0xFUL << 8) ///< WWDT setting prescaler to 2048  \hideinitializer 
  
  #define WWDT_RELOAD_WORD          (0x00005AA5) ///< Fill this value to RLD register to reload WWDT counter  \hideinitializer 
  /*@}*/ /* end of group WWDT_EXPORTED_CONSTANTS */
  
  
  /** @addtogroup WWDT_EXPORTED_FUNCTIONS WWDT Exported Functions
    @{
  */
  
  /**
    * @brief This macro clear WWDT time-out reset system flag.
    * @return None
    * \hideinitializer
    */
  #define WWDT_CLEAR_RESET_FLAG()  outpw(REG_WWDT_STATUS, 0x2)
  
  /**
    * @brief This macro clear WWDT compare match interrupt flag.
    * @return None
    * \hideinitializer
    */
  #define WWDT_CLEAR_INT_FLAG() outpw(REG_WWDT_STATUS, 0x1)
  
  /**
    * @brief This macro is use to get WWDT time-out reset system flag.
    * @return WWDT reset system or not
    * @retval 0 WWDT did not cause system reset
    * @retval 1 WWDT caused system reset
    * \hideinitializer
    */
  #define WWDT_GET_RESET_FLAG() (inpw(REG_WWDT_STATUS) & 0x2 ? 1 : 0)
  
  /**
    * @brief This macro is used to indicate WWDT compare match interrupt flag.
    * @return WWDT compare match interrupt occurred or not
    * @retval 0 WWDT compare match interrupt did not occur
    * @retval 1 WWDT compare match interrupt occurred
    * \hideinitializer
    */
  #define WWDT_GET_INT_FLAG() (inpw(REG_WWDT_STATUS) & 0x1 ? 1 : 0)
  
  /**
    * @brief This macro to reflects current WWDT counter value
    * @return Return current WWDT counter value
    * \hideinitializer
    */
  #define WWDT_GET_COUNTER() inpw(REG_WWDT_CNT)
  
  /**
    * @brief This macro is used to reload the WWDT counter value to 0x3F.
    * @return None
    * @details After WWDT enabled, application must reload WWDT counter while
    *          current counter is less than compare value and larger than 0,
    *          otherwise WWDT will cause system reset.
    * \hideinitializer
    */
  #define WWDT_RELOAD_COUNTER() outpw(REG_WWDT_RLDCNT, WWDT_RELOAD_WORD)
  
  
  void WWDT_Open(UINT u32PreScale, UINT u32CmpValue, UINT u32EnableInt);
  
  
  /*@}*/ /* end of group WWDT_EXPORTED_FUNCTIONS */
  
  /*@}*/ /* end of group WWDT_Driver */
  
  /*@}*/ /* end of group Standard_Driver */
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif //__NU_WWDT_H__
  
  
  