rt-thread/bsp/apm32/libraries/APM32F4xx_Library/APM32F4xx_StdPeriphDriver/inc/apm32f4xx_iwdt.h

/*!
 * @file        apm32f4xx_iwdt.h
 *
 * @brief       This file contains all the functions prototypes for the IWDT  firmware library.
 *
 * @version     V1.0.2
 *
 * @date        2022-06-23
 *
 * @attention
 *
 *  Copyright (C) 2021-2022 Geehy Semiconductor
 *
 *  You may not use this file except in compliance with the
 *  GEEHY COPYRIGHT NOTICE (GEEHY SOFTWARE PACKAGE LICENSE).
 *
 *  The program is only for reference, which is distributed in the hope
 *  that it will be usefull and instructional for customers to develop
 *  their software. Unless required by applicable law or agreed to in
 *  writing, the program is distributed on an "AS IS" BASIS, WITHOUT
 *  ANY WARRANTY OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the GEEHY SOFTWARE PACKAGE LICENSE for the governing permissions
 *  and limitations under the License.
 */

/* Define to prevent recursive inclusion */
#ifndef __APM32F4XX_IWDT_H
#define __APM32F4XX_IWDT_H

#ifdef __cplusplus
  extern "C" {
#endif

/* Includes */
#include "apm32f4xx.h"

/** @addtogroup APM32F4xx_StdPeriphDriver
  @{
*/

/** @addtogroup IWDT_Driver
  @{
*/

/** @defgroup IWDT_Enumerations
  @{
*/

/**
 * @brief IWDT KEYWORD define
 */
typedef enum
{
    IWDT_KEYWORD_RELOAD = 0xAAAA,   /*!< Reload IWDT_CNTRLD register */
    IWDT_KEYWORD_ENABLE = 0xCCCC    /*!< Activate watchdog */
} IWDT_KEYWORD_T;

/**
 * @brief IWDT Write Access define
 */
typedef enum
{
    IWDT_WRITEACCESS_ENABLE  = 0x5555,  /*!< Allow access IWDT register */
    IWDT_WRITEACCESS_DISABLE = 0x0000   /*!< Disable access IWDT register */
} IWDT_WRITEACCESS_T;

/**
 * @brief IWDT Divider
 */
typedef enum
{
    IWDT_DIVIDER_4   = 0x00,    /*!< Prescaler divider equal to 4 */
    IWDT_DIVIDER_8   = 0x01,    /*!< Prescaler divider equal to 8 */
    IWDT_DIVIDER_16  = 0x02,    /*!< Prescaler divider equal to 16 */
    IWDT_DIVIDER_32  = 0x03,    /*!< Prescaler divider equal to 32 */
    IWDT_DIVIDER_64  = 0x04,    /*!< Prescaler divider equal to 64 */
    IWDT_DIVIDER_128 = 0x05,    /*!< Prescaler divider equal to 128 */
    IWDT_DIVIDER_256 = 0x06     /*!< Prescaler divider equal to 256 */
} IWDT_DIVIDER_T;

/**
 * @brief IWDT Flag
 */
typedef enum
{
    IWDT_FLAG_PSCU = BIT0,  /*!< Watchdog Prescaler Factor Update flag */
    IWDT_FLAG_CNTU = BIT1   /*!< Watchdog Counter Reload Value Update flag */
} IWDT_FLAG_T;

/**@} end of group IWDT_Enumerations*/

/** @defgroup IWDT_Functions
  @{
*/

/* Enable IWDT */
void IWDT_Enable(void);

/* Refresh IWDT */
void IWDT_Refresh(void);

/* Counter reload */
void IWDT_ConfigReload(uint16_t reload);

/* Divider */
void IWDT_ConfigDivider(uint8_t div);

/* Write Access */
void IWDT_EnableWriteAccess(void);
void IWDT_DisableWriteAccess(void);

/* flag */
uint8_t IWDT_ReadStatusFlag(uint16_t flag);

#ifdef __cplusplus
}
#endif

#endif /* __APM32F4XX_IWDT_H */

/**@} end of group IWDT_Enumerations */
/**@} end of group IWDT_Driver */
/**@} end of group APM32F4xx_StdPeriphDriver */