text: /**
   * Copyright (c) 2014 - 2017, Nordic Semiconductor ASA
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  /**@file
   * @addtogroup nrf_wdt WDT HAL and driver
   * @ingroup nrf_drivers
   * @brief Watchdog timer (WDT) APIs.
   * @details The WDT HAL provides basic APIs for accessing the registers of the watchdog timer.
   * The WDT driver provides APIs on a higher level.
   * @defgroup nrf_drv_wdt WDT driver
   * @{
   * @ingroup  nrf_wdt
   *
   * @brief    Driver for managing the watchdog timer (WDT).
   */
  
  #ifndef NRF_DRV_WDT_H__
  #define NRF_DRV_WDT_H__
  
  #include <stdbool.h>
  #include <stdint.h>
  #include "sdk_errors.h"
  #include "nrf_wdt.h"
  #include "sdk_config.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /**@brief Struct for WDT initialization. */
  typedef struct
  {
      nrf_wdt_behaviour_t    behaviour;          /**< WDT behaviour when CPU in sleep/halt mode. */
      uint32_t               reload_value;       /**< WDT reload value in ms. */
      uint8_t                interrupt_priority; /**< WDT interrupt priority */
  } nrf_drv_wdt_config_t;
  
  /**@brief WDT event handler function type. */
  typedef void (*nrf_wdt_event_handler_t)(void);
  
  /**@brief WDT channel id type. */
  typedef nrf_wdt_rr_register_t nrf_drv_wdt_channel_id;
  
  #define NRF_DRV_WDT_DEAFULT_CONFIG                                       \
      {                                                                    \
          .behaviour          = (nrf_wdt_behaviour_t)WDT_CONFIG_BEHAVIOUR, \
          .reload_value       = WDT_CONFIG_RELOAD_VALUE,                   \
          .interrupt_priority = WDT_CONFIG_IRQ_PRIORITY,                   \
      }
  /**
   * @brief This function initializes watchdog.
   *
   * @param[in] p_config          Initial configuration. Default configuration used if NULL.
   * @param[in] wdt_event_handler specifies event handler provided by user.
   *
   * @note Function asserts if wdt_event_handler is NULL.
   *
   * @return    NRF_SUCCESS on success, otherwise an error code.
   */
  ret_code_t nrf_drv_wdt_init(nrf_drv_wdt_config_t const * p_config,
                              nrf_wdt_event_handler_t     wdt_event_handler);
  
  /**
   * @brief This function allocate watchdog channel.
   *
   * @note This function can not be called after nrf_drv_wdt_start(void).
   *
   * @param[out] p_channel_id      ID of granted channel.
   *
   * @return    NRF_SUCCESS on success, otherwise an error code.
   */
  ret_code_t nrf_drv_wdt_channel_alloc(nrf_drv_wdt_channel_id * p_channel_id);
  
  /**
   * @brief This function starts watchdog.
   *
   * @note After calling this function the watchdog is started, so the user needs to feed all allocated
   *       watchdog channels to avoid reset. At least one watchdog channel has to be allocated.
   */
  void nrf_drv_wdt_enable(void);
  
  /**
   * @brief This function feeds the watchdog.
   *
   * @details Function feeds all allocated watchdog channels.
   */
  void nrf_drv_wdt_feed(void);
  
  /**
   * @brief This function feeds the invidual watchdog channel.
   *
   * @param[in] channel_id      ID of watchdog channel.
   */
  void nrf_drv_wdt_channel_feed(nrf_drv_wdt_channel_id channel_id);
  
  /**@brief Function for returning a requested task address for the wdt driver module.
   *
   * @param[in]  task                One of the peripheral tasks.
   *
   * @retval     Task address.
   */
  __STATIC_INLINE uint32_t nrf_drv_wdt_ppi_task_addr(nrf_wdt_task_t task)
  {
      return nrf_wdt_task_address_get(task);
  }
  
  /**@brief Function for returning a requested event address for the wdt driver module.
   *
   * @param[in]  event               One of the peripheral events.
   *
   * @retval     Event address
   */
  __STATIC_INLINE uint32_t nrf_drv_wdt_ppi_event_addr(nrf_wdt_event_t event)
  {
      return nrf_wdt_event_address_get(event);
  }
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif
  
  /** @} */
  