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/*
ChibiOS - Copyright (C) 2016 Stephane D'Alu
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file WDTv1/hal_wdg_lld.h
* @brief NRF5 Watchdog Driver subsystem low level driver header template.
*
* @addtogroup WDG
* @{
*/
#ifndef HAL_WDG_LLD_H
#define HAL_WDG_LLD_H
#if (HAL_USE_WDG == TRUE) || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
#define WDG_MAX_TIMEOUT_MS \
((uint32_t)(0xFFFFFFFFu * 1000 / NRF5_LFCLK_FREQUENCY))
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name Configuration options
* @{
*/
/**
* @brief WDG driver implement timeout callback.
* @note The default is @p FALSE.
*/
#if !defined(WDG_USE_TIMEOUT_CALLBACK) || defined(__DOXYGEN__)
#define WDG_USE_TIMEOUT_CALLBACK FALSE
#endif
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Type of a structure representing an WDG driver.
*/
typedef struct WDGDriver WDGDriver;
/**
* @brief Driver configuration structure.
* @note It could be empty on some architectures.
*/
typedef struct {
struct {
/**
* @brief Pause watchdog while the CPU is sleeping
*/
uint8_t pause_on_sleep : 1;
/**
* @brief Pause watchdog while the CPU is halted by the debugger
*/
uint8_t pause_on_halt : 1;
};
/**
*
*/
uint32_t timeout_ms;
#if WDG_USE_TIMEOUT_CALLBACK == TRUE
/**
* @brief Notification callback when watchdog timedout
*
* @note About 2 cycles at NRF5_LFCLK_FREQUENCY are available
* before automatic reboot.
*
*/
void (*callback)(void);
#endif
} WDGConfig;
/**
* @brief Structure representing an WDG driver.
*/
struct WDGDriver {
/**
* @brief Driver state.
*/
wdgstate_t state;
/**
* @brief Current configuration data.
*/
const WDGConfig *config;
/* End of the mandatory fields.*/
NRF_WDT_Type *wdt;
};
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
extern WDGDriver WDGD1;
#ifdef __cplusplus
extern "C" {
#endif
void wdg_lld_init(void);
void wdg_lld_start(WDGDriver *wdgp);
void wdg_lld_stop(WDGDriver *wdgp);
void wdg_lld_reset(WDGDriver *wdgp);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_WDG == TRUE */
#endif /* HAL_WDG_LLD_H */
/** @} */
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