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 * Copyright (c) 2015 - 2017, Nordic Semiconductor ASA
 * 
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 * are permitted provided that the following conditions are met:
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 *    list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
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 *    materials provided with the distribution.
 * 
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 * 
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
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 */
#ifndef HARDFAULT_H__
#define HARDFAULT_H__
#include <stdint.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif
/**
 * @defgroup hardfault_default HardFault exception
 * @{
 * @brief Default HardFault exception implementation.
 * @ingroup app_common
 */

/**
 * @brief Contents of the stack.
 *
 * This structure is used to re-create the stack layout after a HardFault exception was raised.
 */
typedef struct HardFault_stack
{
    uint32_t r0;  ///< R0 register.
    uint32_t r1;  ///< R1 register.
    uint32_t r2;  ///< R2 register.
    uint32_t r3;  ///< R3 register.
    uint32_t r12; ///< R12 register.
    uint32_t lr;  ///< Link register.
    uint32_t pc;  ///< Program counter.
    uint32_t psr; ///< Program status register.
} HardFault_stack_t;

/**
 * @brief Function for processing HardFault exceptions.
 *
 * An application that needs to process HardFault exceptions should provide an implementation of this function.
 * It will be called from the HardFault handler.
 * If no implementation is provided, the library uses a default one, which just restarts the MCU.
 *
 * @note If the DEBUG_NRF macro is defined, the software breakpoint is set just before the call
 *       to this function.
 *
 * @param p_stack Pointer to the stack bottom.
 *                This pointer might be NULL if the HardFault was called when the main stack was
 *                the active stack and a stack overrun is detected.
 *                In such a situation, the stack pointer is reinitialized to the default position,
 *                and the stack content is lost.
 */
void HardFault_process(HardFault_stack_t * p_stack);

/** @} */

#ifdef __cplusplus
}
#endif

#endif /* HARDFAULT_H__ */
