171 lines
6.3 KiB
C
171 lines
6.3 KiB
C
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//*****************************************************************************
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//
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// am_hal_wdt.h
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//! @file
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//!
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//! @brief Hardware abstraction layer for the Watchdog Timer module.
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//!
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//! @addtogroup wdt1 Watchdog Timer (WDT)
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//! @ingroup apollo1hal
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//! @{
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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// Copyright (c) 2020, Ambiq Micro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// Third party software included in this distribution is subject to the
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// additional license terms as defined in the /docs/licenses directory.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// This is part of revision 2.4.2 of the AmbiqSuite Development Package.
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//
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//*****************************************************************************
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#ifndef AM_HAL_WDT_H
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#define AM_HAL_WDT_H
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#include <stdint.h>
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#include <stdbool.h>
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//*****************************************************************************
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//
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// Macro definitions
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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//! @name WDT Enable Reset in the WDT Configuration.
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//! @brief Macro definitions for WDT Reset Enable.
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//!
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//! These macros may be used with the am_hal_wdt_config_t structure to enable
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//! the watch dog timer to generate resets to the chip.
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//!
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//! @{
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//
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//*****************************************************************************
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#define AM_HAL_WDT_ENABLE_RESET AM_REG_WDT_CFG_RESEN(1)
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#define AM_HAL_WDT_DISABLE_RESET AM_REG_WDT_CFG_RESEN(0)
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//! @}
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//*****************************************************************************
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//
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//! @name WDT Enable Interrupt Generation from the WDT Configuration.
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//! @brief Macro definitions for WDT Interrupt Enable.
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//!
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//! These macros may be used with the am_hal_wdt_config_t structure to enable
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//! the watch dog timer to generate generate WDT interrupts.
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//!
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//! @{
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//
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//*****************************************************************************
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#define AM_HAL_WDT_ENABLE_INTERRUPT AM_REG_WDT_CFG_INTEN(1)
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#define AM_HAL_WDT_DISABLE_INTERRUPT AM_REG_WDT_CFG_INTEN(0)
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//! @}
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//*****************************************************************************
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//
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//! @brief Watchdog timer configuration structure.
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//!
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//! This structure is made to be used with the am_hal_wdt_init() function. It
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//! describes the configuration of the watchdog timer.
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//
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//*****************************************************************************
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typedef struct
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{
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//! Configuration Values for watchdog timer
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//! event is generated.
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uint32_t ui32Config;
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//! Number of watchdog timer ticks allowed before a watchdog interrupt
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//! event is generated.
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uint16_t ui16InterruptCount;
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//! Number of watchdog timer ticks allowed before the watchdog will issue a
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//! system reset.
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uint16_t ui16ResetCount;
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}
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am_hal_wdt_config_t;
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//*****************************************************************************
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//
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//! @brief Restarts the watchdog timer ("Pets" the dog)
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//!
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//! This function restarts the watchdog timer from the beginning, preventing
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//! any interrupt or reset even from occuring until the next time the watchdog
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//! timer expires.
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//!
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//! @note This function includes a workaround for Rev A. silicon, where the
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//! WDT_RSTRT register must be read back in order to function correctly.
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//!
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//! @return None.
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//
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//*****************************************************************************
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#define am_hal_wdt_restart() \
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do \
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{ \
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AM_REGn(WDT, 0, RSTRT) = AM_REG_WDT_RSTRT_RSTRT_KEYVALUE; \
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(void)AM_REGn(WDT, 0, RSTRT); \
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} \
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while(0)
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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//*****************************************************************************
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//
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// External function definitions
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//
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//*****************************************************************************
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extern void am_hal_wdt_init(am_hal_wdt_config_t *psConfig);
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extern void am_hal_wdt_start(void);
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extern void am_hal_wdt_halt(void);
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extern void am_hal_wdt_lock_and_start(void);
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extern void am_hal_wdt_int_enable(void);
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extern uint32_t am_hal_wdt_int_enable_get(void);
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extern void am_hal_wdt_int_disable(void);
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extern void am_hal_wdt_int_clear(void);
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extern void am_hal_wdt_int_set(void);
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extern uint32_t am_hal_wdt_int_status_get(bool bEnabledOnly);
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#ifdef __cplusplus
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}
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#endif
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#endif // AM_HAL_WDT_H
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//*****************************************************************************
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//
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// End Doxygen group.
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//! @}
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//
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//*****************************************************************************
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