WatchdogCC32XX.h

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/*
 * Copyright (c) 2015-2019, Texas Instruments Incorporated
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/*!****************************************************************************
 *  @file       WatchdogCC32XX.h
 *  @brief      Watchdog timer driver implementation for CC32XX
 *
 *  The Watchdog header file for CC32XX should be included in an application
 *  as follows:
 *  @code
 *  #include <ti/drivers/Watchdog.h>
 *  #include <ti/drivers/watchdog/WatchdogCC32XX.h>
 *  @endcode
 *
 *  Refer to @ref Watchdog.h for a complete description of APIs.
 *
 *  This Watchdog driver implementation is designed to operate on a CC32XX
 *  device. Once opened, CC32XX Watchdog will count down from the reload
 *  value specified in the WatchdogCC32XX_HWAttrs. If it times out, the
 *  Watchdog interrupt flag will be set, and a user-provided callback function
 *  will be called. If the Watchdog Timer is allowed to time out again while
 *  the interrupt flag is still pending, a reset signal will be generated.
 *  To prevent a reset, Watchdog_clear() must be called to clear the interrupt
 *  flag.
 *
 *  @warning The watchdog peripheral does not support a Non-Maskable Interrupt (NMI).
 *
 *  The reload value from which the Watchdog Timer counts down may be changed
 *  during runtime using Watchdog_setReload().
 *
 *  Watchdog_close() is <b>not</b> supported by this driver implementation.
 *
 *  By default the Watchdog driver has resets turned on. This feature cannot
 *  be disabled.
 *
 *  To have a user-defined function run at the warning interrupt, first define
 *  a void-type function that takes a Watchdog_Handle cast to a UArg as an
 *  argument. The callback and code to start the Watchdog timer are shown below.
 *
 *  @code
 *  void watchdogCallback(UArg handle);
 *
 *  ...
 *
 *  Watchdog_Handle handle;
 *  Watchdog_Params params;
 *  uint32_t tickValue;
 *
 *  Watchdog_Params_init(&params);
 *  params.callbackFxn = watchdogCallback;
 *  handle = Watchdog_open(Watchdog_configIndex, &params);
 *  // Set timeout period to 100 ms
 *  tickValue = Watchdog_convertMsToTicks(handle, 100);
 *  Watchdog_setReload(handle, tickValue);
 *
 *  ...
 *
 *  void watchdogCallback(UArg handle)
 *  {
 *      // User-defined code here
 *      ...
 *
 *  }
 *  @endcode
 *
 *  # Power Driver Usage #
 *
 *  The watchdog timer driver does not set any power constraints. If the power
 *  driver is enabled, the application will continue to aggressively attempt
 *  to place the device into the lowest power state possible.
 *
 *  When the device enters Low Power Deep Sleep, the peripheral registers are
 *  reset. After a transition from Low Power Deep Sleep, the watchdog timer will
 *  be re-initialized automatically with the most recently set reload value. If
 *  Watchdog_setReload() was never called, the
 *  #WatchdogCC32XX_HWAttrs.reloadValue is used. With each transition to and
 *  from Low Power Deep Sleep, the watchdog timer is implicitly cleared.
 *
 ******************************************************************************
 */

#ifndef ti_drivers_watchdog_WatchdogCC32XX__include
#define ti_drivers_watchdog_WatchdogCC32XX__include

#include <stdint.h>
#include <stdbool.h>
#include <ti/drivers/Watchdog.h>

#ifdef __cplusplus
extern "C" {
#endif

/* Add WatchdogCC32XX_STATUS_* macros here */

#define WatchdogCC32XX_CMD_IS_TIMER_ENABLE          (Watchdog_CMD_RESERVED + 0)


#define WatchdogCC32XX_CMD_GET_TIMER_VALUE          (Watchdog_CMD_RESERVED + 1)


#define WatchdogCC32XX_CMD_IS_TIMER_LOCKED          (Watchdog_CMD_RESERVED + 2)


#define WatchdogCC32XX_CMD_GET_TIMER_RELOAD_VALUE   (Watchdog_CMD_RESERVED + 3)


extern const Watchdog_FxnTable WatchdogCC32XX_fxnTable;

typedef struct {
    unsigned int baseAddr;       
    unsigned int intNum;         
    unsigned int intPriority;    
    uint32_t     reloadValue;    
} WatchdogCC32XX_HWAttrs;

typedef struct {
    Power_NotifyObj     notifyObj;
    /*
     * The reload value can be set at runtime; therefore we can't rely
     * on the reload value supplied in the HWAttrs after a LPDS transition.
     */
    uint32_t            reloadValue;
    Watchdog_DebugMode  debugMode;
    bool                isOpen;
} WatchdogCC32XX_Object;

#ifdef __cplusplus
}
#endif

#endif /* ti_drivers_watchdog_WatchdogCC32XX__include */