/*******************************************************************************************************************
 *File Name   : watchdog.h
 *Description : the file is driver for watchdog
 *Date          : 2008/06/16
 *Author       : yuanguiyou
 --History:
 ------------------------------------------------------------------------------------------------------------------
 *change info:
 
 *******************************************************************************************************************/
#ifndef WATCHDOG_H
#define WATCHDOG_H

#include "drvbase.h"
/*!
 * \brief Start the watch dog timer.
 *
 * This function can be used by applications to prevent hang-ups.
 *
 * \param ms    Watch dog time out in milliseconds.
 * \return The actual time out value, which may differ from the
 *         specified value due to hardware limitations. The watch
 *         dog timer will be automatically enabled on return.
 */
u32 WatchDogStart(u32 ms);

/*Restart the watch dog timer.*/
void WatchDogRestart(void);

/*Disables the watch dog timer.*/
void WatchDogDisable(void);

/*!
 * \brief Enables the watch dog timer.
 *
 * The function can be safely used within nested subroutines.
 * The watch dog will be enabled only, if this function is called
 * the same number of times as WatchDogDisable(). If enabled,
 * the watch dog timer will also have been re-started and the
 * full time out value is available before another WatchDogRestart()
 * is required.
 *
 * If the watch has not been started by WatchDogStart(), then this
 * function does nothing.
 */
void WatchDogEnable(void);

#endif