rt-thread/bsp/imx6sx/iMX6_Platform_SDK/sdk/drivers/wdog/watchdog.h

/*
 * Copyright (c) 2012, Freescale Semiconductor, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 *
 * o Redistributions in binary form must reproduce the above copyright notice, this
 *   list of conditions and the following disclaimer in the documentation and/or
 *   other materials provided with the distribution.
 *
 * o Neither the name of Freescale Semiconductor, Inc. nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef __WATCHDOG__
#define __WATCHDOG__

#include "sdk.h"

typedef struct {
    volatile uint16_t wcr;      /* control */
    volatile uint16_t wsr;      /* service */
    volatile uint16_t wrsr;     /* reset status */
    volatile uint16_t wicr;     /* interrupt control */
    volatile uint16_t wmcr;     /* misc control */
} watchdog_reg_t, *watchdog_reg_p;

#define WCR_WDE  0x0004         /* write once */
#define WCR_WDT  0x0008         /* write once */
#define WCR_SRS  0x0010         /* software reset */
#define WCR_WDA  0x0020         /* assert output */
#define WCR_WDBG 0x0002         /* suspend time while in debug mode */
#define WCR_WT   0x0300         /* 2 seconds */

/* Timeout = (wt + 1) / 2 */

#endif