109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/*
|
|
* File : watchdog.h
|
|
* This file is part of RT-Thread RTOS
|
|
* COPYRIGHT (C) 2012-2014, Shanghai Real-Thread Electronic Technology Co.,Ltd
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2012-09-12 heyuanjie87 first version.
|
|
* 2014-03-04 Bernard code cleanup
|
|
*/
|
|
|
|
#include <drivers/watchdog.h>
|
|
|
|
/* RT-Thread Device Interface */
|
|
|
|
/*
|
|
* This function initializes serial
|
|
*/
|
|
static rt_err_t rt_watchdog_init(struct rt_device *dev)
|
|
{
|
|
rt_watchdog_t *wtd;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
wtd = (rt_watchdog_t *)dev;
|
|
if (wtd->ops->init)
|
|
{
|
|
return (wtd->ops->init(wtd));
|
|
}
|
|
|
|
return (-RT_ENOSYS);
|
|
}
|
|
|
|
static rt_err_t rt_watchdog_open(struct rt_device *dev, rt_uint16_t oflag)
|
|
{
|
|
return (RT_EOK);
|
|
}
|
|
|
|
static rt_err_t rt_watchdog_close(struct rt_device *dev)
|
|
{
|
|
rt_watchdog_t *wtd;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
wtd = (rt_watchdog_t *)dev;
|
|
|
|
if (wtd->ops->control(wtd, RT_DEVICE_CTRL_WDT_STOP, RT_NULL) != RT_EOK)
|
|
{
|
|
rt_kprintf(" This watchdog can not be stoped\n");
|
|
|
|
return (-RT_ERROR);
|
|
}
|
|
|
|
return (RT_EOK);
|
|
}
|
|
|
|
static rt_err_t rt_watchdog_control(struct rt_device *dev,
|
|
rt_uint8_t cmd,
|
|
void *args)
|
|
{
|
|
rt_watchdog_t *wtd;
|
|
|
|
RT_ASSERT(dev != RT_NULL);
|
|
wtd = (rt_watchdog_t *)dev;
|
|
|
|
return (wtd->ops->control(wtd, cmd, args));
|
|
}
|
|
|
|
/**
|
|
* This function register a watchdog device
|
|
*/
|
|
rt_err_t rt_hw_watchdog_register(struct rt_watchdog_device *wtd,
|
|
const char *name,
|
|
rt_uint32_t flag,
|
|
void *data)
|
|
{
|
|
struct rt_device *device;
|
|
RT_ASSERT(wtd != RT_NULL);
|
|
|
|
device = &(wtd->parent);
|
|
|
|
device->type = RT_Device_Class_Miscellaneous;
|
|
device->rx_indicate = RT_NULL;
|
|
device->tx_complete = RT_NULL;
|
|
|
|
device->init = rt_watchdog_init;
|
|
device->open = rt_watchdog_open;
|
|
device->close = rt_watchdog_close;
|
|
device->read = RT_NULL;
|
|
device->write = RT_NULL;
|
|
device->control = rt_watchdog_control;
|
|
device->user_data = data;
|
|
|
|
/* register a character device */
|
|
return rt_device_register(device, name, flag);
|
|
}
|