[DeviceDrivers] Add watchdog driver frame work

This commit is contained in:
bernard 2014-03-04 14:32:56 +08:00
parent 020e95d91b
commit 306e1ac43f
4 changed files with 176 additions and 0 deletions

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@ -0,0 +1,56 @@
/*
* 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.
*/
#ifndef __WATCHDOG_H__
#define __WATCHDOG_H__
#include <rtthread.h>
#define RT_DEVICE_CTRL_WDT_GET_TIMEOUT (1) /* get timeout(in seconds) */
#define RT_DEVICE_CTRL_WDT_SET_TIMEOUT (2) /* set timeout(in seconds) */
#define RT_DEVICE_CTRL_WDT_GET_TIMELEFT (3) /* get the left time before reboot(in seconds) */
#define RT_DEVICE_CTRL_WDT_KEEPALIVE (4) /* refresh watchdog */
#define RT_DEVICE_CTRL_WDT_START (5) /* start watchdog */
#define RT_DEVICE_CTRL_WDT_STOP (6) /* stop watchdog */
struct rt_watchdog_ops;
struct rt_watchdog_device
{
struct rt_device parent;
struct rt_watchdog_ops *ops;
};
typedef struct rt_watchdog_device rt_watchdog_t;
struct rt_watchdog_ops
{
rt_err_t (*init)(rt_watchdog_t *wdt);
rt_err_t (*control)(rt_watchdog_t *wdt, int cmd, void *arg);
};
rt_err_t rt_hw_watchdog_register(rt_watchdog_t *wdt,
const char *name,
rt_uint32_t flag,
void *data);
#endif /* __WATCHDOG_H__ */

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@ -320,5 +320,9 @@ void rt_data_queue_reset(struct rt_data_queue *queue);
#include "drivers/sdio.h"
#endif
#ifdef RT_USING_WDT
#include "drivers/watchdog.h"
#endif
#endif /* __RT_DEVICE_H__ */

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from building import *
cwd = GetCurrentDir()
src = Glob('*.c')
CPPPATH = [cwd + '/../include']
group = DefineGroup('DeviceDrivers', src, depend = ['RT_USING_WDT'], CPPPATH = CPPPATH)
Return('group')

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/*
* 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);
}