sdk-bsp-draco/project_0/samples/c/wdt_sample.c

/* Copyright Canaan Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


#include <rtthread.h>
#include <rtdevice.h>

#ifdef RT_USING_WDT

static rt_device_t  wdt_dev = RT_NULL;

static int wdt_sample(void)
{
    rt_err_t ret = RT_EOK;
    rt_uint32_t timeout = 5;

    wdt_dev = rt_device_find("wdt0");
    if(!wdt_dev) {
        rt_kprintf("find wdt0 failed\n");
        return RT_ERROR;
    }

    ret = rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
    if(ret != RT_EOK) {
        rt_kprintf("set timeout fail\n");
        return RT_ERROR;
    }

    ret = rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
    if(ret != RT_EOK) {
        rt_kprintf("start fail\n");
        return RT_ERROR;
    }
    return ret;
}
MSH_CMD_EXPORT(wdt_sample, wdt feed);

static int wdt_feed(void)
{
    rt_err_t ret = RT_EOK;
    if(wdt_dev == RT_NULL) {
        rt_kprintf("wdt0 null\n");
    }
    else {
        ret = rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_KEEPALIVE, RT_NULL);
        if(ret != RT_EOK) {
            rt_kprintf("wdt keepalive fail\n");
        }
        else {
            rt_kprintf("keepalive\n");
        }
    }
}
MSH_CMD_EXPORT(wdt_feed, wdt test);

#endif