Rtthread学习笔记（十三）RT-Thread Studio开启硬件看门狗Watchdog_rt thread 硬件看门狗

一、开启硬件看门狗Watchdog

1、配置RT-Thread Settings

2、开启stm32f1xx_hal_conf.h中的宏定义

3.使用RT接口函数初始化硬件看门狗

#define WDT_DEVICE_NAME    "wdt"    /* 看门狗设备名称 */

static rt_device_t wdg_dev;         /* 看门狗设备句柄 */

static void idle_hook(void)
{
    /* 在空闲线程的回调函数里喂狗 */
    rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_KEEPALIVE, NULL);
    rt_kprintf("feed the dog!\n ");//正式使用时去掉
}

int wdt_sample(void)
{
    rt_err_t ret = RT_EOK;
    rt_uint32_t timeout = 1;        /* 溢出时间，单位：秒 */
    char device_name[RT_NAME_MAX]=WDT_DEVICE_NAME;

    /* 根据设备名称查找看门狗设备，获取设备句柄 */
    wdg_dev = rt_device_find(device_name);
    if (!wdg_dev)
    {
        rt_kprintf("find %s failed!\n", device_name);
        return RT_ERROR;
    }
    /* 初始化设备 */
    ret = rt_device_init(wdg_dev);
    if (ret != RT_EOK)
    {
        rt_kprintf("initialize %s failed!\n", device_name);
        return RT_ERROR;
    }
    /* 设置看门狗溢出时间 */
    ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
    if (ret != RT_EOK)
    {
        rt_kprintf("set %s timeout failed!\n", device_name);
        return RT_ERROR;
    }
    /* 启动看门狗 */
    ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
    if (ret != RT_EOK)
    {
        rt_kprintf("start %s failed!\n", device_name);
        return -RT_ERROR;
    }
    /* 设置空闲线程回调函数 */
    rt_thread_idle_sethook(idle_hook);

    return ret;
}
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