MSH运行hwtimer_test后把idle线程kill了？

发布于 2021-10-28 17:14:28 浏览：775 订阅该版

求助一下，我在调试社区代码里面的hwtimer_test时，遇到了一个很奇怪的问题：

进入MSH后，首次运行hwtimer_test时正常的，用例中的rt_thread_delay能够正常的delay延迟。但是当我第二次运行时，发现rt_thread_delay不能延时了。后面通过debug发现，在系统刚启动时查看list_thread状态，显示由tshell和idle线程，其中tshell是running状态，idle为ready状态，是正常的。在运行一次hwtimer命令后，再去查看list_thread发现idle线程状态有异常，idle被close掉了，并且线程的name也变化了。怀疑是踩内存了。但是目前我对这个问题没有了进一步的思路，发出来大家看下有没有什么思路能够提供给我的。。。下图是log

![image.png](https://oss-club.rt-thread.org/uploads/20211028/74d2b43c1d2d1728505b99db776212e3.png)

hwtimer_test代码如下：

```c
rt-thread/examples/test/hwtimer_test.c
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/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 */

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

#ifdef RT_USING_HWTIMER

#define TIMER   "timer0"

static rt_err_t timer_timeout_cb(rt_device_t dev, rt_size_t size)
{
    rt_kprintf("enter hardware timer isr\n");

return 0;
}

int hwtimer(void)
{
    rt_err_t err;
    rt_hwtimerval_t val;
    rt_device_t dev = RT_NULL;
    rt_tick_t tick;
    rt_hwtimer_mode_t mode;
    int freq = 10000;
    int t = 5;

if ((dev = rt_device_find(TIMER)) == RT_NULL)
    {
        rt_kprintf("No Device: %s\n", TIMER);
        return -1;
    }

if (rt_device_open(dev, RT_DEVICE_OFLAG_RDWR) != RT_EOK)
    {
        rt_kprintf("Open %s Fail\n", TIMER);
        return -1;
    }

/* 时间测量 */
    /* 计数时钟设置(默认1Mhz或支持的最小计数频率) */
    err = rt_device_control(dev, HWTIMER_CTRL_FREQ_SET, &freq);
    if (err != RT_EOK)
    {
        rt_kprintf("Set Freq=%dhz Fail\n", freq);
        goto EXIT;
    }

/* 周期模式 */
    mode = HWTIMER_MODE_PERIOD;
    err = rt_device_control(dev, HWTIMER_CTRL_MODE_SET, &mode);

tick = rt_tick_get();
    rt_kprintf("Start Timer> Tick: %d\n", tick);
    /* 设置定时器超时值并启动定时器 */
    val.sec = t;
    val.usec = 0;
    rt_kprintf("SetTime: Sec %d, Usec %d\n", val.sec, val.usec);
    if (rt_device_write(dev, 0, &val, sizeof(val)) != sizeof(val))
    {
        rt_kprintf("SetTime Fail\n");
        goto EXIT;
    }
    rt_kprintf("Sleep %d sec\n", t);
    rt_thread_delay(t*RT_TICK_PER_SECOND);

/* 停止定时器 */
    err = rt_device_control(dev, HWTIMER_CTRL_STOP, RT_NULL);
    rt_kprintf("Timer Stoped\n");
    /* 读取计数 */
    rt_device_read(dev, 0, &val, sizeof(val));
    rt_kprintf("Read: Sec = %d, Usec = %d\n", val.sec, val.usec);

/* 定时执行回调函数 -- 单次模式 */
    /* 设置超时回调函数 */
    rt_device_set_rx_indicate(dev, timer_timeout_cb);

/* 单次模式 */
    mode = HWTIMER_MODE_PERIOD;
    err = rt_device_control(dev, HWTIMER_CTRL_MODE_SET, &mode);

/* 设置定时器超时值并启动定时器 */
    val.sec = t;
    val.usec = 0;
    rt_kprintf("SetTime: Sec %d, Usec %d\n", val.sec, val.usec);
    if (rt_device_write(dev, 0, &val, sizeof(val)) != sizeof(val))
    {
        rt_kprintf("SetTime Fail\n");
        goto EXIT;
    }

/* 等待回调函数执行 */
    rt_thread_delay((t + 1)*RT_TICK_PER_SECOND);

EXIT:
    err = rt_device_close(dev);
    rt_kprintf("Close %s\n", TIMER);

return err;
}
#ifdef RT_USING_FINSH
MSH_CMD_EXPORT(hwtimer, "Test hardware timer");
#endif
#endif /* RT_USING_HWTIMER */
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```