rt_timer_create一用就死机了

发布于 2022-02-11 13:08:30 浏览：1096 订阅该版

5 个回答

yangjie 认证专家 2022-02-11

hello

imwhisky 2022-02-11

whisky

imwhisky 2022-02-11

whisky

yangjie 2022-02-11

hello

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aozima 2022-02-11

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

crystal266 2022-02-11

嵌入式

不要在中断里面进行定时器的创建，因为创建定时器会申请空间，占用锁。正确的方法是在外面进行定时器的创建，中断可以进行定时器的启动和停止，另外定时器创建一次就行，不用频繁的创建和删除。如果想知道定时器的状态可以使用 rt_timer_control 函数，cmd 传入 RT_TIMER_CTRL_GET_STATE 即可。

```
/**
 * @brief This function will get or set some options of the timer
 *
 * @param timer the timer to be get or set
 * @param cmd the control command
 * @param arg the argument
 *
 * @return the statu of control
 */
rt_err_t rt_timer_control(rt_timer_t timer, int cmd, void *arg)
{
    register rt_base_t level;

/* timer check */
    RT_ASSERT(timer != RT_NULL);
    RT_ASSERT(rt_object_get_type(&timer->parent) == RT_Object_Class_Timer);

level = rt_hw_interrupt_disable();
    switch (cmd)
    {
    case RT_TIMER_CTRL_GET_TIME:
        *(rt_tick_t *)arg = timer->init_tick;
        break;

case RT_TIMER_CTRL_SET_TIME:
        timer->init_tick = *(rt_tick_t *)arg;
        break;

case RT_TIMER_CTRL_SET_ONESHOT:
        timer->parent.flag &= ~RT_TIMER_FLAG_PERIODIC;
        break;

case RT_TIMER_CTRL_SET_PERIODIC:
        timer->parent.flag |= RT_TIMER_FLAG_PERIODIC;
        break;

case RT_TIMER_CTRL_GET_STATE:
        if(timer->parent.flag & RT_TIMER_FLAG_ACTIVATED)
        {
            /*timer is start and run*/
            *(rt_tick_t *)arg = RT_TIMER_FLAG_ACTIVATED;
        }
        else
        {
            /*timer is stop*/
            *(rt_tick_t *)arg = RT_TIMER_FLAG_DEACTIVATED;
        }
        break;

default:
        break;
    }
    rt_hw_interrupt_enable(level);

return RT_EOK;
}
RTM_EXPORT(rt_timer_control);
```