rt-thread-studio开发潘多拉的定时器出现问题？

发布于 2020-10-19 12:16:18 浏览：1680 订阅该版

我根据board.h中使用hwtimer的步骤使能了TIM3定时器，又在tim_config.h中define了TIM3_CONFIG
![image.png](/uploads/20201019/95a850ab5ffc87309acda74dfb8d6b01.png)
main.c中的程序用的是文档中心的例程

```c
static rt_err_t timeout_cb(rt_device_t dev, rt_size_t size)
{
    rt_kprintf("this is hwtimer timeout callback fucntion!\n");
    rt_kprintf("tick is :%d !\n", rt_tick_get());
    return 0;
}
int main(void)
{
    rt_err_t ret = RT_EOK;
    rt_hwtimerval_t timeout_s;      
    rt_device_t hw_dev = RT_NULL;  
    rt_hwtimer_mode_t mode;  
    hw_dev = rt_device_find(HWTIMER_DEV_NAME);
    if (hw_dev == RT_NULL)
    {
        rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
        return RT_ERROR;
    }
    ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
    if (ret != RT_EOK)
    {
        rt_kprintf("open %s device failed!\n", HWTIMER_DEV_NAME);
        return ret;
    }
    rt_device_set_rx_indicate(hw_dev, timeout_cb);
    mode = HWTIMER_MODE_PERIOD;
    ret = rt_device_control(hw_dev, HWTIMER_CTRL_MODE_SET, &mode);
    if (ret != RT_EOK)
    {
        rt_kprintf("set mode failed! ret is :%d\n", ret);
        return ret;
    }
    timeout_s.sec = 5;  
    timeout_s.usec = 0;  
    if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
    {
        rt_kprintf("set timeout value failed\n");
        return RT_ERROR;
    }
    rt_thread_mdelay(3500);
    rt_device_read(hw_dev, 0, &timeout_s, sizeof(timeout_s));
    rt_kprintf("Read: Sec = %d, Usec = %d\n", timeout_s.sec, timeout_s.usec);
    return ret;
    return RT_EOK;
}
```
但是运行结果是这个样子，在很长时间后才调用回调函数，不是程序中定义的5秒。
![image.png](/uploads/20201019/43525e79b872863d5735b43909090a04.png)
在keil里面运行正点原子的例程则没有问题，而且我根据以上步骤配置f103的定时器也没有问题（没有定义tim_config）。
请问这里是出现了什么问题，该如何解决？

board.h里面是这么定义的。
![image.png](/uploads/20201019/a3ea4914f007011fb8b890303c9e2982.png)
board.c添加了这个函数
```c
void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)
{
  if(htim_base->Instance==TIM3)
  {
    __HAL_RCC_TIM3_CLK_ENABLE();
    HAL_NVIC_SetPriority(TIM3_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(TIM3_IRQn);
  }
  else if(htim_base->Instance==TIM15)
  {
    __HAL_RCC_TIM15_CLK_ENABLE();
    HAL_NVIC_SetPriority(TIM1_BRK_TIM15_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(TIM1_BRK_TIM15_IRQn);
  }
}
```