调用定时器初始化出现死机问题

发布于 2021-03-01 16:38:45 浏览：1317 订阅该版

```c
void GAS1_Init()
{
	 TIM_MasterConfigTypeDef sMasterConfig = {0};
	  TIM_IC_InitTypeDef sConfigIC = {0};

htim5.Instance = TIM5;
	  htim5.Init.Prescaler = 2;
	  htim5.Init.CounterMode = TIM_COUNTERMODE_UP;
	  htim5.Init.Period = 0xffff;
	  htim5.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
	  htim5.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
	  if (HAL_TIM_IC_Init(&htim5) != HAL_OK)
	  {
	    Error_Handler();
	  }
	  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
	  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
	  if (HAL_TIMEx_MasterConfigSynchronization(&htim5, &sMasterConfig) != HAL_OK)
	  {
	    Error_Handler();
	  }
	  sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
	  sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
	  sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
	  sConfigIC.ICFilter = 0;
	  if (HAL_TIM_IC_ConfigChannel(&htim5, &sConfigIC, TIM_CHANNEL_2) != HAL_OK)
	  {
	    Error_Handler();
	  }
** //HAL_TIM_IC_Start_IT(&htim5, TIM_CHANNEL_2);**

}
```
初始化时，只要一调用`HAL_TIM_IC_Start_IT();`就会出现死机，此函数只要是用于输入捕获初始化，
1.怀疑是定时器中断与系统滴答定时器中断优先级冲突，修改优先级后不行，
2.把线程里边所有的延时函数都注销掉，不行