要使用TIM3_CH2通道的输入捕获，但是只留了PB5管脚，想要重映射至PB5，但是没有找到相关配置函数，因此想问下有没有方法重映射至PB5管脚

具体型号是L!51CBt6

这个在STM32CubeMX配置很方便呀：

1. void HAL_TIM_IC_MspInit(TIM_HandleTypeDef* htim_ic)
   
2. {
   
3. 
   
4.   GPIO_InitTypeDef GPIO_InitStruct;
   
5.   if(htim_ic->Instance==TIM3)
   
6.   {
   
7.   /* USER CODE BEGIN TIM3_MspInit 0 */
   
8. 
   
9.   /* USER CODE END TIM3_MspInit 0 */
   
10.     /* Peripheral clock enable */
    
11.     __HAL_RCC_TIM3_CLK_ENABLE();
    
12.   
    
13.     /**TIM3 GPIO Configuration   
    
14.     PB5     ------> TIM3_CH2
    
15.     */
    
16.     GPIO_InitStruct.Pin = GPIO_PIN_5;
    
17.     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    
18.     GPIO_InitStruct.Pull = GPIO_NOPULL;
    
19.     GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    
20.     GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
    
21.     HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
    
22. 
    
23.   /* USER CODE BEGIN TIM3_MspInit 1 */
    
24. 
    
25.   /* USER CODE END TIM3_MspInit 1 */
    
26.   }
    
27. 
    
28. }
    
29. 
    
30. /* TIM3 init function */
    
31. static void MX_TIM3_Init(void)
    
32. {
    
33. 
    
34.   TIM_MasterConfigTypeDef sMasterConfig;
    
35.   TIM_IC_InitTypeDef sConfigIC;
    
36. 
    
37.   htim3.Instance = TIM3;
    
38.   htim3.Init.Prescaler = 0;
    
39.   htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
    
40.   htim3.Init.Period = 0;
    
41.   htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    
42.   if (HAL_TIM_IC_Init(&htim3) != HAL_OK)
    
43.   {
    
44.     _Error_Handler(__FILE__, __LINE__);
    
45.   }
    
46. 
    
47.   sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    
48.   sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    
49.   if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
    
50.   {
    
51.     _Error_Handler(__FILE__, __LINE__);
    
52.   }
    
53. 
    
54.   sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
    
55.   sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
    
56.   sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
    
57.   sConfigIC.ICFilter = 0;
    
58.   if (HAL_TIM_IC_ConfigChannel(&htim3, &sConfigIC, TIM_CHANNEL_2) != HAL_OK)
    
59.   {
    
60.     _Error_Handler(__FILE__, __LINE__);
    
61.   }
    
62. 
    
63. }
    
64. 
    
65. 
    

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