LL_TIM_InitTypeDef TIM_InitStruct = {0};

LL_GPIO_InitTypeDef GPIO_InitStruct = {0};

/ Peripheral clock enable / LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM3);

LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOC); /*TIM3 GPIO Configuration PC6 ------> TIM3_CH1 PC7 ------> TIM3_CH2 / GPIO_InitStruct.Pin = ENCODERA_Pin|ENCODERB_Pin; GPIO_InitStruct.Mode = LL_GPIO_MODE_FLOATING; LL_GPIO_Init(GPIOC, &GPIO_InitStruct);

/ TIM3 interrupt Init / NVIC_SetPriority(TIM3_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0)); NVIC_EnableIRQ(TIM3_IRQn);

/ USER CODE BEGIN TIM3_Init 1 /

/ USER CODE END TIM3_Init 1 / LL_TIM_SetEncoderMode(TIM3, LL_TIM_ENCODERMODE_X4_TI12); LL_TIM_IC_SetActiveInput(TIM3, LL_TIM_CHANNEL_CH1, LL_TIM_ACTIVEINPUT_DIRECTTI); LL_TIM_IC_SetPrescaler(TIM3, LL_TIM_CHANNEL_CH1, LL_TIM_ICPSC_DIV1); LL_TIM_IC_SetFilter(TIM3, LL_TIM_CHANNEL_CH1, LL_TIM_IC_FILTER_FDIV1); LL_TIM_IC_SetPolarity(TIM3, LL_TIM_CHANNEL_CH1, LL_TIM_IC_POLARITY_RISING); LL_TIM_IC_SetActiveInput(TIM3, LL_TIM_CHANNEL_CH2, LL_TIM_ACTIVEINPUT_DIRECTTI); LL_TIM_IC_SetPrescaler(TIM3, LL_TIM_CHANNEL_CH2, LL_TIM_ICPSC_DIV1); LL_TIM_IC_SetFilter(TIM3, LL_TIM_CHANNEL_CH2, LL_TIM_IC_FILTER_FDIV1); LL_TIM_IC_SetPolarity(TIM3, LL_TIM_CHANNEL_CH2, LL_TIM_IC_POLARITY_RISING); TIM_InitStruct.Prescaler = 0; TIM_InitStruct.CounterMode = LL_TIM_COUNTERMODE_UP; TIM_InitStruct.Autoreload = 65535; TIM_InitStruct.ClockDivision = LL_TIM_CLOCKDIVISION_DIV1; LL_TIM_Init(TIM3, &TIM_InitStruct); LL_TIM_DisableARRPreload(TIM3); LL_TIM_SetTriggerOutput(TIM3, LL_TIM_TRGO_RESET); LL_TIM_DisableMasterSlaveMode(TIM3); / USER CODE BEGIN TIM3_Init 2 /

/ USER CODE END TIM3_Init 2 /

}

你这个问题一定要告诉完整的型号，否则旁人无法验证。


我用STM32F103C8配置了下，TIM3 encoder脚可以选择PA6PA7
或者PB4PB5.


  /**TIM3 GPIO Configuration
  PB4   ------> TIM3_CH1
  PB5   ------> TIM3_CH2
  */
  GPIO_InitStruct.Pin = LL_GPIO_PIN_4|LL_GPIO_PIN_5;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_FLOATING;
  LL_GPIO_Init(GPIOB, &GPIO_InitStruct);


or


  /**TIM3 GPIO Configuration
  PA6   ------> TIM3_CH1
  PA7   ------> TIM3_CH2
  */
  GPIO_InitStruct.Pin = LL_GPIO_PIN_6|LL_GPIO_PIN_7;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_FLOATING;
  LL_GPIO_Init(GPIOA, &GPIO_InitStruct);

这个应该是没找到映射代码的地方吧。

使用STM32 cube mx 配置的代码，GPIO的配置一般都是在　　　MSPINIT中

void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(adcHandle->Instance==ADC1)
  {
  /* USER CODE BEGIN ADC1_MspInit 0 */

  /* USER CODE END ADC1_MspInit 0 */
    /* ADC1 clock enable */
    __HAL_RCC_ADC1_CLK_ENABLE();

    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**ADC1 GPIO Configuration
    PA6     ------> ADC1_IN6
    */
    GPIO_InitStruct.Pin = GPIO_PIN_6;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* ADC1 DMA Init */
    /* ADC1 Init */
    hdma_adc1.Instance = DMA2_Stream0;
    hdma_adc1.Init.Channel = DMA_CHANNEL_0;
    hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
    hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
    hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
    hdma_adc1.Init.Mode = DMA_CIRCULAR;
    hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;
    hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
    if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
    {
      Error_Handler();
    }

    __HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc1);

    /* ADC1 interrupt Init */
    HAL_NVIC_SetPriority(ADC_IRQn, 3, 2);
    HAL_NVIC_EnableIRQ(ADC_IRQn);
  /* USER CODE BEGIN ADC1_MspInit 1 */

  /* USER CODE END ADC1_MspInit 1 */
  }
}