STM32L151 使用STM32CubeMX配置时，配置定时器2复用功能ETR，不能检测到计数

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星海灿烂提问时间：2023-12-27 17:12 / 已解决

问答
是否解决:	已解决

配置如图：

实际生成代码：

/ TIM2 init function / void MX_TIM2_Init(void) {

/ USER CODE BEGIN TIM2_Init 0 /

/ USER CODE END TIM2_Init 0 /

TIM_ClockConfigTypeDef sClockSourceConfig = {0}; TIM_MasterConfigTypeDef sMasterConfig = {0};

/ USER CODE BEGIN TIM2_Init 1 /

/ USER CODE END TIM2_Init 1 / htim2.Instance = TIM2; htim2.Init.Prescaler = 0; htim2.Init.CounterMode = TIM_COUNTERMODE_UP; htim2.Init.Period = 79; htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV4; htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE; if (HAL_TIM_Base_Init(&htim2) != HAL_OK) { Error_Handler(); } sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_ETRMODE2; sClockSourceConfig.ClockPolarity = TIM_CLOCKPOLARITY_INVERTED; sClockSourceConfig.ClockPrescaler = TIM_CLOCKPRESCALER_DIV1; sClockSourceConfig.ClockFilter = 0; if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK) { Error_Handler(); } sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET; sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE; if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK) { Error_Handler(); } / USER CODE BEGIN TIM2_Init 2 /

/ USER CODE END TIM2_Init 2 /

}

void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* tim_baseHandle) {

GPIO_InitTypeDef GPIO_InitStruct = {0}; if(tim_baseHandle->Instance==TIM2) { / USER CODE BEGIN TIM2_MspInit 0 /

/ USER CODE END TIM2_MspInit 0 / / TIM2 clock enable / __HAL_RCC_TIM2_CLK_ENABLE();

__HAL_RCC_GPIOA_CLK_ENABLE(); /*TIM2 GPIO Configuration PA0-WKUP1 ------> TIM2_ETR / GPIO_InitStruct.Pin = GPIO_PIN_0; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

/ TIM2 interrupt Init / HAL_NVIC_SetPriority(TIM2_IRQn, 1, 0); HAL_NVIC_EnableIRQ(TIM2_IRQn); / USER CODE BEGIN TIM2_MspInit 1 / GPIO_InitStruct.Alternate = GPIO_AF1_TIM2; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); / USER CODE END TIM2_MspInit 1 / } }