无法从编码器模式下的 TIM1 获取计数值

patch1582 提问时间：2026-5-16 20:27 / 未解决

问答
是否解决:	未解决

我用 STM32F407开发板，将一个带编码器的 Zaber 位移台连接到该单片机。断开连接时，我可以测量到 A、B 相信号从 GND 切换到 5V。我已经查看过信号，正交输出正常，且不需要上下拉电阻。我将信号连接到引脚 PE9 和 PE11，并把 TIM1 设置为编码器模式。

TIM1 初始化函数如下：

static void MX_TIM1_Init(void) { / USER CODE BEGIN TIM1_Init 0 /

/ USER CODE END TIM1_Init 0 /

TIM_Encoder_InitTypeDef sConfig = {0}; TIM_MasterConfigTypeDef sMasterConfig = {0};

/ USER CODE BEGIN TIM1_Init 1 /

/ USER CODE END TIM1_Init 1 /

htim1.Instance = TIM1; htim1.Init.Prescaler = 0; htim1.Init.CounterMode = TIM_COUNTERMODE_UP; htim1.Init.Period = 65535; htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; htim1.Init.RepetitionCounter = 0; htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE; sConfig.EncoderMode = TIM_ENCODERMODE_TI1; sConfig.IC1Polarity = TIM_ICPOLARITY_RISING; sConfig.IC1Selection = TIM_ICSELECTION_DIRECTTI; sConfig.IC1Prescaler = TIM_ICPSC_DIV1; sConfig.IC1Filter = 10; sConfig.IC2Polarity = TIM_ICPOLARITY_RISING; sConfig.IC2Selection = TIM_ICSELECTION_DIRECTTI; sConfig.IC2Prescaler = TIM_ICPSC_DIV1; sConfig.IC2Filter = 0; if (HAL_TIM_Encoder_Init(&htim1, &sConfig) != HAL_OK) { Error_Handler(); } sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET; sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE; if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK) { Error_Handler(); } } 但是，旋转编码器时，TIM1->CNT 始终保持为 0。请教