STM32F411RE定时器编码器模式，无法检测双边沿

Ossoona

• 2017-08-30

STM32F411RE定时器4编码器模式，不能双边沿检测，初始代码如下 TIM_EncoderInterfaceConfig(TIM4, TIM_EncoderMode_TI1,TIM_ICPolarity_BothEdge,TIM_ICPolarity_BothEdge); TIM_ICStructInit(&TIM_ICInitStructure);  TIM_ICInitStructure.TIM_ICFilter = 0;    TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_BothEdge; TIM_ICInit(TIM4, &TIM_ICInitStructure);  TIM_ClearFlag(TIM4, TIM_FLAG_Update);   TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);  TIM4->CNT = 0; TIM_Cmd(TIM4, ENABLE);