stm32编码器模式3采1200ppr的编码器转一圈为啥是计数器是2400不是4800?还有编码器上的1200ppr是指A B相各1200还是说AB加起来一共1200个脉冲？

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); /GPIO???/ GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure);

TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure; TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1; //????,?????,????????????,????????? TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInitStructure.TIM_Period = 40000-1; TIM_TimeBaseInitStructure.TIM_Prescaler = 1; TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStructure);

/???????/ TIM_ICInitTypeDef TIM_ICInitStructure;
TIM_ICStructInit(&TIM_ICInitStructure); //??????,?????????? //????????,??????????????? //????????????? TIM_ICInitStructure.TIM_Channel = TIM_Channel_1; //?????????1 TIM_ICInitStructure.TIM_ICFilter = 0xF; //???????,???????? TIM_ICInit(TIM3, &TIM_ICInitStructure); //????????TIM_ICInit,??TIM3??????? TIM_ICInitStructure.TIM_Channel = TIM_Channel_2; //?????????2 TIM_ICInitStructure.TIM_ICFilter = 0xF; //???????,???????? TIM_ICInit(TIM3, &TIM_ICInitStructure);

TIM_EncoderInterfaceConfig(TIM3, TIM_EncoderMode_TI1, TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);

/TIM??/ TIM_Cmd(TIM3, ENABLE); //??TIM3,???????

我看你的配置，时基参数那里有了2分频哦，如果不分频的话，这个地方应该是0.


TIM_TimeBaseInitStructure.TIM_Prescaler = 1;