参照网上大神们写的增量式编码器，测量脉冲一直变
void Encoder_Init(void)
{
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_ICInitTypeDef TIM_ICInitStructure;

/* Encoder unit connected to TIM3, 4X mode */   
  GPIO_InitTypeDef GPIO_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

  /* TIM3 clock source enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
  /* Enable GPIOA, clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

  GPIO_StructInit(&GPIO_InitStructure);
  /* Configure PA.06,07 as encoder input */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Enable the TIM3 Update Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = TIMx_PRE_EMPTION_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = TIMx_SUB_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  /* Timer configuration in Encoder mode */
  TIM_DeInit(TIM3);
  TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);

  TIM_TimeBaseStructure.TIM_Prescaler = 0x0;  // No prescaling
  TIM_TimeBaseStructure.TIM_Period = (4*ENCODER_PPR)-1;  
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;   
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  TIM_EncoderInterfaceConfig(TIM3, TIM_EncoderMode_TI12,TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);
  TIM_ICStructInit(&TIM_ICInitStructure);
  TIM_ICInitStructure.TIM_ICFilter = ICx_FILTER;
  TIM_ICInit(TIM3, &TIM_ICInitStructure);

// Clear all pending interrupts
  TIM_ClearFlag(TIM3, TIM_FLAG_Update);
  TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);
  //Reset counter
  TIM3->CNT = COUNTER_RESET;

  //ENC_Clear_Speed_Buffer();

  TIM_Cmd(TIM3, ENABLE);  
}


void TIM3_IRQHandler(void)
{  
        /* Clear the interrupt pending flag */
        TIM_ClearFlag(TIM3, TIM_FLAG_Update);
        if (hEncoder_Timer_Overflow != U16_MAX)  
        {
                hEncoder_Timer_Overflow++;
        }
}


int main(void)
{       
        SystemInit();
        delay_init();                     //延时函数初始化       
        NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);// 设置中断优先级分组2
        uart_init(9600);         //串口初始化为9600
        TIM1_PWM_Init1(799,0);
        LED_Init();
        ADCInit();       
        Encoder_Init(); //PA6 PA7
        while(1)
        {
                //Old_Count = Count;                                                                        //获取先前的计数值
                Count = TIM_GetCounter(TIM3);                                                        //获取编码器当前数值
            printf("数值 = %d ",Count);                                                                //串口打印数值       
                Judge();   //转动电机
                delay_ms(500);
        }         
}

我用的是16线的霍尔传感器（https://item.taobao.com/item.htm ... amp;_u=h1lt4msm250f），电机匀速转动3s，每次测得的脉冲值都变化很大。图片中每次数值变化都是因为电机转了3s。为什么网上别的宝宝都能调试成功，就我不行