void TIM16_IRQHandler(void)
{
 uint16_t temp=0;
 if(TIM_GetITStatus(TIM16,TIM_IT_CC1)!=RESET)
 {
  WaterCNT++;
  WaterIncrease++;
  temp=TIM16->CNT;
  if(temp>FlowLastCNT)
   WaterSpeed= 600000/(temp-FlowLastCNT);
  else
   WaterSpeed= 600000/(temp+60000-FlowLastCNT);
  FlowLastCNT=temp;
 }
 TIM_ClearITPendingBit(TIM16,TIM_IT_CC1);
}

这是072的仅供参考

/**

  * @brief  Configure the TIM IRQ Handler.
  * @param  None
  * @retval None
  */
static void TIM_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  TIM_ICInitTypeDef  TIM_ICInitStructure;  
  /* TIM2 clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

  /* GPIOB clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
  
  /* TIM2 chennel2 configuration : PB.03 */
  GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_3;
  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP ;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  
  /* Connect TIM pin to AF2 */
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource3, GPIO_AF_2);

  /* Enable the TIM2 global Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  
   /* --------------------------------------------------------------------------- 
    TIM2 configuration: PWM Input mode
     The external signal is connected to TIM2 CH2 pin (PB.03)
     TIM2 CCR2 is used to compute the frequency value 
     TIM2 CCR1 is used to compute the duty cycle value

    In this example TIM2 input clock (TIM2CLK) is set to APB1 clock (PCLK1), since
    APB1 prescaler is set to 1.
      TIM2CLK = PCLK1 = HCLK = SystemCoreClock

    External Signal Frequency = SystemCoreClock / TIM2_CCR2 in Hz.
    External Signal DutyCycle = (TIM2_CCR1*100)/(TIM2_CCR2) in %.
  Note: 
  SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f0xx.c file.
  Each time the core clock (HCLK) changes, user had to call SystemCoreClockUpdate()
  function to update SystemCoreClock variable value. Otherwise, any configuration
  based on this variable will be incorrect.
  --------------------------------------------------------------------------- */
  
  TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
  TIM_ICInitStructure.TIM_ICFilter = 0x0;

  TIM_PWMIConfig(TIM2, &TIM_ICInitStructure);

  /* Select the TIM2 Input Trigger: TI2FP2 */
  TIM_SelectInputTrigger(TIM2, TIM_TS_TI2FP2);

  /* Select the slave Mode: Reset Mode */
  TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Reset);
  TIM_SelectMasterSlaveMode(TIM2,TIM_MasterSlaveMode_Enable);

  /* TIM enable counter */
  TIM_Cmd(TIM2, ENABLE);

  /* Enable the CC2 Interrupt Request */
   TIM_ITConfig(TIM2, TIM_IT_CC2, ENABLE);
}

多谢分享！！！

1.  检查下捕获中断是否开启；

2、外部是否有可捕获的事件过来；

3. 中断方面的配置要正确

4. 启动文件正确

支持下，谢谢分享

谢谢分享！！！！

感谢分享，有需要机器人方案的可联系我，相互学习，共同进步

谢谢分享