STM32 TIM2定时器捕获问题

changrong

             TIM2定时器不进中断，给了PA1脉冲信号了  ，谁能帮我解决下

 

void TIM2_Int(void)
 {
    

               
               
      GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    TIM_ICInitTypeDef  TIM_ICInitStructure;
     NVIC_InitTypeDef NVIC_InitStructure;

  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 1000;  // ???for 1ms,stm32 ?72Mhz,?72??,????1000=1ms
  TIM_TimeBaseStructure.TIM_Prescaler = 72;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;    
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //?????
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

   /* Clear TIM2 update pending flag[??TIM2??????] */
   TIM_ClearFlag(TIM2, TIM_FLAG_Update);

    /* Enable TIM3 Update interrupt [TIM3??????]*/
  TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);  //????????1ms??????

  TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;       // Channel_1
  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;    //choose rising edage
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;  //Direct connecte
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;     //register every rising edages
  TIM_ICInitStructure.TIM_ICFilter = 0x03;      //used 3 period to wait for ????????

  TIM_ICInit(TIM2, &TIM_ICInitStructure);

  TIM_SelectInputTrigger(TIM2, TIM_TS_TI1FP1 );   //???????,?????1?2,?????34???????

  TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Reset);//????
  TIM_SelectMasterSlaveMode(TIM2, TIM_MasterSlaveMode_Enable); //??????????

  TIM_SetCompare1(TIM2, 0); //?????????
 /* TIM2 enable counter */
  TIM_ClearITPendingBit(TIM2, TIM_IT_Update );
  TIM_ClearITPendingBit(TIM2, TIM_IT_CC1);
  TIM_Cmd(TIM2, ENABLE);
           


   NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 4;  
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
   NVIC_Init(&NVIC_InitStructure);


      
                 
   // é?à-ê?è?
       GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
       GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
       GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
       GPIO_Init(GPIOA, &GPIO_InitStructure);
      
   

 }


 void TIM2_IRQHandler(void)
 {
   TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);
   IC2Value = TIM_GetCapture2(TIM2);
    LED1=!LED1;
 }

 

 

正点原子

请参考我们的例程，战舰板库函数版本的输入捕获实验