TIM2_CH2中断进不去

happyzn75

void TIM2_Cap_Init(u16 arr,u16 psc)
{         
        GPIO_InitTypeDef GPIO_InitStructure;
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_ICInitTypeDef  TIM2_ICInitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);        //ê1ÄüTIM2ê±Öó
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);  //ê1ÄüGPIOAê±Öó
       
        GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_1;  //PA1 Çå3y֮ǰéèÖà 
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PA1 êäèë  
        GPIO_Init(GPIOA, &GPIO_InitStructure);
        GPIO_ResetBits(GPIOA,GPIO_Pin_1);                                                 //PA1 ÏÂà-
       
        //3õê¼»ˉ¶¨ê±Æ÷2 TIM2         
        TIM_TimeBaseStructure.TIM_Period = arr; //é趨¼ÆêyÆ÷×Ô¶ˉÖØ×°Öμ
        TIM_TimeBaseStructure.TIM_Prescaler =psc;         //Ô¤·ÖÆμÆ÷   
        TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //éèÖÃê±Öó·Ö¸î:TDTS = Tck_tim
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIMÏòéϼÆêyÄ￡ê½
        TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //¸ù¾YTIM_TimeBaseInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ￥λ

        //3õê¼»ˉTIM2êäèë2¶»ñ2Îêy
          TIM2_ICInitStructure.TIM_Channel = TIM_Channel_2; //CC1S=01         Ñ¡Ôñêäèë¶Ë IC1ó3éäμ½TI1éÏ
          TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;        //éÏéyÑØ2¶»ñ
          TIM2_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //ó3éäμ½TI1éÏ
          TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;         //ÅäÖÃêäèë·ÖÆμ,2»·ÖÆμ
          TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 ÅäÖÃêäèëÂË2¨Æ÷ 2»ÂË2¨
          TIM_ICInit(TIM2, &TIM2_ICInitStructure);
       
        //ÖD¶Ï·Ö×é3õê¼»ˉ
        NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;  //TIM2ÖD¶Ï
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;  //ÏèÕ¼óÅÏ輶2¼¶
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;  //′óóÅÏ輶0¼¶
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μà±»ê1Äü
        NVIC_Init(&NVIC_InitStructure);  //¸ù¾YNVIC_InitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèNVIC¼Ä′æÆ÷
       
        TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC2,ENABLE);//ÔêDí¸üDÂÖD¶Ï ,ÔêDíCC2IE2¶»ñÖD¶Ï       
       
           TIM_Cmd(TIM2,ENABLE );         //ê1Äü¶¨ê±Æ÷2
}

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