定时器问题：下面我是改的把TIM3改成TIM2，请大佬帮忙看看怎么不对

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void TIM2_Int_Init(u16 arr,u16 psc)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        NVIC_InitTypeDef NVIC_InitStructure;

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //ê±Öóê1Äü

        TIM_TimeBaseStructure.TIM_Period = arr; //éèÖÃÔúÏÂò»¸ö¸üDÂê¼t×°èë»î¶ˉμÄ×Ô¶ˉÖØ×°ÔؼÄ′æÆ÷ÖüÆúμÄÖμ         ¼Æêyμ½5000Îa500ms
        TIM_TimeBaseStructure.TIM_Prescaler =psc; //éèÖÃóÃà′×÷ÎaTIMxê±ÖóÆμÂê3yêyμÄÔ¤·ÖÆμÖμ  10KhzμļÆêyÆμÂê  
        TIM_TimeBaseStructure.TIM_ClockDivision = 0; //éèÖÃê±Öó·Ö¸î:TDTS = Tck_tim
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIMÏòéϼÆêyÄ￡ê½
        TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //¸ù¾YTIM_TimeBaseInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ￥λ

        TIM_ITConfig(  //ê1Äü»òÕßê§ÄüÖ¸¶¨μÄTIMÖD¶Ï
                TIM2, //TIM2
                TIM_IT_Update ,
                ENABLE  //ê1Äü
                );
        NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;  //TIM3ÖD¶Ï
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  //ÏèÕ¼óÅÏ輶0¼¶
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  //′óóÅÏ輶3¼¶
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μà±»ê1Äü
        NVIC_Init(&NVIC_InitStructure);  //¸ù¾YNVIC_InitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèNVIC¼Ä′æÆ÷

        TIM_Cmd(TIM2, ENABLE);  //ê1ÄüTIMxíaéè
                                                         
}

void TIM2_IRQHandler(void)   //TIM3ÖD¶Ï
{
        if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) //¼ì2éÖ¸¶¨μÄTIMÖD¶Ï·￠éúóë·ñ:TIM ÖD¶ÏÔ′
                {
                TIM_ClearITPendingBit(TIM2, TIM_IT_Update );  //Çå3yTIMxμÄÖD¶Ï′y′|àíλ:TIM ÖD¶ÏÔ′
                LED1=0;
                }
}

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注释请忽略

13372533333

没改全吧， TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);这句还要改下的