在没有使用   TIM_Cmd(TIM2, ENABLE); 使能定时器的时候，stm32会进一次中断吗？

打印如下：
_____MY_TIMERINIT
_____TIM2_IRQHandler


代码如下：//这是定时器初始化的函数
void MY_TIMERINIT(int arr,int psc)
{
        TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
        NVIC_InitTypeDef  NVIC_InitStruct;
        printf("\r\n_____%s\r\n",__func__);
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
        TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
        TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
        TIM_TimeBaseInitStruct.TIM_Period = arr;
        TIM_TimeBaseInitStruct.TIM_Prescaler = psc;
        TIM_TimeBaseInit( TIM2, &TIM_TimeBaseInitStruct);
        TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
        NVIC_InitStruct.NVIC_IRQChannel = TIM2_IRQn;
        NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
        NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 1 ;
        NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1;
        NVIC_Init(&NVIC_InitStruct);
}

//这是定时器中断的函数
void TIM2_IRQHandler(void)
{
  printf("\r\n_____%s\r\n",__func__);
        if(TIM_GetITStatus(TIM2, TIM_IT_Update)!=RESET)
        {
        }
}

你按这样顺序安排代码验证下：
TIM_ClearITPendingBit(TIM1, TIM_IT_Update); //清除更新中断请求位
TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE); //使能定时器1更新中断
TIM_Cmd(TIM1, ENABLE); //启动定时器

http://mp.weixin.qq.com/s?__biz=MzA3OTIxMjQyNQ==&mid=205748433&idx=1&sn=e86e3a12d93d702878657eeb2d655020#rd

楼上说的对，把中断程序往前面写