进不去中断，一直都在跑死循环

1万 · 2013-7-31 20:13

void time_Init()
{
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
//TIM_OCInitTypeDef    TIM_OCInitStrcture;
NVIC_InitTypeDef    NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
TIM_DeInit(TIM2);
TIM_InternalClockConfig(TIM2);

TIM_TimeBaseStructure.TIM_Prescaler=35999;  //
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //
TIM_TimeBaseStructure.TIM_Period=2000; //
//如果APB1的时钟分频数不为1，那么TIM2~7的时钟频率将为APB1时钟的两倍。
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);

TIM_Cmd(TIM2,ENABLE);

NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;//使能按键外部中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;  //抢占优先级2，
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;    //子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
NVIC_Init(&NVIC_InitStructure);

TIM_PrescalerConfig(TIM2,35999,TIM_PSCReloadMode_Immediate);
TIM_ClearFlag(TIM2, TIM_FLAG_Update);

TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);
}
有没有人有空，帮我看看这个定时中断，怎么进不去中断，那里设置错误？一直都在跑死循环的