stm32 adc中断问题

kingg209 提问时间：2013-5-20 11:11 /

用定时器3的TRGO触发ADC转换，利用ADC中断计算，配置如下，但是ADC中断进入不了。不知道什么原因，哪位给指导一下呗！谢谢。
void Init_TIMER3(void)
{
TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;   //定义一个定时器结构体变量
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);   //使能定时器3，重要！！
TIM_DeInit( TIM3);                                //将IM3定时器初始化位复位值
    TIM_BaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_BaseInitStructure.TIM_Period = 1;
    TIM_BaseInitStructure.TIM_Prescaler = 7199;
    TIM_TimeBaseInit(TIM3,&TIM_BaseInitStructure);

    TIM_SelectOutputTrigger(TIM3,TIM_TRGOSource_Update); //选择TRGO触发源为计时器更新时间

    TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
    TIM_Cmd(TIM3,ENABLE);
}
void NVIC_Configuration(void)
{
    NVIC_InitStructure.NVIC_IRQChannel = ADC1_2_IRQn;   // NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;      //响应优先级0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;         //允许中断
NVIC_Init(&NVIC_InitStructure);                         //根据指定参数初始化中断寄存器
}
void ADC1_Configuration(void)
{

/* ADC1 configuration ------------------------------------------------------*/
    ADC_InitTypeDef ADC_InitStructure;
    ADC_DeInit(ADC1);
    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_InitStructure.ADC_NbrOfChannel = M;
    ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
    ADC_InitStructure.ADC_ScanConvMode = ENABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T3_TRGO;
    ADC_InitStructure.ADC_DataAlign =ADC_DataAlign_Right;
    ADC_Init(ADC1,&ADC_InitStructure);
ADC_ExternalTrigConvCmd(ADC1,ENABLE);
ADC_ITConfig(ADC1,ADC_IT_EOC,ENABLE);
}
void ADC1_2_IRQnHandler(void)
{
   while (ADC_GetITStatus(ADC1,ADC_IT_EOC)==RESET)
   {
      ADC_ClearITPendingBit(ADC1,ADC_IT_EOC);    // ADC_GetConversionValue(ADC1);
      if(Status)
  {
   TEST1=1;
   TEST2=1;
   Status=0;
  }
  else
  {
   TEST1=0;
   TEST2=0;
   Status=1;
  }

    }
}