RTC_TimeTypeDef GetRTCTime;
void RTC_Initializes(void)
{
  RTC_InitTypeDef RTC_InitStructure;
  RTC_DateTimeTypeDef RTC_DateTimeStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
  RCC_LSICmd(ENABLE);
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);//ÄÚ²¿
RCC_RTCCLKCmd(ENABLE);

  PWR_BackupAccessCmd(ENABLE);                   //????RTC

  RTC_WaitForSynchro();  
  if(RTC_ReadBackupRegister(RTC_BKP_DR0) != RTC_FLAG_BKP)
  {
    RTC_Configuration();                         //??RTC
    RTC_InitStructure.RTC_AsynchPrediv = AsynchPrediv;
    RTC_InitStructure.RTC_SynchPrediv = SynchPrediv;
    RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
    if(RTC_Init(&RTC_InitStructure) == ERROR)
    {
      while(1);                                  //?????
    }
    RTC_DateTimeStructure.Year = 16;
    RTC_DateTimeStructure.Month = 6;
    RTC_DateTimeStructure.Date = 5;
    RTC_DateTimeStructure.Week = 7;
    RTC_DateTimeStructure.Hour = 10;
    RTC_DateTimeStructure.Minute = 0;
    RTC_DateTimeStructure.Second = 0;
    RTC_SetDateTime(RTC_DateTimeStructure);      //?????RTC(2016?6?5? ?? 12:00:00)
    RTC_WriteBackupRegister(RTC_BKP_DR0, RTC_FLAG_BKP);
  
  //if(ON)ON=1;//?????????
  }
  else
  {
#ifdef RTC_CLOCK_SOURCE_LSI
    RCC_LSICmd(ENABLE);//????
#endif
    RTC_WaitForSynchro();                        //??RTC?RTC_APB????
  }
}




void RTC_AlarmConfig(void)
{
RTC_TimeTypeDef   RTC_TimeStructure;
  RTC_AlarmTypeDef  RTC_AlarmStructure;
  EXTI_InitTypeDef EXTI_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
PWR_BackupAccessCmd(ENABLE);   

RCC_LSICmd(ENABLE);
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);//ÄÚ²¿
RCC_RTCCLKCmd(ENABLE);
  RTC_AlarmCmd(RTC_Alarm_A,DISABLE);//¹Ø±ÕÄÖÖÓA
  /* Get current time */
  RTC_GetTime(RTC_Format_BIN, &RTC_TimeStructure);

RTC_AlarmStructure.RTC_AlarmTime.RTC_H12=RTC_H12_AM;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours=RTC_TimeStructure.RTC_Hours;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes=RTC_TimeStructure.RTC_Minutes;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds=RTC_TimeStructure.RTC_Seconds+5;
if(RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds == 60)RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds=0;

//
//  RTC_AlarmStructure.RTC_AlarmDateWeekDay=0x31;
// RTC_AlarmStructure.RTC_AlarmDateWeekDaySel=0x00;
// RTC_AlarmStructure.RTC_AlarmMask=0x00;
// RTC_AlarmStructure.RTC_AlarmTime.RTC_H12=RTC_H12_AM;
//
//
//  RTC_SetAlarm(RTC_Format_BIN,RTC_Alarm_A,&RTC_AlarmStructure);

  RTC_AlarmStructure.RTC_AlarmDateWeekDay = 0x31;
  RTC_AlarmStructure.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date;
  RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_DateWeekDay | RTC_AlarmMask_Minutes |
                                     RTC_AlarmMask_Hours;
//  RTC_AlarmStructure.RTC_AlarmTime=RTC_TimeTypeInitStructure;
  RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);

   /* Clear the Alarm A Pending Bit */
  RTC_ClearITPendingBit(RTC_IT_ALRA);  
//Êä³öÉ趨µÄÄÖÖÓ»½ÐÑʱ¼ä

//  RTC_ITConfig(RTC_IT_ALRA, ENABLE);
RTC_ITConfig(RTC_IT_ALRA, ENABLE);  
  /* Enable the alarm */
  RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
  

   /* EXTI configuration */
  EXTI_ClearITPendingBit(EXTI_Line17);
  EXTI_InitStructure.EXTI_Line = EXTI_Line17;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);
  
  /* Enable the RTC Alarm Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority=1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
//PWR_BackupAccessCmd(DISABLE);
}


void  RTC_IRQHandler(void)
{
  RTC_TimeTypeDef   RTC_TimeStructure;
  RTC_AlarmTypeDef  RTC_AlarmStructure;
  SystemInit();
// RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
// PWR_BackupAccessCmd(ENABLE);   
//   RCC_LSICmd(ENABLE);
// RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);//ÄÚ²¿
// RCC_RTCCLKCmd(ENABLE);
   if (RTC_GetITStatus(RTC_IT_ALRA) != RESET)
   {
   
RTC_GetTime(RTC_Format_BIN, &RTC_TimeStructure);

RTC_AlarmStructure.RTC_AlarmTime.RTC_H12=RTC_H12_AM;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours=RTC_TimeStructure.RTC_Hours;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes=RTC_TimeStructure.RTC_Minutes;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds=RTC_TimeStructure.RTC_Seconds+5;
if(RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds == 60)RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds=0;
    RTC_AlarmStructure.RTC_AlarmDateWeekDay = 0x31;
  RTC_AlarmStructure.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date;
  RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_DateWeekDay | RTC_AlarmMask_Minutes |
                                     RTC_AlarmMask_Hours;
  RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);  
   
   RTC_ClearITPendingBit(RTC_IT_ALRA);        
   }  
   EXTI_ClearITPendingBit(EXTI_Line17);   
//PWR_BackupAccessCmd(DISABLE);
}
进去一次后程序就停在了这里：

没有汉语注释也不好猜，中断标志清除了吗？