stm32l151c8t6rtcalarma定时唤醒

RTC_InitTypeDef RTC_InitStructure;
RTC_TimeTypeDef RTC_TimeStructure; 
RTC_AlarmTypeDef RTC_AlarmStructure;
EXTI_InitTypeDef EXTI_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR,ENABLE);
  PWR_RTCAccessCmd(ENABLE);//Enables or disables access to the RTC and backup registers.
  RCC_RTCResetCmd(ENABLE);
  RCC_RTCResetCmd(DISABLE);
 RCC_LSICmd(ENABLE);
 while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
    {
    }
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
RCC_RTCCLKCmd(ENABLE);
RTC_WaitForSynchro();//Waits until the RTC Time and Date registers (RTC_TR and RTC_DR) are synchronized with RTC APB clock.
  /* Calendar Configuration */
  RTC_InitStructure.RTC_AsynchPrediv = 0x7F;
  RTC_InitStructure.RTC_SynchPrediv =  0xFF;
  RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
  RTC_Init(&RTC_InitStructure);
/* Set the time to 01h 00mn 00s AM */
    RTC_TimeStructure.RTC_H12     = RTC_H12_AM;
    RTC_TimeStructure.RTC_Hours   = 0x00;
    RTC_TimeStructure.RTC_Minutes = 0x00;
    RTC_TimeStructure.RTC_Seconds = 0x00;  
  RTC_SetTime(RTC_Format_BCD, &RTC_TimeStructure);
RTC_WaitForSynchro();
 
  EXTI_ClearITPendingBit(EXTI_Line17);