正点原子 发表于 2017-3-29 20:56
帮顶

感谢帮顶，问题解决了。但时现在想想还是定时唤醒好，闹钟唤醒每次唤醒之后RTC会被重置，闹钟也就没啥意义了。
定时唤醒代码如下：需要的可以参考一下
void StandbyRTCLSIMode_Measure(void)
{
         
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);  /* Enable PWR APB1 Clock */
  PWR_RTCAccessCmd(ENABLE);    /* Allow access to RTC */
  RCC_RTCResetCmd(ENABLE);   /* Reset RTC Domain *///¸′λRTCÇøóò
  RCC_RTCResetCmd(DISABLE);
       
  PWR_RTCAccessCmd(ENABLE);/* Allow access to RTC */
  
  RCC_LSICmd(ENABLE);/*!< LSI Enable */
  while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) /*!< Wait till LSI is ready */
  {}
  RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);/*!< RTC Clock Source Selection */
  RCC_RTCCLKCmd(ENABLE);/* Enable the RTC Clock */
  RTC_WaitForSynchro();  /* Wait for RTC APB registers synchronisation */
  PWR_UltraLowPowerCmd(ENABLE);/* Enable Ultra low power mode */
  /* RTC Wakeup Interrupt Generation: Clock Source: RTCCLK_Div16, Wakeup Time Base: ~4s
     RTC Clock Source LSI ~37KHz  
  */
  RTC_WakeUpClockConfig(RTC_WakeUpClock_RTCCLK_Div16);
  RTC_SetWakeUpCounter(0x8421);
  RTC_ITConfig(RTC_IT_WUT, ENABLE);/* Enable the Wakeup Interrupt */
  RTC_WakeUpCmd(ENABLE); /* Enable Wakeup Counter */
  RTC_ClearFlag(RTC_FLAG_WUTF);/* Clear WakeUp (WUTF) pending flag */
  PWR_EnterSTANDBYMode();/* Request to enter STANDBY mode (Wake Up flag is cleared in PWR_EnterSTANDBYMode function) */
  
}