STM32F030 RTC 是不是不能中断循环？

Samtu 提问时间：2017-6-12 20:34 /

STM32F030 的RTC 定时3秒，进入中断后，清除所有标志位，再重设定时时间3秒，后开闹钟，竟然不能再进中断？这个是为什么

if(RTC_GetITStatus(RTC_IT_ALRA)!=0)//RTC_IT_ALRA
{

}
RCC_LSICmd(DISABLE);//OPEN LSI
RTC_AlarmCmd(RTC_Alarm_A,DISABLE);//ÄÖÖÓÊ¹ÄÜ
RTC_ITConfig(RTC_IT_ALRA, DISABLE);//ÖÐ¶ÏÅäÖÃ

     RTC_ClearFlag(RTC_FLAG_ALRAF);//alarm flag
      RTC_ClearFlag(RTC_FLAG_WUTF);//WakeUp Timer flag
   RTC_ClearFlag(RTC_FLAG_TAMP2F);
RTC_ClearFlag(RTC_FLAG_TAMP1F);
RTC_ClearFlag(RTC_FLAG_TSOVF);
RTC_ClearFlag(RTC_FLAG_TSF);
RTC_ClearFlag(RTC_FLAG_RSF);

      RTC_ClearITPendingBit(RTC_IT_TS);
      RTC_ClearITPendingBit(RTC_IT_WUT);
      RTC_ClearITPendingBit(RTC_IT_ALRA);
      RTC_ClearITPendingBit(RTC_IT_TAMP1);
      RTC_ClearITPendingBit(RTC_IT_TAMP2);

   sleeptemp1=11;

IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);//DOGÐ´Ê¹ÄÜ 0X5555
IWDG_SetPrescaler(0X7);//Ô¤·ÖÆµ
IWDG_SetReload(0XAAAA);//×°ÔØÖµ
IWDG_ReloadCounter();//0XAAAA
IWDG_Enable();//¿ªÆôDOG

EXTI_ClearITPendingBit(EXTI_Line0 | EXTI_Line2 | EXTI_Line4 | EXTI_Line1 | EXTI_Line17);    // ?? EXIT ????

      RTC_AlarmCmd(RTC_Alarm_A,DISABLE);//RTC-CR-ALARM ¹ØµôÄÖÖÓ
RTC_TIMESET.RTC_H12    = RTC_H12_AM;
RTC_TIMESET.RTC_Hours = 0x02;
RTC_TIMESET.RTC_Minutes = 0x00;
RTC_TIMESET.RTC_Seconds = 0x02;
RTC_SetTime(RTC_Format_BIN, &RTC_TIMESET);

   RTC_SLEEP();
   sleeptemp1=1;
   RTC_ITConfig(RTC_IT_ALRA, ENABLE);//ÖÐ¶ÏÅäÖÃ

}

void RTC_CONFIG(void)
{
  RTC_InitTypeDef RTC_InitStruct;
  RTC_TimeTypeDef RTC_TIMESET;

int LSIFreq=40000;
RTC_INT();
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR,ENABLE);//open the clock
PWR_BackupAccessCmd(ENABLE);//POWER OPEN
PWR_ClearFlag(PWR_FLAG_WU);
RCC_LSICmd(ENABLE);//OPEN LSI

   /* Wait till LSI is ready */
  while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
  {}

  /* Check if the StandBy flag is set */
  if (PWR_GetFlagStatus(PWR_FLAG_SB) != RESET)
  {
/* Clear StandBy flag */
PWR_ClearFlag(PWR_FLAG_SB);

/* Check if the StandBy flag is cleared */
if (PWR_GetFlagStatus(PWR_FLAG_SB) != RESET)
{
   while(1);
}
        IWDG_ReloadCounter();//FEED WACHDOG
RTC_WaitForSynchro();

/* No need to configure the RTC as the RTC config(clock source, enable,
prescaler,...) are kept after wake-up from STANDBY */
  }
  else
  {
/* RTC Configuration ******************************************************/
/* Reset Backup Domain */
RCC_BackupResetCmd(ENABLE);
RCC_BackupResetCmd(DISABLE);

/* Select the RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);//4000

/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);

/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
IWDG_ReloadCounter();//FEED WACHDOG
/* Get the LSI frequency:  TIM14 is used to measure the LSI frequency */
//LSIFreq = GetLSIFrequency();

RTC_InitStruct.RTC_HourFormat = RTC_HourFormat_24;
RTC_InitStruct.RTC_AsynchPrediv = 127;
// RTC_InitStruct.RTC_SynchPrediv =  (LSIFreq/100) - 1;
   RTC_InitStruct.RTC_SynchPrediv =  255;
RTC_Init(&RTC_InitStruct);

/* Set the time to 01h 00mn 00s AM */
RTC_TIMESET.RTC_H12    = RTC_H12_AM;
RTC_TIMESET.RTC_Hours = 0x02;
RTC_TIMESET.RTC_Minutes = 0x00;
RTC_TIMESET.RTC_Seconds = 0x00;

IWDG_ReloadCounter();//FEED WACHDOG
RTC_SetTime(RTC_Format_BIN, &RTC_TIMESET);
  }
//  RTC_DeInit();//³õÊ¼»¯RTC¸÷¼Ä´æÆ÷Îª³õÖµ
//
// RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);//4000 RCC_RTCCLKSource_LSI  LSI_VALUE  RCC_RTCCLKSource_LSI
// RCC_RTCCLKCmd(ENABLE);//ENABLE rtc CLOCK
}
void RTC_INT(void)
{
  EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;IWDG_ReloadCounter();//FEED WACHDOG
      /* Configure EXTI Line17(RTC Alarm) to generate an interrupt on rising edge */
      EXTI_ClearITPendingBit(EXTI_Line17);//¡¢¡¢RTC_IRQn
      EXTI_InitStructure.EXTI_Line = EXTI_Line17;
      EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;//EXTI_Mode_Event  EXTI_Mode_Interrupt
      EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
      EXTI_InitStructure.EXTI_LineCmd = ENABLE;
      EXTI_Init(&EXTI_InitStructure);
IWDG_ReloadCounter();//FEED WACHDOG
      /* Enable the RTC Interrupt */
      NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;//TIM17_IRQn
      NVIC_InitStructure.NVIC_IRQChannelPriority = 1;//NVIC_IRQChannelPriority
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

      NVIC_Init(&NVIC_InitStructure);
//EXTI_ClearITPendingBit(EXTI_Line0 | EXTI_Line2 | EXTI_Line4 | EXTI_Line1 | EXTI_Line17);    // ?? EXIT ????
IWDG_ReloadCounter();//FEED WACHDOG

}
void RTC_SLEEP(void)
{
  RTC_AlarmTypeDef RTC_AlarmStructure;
RTC_TimeTypeDef RTC_TIMESET;
  RTC_AlarmCmd(RTC_Alarm_A,DISABLE);//RTC-CR-ALARM ¹ØµôÄÖÖÓ
IWDG_ReloadCounter();//FEED WACHDOG
RTC_GetTime(RTC_Format_BIN, &RTC_TIMESET);

RTC_AlarmStructure.RTC_AlarmTime.RTC_H12=RTC_H12_AM;//0
RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours=0x02;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes=0x00;
// RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds=( RTC_TIMESET.RTC_Seconds + 0x3b )%60;
  RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds=0x02; //¶¨Ê±Ê±¼äÃë

IWDG_ReloadCounter();//FEED WACHDOG
RTC_AlarmStructure.RTC_AlarmDateWeekDay = 31;
  RTC_AlarmStructure.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date;
  RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_DateWeekDay | RTC_AlarmMask_Hours | RTC_AlarmMask_Minutes;
  RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);

   /* Clear RTC Alarm Flag */
  RTC_ClearFlag(RTC_FLAG_ALRAF);

RTC_ClearFlag(RTC_FLAG_ALRAF);//alarm flag
RTC_ClearFlag(RTC_FLAG_WUTF);//WakeUp Timer flag
RTC_ClearITPendingBit(RTC_IT_TS);
RTC_ClearITPendingBit(RTC_IT_ALRA);
RTC_ClearITPendingBit(RTC_IT_TAMP1);
RTC_ClearITPendingBit(RTC_IT_TAMP2);
/* Enable RTC Alarm A Interrupt: this Interrupt will wake-up the system from
  STANDBY mode (RTC Alarm IT not enabled in NVIC) */
  RTC_ITConfig(RTC_IT_ALRA, ENABLE);

  /* Enable the Alarm A */
  RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
  IWDG_ReloadCounter();//FEED WACHDOG
  /* Clear RTC Alarm Flag */
//  RTC_ClearFlag(RTC_FLAG_ALRAF);
// EXTI_ClearITPendingBit(EXTI_Line0 | EXTI_Line2 | EXTI_Line4 | EXTI_Line1 | EXTI_Line17);    // ?? EXIT ????
// PWR_EnterSTANDBYMode();

// PWR_EnterSTOPMode(PWR_Regulator_ON,PWR_STOPEntry_WFI);//WFI=every interrput  PWR_Regulator_LowPower PWR_Regulator_ON
}