STM32RTC运用过程：
翻开PWR时钟和Backup区数据拜访
若运用外部低速时钟（LSE），翻开LSE并等候起振
挑选和翻开RTC时钟，等候时钟同步
装备时刻格局，分频系数等
根据需要装备时钟，日期，闹钟，唤醒，输出，时刻戳，备份寄存器等模块
根据需要装备和翻开中止，其间
RTC Alarm ——EXTI line 17
RTC tamper and TImestamps——EXTI line 19
RTC wakeup——EXTI line 20
下面的代码装备日期，时刻，当时时刻设置为 15年05月31日，周日（7），15:50:40，翻开闹钟A和唤醒中止，每一秒钟来一次中止，15:50:45秒发生闹钟中止，用串口打印相应的信息。
代码：
void RTC_Config（void）
{
RTC_TimeTypeDef RTC_TimeStructure;
RTC_DateTypeDef RTC_DateStructure;
RTC_InitTypeDef RTC_InitStructure;
RTC_AlarmTypeDef RTC_AlarmStructure;
RCC_APB1PeriphClockCmd（RCC_APB1Periph_PWR，ENABLE）;
PWR_BackupAccessCmd（ENABLE）;
RCC_BackupResetCmd（ENABLE）;
RCC_BackupResetCmd（DISABLE）;
RCC_LSEConfig（RCC_LSE_ON）;
while（RCC_GetFlagStatus（RCC_FLAG_LSERDY） == RESET）;
RCC_RTCCLKConfig（RCC_RTCCLKSource_LSE）;
RCC_RTCCLKCmd（ENABLE）;
RTC_WaitForSynchro（）;
RTC_InitStructure.RTC_HourFormat=RTC_HourFormat_24;
RTC_InitStructure.RTC_AsynchPrediv=0x7F;
RTC_InitStructure.RTC_SynchPrediv=0xFF;
RTC_Init（&RTC_InitStructure）;
RTC_DateStructure.RTC_Date=31; // 15，05，31
RTC_DateStructure.RTC_Month=RTC_Month_May;
RTC_DateStructure.RTC_Year=15;
RTC_DateStructure.RTC_WeekDay=RTC_Weekday_Sunday;
RTC_SetDate（RTC_Format_BIN，&RTC_DateStructure）;
RTC_TimeStructure.RTC_H12=RTC_H12_AM; // 15:50:40
RTC_TimeStructure.RTC_Hours=15;
RTC_TimeStructure.RTC_Minutes=50;
RTC_TimeStructure.RTC_Seconds=40;
RTC_SetTime（RTC_Format_BIN，&RTC_TimeStructure）;
RTC_AlarmStructure.RTC_AlarmDateWeekDaySel=RTC_AlarmDateWeekDaySel_WeekDay;
RTC_AlarmStructure.RTC_AlarmDateWeekDay=RTC_Weekday_Sunday;
RTC_AlarmStructure.RTC_AlarmMask=RTC_AlarmMask_None;
RTC_AlarmStructure.RTC_AlarmTime=RTC_TimeStructure;// 15:50:40
RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds=45;// 15:50:45
RTC_SetAlarm（RTC_Format_BIN，RTC_Alarm_A，&RTC_AlarmStructure）;
RTC_AlarmCmd（RTC_Alarm_A，ENABLE）;
RTC_ITConfig（RTC_IT_ALRA，ENABLE）;
RTC_ITConfig（RTC_IT_WUT，ENABLE）;
RTC_WakeUpCmd（DISABLE）;
RTC_WakeUpClockConfig（RTC_WakeUpClock_CK_SPRE_16bits）;
RTC_SetWakeUpCounter（0）;
RTC_WakeUpCmd（ENABLE）;
}
void RTC_NvicExti_Config（void）
{
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = RTC_Alarm_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init（&NVIC_InitStructure）;
EXTI_ClearITPendingBit（EXTI_Line17）;
EXTI_InitStructure.EXTI_Line=EXTI_Line17;
EXTI_InitStructure.EXTI_LineCmd =ENABLE;
EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;
EXTI_Init（&EXTI_InitStructure）;
NVIC_InitStructure.NVIC_IRQChannel = RTC_WKUP_IRQn ;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init（&NVIC_InitStructure）;
EXTI_ClearITPendingBit（EXTI_Line20）;
EXTI_InitStructure.EXTI_Line=EXTI_Line20;
EXTI_InitStructure.EXTI_LineCmd =ENABLE;
EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;
EXTI_Init（&EXTI_InitStructure）;
}
