STM32L151内部RTC时钟

STM32L151内部RTC时钟

STM32L151系列CPU内置低功耗RTC日历。RTC时钟源可以是LSE、LSI、HSE。为了降低功耗，预分频器被分成两个预分频器。一个7为的异步预分频器，一个13位同步预分频器。
Fclk=32768/[(PREDIV_S+1)*(PREDIV_A+1)]


void RTC_Config(void)


 {


RTC_InitTypeDef RTC_InitStruct;


RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR,ENABLE);


PWR_RTCAccessCmd(ENABLE);


#if defined RTC_CLOCK_SOURCE_LSI


RTC_LSICmd(ENABLE);


 while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET);


RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);


#elif defined RTC_CLOCK_SOURCE_LSE


RTC_LSEConfig(RCC_LSE_ON);


while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET);


RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);


 #else #error Please select the RTC Clock Source inside the main.c file


#endif


RCC_RTCCLKCmd(ENABLE);


RTC_WaitForSynchro();


 RTC_InitStruct.RTC_HourFormat = RTC_HourFormat_24;


RTC_InitStruct.RTC_AsynchPrediv = 0x7F;


RTC_InitStruct.RTC_SynchPrediv = 0xFF;


 RTC_Init(&RTC_InitStruct);


}


void RTC_TimeRegulate(void)


 {


RTC_TimeTypeDef RTC_TimeStruct;


RTC_DateTypeDef RTC_DateStruct;


RTC_TimeStruct.RTC_Hours = 23;


RTC_TimeStruct.RTC_Minutes = 59;


RTC_TimeStruct.RTC_Seconds = 59;


RTC_TimeStruct.RTC_H12 = RTC_H12_AM;


RTC_SetTime(RTC_Format_BIN,&RTC_TImeStruct);


RTC_DateStruct.RTC_Year = 12;


RTC_DateStruct.RTC_Date = 31;


RTC_DateStruct.RTC_Month = 12;


RTC_DateStruct.RTC_WeekDay = 1;


RTC_SetDate(RTC_Format_BIN,&RTC_DateStruct);


}


void RTC_TimeShow(unsigned char *pDate)


{


RTC_TimeTypeDef RTC_TimeStruct;


RTC_DateTypeDef RTC_DateStruct;


RTC_GetTime(RTC_Format_BIN,&RTC_TImeStruct);


RTC_GetDate(RTC_Format_BIN,&RTC_DateStruct);


pDate[0] = RTC_TimeStruct.RTC_Hours;


pDate[1] = RTC_TimeStruct.RTC_Minutes;


pDate[2] = RTC_TimeStruct.RTC_Seconds ;


pDate[3] = RTC_DateStruct.RTC_Year;


pDate[4] = RTC_DateStruct.RTC_Date;


pDate[5] = RTC_DateStruct.RTC_Month ;


pDate[6] = RTC_DateStruct.RTC_WeekDay ;


}