player/Project/Src/Drive/Source/rtc.c

#include "base.h"
#include "rtc.h"



int RTC_InitNormal (RTC_InitStruct *init)
{
	RTC_InitTypeDef RTC_InitStructure;
	u16 retry=0X1FFF; 
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);//ʹ<><CAB9>PWRʱ<52><CAB1>
	PWR_BackupAccessCmd(ENABLE);	//ʹ<>ܺ󱸼Ĵ<F3B1B8BC><C4B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 

	if(RTC_ReadBackupRegister(RTC_BKP_DR0)!=0x5050)		//<2F>Ƿ<EFBFBD><C7B7><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>?
	{
		RCC_LSEConfig(RCC_LSE_ON);//LSE <20><><EFBFBD><EFBFBD>    
		while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)	//<2F><><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD>RCC<43><43>־λ<D6BE><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,<2C>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD>پ<EFBFBD><D9BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		{
			retry++;
			if (init->delay_ms)
				init->delay_ms(10);
		}
		if(retry==0)return -1;		//LSE <20><><EFBFBD><EFBFBD>ʧ<EFBFBD><CAA7>. 

		RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);		//<2F><><EFBFBD><EFBFBD>RTCʱ<43><CAB1>(RTCCLK),ѡ<><D1A1>LSE<53><45>ΪRTCʱ<43><CAB1>    
		RCC_RTCCLKCmd(ENABLE);	//ʹ<><CAB9>RTCʱ<43><CAB1> 

		RTC_InitStructure.RTC_AsynchPrediv = 0x7F;//RTC<54>첽<EFBFBD><ECB2BD>Ƶϵ<C6B5><CFB5>(1~0X7F)
		RTC_InitStructure.RTC_SynchPrediv  = 0xFF;//RTCͬ<43><CDAC><EFBFBD><EFBFBD>Ƶϵ<C6B5><CFB5>(0~7FFF)
		RTC_InitStructure.RTC_HourFormat   = RTC_HourFormat_24;//RTC<54><43><EFBFBD><EFBFBD>Ϊ,24Сʱ<D0A1><CAB1>ʽ
		RTC_Init(&RTC_InitStructure);
		
		RTC_TimeTypeDef time={0};
		time.RTC_Hours=12;
		time.RTC_H12=RTC_H12_AM;
		RTC_SetTime (RTC_Format_BIN,&time);
		RTC_DateTypeDef data={0};
		data.RTC_Year=19;data.RTC_Month=12;data.RTC_Date=3;data.RTC_WeekDay=1;
		RTC_SetDate(RTC_Format_BIN,&data);
		RTC_WriteBackupRegister(RTC_BKP_DR0,0x5050);	//<2F><><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><D1BE><EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	} 
	return 0;

}