STM32之RTC配置與初始化-rtc.h rtc.c

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<rtc.h>#include "stm32f10x.h"#ifndef _RTC_H#define _RTC_Htypedef struct{    vu8 hour;    vu8 mintue;    vu8 second;    vu16 year;    vu8 month;    vu8 day;    vu8 week;}_calendar_obj;// extern _calendar_obj Calendar;u8 RTC_Init(void);u8 Is_Leap_Year(u16 _year);_calendar_obj RTC_GetCalendar(void);u8 RTC_GetWeek(u16 _year,u8 _month,u8 _day);u8 RTC_SetCalendar(u16 _year,u8 _month,u8 _day,u8 _hour,u8 _min,u8 _second);#endif<rtc.c>#include "rtc.h"const u8 month_table[]={31,28,31,30,31,30,31,31,30,31,30,31};const u8 week_table[]={0,3,3,6,1,4,6,2,5,0,3,5};_calendar_obj Calendar;void delay_ms(u16 time){    u16 i=0;    while(time--)    {        i=12000;        while(i--);    }}u8 Is_Leap_Year(u16 _year){    if((_year%4 && _year%100!=0) | (_year%400==0)) return 0;    else return 1;}u8 RTC_Init(void){    u16 temp=0;    //enable RTC_CLK outside    if(BKP_ReadBackupRegister(BKP_DR1)!=0x5050)    {        RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR|RCC_APB1Periph_BKP,ENABLE);        PWR_BackupAccessCmd(ENABLE);        BKP_DeInit();        RCC_LSEConfig(RCC_LSE_ON);        while(RCC_GetFlagStatus(RCC_FLAG_HSERDY)==RESET)        {            temp++;            delay_ms(10);        }        if(temp>250) return 0;        RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);        RCC_RTCCLKCmd(ENABLE);        RTC_WaitForLastTask();        RTC_ITConfig(RTC_IT_SEC,ENABLE);        RTC_WaitForLastTask();        RTC_SetPrescaler(32767);        RTC_WaitForLastTask();        RTC_SetCalendar(2015,10,10,10,10,10);        RTC_ExitConfigMode();          BKP_WriteBackupRegister(BKP_DR1,0x5050);    }    else    {        RTC_WaitForSynchro();        RTC_ITConfig(RTC_IT_SEC,ENABLE);        RTC_WaitForLastTask();    }    return 1;}_calendar_obj RTC_GetCalendar(void){    static u16 daycount=0;    u32 timecount=RTC_GetCounter();    u32 daynum=timecount/86400;  //day    u16 temp=0;        //Calendar year    if(daycount!=daynum)  //>1    {        daycount=daynum;        temp=1970;        while(daynum>365)        {            if(Is_Leap_Year(temp))            {                if(daynum>=366)                    daynum=daynum-366;                else                    break;            }            else                daynum=daynum-365;            temp++;        }        Calendar.year=temp;  // set year        temp=0;  //reset temp                // Calendar month        while(daynum>=28)        {            if(Is_Leap_Year(Calendar.year) && temp==1)            {                if(daynum>=29) daynum=daynum-29;                else break;            }            else            {                if(daynum>=month_table[temp])                    daynum=daynum-month_table[temp];                else                    break;            }            temp++;        }        Calendar.month=temp+1;  //set month        Calendar.day=daynum+1;  //set day    }        daynum=timecount%86400;    Calendar.hour=daynum/3600;  //set hour    Calendar.mintue=(daynum%3600)/60;  //set mintue    Calendar.second=(daynum%3600)%60;  //set second        return Calendar;}u8 RTC_SetCalendar(u16 _year,u8 _month,u8 _day,u8 _hour,u8 _min,u8 _second){    u16 i;    u32 seccount=0;  //second total    if(_year<1970 || _year>2099) return 1;  //valid year        //calculate year    for(i=1970;i<_year;i++)    {        if(Is_Leap_Year(i))            seccount=seccount+3600*24*366; //3600*24*366=31622400        else            seccount=seccount+3600*24*365; //3600*24*365=31536000    }    //calculate month    _month=_month-1;    for(i=0;i<_month;i++)    {        seccount=seccount+(u32)month_table[i]*3600*24;        if(Is_Leap_Year(_year) && i==1)  //February,add 1 day        {            seccount=seccount+3600*24;        }    }        //calculate day    seccount=seccount+(u32)(_day-1)*3600*24;    seccount+=(u32)_hour*3600;    seccount+=(u32)_min*60;    seccount+=_second;        //set Calendar    RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR|RCC_APB1Periph_BKP,ENABLE);    PWR_BackupAccessCmd(ENABLE);    RTC_SetCounter(seccount);    RTC_WaitForLastTask();        return 0;}u8 RTC_GetWeek(u16 _year,u8 _month,u8 _day){    u16 temp;    u8 yearH,yearL;    yearH=_year/100;  //   2016/100=20    yearL=_year%100;  //   2016%100=16        if(yearH>19) yearL+=100;    temp=yearL+yearL/4;    temp=temp+_day+week_table[_month-1];    if(yearL%4==0 && _month<3)        temp=temp-1;        return temp%7;}

 

STM32之RTC配置與初始化-rtc.h rtc.c