STM32之RTC配置与初始化-rtc.h rtc.c

<rtc.h>
#include "stm32f10x.h"
#ifndef _RTC_H
#define _RTC_H
typedef 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[]={,,,,,,,,,,,};
const u8 week_table[]={,,,,,,,,,,,};

_calendar_obj Calendar;

void delay_ms(u16 time)
{
    u16 i=;
    while(time--)
    {
        i=;
        while(i--);
    }
}

u8 Is_Leap_Year(u16 _year)
{
    if((_year% && _year%!=) | (_year%==)) return ;
    else return ;
}

u8 RTC_Init(void)
{
    u16 temp=;
    //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();
        }
        if(temp>) return ;
        RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
        RCC_RTCCLKCmd(ENABLE);
        RTC_WaitForLastTask();
        RTC_ITConfig(RTC_IT_SEC,ENABLE);
        RTC_WaitForLastTask();
        RTC_SetPrescaler();
        RTC_WaitForLastTask();
        RTC_SetCalendar(,,,,,);
        RTC_ExitConfigMode();
        BKP_WriteBackupRegister(BKP_DR1,0x5050);
    }
    else
    {
        RTC_WaitForSynchro();
        RTC_ITConfig(RTC_IT_SEC,ENABLE);
        RTC_WaitForLastTask();
    }
    return ;
}

_calendar_obj RTC_GetCalendar(void)
{
    static u16 daycount=;
    u32 timecount=RTC_GetCounter();
    u32 daynum=timecount/;  //day
    u16 temp=;

    //Calendar year
    if(daycount!=daynum)  //>1
    {
        daycount=daynum;
        temp=;
        while(daynum>)
        {
            if(Is_Leap_Year(temp))
            {
                if(daynum>=)
                    daynum=daynum-;
                else
                    break;
            }
            else
                daynum=daynum-;
            temp++;
        }
        Calendar.year=temp;  // set year
        temp=;  //reset temp

        // Calendar month
        while(daynum>=)
        {
            if(Is_Leap_Year(Calendar.year) && temp==)
            {
                if(daynum>=) daynum=daynum-;
                else break;
            }
            else
            {
                if(daynum>=month_table[temp])
                    daynum=daynum-month_table[temp];
                else
                    break;
            }
            temp++;
        }
        Calendar.month=temp+;  //set month
        Calendar.day=daynum+;  //set day
    }

    daynum=timecount%;
    Calendar.hour=daynum/;  //set hour
    Calendar.mintue=(daynum%)/;  //set mintue
    Calendar.second=(daynum%)%;  //set second

    return Calendar;
}

u8 RTC_SetCalendar(u16 _year,u8 _month,u8 _day,u8 _hour,u8 _min,u8 _second)
{
    u16 i;
    u32 seccount=;  //second total
    if(_year< || _year>) return ;  //valid year

    //calculate year
    for(i=;i<_year;i++)
    {
        if(Is_Leap_Year(i))
            seccount=seccount+**; //3600*24*366=31622400
        else
            seccount=seccount+**; //3600*24*365=31536000
    }
    //calculate month
    _month=_month-;
    for(i=;i<_month;i++)
    {
        seccount=seccount+(u32)month_table[i]**;
        if(Is_Leap_Year(_year) && i==)  //February,add 1 day
        {
            seccount=seccount+*;
        }
    }

    //calculate day
    seccount=seccount+(u32)(_day-)**;
    seccount+=(u32)_hour*;
    seccount+=(u32)_min*;
    seccount+=_second;

    //set Calendar
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR|RCC_APB1Periph_BKP,ENABLE);
    PWR_BackupAccessCmd(ENABLE);
    RTC_SetCounter(seccount);
    RTC_WaitForLastTask();

    return ;
}

u8 RTC_GetWeek(u16 _year,u8 _month,u8 _day)
{
    u16 temp;
    u8 yearH,yearL;
    yearH=_year/;  //   2016/100=20
    yearL=_year%;  //   2016%100=16

    if(yearH>) yearL+=;
    temp=yearL+yearL/;
    temp=temp+_day+week_table[_month-];
    if(yearL%== && _month<)
        temp=temp-;

    return temp%;
}