RTC.c

#include "r_typedefs.h"
#include "dr7f701441.dvf.h"
#include "RTC.h"

volatile uint8_t g_RTCLeapYear; /*1:LeapYear , 0:Not a leap year*/
volatile RTC_Information_st_t g_stRTCInformation;

static uint8_t Cal_RTC_Week(uint16_t Year, uint8_t Month, uint8_t Day);

/* BCD Convert   decimalism*/
/*The valid range of parameters is not judged*/
static uint8_t RTC_BCD_To_Dec(uint8_t u8RTCBCD)
{
    uint8_t u8RTCData = ((u8RTCBCD >> 4U) * 10U) + (u8RTCBCD & 0X0FU);
    return u8RTCData;
}
/* decimalism Convert  BCD */
static uint8_t RTC_Dec_To_BCD(uint8_t u8RTCDec)
{
    uint8_t u8RTCData = (((u8RTCDec / 10U) % 10U) << 4U) + (u8RTCDec % 10U);
    return u8RTCData;
}

/**************************************************************************/ /**
  * \brief      Determine if a year is leap year
  * \param      Year: the year to be determined
  * \retval     \arg 0: Not leap year
  *             \arg 1: Leap year
******************************************************************************/
static uint8_t RTC_Determine_Leap_Year(uint16_t Year)
{
    uint16_t u16RTCLeapYear = Year;

    /*u16RTCLeapYear = ((Year >> 4) & 0x0F) * 10 + (Year & 0x0F);*/

    if (u16RTCLeapYear & 0x0003U)
    {
        u16RTCLeapYear = 0U;
    }
    else
    {
        u16RTCLeapYear = 1U;
    }

    return (uint8_t)u16RTCLeapYear;
}

static void RTC_Stop(void)
{
    /*Stop sub-counter */
    RTCA0CE = 0U;
    /*Wait  sub-counter  stop*/
    while (RTCA0CEST != 0)
    {
        ;
    }
}
void RTC_Pre_Init(void)
{
    RTC_Stop(); /* Stop RTCA*/

#if (RTC_MODE_SELECT == RTC_MODE_MAIN)
    RTCA0SLSB = 1U;			   /*Frequency selection mode*/
    RTCA0SCMP = 4000000U - 1U; /*4M*/
#else
    RTCA0SLSB = 0U; /*32.768 kHz mode*/
    RTCA0SUBU = 0U; /*Reserved Later modified,Error Correction*/
#endif

    RTCA0AMPM = 1U; /*fix 24Hour Format*/

    /*Write start values*/
    RTCA0YEAR = RTC_Dec_To_BCD(RTC_DEFAULT_YEAR);
    RTCA0MONTH = RTC_Dec_To_BCD(RTC_DEFAULT_MONTH);
    RTCA0DAY = RTC_Dec_To_BCD(RTC_DEFAULT_DATE);
    RTCA0HOUR = RTC_Dec_To_BCD(RTC_DEFAULT_HOUR);
    RTCA0MIN = RTC_Dec_To_BCD(RTC_DEFAULT_MINUTE);
    RTCA0SEC = RTC_Dec_To_BCD(RTC_DEFAULT_SECOND);

    /*Starts sub-counter*/
    RTCA0CE = 1U;

    /*Wait  sub-counter  enable*/
    while (RTCA0CEST != 1U)
    {
        ;
    }
}

void RTC_Set_Time(RTC_Information_st_t *pstRTCTime)
{
    while (RTCA0WST != 0U) /*Check that all clock counters are running.*/
    {
        ;
    }
    RTCA0WAIT = 1U;		   /*Stop all clock counters*/
    while (RTCA0WST != 1U) /*Wait  all clock counters  stop*/
    {
        ;
    }
    /*Write start values*/
    RTCA0YEAR = RTC_Dec_To_BCD(pstRTCTime->u8RTCYear);
    RTCA0MONTH = RTC_Dec_To_BCD(pstRTCTime->u8RTCMonth);
    RTCA0DAY = RTC_Dec_To_BCD(pstRTCTime->u8RTCDayOfMonth);
    RTCA0HOUR = RTC_Dec_To_BCD(pstRTCTime->u8RTCHour);
    RTCA0MIN = RTC_Dec_To_BCD(pstRTCTime->u8RTCMinute);
    RTCA0SEC = RTC_Dec_To_BCD(pstRTCTime->u8RTCSecond);

    /*Start all clock counters*/
    RTCA0WAIT = 0U;
    while (RTCA0WST != 0U) /*Check that all clock counters are running.*/
    {
        ;
    }
}
/**************************************************************************/ /**
  * \brief      Rreal time clock timing control
  * \attention  Call this function every 100 ms.
  * \retval     None
******************************************************************************/
void RTC_Timing_Service(void)
{
    uint8_t Week = 0 ;
    while (RTCA0WST != 0U) /*Check that all clock counters are running.*/
    {
        ;
    }
    RTCA0WAIT = 1U;		   /*Stop all clock counters*/
    while (RTCA0WST != 1U) /*Wait  all clock counters  stop*/
    {
        ;
    }
    /*Read  data*/
    g_stRTCInformation.u8RTCYear = RTC_BCD_To_Dec(RTCA0YEAR);
    g_stRTCInformation.u8RTCMonth = RTC_BCD_To_Dec(RTCA0MONTH);
    g_stRTCInformation.u8RTCDayOfMonth = RTC_BCD_To_Dec(RTCA0DAY);
    g_stRTCInformation.u8RTCHour = RTC_BCD_To_Dec(RTCA0HOUR);
    g_stRTCInformation.u8RTCMinute = RTC_BCD_To_Dec(RTCA0MIN);
    g_stRTCInformation.u8RTCSecond = RTC_BCD_To_Dec(RTCA0SEC);


    Week = Cal_RTC_Week(g_stRTCInformation.u8RTCYear, g_stRTCInformation.u8RTCMonth, g_stRTCInformation.u8RTCDayOfMonth);

    if (Week)
    {
        g_stRTCInformation.u8RTCWeek = Week ;
    }



    g_RTCLeapYear = RTC_Determine_Leap_Year(g_stRTCInformation.u8RTCYear);
    /*Start all clock counters*/
    RTCA0WAIT = 0U;
    while (RTCA0WST != 0U) /*Check that all clock counters are running.*/
    {
        ;
    }
}
void RTC_Init(void)
{
    RTC_Timing_Service();
}


/*计算 星期几*/
static uint8_t Cal_RTC_Week(uint16_t Year, uint8_t Month, uint8_t Day)
{
    static uint8_t DefaultWeek = 6 ; //2000.1.1
    static uint16_t OldYear = 0 ;
    static uint8_t OldMonth = 0 ;
    static uint8_t OldDay = 0 ;
    uint8_t u8Result = 0 ;
    uint32_t DiffDay = 0 ;
    uint16_t DiffYear = 0 ;
    uint16_t DiffMouth = 0 ;

    if ((Year != OldYear) || (Month != OldMonth) || (Day != OldDay))
    {
        OldYear = Year ;
        OldMonth = Month ;
        OldDay = Day ;

        DiffYear = Year - 0 ;
        DiffMouth = Month - 1 ;

        while (DiffYear)
        {
            if (RTC_Determine_Leap_Year((DiffYear - 1)))
            {
                DiffDay += 366 ;
            }
            else
            {
                DiffDay += 365 ;
            }

            DiffYear -- ;
        }

        while (DiffMouth)
        {
            switch (DiffMouth + 1)
            {
            case 1 :
            case 3 :
            case 5 :
            case 7 :
            case 8 :
            case 10:
            case 12:
                DiffDay += 31 ;
                break ;
            case 4 :
            case 6 :
            case 9 :
            case 11 :
                DiffDay += 30 ;
                break ;
            case 2 :
                if (RTC_Determine_Leap_Year(Year))
                {
                    DiffDay += 29 ;
                }
                else
                {
                    DiffDay += 28 ;
                }
                break ;
            }

            DiffMouth -- ;
        }

        DiffDay += (Day - 1) ;

        DiffDay %= 7 ;

        DiffDay += DefaultWeek ;

        if (DiffDay > 7)
        {
            DiffDay -= 7 ;
        }

        u8Result = (uint8_t)DiffDay ;

    }

    return u8Result ;
}