【灵动微电子MM32F0121测评】4.打印时间戳

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1.rtc外设初始化

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<div class="blockcode"><blockquote>void RTC_Configure(void)

{

    

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_RTC | RCC_APB1Periph_BKP, ENABLE);

    PWR_BackupAccessCmd(ENABLE);  

    BKP_DeInit();                 





    if (BKP_ReadBackupRegister(BKP_DR1) != 0x5D5D) 

    {



        RCC_LSEConfig(RCC_LSE_ON);

        while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET); 



        RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);

        RCC_RTCCLKCmd(ENABLE);



        RTC_WaitForSynchro();

        RTC_WaitForLastTask();

        RTC_SetPrescaler(32767); 

        RTC_WaitForLastTask();



        uint32_t init_seconds = DateToSeconds(RTC_BASE_YEAR, RTC_BASE_MONTH, 

                                            RTC_BASE_DATE, 0, 0, 0);

        RTC_SetCounter(init_seconds);

        RTC_WaitForLastTask();



        RTC_ITConfig(RTC_IT_SEC, ENABLE); 

        RTC_WaitForLastTask();



        BKP_WriteBackupRegister(BKP_DR1, 0x5D5D);

    }

    else

    {

        RTC_WaitForSynchro();

        RTC_ITConfig(RTC_IT_SEC, ENABLE);

        RTC_WaitForLastTask();

    }



    NVIC_InitTypeDef NVIC_InitStruct;

    NVIC_InitStruct.NVIC_IRQChannel = RTC_BKP_IRQn;

    NVIC_InitStruct.NVIC_IRQChannelPriority = 0;

    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;

    NVIC_Init(&NVIC_InitStruct);

}

2.获取日期函数

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void RTC_GetDate(RTC_DateTypeDef* date)

{

    uint32_t counter = RTC_GetCounter();



    uint32_t days = counter / 86400;



    date->RTC_WeekDay = (days + RTC_BASE_WEEKDAY) % 7;



    date->RTC_Year = RTC_BASE_YEAR;



    static const uint8_t month_days[12] = {31,28,31,30,31,30,31,31,30,31,30,31};

    uint8_t month;

    for (month = 0; month < 12; month++) {

        uint8_t days_in_month = month_days[month];

        

        if (month == 1 && IsLeapYear(RTC_BASE_YEAR)) {

            days_in_month = 29;

        }

        

        if (days >= days_in_month) {

            days -= days_in_month;

        } else {

            break;

        }

    }

    date->RTC_Month = month + 1; 

    date->RTC_Date = days + 1;

}

4.获取时间函数

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void RTC_GetTime(RTC_TimeTypeDef* time)

{

    uint32_t counter = RTC_GetCounter();

    

    time->RTC_Seconds = counter % 60;

    counter /= 60;

    time->RTC_Minutes = counter % 60;

    counter /= 60;

    time->RTC_Hours = counter % 24;

}

5.打印函数

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void Get_RTC_Time() 

{

    RTC_DateTypeDef date;

    RTC_TimeTypeDef time;

    uint32_t counter = RTC_GetCounter();

    RTC_GetDate(&date);

    RTC_GetTime(&time);

    

    printf("RTC Counter: %lu\r\n", counter); 

    printf("Days: %lu\r\n", counter / 86400); 

    printf("Current: %04d-%02d-%02d %02d:%02d:%02d Week:%d\r\n",

           date.RTC_Year, date.RTC_Month, date.RTC_Date,

           time.RTC_Hours, time.RTC_Minutes, time.RTC_Seconds,

           date.RTC_WeekDay);

}

6.试验现象

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