readrtc
year = readrtc(RTC_YEAR) + readrtc(RTC_CENTURY) * 100;
year = readrtc(RTC_YEAR) + 1900;
month = readrtc(RTC_MONTH);
days += readrtc(RTC_DAY) - 1;
readrtc(RTC_HRS)) * 60 +
readrtc(RTC_MIN)) * 60 +
readrtc(RTC_SEC));