RTC_DAY
RTC_PRINT(RTC_DAY);
dt->dt_wday = bcdtobin(rtc_read(RTC_DAY) & 0x07);
rtc_write(RTC_DAY, bintobcd(dt->dt_wday));
d = rtc_read(RTC_DAY);
dt->dt_day = RTC_REG(RTC_DAY10) * 10 + RTC_REG(RTC_DAY);
RTC_WRITE(RTC_DAY, day2);