rtc_dec
hour = rtc_dec(rtc, hour, errp);
val = rtc_dec(rtc, val, &err);
val = rtc_dec(rtc, val, &err);
ct.sec = rtc_dec(rtc, rtc->sec, &err);
ct.min = rtc_dec(rtc, rtc->min, &err);
ct.day = rtc_dec(rtc, rtc->day_of_month, &err);
ct.mon = rtc_dec(rtc, rtc->month, &err);
const uint_t year = rtc_dec(rtc, rtc->year, &err);
const uint_t century = rtc_dec(rtc, rtc->century, &err);