RTC_SECONDS
ds1687_write(sc, RTC_SECONDS, dt->dt_sec);
dt->dt_sec = ds1687_read(sc, RTC_SECONDS);
sec = RTC_SECONDS(the_rtc);
sec = RTC_SECONDS(the_rtc);
sec = RTC_SECONDS(the_rtc);
sec = RTC_SECONDS(the_rtc);