DMT_TCRR
DMTIMER_WRITE4(sc, DMT_TCRR, 0xFFFFFFFF - initial_count);
return (DMTIMER_READ4(sc, DMT_TCRR));
DMTIMER_WRITE4(sc, DMT_TCRR, 0);
first = DMTIMER_READ4(sc, DMT_TCRR);
last = DMTIMER_READ4(sc, DMT_TCRR);
return (DMTIMER_READ4(sc, DMT_TCRR));
DMTIMER_WRITE4(sc, DMT_TCRR, 0);