onewire_read_block
void onewire_read_block(void *, void *, int);
onewire_read_block(sc->sc_onewire, &buf[3], DS2423_COUNTER_BUFSZ-3);
onewire_read_block(sc->sc_onewire, data, 9);
onewire_read_block(sc->sc_onewire, data, 9);
onewire_read_block(sc->sc_onewire, data, 9);