ds2482_cmdr
error = ds2482_cmdr(sc, DS2482_SELECT_CHANNEL,
error = ds2482_cmdr(sc, DS2482_DEVICE_RESET, 0, NULL, 0);
xerror = ds2482_cmdr(sc, DS2482_SELECT_CHANNEL,
rv = ds2482_cmdr(sc, cmd, cmdarg, buf, blen);