SC16IS7XX_REGISTER_IOCONTROL
error = sc->sc_funcs->read_reg(sc, SC16IS7XX_REGISTER_IOCONTROL, 1, &iocontrol, 1);
error = sc->sc_funcs->write_reg(sc, SC16IS7XX_REGISTER_IOCONTROL, 1, &iocontrol, 1);
error = sc->sc_funcs->read_reg(sc, SC16IS7XX_REGISTER_IOCONTROL, 1, &iocontrol, 1);
error = sc->sc_funcs->write_reg(sc, SC16IS7XX_REGISTER_IOCONTROL, 1, &iocontrol, 1);
error = sc->sc_funcs->read_reg(sc, SC16IS7XX_REGISTER_IOCONTROL, 0, &iocontrol_reg, 1);
sc->sc_funcs->write_reg(sc, SC16IS7XX_REGISTER_IOCONTROL, 0, &iocontrol_reg, 1);
error = sc->sc_funcs->read_reg(sc, SC16IS7XX_REGISTER_IOCONTROL, 0, &iocontrol_reg, 1);
error = sc->sc_funcs->read_reg(sc, SC16IS7XX_REGISTER_IOCONTROL, 1, &iocontrol_reg, 1);
error = sc->sc_funcs->write_reg(sc, SC16IS7XX_REGISTER_IOCONTROL, 1, &iocontrol_reg, 1);
error = sc->sc_funcs->read_reg(sc, SC16IS7XX_REGISTER_IOCONTROL, 1, &iocontrol_reg, 1);