+CREATE_SETTER(baudrate, int)
+CREATE_SETTER(bits, int)
+CREATE_SETTER(parity, enum sp_parity)
+CREATE_SETTER(stopbits, int)
+CREATE_SETTER(rts, enum sp_rts)
+CREATE_SETTER(cts, enum sp_cts)
+CREATE_SETTER(dtr, enum sp_dtr)
+CREATE_SETTER(dsr, enum sp_dsr)
+CREATE_SETTER(xon_xoff, enum sp_xonxoff)
+
+enum sp_return sp_set_flowcontrol(struct sp_port *port, enum sp_flowcontrol flowcontrol)