extern struct ublast_lowlevel *ublast_register_ftdi(void);
extern struct ublast_lowlevel *ublast_register_ftd2xx(void);
extern struct ublast_lowlevel *ublast2_register_libusb(void);
extern struct ublast_lowlevel *ublast_register_ftdi(void);
extern struct ublast_lowlevel *ublast_register_ftd2xx(void);
extern struct ublast_lowlevel *ublast2_register_libusb(void);