const char* description, const char* serial);
int ftdi_usb_open_desc_index(struct ftdi_context *ftdi, int vendor, int product,
const char* description, const char* serial, unsigned int index);
+ int ftdi_usb_open_bus_addr(struct ftdi_context *ftdi, uint8_t bus, uint8_t addr);
int ftdi_usb_open_dev(struct ftdi_context *ftdi, struct libusb_device *dev);
int ftdi_usb_open_string(struct ftdi_context *ftdi, const char* description);