* configured USRP (firmware loaded)
* unconfigured Cypress FX2 (only if fx2_ok_p is true)
*/
-libusb_device *usrp_find_device (int nth, bool fx2_ok_p = false, libusb_context *ctx);
+libusb_device *usrp_find_device (int nth, bool fx2_ok_p = false, libusb_context *ctx = NULL);
bool usrp_usrp_p (libusb_device *q); //< is this a USRP
bool usrp_usrp0_p (libusb_device *q); //< is this a USRP Rev 0
* then rescans the busses and devices.
*/
usrp_load_status_t
-usrp_load_firmware_nth (int nth, const char *filename, bool force, libusb_context *ctx);
+usrp_load_firmware_nth (int nth, const char *filename, bool force, libusb_context *ctx = NULL);
/*!
* \brief load fpga configuration bitstream