GPIB-USBCDC is an interface bridge between GPIB (HPIB) and USB communication device class. It is Prologix GPIB-USB adapter clone with EFM8 Universal Bee or C8051F38x microcontroller.

1. Connect GPIB-USBCDC to the PC. GPIB-USBCDC is recognized as serial port, which will be installed with CDC inf file.
2. Other usage is almost same as Prologix GPIB-USB adapter. Please see that product manual.

EagleCAD files are available (ver.1 schematics and layout. Its components are listed in BOM. The board design is published under Creative Commons Attribution-ShareAlike 4.0 International.

The official binary is published in github release. To build the firmware by yourself, install sdcc (testing with ver 3.3.0 #8604), and just "make" at "firmware" directory of the downloaded code. The generated firmware name is gpib-usbcdc.hex. The firmware code is published under New BSD License.

Connect a GPIB-USBCDC board and a PC via USB debug adapter (UDA) or compatible one. The minimum required programming connections are summarized in the following table. Then, use Flash Programming Utilities. Note: the board may not be recognized by a PC when an UDA is connected via USB hubs. UDA is recommended to connect a PC directly.

• The project owner's website is Fenrir's BLog.