Skip to content
Go to file

Latest commit


Git stats


Failed to load latest commit information.
Latest commit message
Commit time

eXtreme Fedback Device

The aim is to bring the feedback from the continous integration build faster to the developer. For this a microcontroller (PIC18Fxx5x) controls some indicators (typically three LEDs mimicing a traffic light). The host runs a java program that polls the CI build server and tells the microcontroller via usb which LED(s) to light.

The device has its own official USB address (0x1d50:0x6039), thanks to Openmoko Inc. (see ).

The USB firmware is now extracted in the spin-off project . It is used as a git submodule in this project.

Project Setup

Clone the sources and initialize the submodule: $ git clone git:// $ cd XFD $ git submodule init $ git submodule update


To build: Run make in the top level directory like this: $ make

Needs to compile: make, gcc++, javac, maven, gputils Needs at runtime: java, libusb-1.0 (on Linux), WinUSB driver (on Windows)

You will find the firmware under device/XFD.hex, flash your PIC with it.

The program for your host will be a jar file under buildmonitor/target named buildmonitor-*-jar-with-dependencies.jar. Start it with a command line like this:

$ java -jar buildmonitor-*-jar-with-dependencies.jar

Note: On Windows (before Windows 8) you need to install the WinUSB driver for generic USB devices once before you can use it. You can use Zadig ( for that purpose.


Directories: firmware git submodule contains the USB firmware device main routine and USB descriptor for this device host C++ executable and some demo scripts, mainly used to test the hardware and firmware (Linux only) java/usbleds usb leds java driver (tested on Linux and Windows 7) java/buildmonitor main program with the build monitor hardware device hardware

See also the file CREDITS.

Branches: master: main branch, uses PIC18F13K50 18f2550: a secondary branch, based on PIC18F2550, mostly for reference and for sentimental reasons (I started in this branch). hid a different approach to access the device on windows: it is declared as a HID and accessed with the HID.DLL

Binaries Download and CI Build

A CI build of this project runs at CloudBees:

The latest snapshot build is archived to this repository

You can download the latest snapshot build results from the snapshot repository or from the build job itself (if it is currently enabled).


Copyright (C) 2012  Holger Oehm

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <>.


eXtreme Feedback Device




No releases published
You can’t perform that action at this time.