EK-TM4C123GXL: Breakout BoosterPack / Source Code for usb_dev_cgamepad

I'm getting ready to use the Tiva Launchpad / Breakout boards for FIRST Robotics.  By downloading the firmware usb_dev_cgamepad.bin to the Tiva the combo acts like a USB HID Game Pad to the computer.  However, it would be really great to get the source code for the firmware so we could add some digital outputs.

Here is a link to the Wiki where the binary is located:

processors.wiki.ti.com/.../Using_the_Stellaris_or_Tiva_C_Series_LaunchPad_in_the_FIRST_Robotics_Competition

So... Can we get the source code for the USB HID firmware?

Thanks,

Jim