decode.py will read SniffUSB logs of communication with
QMUX or WMC speaking devices.  It will dump the packets
in both hex and ASCII.  If you know something about the
device then you can tell it to decode the packets.  For
example, we know the Pantech UML290's WMC port speaks
WMC using Bulk Transfers, so we can:

decode.py --transfer=wmc <path to sniffusb logs>

or we know the UML290's "rmnet" port speaks raw IP in
the Bulk Transfers and QMUX in the Control Transfers, so:

decode.py --control=qmux <path to sniffusb logs>

qmiprotgen.py takes a path to an Entities.txt file and
dumps out the protocol entities and services in
Python code which is used by qmux.py.

xml2ascii.py and analyze.py dump out UsbSnoopy XML logs
but these are not as usable as the SniffUSB logs (they
do not provide good direction information).

http://www.wingmanteam.com/usbsnoopy/
http://www.pcausa.com/Utilities/UsbSnoop/