I am having a problem with the Microchip USB Framework software. I suspect
that although it pays what appears to be lip service to using ping pong
buffers, it doesn't really show the driver as being not busy to allow the
application part of the program to fill the alternate buffer.

I am having a problem working my way down the function tree, and was
wondering if anyone knew of any software that would swallow the source code,
and spit out a dependency tree that would help me sort out how the execution
flow moves between the various bits, and where the various definitions are. 
It is currently taking me an age to work my way through it.

The sort of thing I am (probably) looking for is like what generates UML
diagrams from C source code. I have seen code that does it from Java, but
not from C. and I would be looking for something that would do it from PIC C 
as used in the Microchip C30 compiler.

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