Configuration problems

Hi,

I'm new to the list, so a "Hello" to all! :-)

I created a Doxyfile for the Sonoff-Tasmota project (C/C++, 
https://github.com/arendst/Sonoff-Tasmota/raw/development/Doxyfile). 
Most of the code is not documented, yet. So I enabled EXTRACT_ALL. 
Doxygen documents only a small fraction of the code. The C-Code in my 
MPR121 driver isn't documented, too 
(https://github.com/arendst/Sonoff-Tasmota/pull/3142/commits/a01edf6fd2152f12f541cf47f4ab4afc70272a4a).

Because of the lack of documentation in Sonoff-Tasmota it is important 
to document all of the (undocumented) code with Doxygen, especially 
call- and caller graphs to understand the code flow.

Does anybody have an idea what's wrong in the Doxyfile?

Thanx for any hint,

Renne

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