[uracoli-devel] new board abstraction scheme

[uracolix]

Yesterday I did check in the new board abstraction scheme. 

Now all MetaInformation needed by avr-gcc, like mmcu and F_CPU 
is collected in the file Src/Lib/Inc/boards/board.cfg.

This file is read from the top level SConstruct file.

If you want to add a new board, just add a the new section or an alias inside 
an existing section in this file and write/modify the corresponding 
boards/board_xxx.h file.

The next run of scons will be able to build the new target.

A documentation will follow.

Cheers, Axel