Hi,
I use my own design (architecture like due with ATSAM3X8E). I would like to use JTAG pins PB28 to PB31 as digital outputs. I can't get there so far. if anyone has an idea to help me... thanks in advance.
David.
What are you doing now?
Are you trying to use bare-hardware IO, or trying to access them via the Arduino functions?
Huh. The data sheet says quite clearly:
SWJ-DP pins can be used as standard I/Os to provide users with more general input/output pins when the debug port is not needed in the end application. Mode selection between SWJ-DP mode (System IO mode) and general IO mode is performed through the AHB Matrix Special Function Registers (MATRIX_SFR). Configuration of the pad for pull-up, triggers, debouncing and glitch filters is possible regardless of the mode.
And then the supposed MATRIX_SFR register(s) are never mentioned again (in datasheet or in .h files.) 
thank you for reply.
I've seen this problem before, that's why I'm asking here...
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