[Tinyos-help] getting to grips with PORTC on AVRs

[Mirko Bordignon]

Hi there,

briefly speaking: I successfully ported TinyOS-2.x to a generic  
AtMega128 dev board (mainly recycling and adjusting mica-family  
code), on which I can successfully run all the test applications,  
from Blink to TestSerial etc etc (believe me that there are no  
problems in that sense, everything is there up and running).

What is strange, and I wonder if anybody does have any hint, is that  
I cannot properly use PORTC as an output port: nor using it with the  
GeneralIO interface and related components, neither manually setting  
DDRC and PORTC I can get high logic values on any of its pins, while  
both these two methods -let's say the elegant, proper way and the  
debug one- work flawlessy on the other ports.

What is even more strange is that, inspecting DDRC and PORTC values  
via debugging, they pretend to be set respectively to output mode and  
to high while a multimeter easily reveals they're not (or at least  
that the output value is low); I double checked the hardware, in fact  
just compiling and uploading a 5 lines C code which just sets high  
ouput values on port C (tinkering with the usual DDRC and PORTC) gets  
the job done, so it is totally a tinyos related trouble. Any idea?

thanks

Mirko Bordignon
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