Oh boy ... I feel dumb :( I've spent hours on this, and as it turns
out, I was writing the wrong program to the chip. Well, I'm a
little bummed about the time I wasted, but then again at least the
chip is ok.
thanks
dan
--- In AVR-Chat@yahoogroups.com, "Lasse Madsen" <lasse.madsen@e...>
wrote:
> Sounds as if you have wrecked the port..
>
> Or . Have you connected the AVCC pin to the SAME voltage net as
VCC ?
>
> Regards
> Lasse Madsen
>
> _____
>
> From: dv7839 [mailto:danvernon@e...]
> Sent: 15. januar 2005 18:43
> To: AVR-Chat@yahoogroups.com
> Subject: [AVR-Chat] Question about PORTA and PORTC
>
>
> I'm very new to this, so I may not have things setup right but ...
>
> I have a STK500 with a AT90S8515. I would like to use PORTA for
> digital I/O. I setup DDRA to 0xff (all output) and wrote 0xf0 to
> PORTA. I got out my logic probe, and expected for half of the
pins
> to be high, and the other half to be low. What I found was that
> they behaved as if they were not connected. I tested some known
> values, and so I know the logic probe is working. I moved the
whole
> thing to PORTC, and had the exact same problem. Any
suggestions???
> PORTB is already in use, and works. I tried removing that portion
> of the circuit/program to isolate the problem, but it didn't
help.
> It appears to be only with PORTA and PORTC. I'm guessing there is
> something else to setup in order to "enable" PORT A/C, but I just
> can't figure it out. Any help would be GREATLY appreciated.
>
> Thanks,
> dan
>
>
>
>
>
> _____
>
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