AVR-Chat

Ok, thanks Zack, i am using a programmer called Ser2conmini, its uses Com
port control  and data signals, i made it myself
The configuration bits are configured ok, the cpu runs, but only with an
external power source connected to the rst line. If i just plug the
programmer to my target board it begins o run, but as i disconnect it, it
halts. Same happens if i do not plug the isp at all. I think it has
something to do with RST
-----Mensaje original-----
De: Zack Widup [mailto:w9sz@prairienet.org]
Enviado el: Jueves, 03 de Febrero de 2005 11:13 a.m.
Para: AVR-Chat@yahoogroups.com
Asunto: Re: [AVR-Chat] Re: Bootup/reset very big problem


On Thu, 3 Feb 2005, Stefan Trethan wrote:

>
> On Thu, 3 Feb 2005 09:43:51 -0300, Javier Fiasche <jfiasche@tutopia.com>
> wrote:
>
> >
> >
> > I have:
> >
> >             all vcc pins 5.05v
> >             rst pin      4.89 v
> >  and the device is at mega32l
> >
> > javier
> >
>
> then there is some other fault.
> Maybe the programmer you use doesn't change reset after all, but maybe it
> has pullups or something that cause other signals to work only if it is
> connected.
>
> ST
>

Hi Javier,

What programmer are you using?

The one thing I had trouble with at first with my STK-500 was getting used
to setting the configuration bits for the oscillator.  For some reason it
started out with default settings and if I toggled between the config
window and the program window with AVR Studio, it reset my config bits to
default.  Or at least that's what I think happened.  That was with my
first few programming attempts, which didn't work until I got the config
bits set exactly the way I wanted them.  Then everything was fine.

But the configuration bits have to be set correctly for the type of
oscillator you're using, or your programmed AVR will just sit there like a
stone. That's pretty frustrating!

Zack



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