RE: [avr-gcc-list] m128 can not be programmed

[Sander Pool]

Hi Brian,

thanks for your reply. I can confirm that I have MOSI and MISO connected to
ports 2 and 3 like you correctly suggested.

Looking at your site I should have bought your board instead of trying to
re-invent the wheel :-)

Thanks,

        Sander

> -----Original Message-----
> From: address@hidden [mailto:address@hidden
> Behalf Of Brian Dean
> Sent: Saturday, December 14, 2002 8:55 PM
> To: Sander Pool
> Cc: AVR Emailing List
> Subject: Re: [avr-gcc-list] m128 can not be programmed
>
>
> On Sat, Dec 14, 2002 at 07:06:00PM -0800, Sander Pool wrote:
> > While programming (half a second or so)
> >
> > - RESET goes low
> > - SCK shows clock activity on actual m128 pin
> > - MOSI shows activity
> > - MISO seems to show activity but I'm not 100% sure
> >
> > Does anyone have any ideas on what else I can measure? This is
> my first SMD
> > double sided board that I baked myself so I had to redo some of the m128
> > pins a few times. Perhaps it overheated?
>
> Double check that MOSI and MISO from the programmer are actually
> connected to the correct pins.  I got these wrong on an early board
> that I made (Revision A of http://www.bdmicro.com/, fixed now on REV
> B).  The pinout on page 2 of the ATmega128 data sheet refers to MOSI
> and MISO as pins 12 and 13 respectively.  However, for serial
> programming, MOSI and MISO actually map to pins 2 and 3 respectively
> (PDI & PDO on Port E) (See page 300, Table 128).  Thus, the datasheet
> is confusing at best.
>
> -Brian
> --
> Brian Dean                                    address@hidden
> avr-gcc-list at http://avr1.org
>

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