Re: [avrdude-dev] PDI capable bitbang programmers?

[Ing. Daniel Rozsnyó]

On 05/05/2013 10:42 AM, Joerg Wunsch wrote:
> As "Ing. Daniel Rozsnyó" wrote:
>
> >     Is there any FTDI based big-bang code (Win or Linux), or I will
> > have to buy a AVR Dragon which has PDI ?
>
> See the other thread on avr-chat: it's not even quite sure whether the
> Dragon will handle the ATxmega*A*U with PDI.  So better head for a
> JTAGICE3 instead.
>
> I've heard the TPI and PDI physical protocols are quite similar, so in
> theory, it might be possible to reuse the existing AVRDUDE bitbang TPI
> implementations, but I don't think anyone has already started such a
> project by now.


I have started to compare TPI and PDI - seems very similar. The TPI has 
a dedicated reset wire, so PDI looks like a subset of TPI, with no 
modification required.

I saw a recent post about TPI - will give it a try, at least I have the 
FTDI mentioned there so I can experiment.

Daniel