Re: [avr-chat] Can AVRDude communicate with an FT232R using the D2XX drivers instead of a VCP?

[Ing. Daniel Rozsnyó]

On 01/02/2012 06:55 PM, Joerg Wunsch wrote:
> Xiaofan Chen<address@hidden>  wrote:
>
> > > Does AVRDude have any facilities to do this? Does it already
> > > understand how to use D2XX or does it not include that
> > > functionality?
> > I do not think the mainline codes do not support d2xx. There are
> > patches though but none of them have been integrated.
> And frankly: they won't ever be.  One of the hosting requirements on
> savannah.nongnu.org is that only "free software" (in the FSF's
> terminology, and by their definition of "free software") must be
> provided there.  Linking against D2XX would not satisfy that
> condition.  (Linking against libftdi is, of course, OK, as it is free
> software by the FSF's definition.)
>
> But sorry, nobody so far taught AVRDUDE about these details.
> "avrftdi" is a bit-bang programmer using the MPSSE's native bit-bang
> mode (on top of libftdi).

Just a little bit of my know-how from yesterday - "avrftdi" is not a 
freely configurable bit-bang programmer - I wired my FT2232H module in a 
wrong way (AD/AC bus exchanged) and trying to reconfigure the pins from 
1,2,3 to 9,10,11 lead to no operation and a little error note that for 
MPSSE those must be kept 1,2,3.

The warning message and the overall behavior of avrdude seemed like it 
should go in a real bit-bang mode, but it wasn't - signals were not 
present on any of the pins of the FT module. I had to patch my board for 
the three signals coming  from MPSSE, however the BUFF and RST could be 
remapped using avrdude.conf.

Daniel