Re: [flashrom] Rayer_SPI and xilinx buffered dlc5 cable

[Stefan Tauner]

On Tue, 26 Feb 2013 11:55:44 +1100
Andrew Tarabaras  wrote:
> Hi,
>
> Just a heads up that the rayer_spi module wont work with a buffered xilinx
> DLC cable. There is a pull down buffer in the MISO ( Data In ) line which
> is enabled when pin 6 of the parallel port is pulled low.
>
> I dont have time to be submitting patches, fix it or not I dont mind.
>
> These are the changes I made.
> […]
>
> Cheers, hope it will help stop someone else spending hours debugging
> something that doesn't work.

Hm, I wonder if it ever worked. The original patch was sent to us by
Jakab Peter in 2010. Jakab: do you remember flashrom? :) As far as I
can see the official documentation of the xilinx cable always mentions
the buffer. Do you have a cheap clone or a very old version of the
original cable? Eventually I would like to know if pin6 of the printer
port is connected to anything in your cable. If not (or if it is even
equal to the buffered version and you just forgot to mention that
change) we could just disable the pull down by default on the xilinx
type and remove the need for another type.

Rayer_SPI and xilinx buffered dlc5 cable

[Andrew Tarabaras]

Pin 6 is connected as in this circuit

http://dev.ivanov.eu/uploads/images/dlc5/dlc5_schematic3.png

I think it's been fixed now. I remember being asked to test it a while ago
after some changes to the code and it worked.

Cheers
Andrew tarabaras

On Thursday, 29 August 2013, Stefan Tauner wrote:
> On Tue, 26 Feb 2013 11:55:44 +1100
> Andrew Tarabaras <[e-mail] javascript:;> wrote:
> > Hi,
> >
> > Just a heads up that the rayer_spi module wont work with a buffered
>
> xilinx
> > DLC cable. There is a pull down buffer in the MISO ( Data In ) line which
> > is enabled when pin 6 of the parallel port is pulled low.
> >
> > I dont have time to be submitting patches, fix it or not I dont mind.
> >
> > These are the changes I made.
> > […]
> >
> > Cheers, hope it will help stop someone else spending hours debugging
> > something that doesn't work.
>
> Hm, I wonder if it ever worked. The original patch was sent to us by
> Jakab Peter in 2010. Jakab: do you remember flashrom? :) As far as I
> can see the official documentation of the xilinx cable always mentions
> the buffer. Do you have a cheap clone or a very old version of the
> original cable? Eventually I would like to know if pin6 of the printer
> port is connected to anything in your cable. If not (or if it is even
> equal to the buffered version and you just forgot to mention that
> change) we could just disable the pull down by default on the xilinx
> type and remove the need for another type.
> --
> Kind regards/Mit freundlichen Grüßen, Stefan Tauner