Re: [Xc3sprog-users] Programming XCFxxP flash PROMs

[Uwe B. <bo...@el...>]

>>>>> "Joris" == Joris van Rantwijk <jo...@sr...> writes:

    Joris> Hello, I just submitted a patch to support Xilinx XCFxxP series
    Joris> flash PROMs.  It seems to work but it has only been tested with
    Joris> XCF32P, so it should be considered experimental. I'm planning to
    Joris> look at Virtex 5 as well, but I have no idea what will come out
    Joris> of that.

I checked in you patches. Please check that I got everything right. I would
appreciate if you add a copyright header with your name at least in the
progalgxcfp files.

    Joris> I noticed that programming big files is quite slow (20 minutes
    Joris> for a 20 Mbit image). I'm using a Xilinx DLC10 USB programmer.

What are Impact programming times?

Xc3sprog used the reversed engineered devices handling from ixo.de. Perhaps
impact uses not-yet documented APIs for those big chunks. Can you perhaps
send some log like the Linux usbmon api delivers?

    Joris> What is currently the fastest cable type for xc3sprog?

The FT2232H is quite fast and can be used for fast communication with a PC
too, look at the ftdi_stream.c code in libftdi-1.0. I use it on several
boards.
At present xc3sprog is very conservative with JTAG speed, but for an
on-board JTAG adapter the fast data rate of the FT2232H (5 up to 30 MBaud)
would improve speed. If the JTAG dongle is external and connected with
flying wires, speed has to be substantial slower (i.m.h.o.) as with an
om-board adapter.

A good approach should have some concept of JTAG speed with sensible
defaults and not hard code as ioftdi.cpp  at present.

Also asynchronous libftdi-read would improve read speed for big chunks.

    Joris> Also, I'd like to mention again that the Xilinx Parallel Cable
    Joris> III still does not work for me. It says "Missing power for
    Joris> Parallel Cable III".

Remote debugging hardware is hard. We have to single step throught the
ioparport code and measure the voltage level at relevant program steps and
decide where the algorithme is wrong.

I also don't have at hand if your setup is with a genuine DLC5 or some
clone.

-- 
Uwe Bonnes                bo...@el...

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
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