Re: [Xc3sprog-users] How hard is it to port a cable driver from urjtag or openocd to xc3sprog?

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

>>>>> "Dan" == Dan Egnor <eg...@of...> writes:

    Dan> In particular, I'm thinking about porting the jlink driver, which
    Dan> is supported by urjtag and openocd.

    Dan> Naively, it looks relatively simple, but I'm not sure if there are
    Dan> hidden gotchas to know about before I start.  I am familiar with
    Dan> libusb and all that jazz so I know what I'm getting into there.

It depends on the intrinsics the dongle supports. If you can match the
intriscics with the basic capabilities found in iobase.h all is fine. If the
dongle is "intelligent" and only knows higher level intrinsics, porting will
be hard. 

E.g. I looked at the versaloon dongle. The dongle is intelligent and after
some starring at the code and wondering how it can be done, I gave up for
now.

I intend to extend the blackmagicdebug firmware
http://sourceforge.net/projects/blackmagicdebug/
for the JTAG primitives some times, so I have a dongle usefull for ARM and
other Jtags purpose. But this is part of a much greater USB stack effort I
have in mind: Connect LUFA with Ethernut and extend LUFA for STM32. But
don't holed yout breath...

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

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
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