On Mon, 2010-10-11 at 03:23 +0200, Tomek CEDRO wrote:
> Hello David, nice to hear from you! :-)

> 
> I am working on it - preferably FT2232 (KT-LINK) first, then RLink
> (Stm32Primer2).. but RLink can be more accessible on the STM32Primer2
> boards.. and also needs some reverse engineering on the protocol.
> Which one of them do you think should be made working first to help
> SWD development and make it more accessible at the moment?

No opinion.  Pick one, see what users you pick up.  Then the other... :)

> 
> 
> > The debug adapter drivers can provide a simple SWD driver
> > struct with methods that kick in as needed (instead of JTAG).
> > So far just one adapter driver has been updated (not yet
> > ready to use or circulate).
> 
> Do you mean to initialize the adapter or to perform all SWD operations?

I plan to circulate that driver code when both of those work.

> 
> 
> > The biggest issues are probably
> >  - fault handling, where the ARM Debug Interface V5 pipelining
> >    needs work in both JTAG and SWD modes and
> 
> JTAG and SWD have their own ways of detecting/quering errors, but the
> sticky-bits part seems to be in fact similar, so maybe one error
> handling system could cover both JTAG and SWD..?

That'd be best, and is mostly the model I followed when coming up with
the ADI-v5 DAP interface.  Whether it can really work is another issue.

- Dave


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