Re: JTAG debuggers - a couple of questions

On 2005-09-28, Markus Zingg <m.zingg@xxxxxx> wrote:

> I knew that the Dongles use JTAG and software on the PC side
> to drive them etc. I probably should have (better) asked then
> if support for a specific processor in GDB also includes a
> STANDARDIZED way to access such Dongle/el cheapo solutions.

Nope.

Besides the GDB remote protocol, about the only other standard
I know about that could be used to talk to JTAG units was the
old Arm Debugging Protocol implimented by the Angle ROM monitor
as well as a couple different JTAG units (an old one from ARM
that's discontinued, and the Jeeni from EPI). Both of those
were higher-end "intelligent" interfaces.

I don't think there's ever been any sort of a standard for how
the "dumb" interfaces worked.

> After reading your reply my conclusion is that unfortunately
> this is NOT the case - yet another good reason to choose one
> of the more advanced debuggeres.
>
> I currently settle around the Abatron bdi2000 which generally
> seems to get real good critcis.

If you've got room in the budget for it, the BDI2000 is a good
product.

> I also got the impression that it's a good idea to take a
> close look at the GDB sources available and look at existing
> support for such dongles. I'm hope this will give a final
> answer on the degree of standartisation.

--
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.

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