BDI2000 Jtag interface questions...

BDI2000 Jtag interface questions...

[David Jander]

Hi,

I have heared that the BDI2000 is a must-have debugger for Embedded-PPC
development (we are developing a MPC852T based board).
Questions:
What can you do with the BDI2000 as a Jtag interface for the MPC852T?
Is it possible (i.e. is there software) to use the BDI2000 as a Jtag interface
for that processor to also do hardware testing?

Thanks,

--
David Jander


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Re: BDI2000 Jtag interface questions...

[Wolfgang Denk]

Dear David,

in message <200310141057.00186.david.jander@protonic.nl> you wrote:
>
> I have heared that the BDI2000 is a must-have debugger for Embedded-PPC
> development (we are developing a MPC852T based board).
> Questions:
> What can you do with the BDI2000 as a Jtag interface for the MPC852T?

MPC8xx processors use a BDM interface. The BDI2000 attaches  to  this
BDM port.

> Is it possible (i.e. is there software) to use the BDI2000 as a Jtag interface
> for that processor to also do hardware testing?

This depends on what you mean by "hardware testing".  Of  course  you
can  use  the  BDM interface - for example - to download and run some
test programs to test your hardware. But BDM is all you get.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
We are drowning in information but starved for knowledge.
                                         -- John Naisbitt, Megatrends

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Re: BDI2000 Jtag interface questions...

[Wolfgang Denk]

In message <3F8BD650.5020901@comcast.net> you wrote:
> He may have meant doing JTAG boundary scans.  I would think
> that if you can program flash/eproms, that there is enough
> control to do a scan.  It depends on whether the BDI allows
> address/data level control in some sort of scripting language.

No. On MPC8xx you see a BDM interface. Essentially this is a  way  to
communicate  with  the CPU, i. e. to insert instructions into the CPU
core, have them executed, and get data back.  This  way  you  can  of
course  read  and  write  memory, too, or execute a flash programming
algorithm.

You cannot do anything like a boundary scan over BDM.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
Der Dativ ist dem Genitiv sein Tod.

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