Does anyone know if it's possible to use Xilinx's Impact and usb platform cable to do a
boundary scan on the 5509a? Specifically the spectrum digital TMS320VC5509a DSK board.

M Gora-

> Does anyone know if it's possible to use Xilinx's Impact and usb platform
> cable to do a boundary scan on the 5509a? Specifically the spectrum
> digital TMS320VC5509a DSK board.

It may not work because the iMPACT setup doesn't handle EMU0 and EMU1 connections.

But what's the point of a boundary scan on a DSK board?  The DSK board is a "known
good" -- it works.  JTAG is used with this board in conjunction with Code Composer
Studio (CCS) software, in order to debug run-time DSP code.  Certainly the Xilinx
tools can't be used with CCS for this purpose.

-Jeff

Well long story short I need to test the effects of a JTAG boundary scan on certain system
software that has been developed. I was hoping to have a more controlled boundary scan than
using code composer studio as I don't know exactly what it's doing when it connects to the
board.

M Gora-

> Well long story short I need to test the effects of a JTAG boundary scan on certain system
software that has been developed. I was hoping to have a more controlled boundary scan than
using code composer studio as I don't know exactly what it's doing when it connects to the
board.

You're going to run boundary scan with DSP software running, correct?  Hope not --
that's a sure recipe for disaster.  You must mean host software or other external
software connect to I/O (USB, McBSP etc).  Please clarify.

-Jeff

The software that will be running is very simple, this is rather an attempt to look at the
behavior of the DSP during a boundary scan. Specifically I am curious as to the activity of the
watchdog timer and it's ability to reset the DSP or fire an interrupt during a boundary scan.

-Mike

M Gora-

> The software that will be running is very simple, this is rather an
> attempt to look at the behavior of the DSP during a boundary scan.
> Specifically I am curious as to the activity of the watchdog timer
> and it's ability to reset the DSP or fire an interrupt during a
> boundary scan.

My understanding is that in boundary scan mode (indicated to the DSP by state of EMU0
+ EMU1 lines on the JTAG interface) no circuitry on the DSP will be running.

This could be wrong, or newer TI DSPs may act differently -- if that's the case
hopefully someone like Mike Dunn who knows more about JTAG interface than I do would
provide correct information.

-Jeff

Yes that is my understanding as well when boundary scan is done but I have not been able
to find the stated behavior anywhere in the processor specifications or elsewhere. I am just
trying to verify if this is true or not and if not test it's possibilities.