Hi
I want to debug a custom board with no interface for data exchange.
The requirement is PC based autometic test pattern generation and real
time data exchange from FPGA based hardware.

I chanced to see an article in Xcell Journal of  2nd quarter 2005,
titled: "Using the JTAG Interface as a General-Purpose Communication
Port"--- but couldn't find any thing from the link given in the
article.

How can I get GNAT tool as described in that article.

Or

Any other suggestion to use JTAG of Xilinx FPGA as general purpose I/
O.


regards
MH

On 22 Mai, 11:15, mh <moazzamhuss...@gmail.com> wrote:
> Hi
> I want to debug a custom board with no interface for data exchange.
> The requirement is PC based autometic test pattern generation and real
> time data exchange from FPGA based hardware.
>
> I chanced to see an article in Xcell Journal of  2nd quarter 2005,
> titled: "Using the JTAG Interface as a General-Purpose Communication
> Port"--- but couldn't find any thing from the link given in the
> article.
>
> How can I get GNAT tool as described in that article.
>
> Or
>
> Any other suggestion to use JTAG of Xilinx FPGA as general purpose I/
> O.
>
> regards
> MH

just connect your logic to BSCAN and implement anything you need.

BSCAN "redirects" USERx JTAG instructions for custom implementation in
the FPGA fabric.
just look in IP cores that use this, like the OPB_MDM, etc..

Antti

On May 22, 12:15 pm, mh <moazzamhuss...@gmail.com> wrote:
> Hi
> I want to debug a custom board with no interface for data exchange.
> The requirement is PC based autometic test pattern generation and real
> time data exchange from FPGA based hardware.
>
> I chanced to see an article in Xcell Journal of  2nd quarter 2005,
> titled: "Using the JTAG Interface as a General-Purpose Communication
> Port"--- but couldn't find any thing from the link given in the
> article.
>
> How can I get GNAT tool as described in that article.
>
> Or
>
> Any other suggestion to use JTAG of Xilinx FPGA as general purpose I/
> O.
>
> regards
> MH

If it's enough to monitor and control fpga pins by JTAG you can try
Scanseer tool -- http://www.scanseer.com.

-- SK