OK, I have finally resolved this problem. I had to create a custom IP, which
I called dcr_plug. It simply connects to the DCR master on one side and
exposes the same pins on the other side. This made the tool happy... So, now
I have the DCR bus in my top level design and I can do anything I want with
it!

/Mikhail


"MM" <mbmsv@yahoo.com> wrote in message
news:47c2naFei2s4U1@individual.net...
> Dear EDK experts,
>
> Here I am again with an EDK problem... I have a top level ISE design and
an
> EDK submodule (PPC). I am trying to bring a DCR bus out from the EDK
> submodule into the top level ISE design. Since I want this bus to be in
the
> normal address space I added the opb2dcr_bridge to my design. I assigned
the
> DCR master side of bridge to the external ports of the EDK submodule. All
of
> this seems fine, but it doesn't work... I can't see any activity on the
DCR
> bus when looking with the Chipscope except for I know that the clock is
> present... What am I missing?
>
> One thing I noticed is that in the Bus Interface View the bridge shows as
> not connected on the DCR master side... I tried adding a DCR bus,
connecting
> the bridge to it and bringing this bus to external ports instead of the
> bridge's pins directly, however the EDK then would complain that there
were
> no slaves on that bus... The only connections it would allow to that bus
in
> the Bus Interface View are to the ppc405_0 and, I believe,
> plb2opb_bridge_0...
>
> Has anyone been through this?
>
> Thanks,
> /Mikhail
>
>

Dear EDK experts,

Here I am again with an EDK problem... I have a top level ISE design and an
EDK submodule (PPC). I am trying to bring a DCR bus out from the EDK
submodule into the top level ISE design. Since I want this bus to be in the
normal address space I added the opb2dcr_bridge to my design. I assigned the
DCR master side of bridge to the external ports of the EDK submodule. All of
this seems fine, but it doesn't work... I can't see any activity on the DCR
bus when looking with the Chipscope except for I know that the clock is
present... What am I missing?

One thing I noticed is that in the Bus Interface View the bridge shows as
not connected on the DCR master side... I tried adding a DCR bus, connecting
the bridge to it and bringing this bus to external ports instead of the
bridge's pins directly, however the EDK then would complain that there were
no slaves on that bus... The only connections it would allow to that bus in
the Bus Interface View are to the ppc405_0 and, I believe,
plb2opb_bridge_0...

Has anyone been through this?

Thanks,
/Mikhail