Re: [partial-reconfig] Reconfiguring columns that have active signals

[Jonathan Jung <jwjung@xxxxxxxxxxxxx>]

Hi Ivan,

Yes, now that I've gotten that part of my project working (hw accel),  
I've moved over to this list in order to try and get Partial reconfig  
to work.  Unfortunately, I don't have any control over where the  
traces were laid out on this eval board, so I have no choice but to  
have the serial and reset wires go through the reconfigurable  
module.  I only have 1 reconfigurable module, so my hope is that when  
reconfiguring the system, serial data just won't flow.

I know you read the reconfiguration data from the onboard flash,  
however I'll probably have to use the JTAG port to program from a  
computer  (initial config is handled by ace file) because I don't  
have flash nor pins connected to the selector switches (unless I  
modify the board).

>Fortunately VirtexII makes a ROC (Reset on configuration) during  
the initial
>configuration that resets the SCP and makes possible to run the  
application
>without an external reset button.

Indeed, I've never even made use of the reset button for my  
Microblaze system.

>From my experience is not a good idea to pass peripherals pins from  
one area to
>another through very long lines that cross the whole FPGA. I had  
many problems
>with those long paths.

"All" it would take is me reworking the board to have the 3 pins on  
the other side ;)  But I have to work with what I have.

Jonathan

On Mar 3, 2006, at 2:28 AM, Ivan wrote:

> Hi Jonathan,
>
> I remember that I was talking with you about that in the
> MicroBlaze-uCLinux mailing list ;)
>
> About your question, it is posible to cross the boundaries using  
> BM, as
> you proposed for your reset and serial port. However, I remember some
> problems with that, during the reconfiguration process. In the last
> conference where I was, some research works reported something similar
> when they have 2 or more dynamic areas. It is not possible the
> communication with the second dynamic area if you are reconfiguring  
> the
> first one.
>
> I am not sure about that, because in my work I only had one dynamic
> area, and all pins used by the processors were in the fixed module.
>
> Regards,
>
> Ivan
___________________________
partial-reconfig mailing list
partial-reconfig@xxxxxxxxxxxxxx
Mailing List Archive : http://www.itee.uq.edu.au/~listarch/partial-reconfig/