Re: [partial-reconfig] FPL'02 article and V4

[Arius - Rick Collins <dsprelated@xxxxxxxxx>]

At 05:04 AM 4/25/2005, you wrote:
>Hi Rick,
>
>Actually you are right, It's just a matter of having the same routing 
>channel for every module, and it is true also that it is just a matter of 
>software limitations.
>
>In fact, it should be possible (I haven't do it) to have a modular 
>reconfigurable system without bus macros if you take the time (a lot of 
>time!!) for manually placing the routing resources in the boundary of the 
>modules, taking care of always using the same inter-module routing 
>resources. You don't need the interconnect-switch info for doing that.
>Then, for generating the bitstream you must generate two complete 
>bitstreams, and modify one by modifying the header (info in "Virtex-II 
>Platform FPGA User Guide") to convert it in a partial bitstream, (and 
>sure, erase the bitstream content not belonging to the module). I'm sure 
>that other ways for generating this bitstream should also be possible.
>
>Anyway, even if this should be possible to do, the time for manually doing 
>this makes it unfeasable, unless it could be done automatically, by 
>creating the scripts able to manage it. Something that, again, I think 
>that I won't do!! Sacrifying just some resources on bus macros remains ok 
>for me!!

I wasn't suggesting that anyone would roll their own.  I am saying that I 
don't get why the software has never supported this.  I would have to 
assume that the software is not currently capable of setting a routing 
resource as a locked feature that you then route a signal to, like you 
*can* do with any of the logic resources.  Perhaps the software could 
designate some specific routing features as locatable features that can be 
constrained like logic.  Then the software could support routing based bus 
macros rather than requiring logic be wasted for routing.




Rick Collins

rick.collins@arius.com

Arius - A Signal Processing Solutions Company  http://www.arius.com
Specializing in DSP and FPGA design            http://www.gnuarm.com
4 King Ave.                                    301-682-7772 Voice
Frederick, MD 21701-3110                       301-682-7666 FAX


___________________________
partial-reconfig mailing list
partial-reconfig@itee.uq.edu.au
Mailing List Archive : http://www.itee.uq.edu.au/~listarch/partial-reconfig/