Hi there, a question about VPR:
If I have the output of the placement and the routing, how can I see them on screen without having to recompute it all?
Thanks!!
- posted
20 years ago
Showing design in vpr
Loading thread data ...
- Vote on answer
- posted
20 years ago
Unfortunately, you can't just display an existing routing in VPR. The best you can do is read the placement back in, re-route it, and then look at it.
Use
-route_only -route_chan_width
to skip placement, and route only at one channel width. If you used a binary search to find the minimum channel width in your first run, you'll have to remember what the minimum channel width was if you want to route again at that width (or that width +20%, which is commonly done).
This will be quite a lot faster than re-placing and re-doing a binary search, but not as fast as just reading the routing back in from the .r file. That would be a handy feature, but I never got around to writing it before I graduated.
Regards,
Vaughn Altera