Stats

  • Locked Locked
  • Replies 3
  • Subscribers 125
  • Views 17911
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Importing a def file (made in encounter) into virtuoso.

Mikutine

Dear users,

I've made a design in Encounter with the Nangate OpenCell Library. Everything is placed and routed, and I have extracted the def file.

I want to use that def file, so I can import it in Virtuoso, because I have to add some shape pins in there. The first thing I did, is make an new library, where I attached the technology file from the FreePDK45 of Nangate.

When I want to import the def file in Virtuoso, I fill in the following in the Virtuoso DEF In form:

-DEFin File Name: "the path to the def file"

-Target Library Name: "the new library that I've made with the attached technology file

-Ref. Technology Libraries: "the nangate opencell library"

-Target Cell Name: "the name of cell''

-Target View Name: "the name of layout" 

I get the following errors:

'The library "router_lib" is already attached to technology library "NCSU_TechLib_FreePDK45". Cannot replace this with a derived technology database unless the original attached technology library is part of the new references. defin translations has failed'

So it basically says that the attached technology file to the new library, and the ref. technology library are conflicting. But when I try to import it without one of these two libraries/technology file, I get some missing information about via's.

Can somebody explain me how I can fix this? Thank you in advance! 

Parents
  • I tried to do what you've said, to make a new library with attaching the technology library 'NCSU_TechLib_FreePDK45' and then import the LEF file with only the via information. Well, I did that, and I get the following errors: 'Constraint validRoutingVias does not match the referenced technology database'. I get a bunch of these errors. Only for different vias. I tried a couple of other things. Like making libraries with the 'NCSU_TechLib_FreePDK45' as the technology file. And when I try to import this def file, I get errors that some siteDEF was not found. This seems logical as I made that design with the standard cell library. When importing this design, I think it should have some reference to that library. Another error was: A matching via rule Via#Array-0 is used for this via since there is no via rule specified. It seems as there are no rules specified for the via GENERATE where the rules for the arrays are. The other thing I tried is making a library with the 'NangateOpenCellLibrary' as the attached technology file. This library I've used to synthesize, place&route the design. Here I don't get the siteDEF errors, but I do get the Via#Array errors. I'm really stuck now, so I hope somebody can help me. Thank you in advance!
Reply
  • I tried to do what you've said, to make a new library with attaching the technology library 'NCSU_TechLib_FreePDK45' and then import the LEF file with only the via information. Well, I did that, and I get the following errors: 'Constraint validRoutingVias does not match the referenced technology database'. I get a bunch of these errors. Only for different vias. I tried a couple of other things. Like making libraries with the 'NCSU_TechLib_FreePDK45' as the technology file. And when I try to import this def file, I get errors that some siteDEF was not found. This seems logical as I made that design with the standard cell library. When importing this design, I think it should have some reference to that library. Another error was: A matching via rule Via#Array-0 is used for this via since there is no via rule specified. It seems as there are no rules specified for the via GENERATE where the rules for the arrays are. The other thing I tried is making a library with the 'NangateOpenCellLibrary' as the attached technology file. This library I've used to synthesize, place&route the design. Here I don't get the siteDEF errors, but I do get the Via#Array errors. I'm really stuck now, so I hope somebody can help me. Thank you in advance!
Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.