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How to open OpenAccess design in Virtuoso ??

AlhassanFattin

Dear All

i have a layout for a design made in Encounter Soc and i want to transfer it to Virtuoso using OpenAccess, can anyone help me to know after i save the design as OA in soc how to open it in Virtuoso, and what are the technology libraries that are needed to be added to the design or imported in virtuoso to make it see the design properly, as i have tried to open that design DIRECTLY in virtuoso (without adding any Technology files or anything) and the design open but nearly there is no metal layers or vias in the design !!! and there is a warning that Layer Purpose Pairs are not found !!!

can anyone help me in how to properly setup my virtuoso so as to open my OpenAccess design ??

Thanks in advance

  • Alex Soyer

    Could you pelase confirm the rules are defined in your LEFDefaultRouteSpec constraint group ?

    EDI stands for Encounter Digital Implementation.

    Thanks,

    Alex

  • eklikeroomys
    Alex, I ran verify-->Geometry, with many error results, how do I fix this?
  • eklikeroomys
    I confirm that the minimum spacings for via and metal layers are defined in the LefDefaultRouteSpec constraint group.
  • Alex Soyer

    You should check after Nanoroute which should report the problem but I suspect a problem in your techfile.

    Please check the warning when you start Encounter and when you Import/restore the design.

    Could you check if you have a .oalefxxxxx directory or file which contains the LEF whic is going to be used by Nanoroute?

    You could check as well the warning before Nanoroute and the violations reported by Nanoroute after the routing.

    Thanks,

    Alex

  • eklikeroomys
    Halo Alex, I have fixed the errors and the design is now correct with no errors. I need your help with one more thing, I want to use an OA netlist instead of a Verilog netlist for my design. I ran the setOaxMode command, but when I use an OA netlist instead of a Verilog netlist, I get the following errors: **ERROR: (SOCLF-116): Pitch of layer 'MET1' is 0. **ERROR: (SOCLF-3): Error found when processing LEF file. I dont know why this happens, since the library containing the OA netlist is attached to the correct reference library. (I am using an OA schematic as a netlist, is this correct?) Thank you, Chris
  • Alex Soyer

    Chris,

    Please make sure in the OA reference library teh first library contains the technology information (the design lib if attached or reference to the baseTech library).

    In order to debug the problem you could look at the .oalefxxxx file generated in your working directory.

    Thanks,

    Alex

  • eklikeroomys
    Thank you Alex, may I ask where can I find the commands for Encounter, like the setOaxMode command? Are they all in the help files?
  • Alex Soyer

    Chris,

     Yes it is, please look at the "Encounter Text Command Reference".

    Around page 180.

    Thanks,
    Alex

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