3 Replies Latest reply on Nov 28, 2011 1:29 PM by samantha_lizak

    lef2gds conversion

    inderjeet.kaur

      I need to convert some lef files to gds. Is there any utlity available for it?

        • 1. Re: lef2gds conversion
          samantha_lizak

          Yes, you can use fdi2gds.  (Also, most Calibre tools in the last year or two have added native LEF/DEF support.  (Calibre xRC has had native LEF/DEF support since 2006 or so.))

           

          fdi2gds is documented in "Translate Third-Party Layout Databases" in the Calibre Verification User's Manual.  It lists  the supported LEF/DEF versions and any restrictions; this does change, so be sure the manual version matches the version of Calibre you are using.

           

          Regards-

           

          Sam.

          • 2. Re: lef2gds conversion
            inderjeet.kaur

            I tried running fdi2gds by using option -system LEFDEF but it dies out looking for OA libs :

             

            //ERROR: Unable to load OA libraries

            • 3. Re: lef2gds conversion
              samantha_lizak

              Hi Inderjeet-

               

              What was the command you used?  Does your input have OA files as macros?  And what version of Calibre is this for?

               

              I asked around, and it seems hierarchical LEF/DEF wasn't supported until version 2011.3 (that's this summer's release -- your company may not have updated to it yet).  If you are using a version that only handles flat LEF/DEF and you have hierarchical input, the workaround our AEs use is to individually flatten each child, open the parent in DESIGNrev, and then save as GDS.

               

              If the input is a flat LEF/DEF (or at least does not contain OA macros) and you are getting the error message about libraries, you may have a switch that shouldn't be there, such as -design (only required with OA and Milkyway); or an environment variable such as MGC_CALIBRE_DB_READ_OPTIONS.

               

              Hope this helps-

               

              Sam.