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How to use DRACULA DRC

At first you must prepare your design by creating a GDS2 file:
Go to the CIW-window and press File -> Export -> Stream.... Look at the following picture and modify your Stream Out dialog to your needs.

Stream Out Dialog

By saving the "Template File", this can also be done as bash command:

pipo strmout pipo.export

Next we must edit our Dracula rule file

*DESCRIPTION
  MAG-BEF-GRID=YES
  INDISK=XXX.gds2  <- Name of your GDS2 file
  PRIMARY=XXX      <- Name of the topcell
  OUTDISK=XXX.gds2 <- Name of the output GDS2 file
  PRINTFILE=XXX    <- Name of the ascii error file
  MODE=EXEC NOW
  SYSTEM=GDS2      <- Type of input
  SCALE=0.001 MICRON
  RESOLUTION=0.001 MICRON
  LISTERROR=YES
  KEEPDATA=SMART
  PROGRAM-DIR=$ECAD/
 ;  FLAG-NON45=YES
 ;  FLAG-OFFGRID=YES 0.001
 ;  FLAG-ACUTEANGLE=YES
  FLAG-SELFINTERS=YES
*END

 At last we create a directory (e.g. Dracula) an put the modified rule file in it and start dracula in a shell window by typing:

pdracula
at next you type

 /get [rule file]     Dracula reads in the rule file
 /finish

Now you must wait a moment, the following message should appear:

    ** CREATING : COMMAND FILE : jxrun.com

Now you can start the checking procedure with

 jxrun.com > tmp/dracula.log

After this you find the complete output in the new generated GDS2 file.
Read in the error file is done with the CIW-window by File -> Import -> Stream....

Stream In Dialog

Cadence will create a library with
  • one cell for each type of error (the cell name tells you the error number -> check the rules file for explanation)
  • one top cell with all errors instantiated
(The name of the error cells depends on the technology!)
Thanks to Edgar Sexauer for the template.
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