Home > Community > Forums > Custom IC Design > Is tech.db a must if I want to create a tool that scans an existing layout created by Virtuoso Layout

Email
* Required Fields

Recipients email * (separate multiple addresses with commas)

Your name *

Your email *

Message *

Contact Us

Cadence Contacts

Global Office Locator
Find Offices worldwide »

Sales Inquiry
Request for Product information »
Cadence Channel Partners »

Corporate Headquarters
Cadence Design Systems, Inc.
2655 Seely Avenue
San Jose, CA 95134
Phone: 408.943.1234
* Required Fields
First Name *

Last Name *

Email *

Company / Institution *

Comments: *

 Is tech.db a must if I want to create a tool that scans an existing layout created by Virtuoso Layout 

Last post Fri, Nov 16 2012 11:22 AM by Sahar Afara. 4 replies.
Started by Sahar Afara 16 Nov 2012 01:56 AM. Topic has 4 replies.
Page 1 of 1 (5 items)
Sort Posts:

  • Fri, Nov 16 2012 1:56 AM

    Is tech.db a must if I want to create a tool that scans an existing layout created by Virtuoso Layout Reply

     Hi,

    I am creating a tool that scans existing layout files created by Cadence 6.1.5 Virtuoso Layout to read the layout in OpenAccess. Is it a must that I have the tech.db file in order to run any application built with OpenAccess APIs ?

    • Post Points: 20

  • Fri, Nov 16 2012 3:52 AM

    Re: Is tech.db a must if I want to create a tool that scans an existing layout created by Virtuoso Layout Reply

    This is a better question for the OpenAccess forums on the Si2 website.

    Regards,

    Andrew.

    • Post Points: 20

  • Fri, Nov 16 2012 4:28 AM

    Re: Is tech.db a must if I want to create a tool that scans an existing layout created by Virtuoso Layout Reply

     Thans Andrew.

    Yes, true. 

    I wanted to know what is the difference between the cds.lib and libs.def file. I am still new to Cadence and sorry if my questions seem basic.

    • Post Points: 20

  • Fri, Nov 16 2012 5:19 AM

    Re: Is tech.db a must if I want to create a tool that scans an existing layout created by Virtuoso Layout Reply

    lib.defs is the OpenAccess standard way of describing where libraries are. It is based on the syntax of cds.lib, but only a subset of cds.lib syntax is supported. Cadence tried for some time to keep the two in sync, but nowadays we only read the cds.lib (via a special OA plugin that can also be used in other applications; this is covered in the documentation). It's possible to generate a lib.defs from cds.lib using the library path editor (both graphically and from the command line - see "cdsLibEditor -help") if you want to use an OA executable without using the cds.lib plugin.

    Regards,

    Andrew.

    • Post Points: 20

  • Fri, Nov 16 2012 11:22 AM

    Re: Is tech.db a must if I want to create a tool that scans an existing layout created by Virtuoso Layout Reply
    Thank you very much for this explanation. I got a little confused by these 2 files because I generated an OA database using str2oa from a GDS file and found lib.defs. I then received a layout of H-Bridge that I need to use for my tool that only had cds.lib and wasnt sure if my conversion example from GDS was correct (although I ahd done some small traverssals using OP APIs on it).
    • Post Points: 5
Page 1 of 1 (5 items)
Sort Posts:
Started by Sahar Afara at 16 Nov 2012 01:56 AM. Topic has 4 replies.