Home Specman / e The Easy Way To Start Using OVM-e Sequences

Search

The Easy Way To Start Using OVM-e Sequences PDF Print E-mail
User Rating: / 2
PoorBest 
Thursday, 24 December 2009 15:41

Industry-standard methodologies are great, really. It would be so nice if our entire verification environment (VE) were OVM-e (eRM) compliant, wouldn’t it? But what if there are legacy components in our env that don’t follow any specific methodology and we still want to make them speak OVM-e?

 

What we often want to do is take our legacy driver and monitor (or whatever TCMs that provide this functionality) and make them a nice self-contained Interface eVC with a Sequence mechanism and all that stuff. Now the good news is that usually this is not a big problem. So here are Think Verification’s 5 easy steps to start using sequences in your env:

1. Redefine your transaction - go back to your original transaction definition and make it inherit from any_sequence_item.

2. Get hold of another eVC that’s good for your application and extract its skeleton (delete all protocol-specific code but leave all units, struct method headers, interconnection). Alternatively, use a script such as vBuilder to build a skeleton for you. Think Verification strongly recommends changing all file and struct names to be consistent and add a unique prefix to all objects and types (very useful, also required by eRM rules). A small perl utility can help, try this.

3. Fill your monitor unit with protocol-specific content (e.g. implement the while TRUE loop in the main tcm).

4. Fill your BFM unit with protocol-specific content (e.g. implement the drive_transaction tcm).

5. Prepare a sample test file which extends the MAIN sequence and generates one or more items to test your new eVC.

And one final tip for writing new eVCs - Always have a known-to-be-good eVC nearby as reference!

Voila! Now you have a new eVC and you can send your legacy componets away to the National Museum of Verification History. It’s now time to develop your Sequence Library. Happy Sequencing!

 

 
More articles :

» Is ABV Becoming Mainstream?

Is Assertion-Based Verification (ABV) becoming mainstream? This question popped up today at Mentor’s ABV . Assertions in general and ABV in particular make another approach that you can use to verify your design. Usually ABV alone is not...

» Don't Be SYSsy

Anyone who’s ever worked with me knows that I have several weaknesses. One of them is extra sensitivity to things that reside under sys (global.sys) in Specman/e. If this is Chinese to you then you’re probably a SystemVerilog guy: "sys" is the...

» How To Choose Your Verification Service Provider

If you’re looking for an outsourcing solution for your verification problem then a quick look around will tell you that there are many alternatives out there. The number of verification contractors has grown rapidly over the recent years and today...

» Packing In OVM-e

This example shows how to pack a struct into a list of Double Words (32 bit) keeping the original order. This time we got less talking, and more code:

» UVM Users: Here Are Some Great Tips [Video]

A couple of years ago I wrote here about how the UVM was becoming the next big thing in the verification world.And guess what? I was right. Not that it was too hard to predict... but anyway, the industry has finally standardized on language (SV) and...

Add comment


Security code
Refresh

Copyright © 2018 Think Verification - Tips & Insights on ASIC Verification. All Rights Reserved.
Joomla! is Free Software released under the GNU/GPL License.