# \[ANN\] Ruby-VPI 14.0.0

**URL:** <https://www.ruby-forum.com/t/ann-ruby-vpi-14-0-0/80849>\
**Category:** Ruby\
**Created:** [December 31, 2006, 5:28am UTC](https://www.ruby-forum.com/t/ann-ruby-vpi-14-0-0/80849 "2006-12-31T05:28:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![snk](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d9b06d/32.png) [@snk](https://www.ruby-forum.com/u/snk)\
**Post date:** [December 31, 2006, 5:28am UTC](https://www.ruby-forum.com/t/ann-ruby-vpi-14-0-0/80849/1 "2006-12-31T05:28:56Z")

</div>

Ruby-VPI is a Ruby interface to IEEE 1364-2005 Verilog VPI.  
It lets you create complex Verilog test benches easily and  
wholly in Ruby.

• [http://ruby-vpi.rubyforge.org](http://ruby-vpi.rubyforge.org)

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Version 14.0.0 (2006-12-30)

Summary

This release adds support for simulation callbacks, renders  
Verilog benches fully simplified, and revises the user  
manual to reflect major changes.

Notice

• The Vpi::relay\_verilog method has been replaced by  
Vpi::simulate.

```
Please update you tests accordingly, because invoking
the Vpi::relay_verilog method directly will cause your
tests to freeze/hang.

```

• Verilog benches no longer contain any clock generation  
code. They are now mere skeletons, whose only purpose  
is to instantiate the design under test.

```
The clock generation code is now contained in the Ruby
bench.

```

New features

• The RubyVpi::init\_bench method now gives you complete  
control over performing a clock/operation/whatever  
cycle for your design. This feature allows you to work  
with multi-clocked designs.

• Callbacks are now supported through the  
Vpi::vpi\_register\_cb method. See the callbacks section  
in the user manual for details.

• Added the Vpi::advance\_time method, which makes the  
Verilog simulator simulate a given number of time  
steps.

• Added the Vpi::simulation\_time method, which gives you  
the current simulation time as a 64-bit integer.

Details

• Removed the monkey patch for the SWIG va\_list  
problem—it no longer occurs.

• Cleansed the appearance of the user documentation.  
â–¡ Added indices to section headings, just like LaTeX.  
â–¡ Admonition boxes no longer interfere with  
surrounding text, and they don’t have big gap above  
them.  
â–¡ Navigation menu is now elastic (fluid layout).

• Revised the user manual and added new content.  
□ Moved “VPI utility layer” section from background  
chapter into usage chapter in user manual.  
â–¡ Added a nice introduction to entire manual with  
links to reference documentation.