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Re: display of vcd dump files in electric

From: Ralf Derscheid
Subject: Re: display of vcd dump files in electric
Date: Mon, 7 May 2007 10:44:20 +0200
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de-AT; rv: Gecko/20070222 SeaMonkey/1.1.1

Dear Steven,

as mentioned before I highly appreciate that someone is spending
his precious time to code such things.

I will send a small example immediately.

Just one simple question in advance:

 I'm preprocessing my standard vcd files to make your tool
 capable of reading it.

 Do you accept any signal definition in addition to

        $var wire 1 #! my_signal $end


Verilog & Modelsim use the statement input and output and the vcd spec mentiones
   much more like supply0 / supply 1.

How can I distinguish the value "z" from the value "x" in the graphical display ?

"1" is a top line, "0" is a bottom line, "x" and "z" are both a rectangular filled box. (all signals are red).

Best regards & thanks a lot



Please feel free to raise any question related to VCD or VCDE to me, as I'm used to work with these
files every day ;-)

Steven Rubin schrieb:

I highly appreciate that you have coded this nice tool,
as it allows me to show customers some diagrams without
requesting them to dive through endless listings.

I could manage to convert a standard vcd file from verilog or modelsim
to be read into electric, but I could not manage to view the states Z or z
and maybe resistive 1 or resistive 0.

Just a sample dump file holding the slang used to do this would be fine.

The Electric VCD reader for Verilog output handles just 4 states: 0, 1, X, and Z. It does not handle "resistive 1" or "resistive 0". I am unfamiliar with VCD file syntax for those states. If you have a SMALL example file, please send it to me.

   -Steven Rubin


  NEC Electronics (Europe) GmbH

Ralf Derscheid Expert Assistant Manager Marketing Asic Solutions Industrial & Distribution Business Unit

  Arcadiastrasse 10     Tel. +49-211-6503-1380
  D-40472 Duesseldorf   Fax. +49-211-6503-6380

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ;-)

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