Re: gEDA-user: [OT] vcd file format description

["Udi Finkelstein" <geda@xxxxxxxx>]

VCD stands for "Value Change Dump"

http://www-ee.eng.hawaii.edu/~msmith/ASICs/HTML/Verilog/LRM/HTML/15/ch15.2.htm

Udi

On 7/2/07, Werner Hoch <werner.ho@xxxxxx> wrote:

Hi Karl and all,

On Thursday 28 June 2007 22:12, Karl. wrote:
> On Thu, Jun 28, 2007 at 07:59:19PM +0200, Werner Hoch wrote:
> > gtkwave can read vcd files. The file format looks pretty easy but I
> > haven't found a file format description for it.
>
> I started looking at this for use with gwave, but ended up just using
> plain ascii like this:
>
> t b0 b1 b2 b3 b4 b5 b6 b7
> 0.000000 1 1 1 1 1 1 1 1
> 2.449132 1 1 1 1 1 1 1 1
> 2.449219 0 0 0 0 0 0 0 0
> 2.622049 0 0 0 0 0 0 0 0
> 2.622135 0 0 0 0 0 0 0 1

That looks good, too.

> I've misplaced the info I saved for vcd file format, but this looks
> like a productive google search: vcd value-change-dump

Unfortunatly I didn't know what vcd stands for. And searching for vcd
gave me a lot of video cd stuff. Searching for value change dump works
great.

Regards
Werner




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