Novice question

[RI]

Hi all,

I use Icarus Verilog version 0.8.6 and GTKWave Analyzer v3.1.13 on
Linux.
By the example design attached to gtkwave I try to re-compile it in an
empty directory where the only des.v exists:

iverilog -o des.tmp des.v
vvp des.tmp
vcd2vzt des.vcd des.vzt
gtkwave -o -t des.stems des.vzt des.sav

I don't know where the *sav file comes from. Icarus doesn't seem to
generate it, but gtkwave expects it. I have unsuccessfully hunted both
mans to see what is this file is for.
Will you help me to start, please?

Istvan

 

[Muzaffer Kal]

On Sun, 14 Dec 2008 06:29:33 -0800 (PST), RI <i.retaller@evoran.hu>
wrote:

Hi all,

I use Icarus Verilog version 0.8.6 and GTKWave Analyzer v3.1.13 on
Linux.
By the example design attached to gtkwave I try to re-compile it in an
empty directory where the only des.v exists:

iverilog -o des.tmp des.v
vvp des.tmp
vcd2vzt des.vcd des.vzt
gtkwave -o -t des.stems des.vzt des.sav

I don't know where the *sav file comes from. Icarus doesn't seem to
generate it, but gtkwave expects it. I have unsuccessfully hunted both
mans to see what is this file is for.
Will you help me to start, please?

Istvan

The .sav file is where the waveforms you want to observe in gtkwave to
be stored. It's not necessary to start gtkwave but you will get all
your previous waveforms displayed if you do give it instead of having
to add them all again. You can generate it from gtkwave.

Muzaffer Kal

DSPIA INC.
ASIC/FPGA Design Services
http://www.dspia.com