VCD file generation

[sunil]

HI,
I want to generate VCD file for my VHDL file. I am using modelsim
5.6f. If anybody knows the commands which we have to run to get VCD
file please mail those.
thanking you all.

 

[Allan Herriman]

On 21 Apr 2004 04:04:14 -0700, inaganti_suni@yahoo.com (sunil) wrote:

HI,
I want to generate VCD file for my VHDL file. I am using modelsim
5.6f. If anybody knows the commands which we have to run to get VCD
file please mail those.
thanking you all.

If you have a license that allows Verilog + VHDL co-simulation, you
can add this to a Verilog module somewhere:

initial
begin
$dumpfile("myfile.vcd");
$dumpvars(1, mytopinstancename );
$dumpon;
end

Regards,
Allan.

 

[Vikram Pasham]

I want to generate VCD file for my VHDL file. I am using modelsim
5.6f. If anybody knows the commands which we have to run to get VCD
file please mail those.
thanking you all.

After "vsim" command use following commands to create a VCD file
vcd file file_name.vcd
vcd add -r *
run -all

"vcd file" command creates a vcd file and "vcd add -r *" logs all signals
in the design. Refer Modelsim manual for further description and examples.



-Vikram

 

[PO Laprise]

sunil wrote:

HI,
I want to generate VCD file for my VHDL file. I am using modelsim
5.6f. If anybody knows the commands which we have to run to get VCD
file please mail those.
thanking you all.

I don't know for Modelsim 5.6, but in 5.7: open Modelsim, do "Help" ->
"SE PDF Documentation" -> "Command Reference", and look in the index
under "VCD Files". There are multiple commands that can be used from a
TCL script or the Modelsim command line to create VCD files and add
signals to them.

--
Pierre-Olivier

-- to email me directly, remove all _N0SP4M_ from my address --

 

[sunil]

HI,
Thanks to all who gave a response. Actually i need the VCD file
for power calculation. So, please tell me whther i have to simulate
with the correct data(clk frequnecy depends on the max.frequency
allowed) or not for generating VCD file.

 

[jtw]

"sunil" <inaganti_suni@yahoo.com> wrote in message
news:9f28d282.0404220159.164f8828@posting.google.com...

HI,
Thanks to all who gave a response. Actually i need the VCD file
for power calculation. So, please tell me whther i have to simulate
with the correct data(clk frequnecy depends on the max.frequency
allowed) or not for generating VCD file.

Your estimate is likely to be no better than what you give the tool to work
with. Xpower will give an estimate based on activity rates you
provide--either default, or manually, or via vcd. Your simulation should
reflect what you would want to measure.

Jason