Test program

[abroban]

Hello everybody,

I'm starting to use VHDL and Vivado and I want to check if my code do what i want it to do.

For exemple, is there a way to check it with a truth table?

For check a Xor, nand, for exemple..

It's should be easy, but i didnt find it.

Best regards.

Andy B.

[yenigal]

Hi

You can write a test bench to simulate your code and compare it with the expected data output.

[yenigal]

Hi

Check below doc

http://www.xilinx.com/support/documentation/application_notes/xapp199.pdf

[abroban]

Hello Satish and thank you,

I already saw it, but is there no easier way to test it?
I mean, I'm starting VHDL and to check some lines, I have to do all this ones?

Best regards,

Andy B.

[vijayak · Accepted solution]

Hi,
If your design is so simple, you can run the behavioral simulation & try forcing the input values at the waveform level and see how your output is getting changed.
For it is a best practice to write testbench to verify your design.

[bassman59]

---

@abroban wrote:
Hello Satish and thank you,

I already saw it, but is there no easier way to test it?
I mean, I'm starting VHDL and to check some lines, I have to do all this ones?

---

Test benches are a necessary part of FPGA design.

Start learning how to do them now, while your designs are simple.

[abroban]

Hi all,

I tried to use "Run behavioral simulation", but "ERROR: [Simtcl 6-50] Simulation engine failed to start: A valid license was not found for simulation.". Nevertheless, I have the WebPACK and it allows me this.

Will Testbench give me a chronogram?

Regards,

Andy B.

[yenigal]

Hi

Do you have the webpack license for vivado.

Does the version limit of the license file supports the vivado version you are using.

You can find the  version limit info from below AR

http://www.xilinx.com/support/answers/33770.html

[abroban]

Hi,

Hmm, my last post is empty, dont know why.
So yes I have, but I cant put a picture apparently

Regards,

Andy B.

[pulim]

Hi,

Please run this below command in TCL console of Vivado and share the output.

report_environment -file <directory>/xinfo.txt

[abroban]

Hi Manusha,

I cant share it, "Message cannot exceed 60,000 characters."

Regards

Andy B.

[yenigal]

Hi

Did you try attaching the output file instead of copying the contents to the post.

[abroban]

Hi Satish,

Hmm, i didnt try, good idea..

So now there is.

Regards

Andy B.

[yenigal]

Hi

The license info shows that you have ISE webpack license. This will not work with vivado.

You need to generate a vivado webpack license and install it to use vivado.

[abroban]

Hi,

But I can use Vivado actually, what's the diffrence with the license that I already have?

Regards,

Andy B.

[abroban]

Hi,

So I search a little and I found.
So now i can use simulation, great jobs gentlemen.

Thank you so much.

Regards

Andy B.