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Altera_Forum
Honored Contributor I
1,690 Views

NCO Simulation help

Hello, 

 

I am new to FPGA/VHDL and I am trying to generate a sine wave using the Altera NCO IP Core. I have instantiated the IP component and I am using the test bench generated. When I try and simulate the design using modelsim I get numerous errors similar to the one below: 

 

Error(suppressible): (Vsim-10000) nofile(39): unresolved defparam reference to 'acc' in acc.lpm direction. 

Time : 0 ps iteration: 0 instance: /sine_ip_core/uo/nco_ii_0/ux000 File: nofile. 

 

 

Does anyone have any suggestions to solving this issue? 

 

Any help would be appreciated. 

 

Kind regards
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4 Replies
Altera_Forum
Honored Contributor I
102 Views

Hi, 

 

1.Are using tcl scripts for setting up model-sim? 

I have tried to simulate it is working. with the help of tcl script generated and few comments. 

Can you share the screen short of the error. 

Attached model-sim transcript log file for reference. 

 

Best Regards, 

Anand Raj Shankar 

(This message was posted on behalf of Intel Corporation)
Altera_Forum
Honored Contributor I
102 Views

Thanks for your response. 

 

I am simulating by setting the test bench file in Alteras simulation settings and then clicking Tools -> Run Simulation Tool -> RTL simulation. This prompts modelsim and then I get the following errors: 

 

https://www.alteraforum.com/forum/attachment.php?attachmentid=14621  

 

 

I have not encountered using TCL scripts to simulate as of yet... 

 

Kind regards
Altera_Forum
Honored Contributor I
102 Views

The NCO core files are encrypted and can't be used by Modelsim. You need to generate a dedicated simulation model and - as I guess - import it manually in your simulation project.

Altera_Forum
Honored Contributor I
102 Views

 

--- Quote Start ---  

Thanks for your response. 

 

I am simulating by setting the test bench file in Alteras simulation settings and then clicking Tools -> Run Simulation Tool -> RTL simulation. This prompts modelsim and then I get the following errors: 

 

https://www.alteraforum.com/forum/attachment.php?attachmentid=14621  

 

 

I have not encountered using TCL scripts to simulate as of yet... 

 

Kind regards 

--- Quote End ---  

 

 

Hi, 

 

1.While generating system(NCO), have you enable simulation? 

So that you can use scrip for loading the libraries which is easy to do. 

Refer the doc for steps: 

 

Best Regards, 

Anand Raj Shankar 

(This message was posted on behalf of Intel Corporation)
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