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Issue of unrecognized system task or function: $cdn_ahb_access (Read 751 times)
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Issue of unrecognized system task or function: $cdn_ahb_access
Nov 28th, 2017, 6:23am
I'm trying to verify the simple AHB block by using VIPCAT, so I made simple test.v as the below

`timescale 1ps/1ps

module test2(

   parameter interface_soma = "test2.soma";
   parameter init_file   = "";
   parameter sim_control = "";
   input HCLK;
   input HRESET;
   output [31:0] HADDR;


     assign HBUSREQ = den_HBUSREQ;
   output HLOCK;
     reg den_HLOCK;
     assign HLOCK = den_HLOCK;
   input HGRANT;

And I want to use the VIPCAT to generate a BFM file for the AHB interfacing test.
But I'm stuck in the below process. How do I resolve this problem?

When I execute with the below command
$ncverilog +access+wrc test2.v

then I've got the below errors    $cdn_ahb_access(HCLK,HRESET,den_HADDR,den_HTRANS,den_HWRITE,den_HSIZE,den_HBURS
ncelab: *W,MISSYST (./test1.v,70|18): Unrecognized system task or function: $cdn_ahb_access (did not match built-in or user-defined names) [2.7.4(IEEE Std 1364-2001)]

Could you please help me how can I resolve this problem?.

I've attached with file (.v and executing file)
Would you help me how do I get the correct executing file?
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Andrew Beckett
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Posts: 1742
Bracknell, UK
Re: Issue of unrecognized system task or function: $cdn_ahb_access
Reply #1 - Dec 21st, 2017, 7:21am
Not really my field, but some records of this suggest that it's due to not having been set up or not including the VIP PLI on the command line.

I suggest you try doing (set the path to your installation with setenv if csh, or export if using bash/ksh):

setenv CDN_VIP_ROOT /path/to/VIPCAT_release

Do this in an empty directory and then inspect the various files in the directory.

If this doesn't help, best to go to and ask for help...


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