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Setting vhdl tb generic using irun command

itsonlyme

Hi all,

I've got a problem. In my tb I've got a generic:
        G_WAVEFORM_TYPE : string := "xxx" 

and i'd like to change "xxx" to "yyy" using irun "start.f" file, but i can't

-mess -v93 -assert ../src/dut.vhd ../src/tb.vhd -generic "tb.G_WAVEFORM_TYPE => "yyy""
or in other file:
-top tb -access rwc -defparam tb.G_WAVEFORM_TYPE="yyy" -nowarn CUDEFB
doesn't work. Could you  tell me how to set a tb (vhdl) generic from *.f file using irun -f and what is the correct command to do it?

Thanks,
John. 

  • -defparam is for Verilog parameters. There is a -generic switch that can handle top level VHDL parameters.

  • OK. :)

    In which place i should use it - compilation line or elaboration? And what is the format of argument if generic is a string?

    -generic "tb.G_WAVEFORM_TYPE => "yyy""

    or 

    -generic "tb.G_WAVEFORM_TYPE => yyy"

    or

    -generic tb.G_WAVEFORM_TYPE = "yyy"

    Thanks,

    John. 

  •  -generic is the right switch but you may need to use colons not dots.

    From the docs:  irun -generic "vlog_top:vhdl_inst1:gen => 4" top_level_design_unit

    So for you: irun -generic 'tb.G_WAVEFORM_TYPE => "yyy"'

  • It's an elaboration switch. Your quotes are wrong, use this:

     -generic 'tb.G_WAVEFORM_TYPE => "yyy"'

     

  • My run.f file:
    // Compile the VHDL files
    -mess -v93 -assert ../src/dut.vhd ../src/tb.vhd

    // Information for elaboration
    -top tb -access rwc -generic 'tb.G_WAVEFORM_TYPE => "yyy"' -nowarn CUDEFB

    // Set up the simulation
    -input ../src/dir_ncsim/setup.tcl

    // exit simulation at the end
    -exit

    Used command:
    irun -64BIT -f ../src/dir_ncsim/run.f

    Return code:
    irun: *E,FMUK: The type of the file (=>) could not be determined.
    irun: *E,FILEMIS: Cannot find the provided file =>. 
    irun: *E,FMUK: The type of the file (yyy') could not be determined.
    irun: *E,FILEMIS: Cannot find the provided file yyy'.

    yyy' should be a string value not a name of file. And what does ' mean? Any ideas? When I do not set generic, simulation working fine, but for default "xxx" value.
     
    I'm using INCISIV131.

    Greetings,
    John.

  •  I don't know which version you're running but maybe irun isn't liking the single quotes. I built a small example for you, untar it and run the RunMe.sh to see how it works - the test should print "irun" to show the generic got the command-line value instead of the "vhdl" value that's set in the instantiation.

     

    generic.tar

  •  Here's Stephen's entry:

     

    -generic "tb:u_dut:str=>\"irun\""

     

    It seems like every Unix shell and the irun -f file processor interprets quote characters differently. So adding escape characters helps nail down exactly what you meant to say.



  • // Information for elaboration
    -top tb -access rwc -generic "tb:G_WAVEFORM_TYPE=>\"yyy\"" -nowarn CUDEFB

    It's working now, thank you very much. :)

    John.

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