Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
would love to switch to this package and get rid of my buggy parsing subroutines.
You are a wise monk, indeed. I have also come to realize that parsing Verilog is not a trivial matter. Every time I get the urge to do so, I take a step back and ask myself these questions:
  1. Can any of the tools for which my $company pays millions of dollars per annum already do what I need?
  2. Are there any free tools available out on the 'net which can do what I need?

If the answer to the above is "no", then I turn to Perl.

would love to switch to using Verilog::Perl if it makes things simpler
Since I have not used these tools, I can not comment on their capabilities or limitations. However, according to the documentation, they seem quite useful. I think it is well worth a try.
point me to a website with such examples
I have done some searching, but I have not found any examples. I encourage you to give it a try, and report back here if you discover anything. CPAN modules usually have an "examples" directory in the install area. Have you looked there?
Could you also show an example of how to identify the ports of the module, what blocks are instantiated in it, what ports those blocks have, and what they're connected to
Sure. This is my first program using Verilog::Netlist (see also Re^3: verilog-perl vhier usage). I merely adapted the EXAMPLE given in the POD on CPAN.
> cat top.v module top; buff b0 (); endmodule module buff (buf_in, buf_out); input buf_in; inout out; wire a; inv i0 (.in(buf_in), .out(a )); inv i1 (.in(a ), .out(buf_out)); endmodule module inv (in, out); input in; output out; assign out = ~in; endmodule > > cat example.pl #!/usr/bin/env perl use strict; use warnings; use Verilog::Netlist; # prepare netlist my $nl = new Verilog::Netlist(); $nl->read_file(filename => './top.v'); # read in any sub modules $nl->link(); $nl->lint(); $nl->exit_if_error(); print "Module names in netlist:\n"; for my $mod ( $nl->modules() ) { print $mod->name(), "\n"; } print "\n"; for my $mod ( $nl->top_modules_sorted() ) { show_hier($mod, '', '', ''); } sub show_hier { # Recursively descend through module hierarchy, # printing each module name and full hierarchical # specifier, all module port names, and all # instance port connections. my $mod = shift; my $indent = shift; my $hier = shift; my $cellname = shift; if ($cellname) { $hier .= ".$cellname"; } else { $hier = $mod->name(); } print "${indent}ModuleName=", $mod->name(), " HierInstName=$hier\n +"; $indent .= ' '; for my $sig ($mod->ports_sorted()) { print $indent, 'PortDir=', sigdir($sig->direction()), ' PortNam +e=', $sig->name(), "\n"; } for my $cell ($mod->cells_sorted()) { for my $pin ($cell->pins_sorted()) { print $indent, ' PinName=', $pin->name(), ' NetName=', $pin +->netname(), "\n"; } show_hier($cell->submod(), $indent, $hier, $cell->name()) if $c +ell->submod(); } } sub sigdir { # Change "in" to "input" # Change "out" to "output" my $dir = shift; return ($dir eq 'inout') ? $dir : $dir . 'put'; } > > ./example.pl Module names in netlist: buff inv top ModuleName=top HierInstName=top ModuleName=buff HierInstName=top.b0 PortDir=input PortName=buf_in PortDir=inout PortName=out PinName=in NetName=buf_in PinName=out NetName=a ModuleName=inv HierInstName=top.b0.i0 PortDir=input PortName=in PortDir=output PortName=out PinName=in NetName=a PinName=out NetName=buf_out ModuleName=inv HierInstName=top.b0.i1 PortDir=input PortName=in PortDir=output PortName=out >
My Verilog example code is extremely simple. I can not guarantee it will work for whatever code you have. But, give it a try.

May I ask what you plan to do with the parsed output?


In reply to Re^3: verilog perl usage (Verilog::Netlist) by toolic
in thread verilog perl usage by perlvoyager

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others imbibing at the Monastery: (12)
    As of 2014-09-18 15:42 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      How do you remember the number of days in each month?











      Results (116 votes), past polls