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issue in vhdl-ams compilation

sebgimi

Hi,

I'm trying to write a code for a comparator in vhdl-ams. I use incisiv (13.10.013) and when I compile the code (just the entity) an error is occuring:

This is my code:

library ieee;
use ieee.electrical_systems.all;
use ieee.std_logic_1164.all;
use ieee.math_real.all;

entity comparator is

 generic (level : real := 2.5; -- threshold
   vcc   : real := 5.0;   
   gnd   : real := 0.0);  

 port(--terminal e: electrical;  -- analogic in
            signal   s: out std_logic); -- digital out

end comparator;

When I write exactly what is below, the following error is occuring:

ncvhdl -work st_lib -message ../sources/comparateur_ent.vhdl
ncvhdl: 12.20-p001: (c) Copyright 1995-2012 Cadence Design Systems, Inc.
../sources/comparateur_ent.vhdl:
use ieee.electrical_systems.all;
        |
ncvhdl_p: *E,SELLIB (../sources/comparateur_ent.vhdl,2|8): unit (ELECTRICAL_SYSTEMS) not found in library (IEEE).
        errors: 1, warnings: 0

It look like that the library electrical_systems is not recognized by the compiler.

 Someone can help please?

  • If in your cds.lib you have something like this:

     INCLUDE $IUSHOME/tools/inca/files/cds.lib

    which will give you access to the IEEE (ieee) library. However, for AMS use you need to instead have:

     INCLUDE $IUSHOME/tools/inca/files/IEEE_vhdlams/cds.lib

    If you compile your example with this in your cds.lib, it will compile fine.

    Regards,

    Andrew.

  • Hi,

    Thanks a lot! That's work now, but when I remove comment on the following line: " terminal e : electrical; " this error appear:

     ncvhdl -work st_lib -message ../sources/comparateur_ent.vhdl
    ncvhdl: 13.10-s013: (c) Copyright 1995-2013 Cadence Design Systems, Inc.
    ../sources/comparateur_ent.vhdl:
            port(terminal e: electrical;  -- entree analogique
                          |
    ncvhdl_p: *E,MISCOL (../sources/comparateur_ent.vhdl,12|15): expecting a colon (':') 87[4.3.3] 93[4.3.2].
            errors: 1, warnings: 0

    Is this ok if the word "terminal" is not in color like others key word in ams? Do I use the right library for vhdl-ams?

  • I didn't notice this earlier, but you need to pass -ams on the ncvhdl command line:

     ncvhdl -work st_lib -ams -message ../sources/comparateur_ent.vhdl

    That will fix the problem. You need this if you are compiling VHDL-AMS code.

    Regards,

    Andrew.

  • Hi,

     Everything is ok now, thank you very much!

    Regards,

    Sebastien.

  • Hi Andrew,
    Has the cds.lib location for ams changed in the most recent version of Cadence (6.1.6 64b)? When I use the above statement in my cds.lib file I get the following error on compilation:

    INCLUDE $IUSHOME/tools/inca/files/cds.lib
    |
    ncvhdl: *W,DLCPTH (./cds.lib,28): cds.lib No such file '/Incisive/tools/inca/files/cds.lib' (cds.lib command ignored).
    TOOL: ncvhdl(64) 14.10-s004: Started on Apr 27, 2017 at 11:02:41 BST

  • No, this has not changed. Are you sure that your INCISIVE installation is at /Incisive? Perhaps $IUSHOME is not set properly. 

    This is nothing to do with the IC version you're using (IC6.1.6) - it's related to whatever you have set $IUSHOME to in your environment.

    Regards,

    Andrew.

  • Thanks Andrew.

    I have found two locations which seem relevant:

    usr/local/cadence/current2016-17/INCISIVE_15.20.010/tools/inca/files/IEEE_vhdlams/cds.lib

    and

    usr/local/cadence/current/INCISIV141/tools.lnx86/inca/files/IEEE_vhdlams/cds.lib

    do you think either of these might be the correct cds.lib file?
  • Sorry, the two locations are as follows:

    usr/local/cadence/2016-17/INCISIVE_15.20.010/tools/inca/files/IEEE_vhdlams/cds.lib

    and

    usr/local/cadence/current/INCISIV141/tools.lnx86/inca/files/IEEE_vhdlams/cds.lib

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