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Importing a VHDL file into Virtuoso for mixed signal sim

FernandoLeite

Hello, I am experiencing quite a few problems when trying to include a VHDL file into a mixed signal testbench to verify its functionalities. The testbench is created (config + schematic), the vhdl file was imported with  "VHDL Import" (following Cadence Help Docs...). The tool creates 3 cell views: entity, rtl and symbol. After that I set the binding view in Hierarchy Editor to "entity" and try to run the simulation (note that "entity" view has only the entity part of VHDL code, and "rtl" view has the actual behavioural code).

 I get an error message stating: "ncelab: *F,CUIVEN: Illegal view named entity specified for binding in sil180_adc_spi.el_spi_static:entity."

 Ok, trying to solve this I create a "vhdl" cellview for the same block, containing the whole VDHL code (entity + rtl). This time, when I modify this new "vhdl" view, the tool automatically updates the other two views ("entity" and "rtl"). Going back to Hierarchy Editor I set the current view of the block to "vhdl" and try to run the sim again. 

This time I get the following errors: 

ncelab: *W,CUNOUN: Cannot find any unit under sil180_adc_spi.el_spi_static:vhdl in the design libraries.
ncelab: *E,DLCSMD: Dependent checksum entity SIL180_ADC_SPI.EL_SPI_STATIC (AST) doesn't match with the checksum that's in the header of: architecture SIL180_ADC_SPI.EL_SPI_STATIC:RTL (AST).

I really tried to find out WHAT this error means. Can anyone give a hand here?

 Thanks in advance.

=)

  • Hello,

     I am facing the identical problem. I wonder if you could somehow figure it out.

    I'd really appreciate it if you could help.

    Thank you

    Yigit

  • Did you use git as version control program?

  • Hi all,

    the same error message I get in year 2020 with IC6.1.8 AMS simulations plus external VHDL code.

    I only get the error if I run "2 or more jobs in parallel" - if I run only "1 job" then the error does not appear.

    Loading snapshot ATIC543_tb.NOX_ADC14B_tb:config ..................
    xmsim: *E,DLCSMD: Dependent checksum module worklib.cds_globals:vams (VST) doesn't match with the checksum that's in the header of: snapshot ATIC543_tb.NOX_ADC14B_tb:config (SSS).
    xmsim: *F,NOSIMU: Errors initializing simulation 'ATIC543_tb.NOX_ADC14B_tb:config'.

    I use precompiled "External HDL" in the hierarchy editor.

    Interestingly, the "xrun.log" error message link of the run "Interactive.9" points to the previous version "Interactive.8" worklib.cds_globals:vams (see screenshot):

    There are multiple "cds_globals.vams" files:

    - in simulation folder "psf/<testname>/netlist"  (e.g. ../Interactive.9/psf/Output_test/netlist/cds_globals.vams)

    - and in each subfolder for each run "<simulation_run>/<testname>/netlist" (e.g. ../Interactive.9/1/Output_test/netlist/cds_globals.vams)

    Has anyone an idea what bad setting is causing this ? 

    Why/what is creating the checksum ?

  • in reply to HoWei

    I found some old reports of this (very old - over 15 years) with cds_globals which were resolved by removing old *.pak files in the library (which shouldn't be needed and it's not obvious in this case which should be removed). The article Cause and cure for the DLCSMD error doesn't help enormously... (there are quite a few cases related to DLCSMD but not sure why it would show up here).

    It's probably best to contact customer support - we may need to do some digging around.

    Andrew.

  • in reply to HoWei

    The below setting seem to be required to avoid dependencies on previous runs.

    It seems that now multiple runs are started, but for some runs the following error exists:

    xmsim: *W,DLWNEW: Intermediate file connect worklib.ddiscrete_dynsup_full_fast_ie2_cr:vams (VST)
     is newer than expected by snapshot ATIC543_tb.NOX_ADC14B_tb:config (SSS)
      actual:   Mon Nov  9 12:49:43 2020
      expected: Mon Nov  9 12:49:41 2020.
    xmsim: *W,DLWNEW: Intermediate file module worklib.cds_globals:vams (VST)
     is newer than expected by snapshot ATIC543_tb.NOX_ADC14B_tb:config (SSS)
      actual:   Mon Nov  9 12:50:07 2020
      expected: Mon Nov  9 12:49:40 2020.
    xmsim: *E,DLNORD: Intermediate file for module worklib.cds_globals:vams (SIG) <0x13aeccd1> could not be read (no such object).

    xmsim: *F,NOSIMU: Errors initializing simulation 'ATIC543_tb.NOX_ADC14B_tb:config'.

  • in reply to HoWei

    Hi,

    thanks Andrew - after deleting the existing *.pak files (basically deleting the ./xcelium.d folder) the simulation is running with multiple jobs !

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