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simvision analog variables and signals display issue

mxgong

Hi,

I am running ams simulation in the interactive mode.

However, the simulation has gone through, but I can only observe the digital signals. All analog signals (including inputs and outputs) and variables within the analog begin block are showing no value in the waveform window.

Here vin[8] is a net in the testbench schematic. triggers_out[x] are digital signals. Ceq is a real number inside the analog begin block.

When I stop the simulation and open result browser, the signals in schematics are saved there.

Thanks

Minxiang

  • Andrew Beckett

    Minxiang,

    Which XCELIUM and SPECTRE sub-versions are you using? (these will be reported in the simulation log)

    Andrew

  • mxgong
    in reply to Andrew Beckett

    Hi Andrew,

    Thanks for the quick reply.

    the XCELIUM version is 23.03-a071 64b

    the spectre version is 24.1.0.314.isr6 64b

    Thanks

    Minxiang

  • mxgong

    If I change data format of spectre from udb to sst2. It works. I know simvision uses sst2 format, but I take a look in udb option that it did save the data in sst2. I have to manually reload database in simvision. Any root cause of this?

  • Andrew Beckett
    in reply to mxgong

    Can you try with a more recent version of both XCELIUM and Spectre? There were some UDB-related issues with waveform display (without knowing the precise details it's hard for me to check what broke when and was fixed when).

    Andrew

  • mxgong
    in reply to Andrew Beckett

    The previous one that worked with udb is using XCELIUM 64b 20.09-s009 and Spectre 64b 21.1.0.648.

    Minxiang

  • Andrew Beckett
    in reply to mxgong
    mxgong said:
    The previous one that worked with udb is using XCELIUM 64b 20.09-s009 and Spectre 64b 21.1.0.648.

    This worked before, then something broke, and as far as I know it's been fixed in the meantime. Hence my suggestion to use a later version (I'm just not sure whether it's on the XCELIUM or SPECTRE side - I would have to do some digging for that and I'm away from work for a few days...)

    Andrew

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