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cds_srr error

peter450

 HI,

I'm implementing a circuit in cadence and I'm checking the harmonics of the circuit using MATLAB.I'mwriting the commands in MATLAB according to document/ <MMSIMHome>/tools/spectre/examples/SpectreRF_workshop/SpectreRF_AN/MatlabWorkshop.pdf. When I enter the command cds_srr ('results directory' ) It is giving error

 Undefined function or method 'cds_srr' for input arguments of type 'char'

How can I include this function?

  • Did you set all your environment variables correctly before launching Matlab?

  •  First I invoked cadence spectre and simulated the design.Then I invoked matlab and set the path of resultant directory by resdir.And I gave cds_srr('resdir').It is giving the error at that time.I did this as mentioned in the document.

    I'm not sure about the environmental variables I need to set (they are not mentioned in the document).

    Can you tell me what variables I need to set to run the matlab?.

  • Refer to the matlab application note pdf in the same folder as the workshop pdf, it describes how to set up the environment -- namely LD_LIBRARY_PATH and MATLABPATH.

  •  Thankyou. I set the correct library ,matlab path and its working for one command 

    when I enter

    datasets = cds_srr(resdir) its working

    But when I enter next command   "signals = cds_srr(resdir, 'sp-sp');" I'm getting error

    ??? One or more output arguments not assigned during call to "cds_innersrr".

    Error in ==> cds_srr at 18
        sig = cds_innersrr(dirname, dataset);
     

  • Can you post the complete output of the first cds_srr() command and the second cds_srr() command (with two args)? I've only seen this if either the directory name or the result dataset (second arg) is invalid for the data that exists - and then it gives a message before the error. 

    Also I believe it may happen with non-spectre simulation results - but perhaps you can confirm you're using spectre.

    Andrew.

  • resdir = '/simulation/Design/spectre/schematic/psf/'

     datasets = cds_srr(resdir)
    PSFversion: 1.00
    tran-tran (tran).
    finalTimeOP-info (info).
    modelParameter-info (info).
    element-info (info).
    outputParameter-info (info).
    designParamVals-info (info).
    primitives-info.primitives (info.primitives).
    subckts-info.subckts (info.subckts).
    variables (design_variables).

    datasets =

        'tran-tran'
        'finalTimeOP-info'
        'modelParameter-info'
        'element-info'
        'outputParameter-info'
        'designParamVals-info'
        'primitives-info.primitives'
        'subckts-info.subckts'
        'variables'

    >> signals = cds_srr(resdir, 'sp-sp');
    Error: The special dataset is not exist.
    ??? One or more output arguments not assigned during call to "cds_innersrr".

    Error in ==> cds_srr at 18
        sig = cds_innersrr(dirname, dataset);

    These are the two commands I used.

  • Isn't the error message pretty clear?

    "The special dataset is not exist"

    You have asked for the dataset 'sp-sp' but this is not one of the datasets that are in the results - it did not appear in the list returned by cds_srr with a single argument. 'sp-sp' would be from an s-parameter analysis (ie spectre's sp analysis) - but that presumably hasn't been run in your case.

    If you did:

    signals = cds_srr(resdir, 'tran-tran')

    It should work, since tran-tran was one of the available datasets.

    Regards,

    Andrew

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