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OCEAN SCRIPT for getting dynamic energy consumption

Carmichaeli

Hi everyone,

I designed a circuit through cadence virtuoso and extracted the spice netlist (.scs) from the ADE. Then I want to do circuit simulation many many times with different input variables by OCEAN SCRIPT. I know a little about the Ocean Script on how to use the For Loops, but I don't know how to get the dynamic energy consumption just by coding in ocn file.

It seems that the ADE can generate an ocean script file for one state automatically. If I use the calculator, the value of dynamic consumption can be calculated and shown in the Result Display Window by click "Tools" -> "Table" in the calculator window (I use average(i("/V0/PLUS" ?result "tran-tran"))*1.8 to get the value). But after saving (in ADE), I can't find any code segment containing this part (like integ, average or other computation) in that ocean file (also can't find them in the spectre netlist I just extracted). The spectre netlist and ocean script file seems just gave me the settings about this simulation or generated the psf file. I just can get the correct result through the calculator way. If I add my own code I always get zero.

Can anyone help me get the dynamic consumption in the ocean script way or give me a few examples?

Thank you extremely!

Here is ocn file,

-------------------------------------------------------- 

simulator( 'spectre )

design( "/homes/grad/cadence/Design/inverter_simulate/simulation/inverter_simulate/spectre/schematic/netlist/netlist")

resultsDir( "/homes/grad/cadence/Design/inverter_simulate/simulation/inverter_simulate/spectre/schematic" )

modelFile( 

    '("/homes/grad/cadence/models/spectre/tsmc20N.m" "")

    '("/homes/grad/cadence/models/spectre/tsmc20P.m" "")

)

analysis('tran ?stop "30n"  )

envOption(

'analysisOrder  list("tran") 

)

save( 'v "/out" "/in") 

temp( 27 ) 

run()

 

Parents

  • Thank you for your reply and it's helpful!

    I met another problem. I want to design another circuit which is not based on virtuoso. I mean I just wrote the circuit netlist directly on a blank text document by hand. Then I also wrote an ocean document(.ocn) by hand and found immediately that another file (input.scs) is required (but may not appear in ocean script file(.ocn). Later, it run and generated the psf, but some errors appeared like "The output '/V0/PLUS' you selected does not exist."

    The simulation works good when I use the ocn file that is extracted automatically from ADE. So, do I need some other documents to do the simulation which is just in the Ocean environment?

    -----------------------

    simulator( 'spectre )

    design( "/homes/cadence/research/exam/netlist")

    resultsDir( "/homes/cadence/research/exam" )

    modelFile( '("$CDK_DIR/models/spectre/nom/models.scs" "") )

    out = outfile("/homes/cadence/research/exam/mresl_t.txt" "w")

    for( cntrl 1 8 analysis('tran ?stop "30n" )

    desVar( "vq" 1.0+0.1*cntrl )

    envOption( 'analysisOrder list("tran") )

    save( 'i "/V0/PLUS" )

    temp( 27 )

    run()

    openResults("/homes/cadence/research/exam/psf")

    selectResult('tran) linshi=1.0+0.1*cntrl

    dec = (average(i("/V0/PLUS" ?result "tran-tran")) * linshi)

    fprintf(out "%f\n" dec) )

    close(out)

    -----------------------------

    Thank you so much!

    Wayne. 

Reply

  • Thank you for your reply and it's helpful!

    I met another problem. I want to design another circuit which is not based on virtuoso. I mean I just wrote the circuit netlist directly on a blank text document by hand. Then I also wrote an ocean document(.ocn) by hand and found immediately that another file (input.scs) is required (but may not appear in ocean script file(.ocn). Later, it run and generated the psf, but some errors appeared like "The output '/V0/PLUS' you selected does not exist."

    The simulation works good when I use the ocn file that is extracted automatically from ADE. So, do I need some other documents to do the simulation which is just in the Ocean environment?

    -----------------------

    simulator( 'spectre )

    design( "/homes/cadence/research/exam/netlist")

    resultsDir( "/homes/cadence/research/exam" )

    modelFile( '("$CDK_DIR/models/spectre/nom/models.scs" "") )

    out = outfile("/homes/cadence/research/exam/mresl_t.txt" "w")

    for( cntrl 1 8 analysis('tran ?stop "30n" )

    desVar( "vq" 1.0+0.1*cntrl )

    envOption( 'analysisOrder list("tran") )

    save( 'i "/V0/PLUS" )

    temp( 27 )

    run()

    openResults("/homes/cadence/research/exam/psf")

    selectResult('tran) linshi=1.0+0.1*cntrl

    dec = (average(i("/V0/PLUS" ?result "tran-tran")) * linshi)

    fprintf(out "%f\n" dec) )

    close(out)

    -----------------------------

    Thank you so much!

    Wayne. 

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