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writing out a .vcd file from spectre

geezmaneti

I'm working with a small (very small) SRAM circuit. I'm simulating the design using Spectre from within Cadence (icfb). I'm VERY frustrated with the waveform viewer that pops up when the simulation is done. I'd love to write out a .vcd file and use a viewer that undoubtedly will be more suitable for debug of a "digital" design. I plan on using GTKWave since it's free, though if i had access to nWave (part of Verdi, formaly Debussy) i'd do it in a heartbeat. Any help would be appreciated, even if it's to point me to another forum. 

By the way, a user (TAM1) has already kindly pointed me in the direction of the '-input mycmdfile.tcl' option for the simulator, then, add a couple of lines in that file instructing the simulator to dump the .vcd file for all levels. However, it seems that spectre doesn't like tcl commands (or at least the -input option). 

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  • The waveform viewer you are showing (in the background, behind your pop up window) is what i want. However, i get a very "analogish" style of waveform viewer. Keep in mind that i'm launching Spectre from Cadence and not standalone. I also have not come across a tool called SimVision.

     Nonetheless, i did find out that you can export the waveform from the calculator tool from within the waveform viewer (seems very convoluted). But i will have to figure out how to get that into a .vcd format (shouldn't be too hard).

     Thanks for the info. I will try posting to the functional verification forum as well.

     Mike 

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  • The waveform viewer you are showing (in the background, behind your pop up window) is what i want. However, i get a very "analogish" style of waveform viewer. Keep in mind that i'm launching Spectre from Cadence and not standalone. I also have not come across a tool called SimVision.

     Nonetheless, i did find out that you can export the waveform from the calculator tool from within the waveform viewer (seems very convoluted). But i will have to figure out how to get that into a .vcd format (shouldn't be too hard).

     Thanks for the info. I will try posting to the functional verification forum as well.

     Mike 

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