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Conditional SHM probe

Sharjeel

Hi,

   I am running a large simulation, and want to make a conditional SHM database.

To be more specific, consider a signal P. I want to buffer (buffer, not save) the SHM database between every two successive P posedges. If at current posedge of P, signal Cond is 1, write the buffered data to database, otherwise discard it.

 Any ideas?

 Thanks,

 Sharjeel Saeed

  •  Hi Sharjeel.

    Interesting challenge! I don't know if it's natively supported.

    You could try the following via TCL:

    1. Set up all the probes with "probe -create -name <unique_name>" choosing a unique_name that corresponds to the DUT signal that gates the probe.
    2. At time zero, use "probe -disable <unique_name>" to start with no probing.
    3. Add TCL breakpoints via the "stop" command to monitor the signal and turn the probes on and off:
      stop -if <dut_sig>=1 -execute {probe -enable <unique_name>} -continue
      stop -if <dut_sig>=0 -execute {probe -disable <unique_name>} -continue
    This is a bit simplified, as I can't think if the breakpoints are edge or level sensitive. I'm sure you can work it out from this example and the docs. Good luck, and please post back when you've got it to work, I'm sure others would thank you for it...

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