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dbcommands

ArvindBezawada

Hi how to give adress of timing library and other valuies using this command

 dbNetEvalDelayAndTran netPtr timeArcPtr rise_delay(ns) rise_trans(ns) fall_delay(ns) fall_trans(ns)

 RightNow for reporting slew value of a net using "reportNet -net net_name"..This is taking longer time ..if it is a post route database it is

going for full chip extraction and then it is reporting so can we use any dbget command as alternative.......

  • I think the best way to query values like these are with the Advanced Timing TCL commands like these for example:

    encounter 1> get_pins DTMF_INST/TDSP_CORE_INST/i_10084/Y
    encounter 2> report_property [get_pins DTMF_INST/TDSP_CORE_INST/i_10084/Y]
    max_transition                      | 4.500
    slew_max_fall                       | 0.398
    slew_max_rise                       | 0.739
    slew_min_fall                       | 0.398
    slew_min_rise                       | 0.739
    encounter 10> get_property [get_pins DTMF_INST/TDSP_CORE_INST/i_10084/Y] slew_max_rise
    0.739
    A nice thing about get_property is that you can specify which MMMC view you want query:
    encounter 11> get_property [get_pins DTMF_INST/TDSP_CORE_INST/i_10084/Y] slew_max_rise -view setup_func
    0.739

    Think these will help meet your needs?

  • Hi BobD thanks for this...i tried this but report_property..if i use that again it is going to start full chip extraction and then it is reporting the values as u mentioned...as my design is at post route stage.....

     So is there any time saving ...in the sense any dbcommand available....to give the value directly with out going for extraction

     Thanks..

    Arvind

  • Once the timing graph is built, you should be able to query the timing graph without re-extracting. Could you try doing a "timeDesign -postRoute" and then calling report/get_property?

  • Looks like ...When you load a fresh databsase and then use report_property then it will extract for full design.

    So First use report_timing and then use 'report_property' command.

    If you already have done report_timing on design then it will not extract again.

  • common man...i know that i am fresh and my database is fresh...only thing i need is is there any alternate dbcommand...Thats what i want...chirageeeeey...

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