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Wait for a specific delay

SpecMAN INFANT

Hi,

 Is it not possible to wait for a variable defined delay in Specman.

eg: 

gen time_delay;

wait delay(time_delay ms);

 

However, the above lines reult in "Unrecognised exprexxio" Error.

Have any of you come across this before?

 

Thanks

Specman Baby

 

 

Parents

  • I'd add a small word of warning to this topic: asking for a "wait delay" does have a performance impact, because a callback has to be registered for the delay. If you only call the delay fairly infrequently it should not be a problem, but if you call wait delay too often (e.g. on every clock egde) then the simulation performance can be impacted.

    So use it with care, and if possible use some event-based delay mechanism rather than time-based.

Reply

  • I'd add a small word of warning to this topic: asking for a "wait delay" does have a performance impact, because a callback has to be registered for the delay. If you only call the delay fairly infrequently it should not be a problem, but if you call wait delay too often (e.g. on every clock egde) then the simulation performance can be impacted.

    So use it with care, and if possible use some event-based delay mechanism rather than time-based.

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