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NuvKFC's avatar
NuvKFC
Icon for Contributor rankContributor
4 years ago

How to use "set_max_skew" constaint?

As title. I had try set_max_skew command for following design. But it doesn't work. And there is nothing to be reported by report_max_skew command in TimeQuest. How to know that following const...
Nurina's avatar
Nurina
Icon for Regular Contributor rankRegular Contributor
4 years ago

Hi,


Your syntax is wrong. The arrangements should be like below:

set_max_skew [-h | -help] [-long_help] [-exclude <Tcl list>] [-fall_from_clock <names>] [-fall_to_clock <names>] [-from <names>] [-from_clock <names>] [-include <Tcl list>] [-rise_from_clock <names>] [-rise_to_clock <names>] [-through <names>] [-to <names>] [-to_clock <names>] <skew>


For more information you can enter set_max_skew -long_help or refer here: https://www.intel.com/content/www/us/en/programmable/quartushelp/13.0/mergedProjects/tafs/tafs/tcl_pkg_sdc_ext_ver_1.0_cmd_set_max_skew.htm


You could also try generate the command through GUI. On Timing Analyzer go to Constraints>Set Max Skew and you can edit the details.


Regards,

Nurina


  • NuvKFC's avatar
    NuvKFC
    Icon for Contributor rankContributor
    3 years ago

    Hi Nurina

    Thank you, Nurina, very much. You said the syntax is wrong. it means I can't use list command which Tcl command?