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Setting xSnapSpacing and ySnapSpacing in .cdsenv not taking effect

dr3patel

Tool: Cadence Virtuoso ICADVM20.1-64b.500.24. 

Hi,

I am trying to pre-set the xSnapSpacing and ySnapSpacing values for layoutXL to the desired values (i.e. 0.001) by loading the customized .cdsenv file from the .cdsinit. However, every time I open the layout SnapSpacing values get set to default values.

Every time I open LayoutXL I have to manually go to the Display options and set the xSnapSpacing and ySnapSpacing options manually. The next time I open the same cell view layout, I have to set that again as it doesn’t save these settings.

I have tried following things to fix this but none of them has resolved my issue.

1. I have included "setenv CDS_LOAD_ENV addCWD" into my ~/.cshrc file

2. Also, included envLoadFile("./.cdsenv") in my ./.cdsinit file located at my cadence home directory. 

3. My ./.cdsenv file located in my cadence home directory contains the following lines to set the snap spacing.

layout ySnapSpacing float 0.001

layout xSnapSpacing float 0.001

4. Furthermore, I also tried envSetVal("layout" "xSnapSpacing" 'float 0.001) and envSetVal("layout" “ySnapSpacing" 'float 0.001) from the virtuoso command line which returns ’t’  but doesn’t take the effect in the LayoutXL nor in the LayoutEXL.

Looking for a solution to fix this issue. Thanks!

Parents

  • What's likely to have happened is that (at some point) somebody has saved the settings to the cellView you're using, or the library or technology library. These will take priority over the cdsenv setting - the priority order is:

    1. cellView
    2. library
    3. technology library
    4. cdsenv

    For the cellView, if you do File→Properties in the layout editor - if there's an xSnapSpacing/ySnapSpacing property you can delete them or change them.

    For library/technology library, in the library manager over the name of the library do Right Mouse->Properties and see if there's a property called viewProps with an EXPAND button next to it (this means it's a hierarchical property). If so, press "EXPAND" and then you may see a property called maskLayout (again with an EXPAND button). Click on this EXPAND and then you should see relevant display/edit option properties like xSnapSpacing/ySnapSpacing which you can edit or delete.

    Andrew

  • in reply to Andrew Beckett

    Dear Andrew,

    Your suggestions for the cell view seem to be working well, thanks. However, I need to do that manually for every cell view so looking for a general solution i.e. at the library level.

    I attempted your suggestions for the library by following the "Right Mouse->Properties and see if there's a property ..." However, this only shows me the library property in "viewing" form in plain text (i.e. there was nothing 'clickable' or 'expandable'). Am I missing something? Let me know. 

    Dhruv

  • in reply to dr3patel

    Dhruv,

    I'd be rather surprised if the display options have been saved to every cellView (that's not normal practice in my experience), but if they have been saved to the cellView, fixing it at the library level won't help you (as I mentioned before, the cellView setting wins over the library setting).

    If you only have the "Library Property Viewer" window displayed, that means that either the library properties are readonly, or there are no properties. The first might be because its design managed. You can use the Edit menu of the viewer window to change that. However, if there are no properties set on the library, there's little point in doing this - the cdsenv would win if there are no properties on the cellView, library or technology library.

    Andrew

Reply
  • in reply to dr3patel

    Dhruv,

    I'd be rather surprised if the display options have been saved to every cellView (that's not normal practice in my experience), but if they have been saved to the cellView, fixing it at the library level won't help you (as I mentioned before, the cellView setting wins over the library setting).

    If you only have the "Library Property Viewer" window displayed, that means that either the library properties are readonly, or there are no properties. The first might be because its design managed. You can use the Edit menu of the viewer window to change that. However, if there are no properties set on the library, there's little point in doing this - the cdsenv would win if there are no properties on the cellView, library or technology library.

    Andrew

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