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Cadence 5: Change path width with bindkey

frogconsultant

Without the possibility to change the default width to the correct value in the PDK, I am trying to develop a bindkey in cadence 5.1.41 which will do the trick.

hiSetBindkey("Layout" "<Key>F11" "leHiEditProp() width->value=130")

After selection of the path, I am hitting the "F11" I have the property form opening but the following is not interpreting. Does someone know how to affect the width after that?

Best regards

  • Bonjour Frogconsultant ;-)

    hiSetBindKey("Layout" "<Key>F11" "geGetSelSet()~>width=1.30")

    (I assume you didn't really want to set it to 130um?).

    This will change the width of all selected paths. In fact if you have things other than paths selected, it will add a width property on them too (which might not be desirable). If you want to restrict it to paths, you could do:

    hiSetBindKey("Layout" "<Key>F11" "setof(obj geGetSelSet() obj~>objType==\"path\")~>width=1.30")

    Regards,

    Andrew.

  • Dear Andrew,

     As usual it works first time. Thanks.

    I thought I have to open the edit property form and after affect the fields like I have done with the via form to have a bindkey creating me a via by default as it could not be changed in the pdk definition.

    Best regards,

  • is it possible to change the default layer width when you draw a path? for example, when i draw metal1, the default is .24um, can i make it to .5um as the default path width? in the old ic5.0. i think you could do this.

  • It is generally recommended to use the create wire command to create so-called pathSegs (path segments) in 6.1.x. There are lots of advantages over paths. Check the docs for this.

    But anyway, there is an environment variable that you can set:

    Put this in your .cdsenv file:

    layout  pathWidth       float   0.5

    Hope this helps

    Colin

  • Hi Colin, is this for all path(s)? or can i specifically do it per specific layer? this is what i used to do in the old ic5.0.

  • Hi imaneet,

    I believe you may be correct.

    The create path command has been simplified (and superseded by the create wire command).

    Also, you  may have noticed that it is not possible to change layers anymore with the create path command.

    I assume you are using VLS-L.

    If you are using VLS-XL there are lots of different ways that can be achieved by invoking the Wire Assistant but it is not available in "L"

    So, assuming you are using L:

    Use the create wire command (create wiring-> wire) , it will remember any new widths you use when changing layers.

    You can change the values with (R.M.B) change width, and the different values will be remembered.

    You can also change layers automatically with the space bar (auto generates a via) or RMB via up/down.

    Hope this helps

    Colin

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