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How to get the net-figure which is connected to a specific instance terminal

MLindig

Hi,

I want to hilight only a part of a net (mainly the part from instance terminal to next branch of net). Here is an example:

I want to hilight the net part from transistor "M0" drain terminal which is connected on net "knt". I picket up the right terminal from

term = dbFindSigByName(cvId "knt")~>memInstTerms

term->net->figs contaions now all figures of the connected net. Which is the right figure (connected to term) which I could pass to geAddHilightFig(hlSetId fig) function?

 Thanks Michael

Parents

  • Michael,

    Assuming you have an instTerm object for the M0/D terminal (arrived at via sig~>instTerms or sig~>memInstTerms - depends on if you need to handle iterated instances and busses, say):

    instTerm~>term~>pins

    will give you list of the pin objects for that terminal. For a transistor there will typically only be a single pin - you could potentially have more than one pin - so it's up to you whether you need to loop around the pins or just deal with the first one. 

    pinObj=car(instTerm~>term~>pins)
    pinFig=pinObj~>fig 

    This will give you the shape for the pin. Strictly in OA you should look at pinObj~>figs which is a list of all the strongly connected pin shapes, but this is not used in symbols at the moment - maybe one day - but ~>fig will always give you one of the figures if there are more than one (in CDB versions there was only a single figure on a pin anyway).

    If you looked at pinFig~>bBox it will give you the bounding box of the pin figure, but that will be in the coordinate system of the transistor symbol. So you'd need to transform it:

    pinBBox=dbTransformBBox(pinFig~>bBox instTerm~>inst~>transform)

    Hopefully that helps!

    Regards,

    Andrew

     

Reply

  • Michael,

    Assuming you have an instTerm object for the M0/D terminal (arrived at via sig~>instTerms or sig~>memInstTerms - depends on if you need to handle iterated instances and busses, say):

    instTerm~>term~>pins

    will give you list of the pin objects for that terminal. For a transistor there will typically only be a single pin - you could potentially have more than one pin - so it's up to you whether you need to loop around the pins or just deal with the first one. 

    pinObj=car(instTerm~>term~>pins)
    pinFig=pinObj~>fig 

    This will give you the shape for the pin. Strictly in OA you should look at pinObj~>figs which is a list of all the strongly connected pin shapes, but this is not used in symbols at the moment - maybe one day - but ~>fig will always give you one of the figures if there are more than one (in CDB versions there was only a single figure on a pin anyway).

    If you looked at pinFig~>bBox it will give you the bounding box of the pin figure, but that will be in the coordinate system of the transistor symbol. So you'd need to transform it:

    pinBBox=dbTransformBBox(pinFig~>bBox instTerm~>inst~>transform)

    Hopefully that helps!

    Regards,

    Andrew

     

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