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  3. Create a Via with the same parameters as what "auto" option...

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Create a Via with the same parameters as what "auto" option provided on the "Create Via Form"

Yanhong
Yanhong over 11 years ago

Hi there,

I am very new to this community. I am trying to implement creating via automatically using skill code. Thanks for all the information that you provided. I was able to place the via wher I want using skill code. However, in terms of the VIA params, I would like to create a via with the same parameters as what "auto" option provided on the "Via form". The auto via will cover all overlap area and extend over a little bit. Also, it won't violate the DRC rule, etc. I tried to use lxComputeViaParams for the viaDef that from tech file, but it didn't give much info. Is there any SKILL function to do that? 

Thanks,

Yanhong

            tf=techGetTechFile(cv)
            viaDef=techFindViaDefByName(tf viaDefName)
            via_center_point_x=(car(viabox_ll)+car(viabox_ur))/2
            via_center_point_y=(cadr(viabox_ll)+cadr(viabox_ur))/2
            via_center_point=list(via_center_point_x via_center_point_y)

            viaParams=list(list("cutRows" evalstring(cutRows)) list("cutColumns"     evalstring(cutColumns)) )

            ;viaParams=append(viaParams lxComputeViaParams(viaId cv viaParams))
            existing_via=setof(z dbGetTrueOverlaps(cv list(viabox_ll viabox_ur)) rexMatchp("Via" z~>objType)==t)
            if(existing_via
              then
              printf("There is an existing VIA. No Via will be created.\n")
            else
              if(viaDef
                via0=dbCreateVia(cv viaDef via_center_point "R90" viaParams)

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  • Andrew Beckett
    Andrew Beckett over 11 years ago

    lxComputeViaParams is the right function to use, although in your commented out code, you appear to have omitted the constraint group name.

    Andrew.

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