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delete existing wire from a terminal and redraw a new one.

AdeshNamekumar

I'm trying to redraw all nets on the bulk terminal of all instances by deleting exisiting nets after extracting information about the net label name from them. I have the working SKILL to redraw the nets at the bulk terminal but I'm having trouble deleting the existing nets. 

if cvSch stores the cellView id. 
This is what my snippet looks like:

BulkSignals = "x y z"
BulkSignals = parseString(BulkSignals)

foreach(biasinst cvSch~>instances

; loop through all the terminals of each instance
foreach(myTerm biasinst~>instTerms
if( ( myTerm~>name == "B" ) then
biasnet = myTerm~>net~>name

if((setof(x BulkSignals (x == myTerm~>net~>name)) != nil) then
foreach(fig myTerm~>net~>figs
if(((setof(x BulkSignals (x == fig~>net~>name) ) != nil) && fig~>children != nil) then

schDelete(fig)

function call to draw the new net
)));all loops end here

The problem in using and deleting "figs" is that it has all instances of the same net name rather than just the one specific to the instance I'm presently looking at. As a result, I'm deleting 'n' number of wires at once instead of just one,

I did find a work around by including the fig~>children condition to but now I see warnings as follows:
dbGetq: object is a purged/freed object - db:0x158bb9c4

Is there an easier way I can do this? I've seen a couple of related posts but can you be more specific?


Thank you,
Adesh

Parents

  • Hi Adesh,

    I have not investigated this but you could try setting the "net" attribute of the instTerm - however if I recall correctly, if you set just the net in a schematic and don't update any associated label, then Check & Save will re-assign connectivity based on the label, not the net db object.  You could find the physical wire that is overlapped by the instTerm and then find the one associated label and update that - use dbGetOverlaps() to find the 'line' db object that represents the wire and then you should be able to find the attached/associated label (or textDisplay?).

    Hope this helps!

    Lawrence.

Reply

  • Hi Adesh,

    I have not investigated this but you could try setting the "net" attribute of the instTerm - however if I recall correctly, if you set just the net in a schematic and don't update any associated label, then Check & Save will re-assign connectivity based on the label, not the net db object.  You could find the physical wire that is overlapped by the instTerm and then find the one associated label and update that - use dbGetOverlaps() to find the 'line' db object that represents the wire and then you should be able to find the attached/associated label (or textDisplay?).

    Hope this helps!

    Lawrence.

Children
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