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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 Andrew,  

    Let me to try to be precise as to what I'm trying to do.

    I want to edit a schematic by redrawing nets on all bulk terminals but since the net names need to be same after redrawing, I extract information from the original schematic before deleting the original nets on these instances.

    My algorithm would be:

    foreach instance
    (
    find the bulk terminal from the instTerms
    (
    save net name from wire connected to the bulk
    delete the net on the bulk terminal
    function call to draw new net with the same net name
    ))

    To delete the bulk net, I use schDelete() and I delete the figs attribute of the net which gives me a warning saying,
    dbGetq: object is a purged/freed object - db:0x158bb9c4

    and I want to avoid this or do the task in some other way. 

    Thanks.


     

Reply

  • Hi Andrew,  

    Let me to try to be precise as to what I'm trying to do.

    I want to edit a schematic by redrawing nets on all bulk terminals but since the net names need to be same after redrawing, I extract information from the original schematic before deleting the original nets on these instances.

    My algorithm would be:

    foreach instance
    (
    find the bulk terminal from the instTerms
    (
    save net name from wire connected to the bulk
    delete the net on the bulk terminal
    function call to draw new net with the same net name
    ))

    To delete the bulk net, I use schDelete() and I delete the figs attribute of the net which gives me a warning saying,
    dbGetq: object is a purged/freed object - db:0x158bb9c4

    and I want to avoid this or do the task in some other way. 

    Thanks.


     

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