I am trying to write a simple SKILL script to do the following:
1. Look for a particular output port in symbol A,
2.Follow the net connected to this port and the input of symbol B
3.Report the outputs of symbol B.
Please let me know if there are predefined function that do some kind of a read port, find connected net tasks. I am very new to SKILL and would greatly appreciate any help.
Sorry, I dont think that was a clear request at all. I want the script to open a given schematic, locate a symbol (A), follow a net connected to one particular output port(say X), follow that net to another symbol (B) and then report B's outputs.
THe algorithm ,you can see is fairly simple but I can't seem to locate the functions to do the following tasks
Read ports of a symbol in a given schematic
Check for a matching net name on the port of another symbol
There is not one particular function to do what you are looking for. You will need to do it in pieces.
To open your schematic:;In the following, you must provide the libName cellName and viewNamecv = dbOpenCellViewByType("libName" "cellName" "viewName" "schematic" "r")
;In this example, it simply uses the current cellview that is opencv = geGetEditCellView()
To find your cell or instance:Next, you need to find your symbol. You said you want to find symbol A. If A is the cellName, you could have more than one placement of it. You could get all placements of cell A this way:insts = setof(x cv~>instances x~>cellName=="A")Since insts will be a list, you will need to loop through the list:foreach(inst insts do something with inst)
Or, if your instance is named A, you could find the instance this way:inst = dbFindAnyInstByName(cv "A")
To get the connection to X on the instance:;since setof returns a list, we need the first (only) item on the list using carinstTerm = car(setof(x inst~>instTerms x~>term~>name=="X"))
To follow the net connected to the terminal:net = instTerm~>net;From here you can see all instance terminals that the net connects with. We want all except the one where we startedconns = setof(x net~>instTerms neq(x instTerm));If we want instance B's instance terminal onlyinstTermOnB = car(setof(x net~>instTerms x~>inst~>name=="B"))instB = instTermOnB~>inst
To get the outputs on B:outputTerms = setof(x instB~>master~>terminals x~>direction=="output")outputTermNames = outputTerms~>name
To see all the attribute names on a database object in your CIW:cv = geGetEditCellView()cv~>?To see all attributes and their values:cv~>??
To speed things up when coding/debugging, you can select an item in your schematic and get its object id like this:obj = car(selectedSet())orobj = css()Take a look at this post to find some other tips. In particular, the last posting has a link to a dataBrowser.il file that is very useful for graphically traversing database objects, their attributes and their values./forums/p/3600/3605.aspx#3605