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Extract all symbols/nets from a design

serpens

Hi, I'm new with SKILL, I try to do some code and it works, but as I trying to go deeper I found some issues. I start to work with the database and as a exercise I want to extract all reference designators (or net names) from a board.

However, I was looking trough Allegro® User Guide: SKILL Reference but can not find nothing. I don't want from you to give me the code, I just need some advice in some methodology how to extract such things from database.

I found only this axlExtractMap (there is an example how to extract all net names) but if I understand it correctly it use already existing report files and I looking fore something without external files.\

Regards,

Miro

  • Thank, but maybe I don't write it good. I need to go through all nets and check which of them have the component. It will be something like testpoint report. This is why I want to start from top (design), get the list of all nets, in here check for all pins connected to each net and decide if the pin is or isn't from a testpoint.

  • If that is your goal, you can start with nets and use net parameters to check if it is from a testpoint. net object covers or contains objects such as vias, clines and shapes. Using the net parameters, you can get almost all of the informations from this objects connected to the net.

  • I must say, the symbol what I'm looking for is not a regular TP. In our company we use TP in schematic, and as I was informed from Casdence Support, there is no way how to have TP in scm and auto place them in PCB, or vice versa. So because we use TP as symbols in scm (represented in pcb like a single SMT pad) I want to check all nets if they are connected to partst with TPxxx refdes and make some kind of report.

    If somebody knows some skill routine where I can look for something similar I will be glad to look at it.

    Regards,
    Miro

  • If all TP that is used as symbol names starts with "TP" then you can use string manipulations to filter and check if it is connected to the net.. try to follow this routine.

    lets say you store the symbol names to variable symbolName and symbolIsTP determines if it is a TP component(given that all TP components in your design starts with TP)

    symbolIsTP = substring(symbolName 1 2) == "TP"

    If symbolIsTP = t then it is a TP symbol

    If symbolIsTP = nil then it is not..

     Hope this helps.

  • Did you mean something like this?

    moRef = axlDBGetDesign()->symbols~>refdes

    foreach( moVar moRef
    moX = substring( moVar 1 2)
    if( moX == "TP"
    printf("%s - TP \n" moVar)
    printf("%s - not TP \n" moVar)
    );end if
    );end foreach

     

    But this just filter out TPs from a list of reference designators. What I want to achieve is:

    - obtain a list_1 of nets used in current design (done)
    - list_2 of redfdes of symbols for each net which are connected to this net (strugling)
    - check in list_2 if some of the refdes are TP, if yes net have a TP, if no net dont have a TP (done)

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