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How to write a simple CMXL code that retrieves or edits data from Constraint Manager

JuanCR

Imagine you want to access some constraint values using SKILL. I know there are AXL functions available; However, what if you want to use CMXL because it dives deeper into the Constraint Manager capabilities. 

Let's show an example. Let's set static phase values of a differential pair configuration. This is how the code would look like: 

axlCMDBInit()
dsn = cmxlFindObject(ACNS_DESIGN);

when(dsn
    cmxlDBSkillInit(dsn);
    cset = cmxlFindObject(ACNS_ECSET, "DIFF", dsn);
   
    when(cset
        println(cmxlPutAttribute(cset "DIFFP_PHASE_TOL" ACNS_STRING list("0.5")))
        println(car(cmxlGetAttribute(cset "DIFFP_PHASE_TOL" ACNS_STRING))); should return 0.5mm
    )
)

cmxlDBSkillExit(dsn);

Here's a brief explanation of what each section is doing: 

If the same logic is used with any other attribute name, you can construct the new code to edit a different constraint. Make sure you use the right Object type with cmxlFindObject. You can find all the object types and definitions at the end of the CMXL Reference Manual. 

Feel free to ask any questions!

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