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Thread: Scripting - automating tasks in the V8 editor

  1. #1
    EFILive Developer Site Admin Blacky's Avatar
    Join Date
    Mar 2003

    Default Scripting - automating tasks in the V8 editor

    The V8 editor supports the scripting language called Lua (
    The Lua scripts can be used to automate almost any task that you can do manually with the V8 editor.
    See Appendix C of the EFILive command line reference document for more information about scripting.

    You may automatically create a script based on the differences between two tune files using the [Create] button on the [F3: Tune]->[F9: Scripting] tab page - while you have two files open for comparison.
    The created script can then be used to set the alternate file's calibrations to match the base file's calibrations.

    All values that are read/written from/to the tune calibrations must be in metric units.
    To convert between units use the _efiConvertValue function.

    When comparing floating point values, rounding errors can cause comparisons for equality to fail when values are so close that they should be considered equal.
    To compare floating point values EFILive recommends using the _efiCompareFlaot() function.

    Example script to show how to use the _efiConvertValue() and the _efiCompareFloat() functions:

    if ( _efiCompareFloat(val1,val2,0.0001) ) then
      print("Same at 4 decimal places")
      print("Diff at 4 decimal places")
    if ( _efiCompareFloat(val1,val2,0.001) ) then
      print("Same at 3 decimal places")
      print("Diff at 3 decimal places")
    kpa = 100
    psi = _efiConvertValue(kpa,"kPa","badunitname")
    if ( psi==nil ) then
      print(EFI_ErrMsg.." kpa -> badunitname")
    kpa = 100
    psi = _efiConvertValue(kpa,"kPa","psi")
    if ( psi==nil ) then
    print(kpa.." kPa = "..psi.." psi");
    Output when this script is run:
    Diff at 4 decimal places
    Same at 3 decimal places
    Error: $0806: tleNoConversion kpa -> badunitname
    100 kPa = 14.50377 psi
    Script returned: $0000 (0)
    Last edited by Blacky; September 25th, 2020 at 03:01 PM.
    Before asking for help, please read this.

  2. #2
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003


    A function for comparing float's is a very good idea

    ( 0.1 * 10 != 1.0 )

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