How can I export all the enumerated data types from m-file to an SLDD (Data Dictionary)? Can Enum be created in m-file? IF yes what's the solution for this?

Creating Enum definition in the m-file and exporting back to SLDD

Answer 1

[Manikanta Aditya]

Hello @Parambrahma,

Yes, you can create enumerated data types (Enums) in an m-file and export them to an SLDD (Simulink Data Dictionary).

1.) Create a Enum in an m-file: Create a new m-file and define your enumeration class. For example, if you want to define days of the week, your m-file (e.g., WeekDays.m) would look like this:

classdef WeekDays
    enumeration
        Monday, Tuesday, Wednesday, Thursday, Friday
    end
end

Refer to the following documentation to know more about enumation classes:

• Define Enumeration Classes

2.) Export Enum to SLDD:

1. Open or Create an SLDD: Open your existing SLDD or create a new one using the Simulink Data Dictionary Manager.
2. Add Enum to SLDD: You can add the enumerated type to the SLDD by referencing the m-file. Here’s how you can do it programmatically:

% Load the SLDD
slddObj = Simulink.data.dictionary.open('yourDataDictionary.sldd');

% Get the section where you want to add the enum
dData = getSection(slddObj, 'Design Data');

% Add the enum type definition
addEnumType(dData, 'WeekDays', 'WeekDays.m');

Refer to the following documentation to know more about 'addEnumType':

• addEnumType
• getSection

3.) Save and Close the SLDD: After adding the enum, save and close the SLDD:

saveChanges(slddObj);
close(slddObj);

I hope this helps you.

[Parambrahma]

>> slddObj = Simulink.data.dictionary.open('Demo10.sldd');

>> dData = getSection(slddObj, 'Design Data');

>> addEnumType(dData, 'Lat_SLDD_Enum', 'Lat_SLDD_Enum.m');

Unrecognized function or variable 'addEnumType'.

Getting an error on 3rd line.

Could you please elaborate on this?

[Manikanta Aditya]

Hi @Parambrahma,

It looks like you're encountering an issue with the addEnumType function. This function was introduced in MATLAB R2023b and is used to add enumerated data types to the Architectural Data section of a Simulink data dictionary.

Please ensure that you are using MATLAB R2023b or later, as the addEnumType function is not available in earlier versions

[Parambrahma]

I am using MATLAB R2024b

Answer 2

[Josh Kahn]

Hi @Parambrahma,

You can use importEnumTypes to move your class-defined enumerations to data dictionary entries. The enum class must be defined as a Simulink.IntEnumType. I included an example below for you. Let us know if you run into any other issues!

Regards,

Josh

enumFlightPhases.m

classdef enumFlightPhases < Simulink.IntEnumType
    enumeration
        Undefined (-1)
        Taxi      (1)
        TakeOff   (2)
        Climb     (3)
        Cruise    (4)
        Descent   (5)
        Approach  (6)
        Land      (7)
    end
end

saveEnumToDD.m

% Save the enumeration to the data dictionary
ddFileName = 'MyDataDictionary.sldd';

if ~exist(ddFileName, 'file')
    dd = Simulink.data.dictionary.create(ddFileName);
else
    dd = Simulink.data.dictionary.open(ddFileName);
end

importEnumTypes(dd,{'enumFlightPhases'})

saveChanges(dd)

close(dd)

[Parambrahma]

Hi Josh Kahn

I'm getting error in the enumFlightPhases.m file as follows -

>> enumFlightPhases

Error using enumFlightPhases

In definition of enumeration member 'Undefined' in class 'enumFlightPhases':

Too many input arguments.

[Josh Kahn]

To use the enum in Simulink, you must subclass Simulink.IntEnumType:

For more info: https://www.mathworks.com/help/simulink/ug/about-simulink-enumerations.html