In Simulink I would like to use a "classdef object" in stead of a struct to initialise a bus signal

This user defined class:

classdef s_class
    properties
        a=7     
    end
end

And a corresponding bus signal in Simulink:

elems = Simulink.BusElement;
elems.Name = 'a';

s_Bus = Simulink.Bus;
s_Bus.Elements = elems;

To initialise this bus signal (for instance in a Constant block) in Simulink we can use struct('a',7).

Is it possible to use s_class in stead?

Answer 1

[Wim Vaassen]

Hi Animesh,

I understand that initialization with s_class is not possible in Simulink, although from the outside it still seems to contain the same data (type and value) as in a corresponding struct s. Maybe something for a next version.

In any case, thanks for your quick response.

Greeting,

Wim.

Answer 2

[Animesh]

Hey @Wim Vaassen !

Unfortunately, it is not possible to use s_class directly as an initialization for a Simulink bus signal.

Bus signals in Simulink require elements to be defined as structures. While s_class is a class definition in MATLAB and a class object instantiated from s_class would not be directly compatible with Simulink busses.

You will need to convert the instance/object of s_class into a struct to use it as an initial value for a bus signal.

One way to achieve this is by defining a method in your s_class that returns an equivalent struct object.

For example, you could add the following method to your s_class definition:

 methods
        function s = asStruct(obj)
            s.a = obj.a;
        end
    end

Then, you could initialize the bus signal like this:

    s_obj = s_class;   % Create object of s_class
    busInitVal = s_obj.asStruct; % Convert object to struct

The busInitVal struct can then be used as the initial value of the bus signal in Simulink.