How to use Simulink.B​us.createM​ATLABStruc​t function with Simulink Data Dictionaries

I have a Simulink Constant Block where the value is

Simulink.Bus.createMATLABStruct('myBus');

in order to create a Simple test-harness.

If the bus-object for 'myBus' is in the base-workspace then it works. However, if the bus-object is defined (solely) in a linked data-dictionary then it does not.

Answer 1

[Ivan]

you can also try next code:

dd_name=get_param('Model Name','DataDictionary');
scope = Simulink.data.DataDictionary(dd_name);
pStruct=[];
dims=[1,1];
obj='BUS_NAME';
BUS_NAME_MATLABStruct = Simulink.Bus.createMATLABStruct(obj, pStruct, dims, scope);

Answer 2

[Robert Simpson]

I also have this issue. Automatically created test harnesses try to set initial condition of ZOH blocks by running Simulink.Bus.createMATLABStruct('.....'); in the mask of the signal spec block. But this fails.

Answer 3

[simon pierce]

I have created the following function as a stopgap.

function myStruct = CreateMatlabStructDD( busName , partialValues ) 
% this function relies on the bus-object being specified in the simulink
% data dictionary

% get this models data dictionary
dataDictionaryFile = get_param(gcs, 'DataDictionary');

% create a data dictionary object 
slddObject = Simulink.data.dictionary.open(dataDictionaryFile);

% get the design data section
section = getSection(slddObject, 'Design Data');

% get the buses
entries = find(section, '-value', '-class', 'Simulink.Bus');

% find the one we want 
myBus  = find(entries, 'Name', busName);

% turn in ot a cell array 
myBusCell = getValue(myBus);

% assign in to the base workspace, with the same name as in the
% data-dictionary
assignin('base', busName, myBusCell);

% create the structure with Mathworks createMATLABStruct function, which is
% possible now that it is in the base workspace
myStruct = Simulink.Bus.createMATLABStruct( busName, partialValues );

end