MATLAB: How to get the port types and dimensions for a block

rtw port dimension typesimulinksimulink coder

We are generating code using RTW via a script. I am trying to collect the port dimensions and data types. Argument names would be great too, but not required.

I am currently able to get the port names

Best Answer

Sometimes it is hard to find help in the document. Many times I just poke around and make an educated guess. I made a simple model and ran the code below. It seems to be able to get the dimension and data types. Hope this will help.

clc;
acModelName=bdroot;
lcInportHandles = find_system(acModelName,'FindAll','On','SearchDepth',1,'BlockType','Inport');
  for i=1:length(lcInportHandles)
    lcInputDimensions = get_param(lcInportHandles(i),'CompiledPortDimensions');
    lcInputDimensions=lcInputDimensions.Outport
    lcInputDataTypes = get_param(lcInportHandles(i),'CompiledPortDataTypes');
    lcInputDataTypes = lcInputDataTypes.Outport
end

The output looks like this:

lcInputDimensions =
       1     2
lcInputDataTypes = 
      'single'
lcInputDimensions =
       1     1
lcInputDataTypes = 
      'int8'

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MATLAB: How to programmatically access (and edit) bus elements

I wanted to throw a brief update out there about what I ended up with. Thanks to Shivang Menon @ mathworks for some technical support and guidance to use arrayfun & cellfun, I ended up getting there. I won't post all the code I went through because it was scattered across several functions, but here are the key parts to accessing the element names:

sldd_object = Simulink.data.dictionary.open('filename.sldd');
section = getSection(sldd_object, 'Design Data');
entries = find(section, '-value', '-class', 'Simulink.Bus');
% produce cell array of Simulink.Bus objects:
buses = arrayfun(@(x) getValue(x), entries, 'UniformOutput', false); 
% produce a cell array of cell arrays of Simulink.BusElement objects:
elements = cellfun(@(x) x.Elements, buses,  'UniformOutput', false); 
% produce a cell array of cell arrays of element names:
element_names = getElementNames(elements); 
function names = getElementNames(arrayOfElements)
%%getElementNames returns a cell array of element names
    function names = busElementNames(busElement)
      if (length(busElement)<1)
        errordlg('There is a bus with zero elements. Oops.')
      elseif (length(busElement)==1)
        names{1}{1} = busElement.Name;
      else
        names = arrayfun(@(x) x.Name, busElement, 'UniformOutput', false);
      end
  end
  names = cellfun(@busElementNames, arrayOfElements, 'UniformOutput', false);
end

MATLAB: How to access the port width, data types, and dimensions individually for the blocks in the Simulink model from the MATLAB command line

You can access the port width, data type, and dimensions of individual blocks in a Simulink model by using the GET_PARAM function and the following properties:

"CompiledPortDataType"

"CompiledPortWidth"

"CompiledPortDimensions"

The simulation has to be running or compiled in order for the above properties to return the correct value. You can "compile" the model and then use the GET_PARAM command as follows:-

modelname([],[],[],'compile')
q=get_param(gcb,'PortHandles');
get_param(q.Inport,'CompiledPortDataType')
get_param(q.Inport,'CompiledPortWidth')
modelname([],[],[],'term')

where modelname is the name of your Simulink model.

Best Answer

Related Solutions

MATLAB: How to programmatically access (and edit) bus elements

MATLAB: How to access the port width, data types, and dimensions individually for the blocks in the Simulink model from the MATLAB command line

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