MATLAB: Automating Signal Storage Class in M script

How do I specify the storage class for a signal in m script? I would like to automate this process. For example, under signal properties–>RTW–>Storage Class….I would like to set the signal to Imported Extern.

Thanks in advance!

Best Answer

If you already have a Simulink.Signal object associated with the relevant signal line, then you can use code similar to what Titus suggested (just switch Simulink.Parameter with Simulink.Signal). But if you just want to operate directly on a named signal, and have the handle to the signal, you can set it using the "RTWStorageClass" property. For example, using a demo model called "busdemo":

open_system('busdemo');
ph = get_param('busdemo/Bus Creator', 'PortHandles');
set(ph.Outport, 'RTWStorageClass', 'ImportedExtern');

(The last line will error out if you do not have a signal name, in which case you may set that using the SET command for the SignalName property)

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MATLAB: How to create signals that have specific attributes in Simulink 7.4 (R2009b)

To assign and validate signal attributes in a model, use the Simulink.Signal class to define a signal object in the MATLAB workspace. This will allow you to define your signal with specific attributes. You can also use this signal object to initialize a signal in your model. To do this, follow these steps:

1) Define a Simulink.Signal object in the workspace:

mySig = Simulink.Signal
mySig.RTWInfo.StorageClass = 'ExportedGlobal'  % Set its storage class to 'ExportedGlobal'
mySig.InitialValue = '10' % Set the signal's initial value

2) In your model, select a signal to validate against MySig object. Right click on a signal, choose signal properties and name the signal as mySig. Check the 'Signal name must resolve to Simulink.Signal object' option.

To learn more about Simulink.Signal objects, please refer to:

https://www.mathworks.com/help/releases/R2012b/simulink/slref/simulink.signal.html

MATLAB: Simulink.Parameter Trouble

Do you mean that you want to create a Simulink.Parameter object that has the same name as that of the input argument in its caller workspace? In other words, if I invoked your function using CheckA2L(someObj) from the base workspace, you need an object called "someObj" created? If yes, you can use the inputname function as follows:

function CheckA2L(Signal)
  %%%%%%Check to see if signal in a2l file
  A = ehooks_get_msmtvariable_properties(Signal);
  if isempty(A) && strcmp(const_value(1),'K')
    Signal = Simulink.Parameter;
    Signal.Value = 1;
    Signal.StorageClass = 'ImportedExtern';
    eval([inputname(1) '=Signal;']);
    save('MissingCals',inputname(1),'-append')
  end

Best Answer

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MATLAB: How to create signals that have specific attributes in Simulink 7.4 (R2009b)

MATLAB: Simulink.Parameter Trouble

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