How do I access the port width, data types, and dimensions individually for the blocks in my Simulink model from the MATLAB command line?

I would like to access the port width, data types, and dimensions individually for the blocks in my Simulink model from the MATLAB command line. I would like this to work with my bus signals as well.

Answer 1

[MathWorks Support Team]

The key to finding the signal/port dimensions and types at the command line (i.e. via m-file) is to put your model into a "compiled" state before querying the dimensions/types. During the compile phase, signal/port dimensions and data types are propagated through the model. First get your model into a compiled state (similar to a Ctrl+D or "Update Model" in Simulink):

>> myModel([],[],[],'compile')

For more on this command, you can refer to our Documentation:

https://www.mathworks.com/help/releases/R2020b/simulink/slref/model_cmd.html

Once you have your model in a compiled state, you can query particular ports for their dimensions following a workflow similar to:

https://www.mathworks.com/help/releases/R2020b/simulink/ug/determining-output-signal-dimensions.html#mw_b1ba72ba-7f2f-4511-b8eb-bba004a8f900

You can also access the port width and data type by using "get_param" with the following properties:

"CompiledPortDataType"
"CompiledPortWidth"

An example code snippet (similar to the above linked example) is below:

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

As the code snippet shows, once you finish querying your desired ports, make sure to move your model out of the compiled state and into the terminated state as:

>> myModel([],[],[],'term')