When generating an s-function from a simulink block, can I select fields within an input structure to make them tunable parameters which show up within the s-functions mask?

I'm really just curious if there is a simple way to make tunable parameters from individual fields within structures that are passed into a simulink block when generating an s-function. What I'm looking for is something analgous to how you would normally select an input as a tunable parameter when generating an s-function, which then shows up in your s-functions simulink block mask. However, with passing workspace structures into the simulink block, it seems like you can select the structure as tunable and the generated code seems to provied a path to make the underlying fields tunable. However, I can't seem to find a simple way for this structure information to show up within my mask, that is, without having to do some code editing and recompiling, which I'm trying to avoid.

Answer 1

[Benjamin Thompson]

It seems possible, according to this article in the Mathworks documentation, "Organize Data into Structures in Generated Code".

Your comment about passing individual fields of a structure to an S-Function as tunable parameters could be problematic, as I seem to remember that the "." operator was in the list of operators making an expression non-tunable. Right now I cannot lay my mouse on that article in the documentation. If you have success please post a followup comment.

[Jeremy Bauman]

Like you mention, I also believe it is possible (though untested by me) to edit the generated code and recompile to make underlying structure fields tunable. However, I was hoping there might be a very simple streamlined (click a button, check a couple boxes) way to make those structure fields tunable. But you also correctly point out that the "." operator is a category 4 operator, which is not supported as mentioned in the documentation "Limitations for Block Parameter Tunability in Generated Code". Thanks for the reply. Hopefully this might be something possible in the future.