Dynamic array creation in s-function builder.

Hello everyone,

I'm trying to build an s-function that can accept an array of a varying size, using the s-function builder block. As instructed in the 'Help', I made the number of rows equal to '-1' in the Data Properties -> Input Ports.

However, this is giving an error that says 'ERROR: Invalid setting for the input port dimensions' .

So is there a way to solve this problem? Or is it better to modify the generated C code and make the particular input dynamically sized?

Answer 1

[Kaustubha Govind]

As per the limitations of S-function Builder listed in the documentation:

    Does not support the following S-function features:
        * Dynamically-sized input and output signals for an S-function with multiple input and output ports 

    Note: S-functions with one input and one output port can have dynamically-sized signals

So if you do have multiple inputs/outputs, the error makes sense. I do think it be might be better to modify the generated S-function wrapper as you mentioned.