Passing strings between subsystems

Hi,

I'm building up strings dynamically in several subsystems, both using Embedded Matlab blocks and Level-2 M-File blocks. Now, my problem is that I would like to pass these strings to a custom-made interface block. The only solution I was able to find so far was to split the strings into an array of ASCII codes, pass them to the interface module then re-contruct the string in that module. Needless to say that , although it works, it is not the most elegant solution.

I was wondering if somebody would have a better idea as of how to solve this problem in a more elegant way? The resulting model will be used by RTW-EC to generate embedded code out of it.

Many thanks in advance!

Answer 1

[Desiree]

Passing the ASCII representation of characters is one way to achieve this. However if Level-2 MATLAB S-Functions are used you won't be able to generate code with Embedded Coder anyway (only if you inline the function). A better way would be to use C Code S-Functions. One example on how to pass character arrays between 2 S-Functions written in C can be found on the MathWorks website: http://www.mathworks.com/support/solutions/en/data/1-Z5HKT/index.html The main idea here is to pass a pointer to the character array through Simulink signals.

[Macko]

Thank you!

Answer 2

[Walter Roberson]

I do not have experience myself in those products, but my recollection from a Question several months ago is that it was said that there is no direct support for passing strings through a model, and that the indirect mechanism was the one you arrived at, converting the characters to numeric form.

[Macko]

Thank you! It's good to know I'm not completly off track :)