TLC File Level-2 MATLAB S-function

I got a Problem with writing a TLC-File of a Level-2 MATLAB S-function.

I wrote the .m File for the S-function and started the Simulink Model with the Run Button. So far all works well. But now I want to transfer the Model to my Beaglebone Black, so I have to write a TLC File. I looked at the timestwo.tlc example to get Basics in writing an TLC File. In this example is in the TLC File and in the .m File for the S-function the input multiplied by two and transferred to the output. Now my question is if there is a way to get the Values direct from the Simulink Block without implementing the functionality a second time in the TLC File?

Such as:

output_tlc = output_simulink_block

I hope you can understand my Question :-)

Thanks for your Help

Answer 1

[Kanishk]

Hi @Simon Assfalg

If you are looking to directly utilize the output from an S-Function block within a TLC (Target Language Compiler) file, you can streamline this process by writing your algorithm in a C file. This approach involves creating a wrapper S-Function that calls your algorithm, thereby minimizing the overhead typically associated with S-Functions.

At the top of your TLC file, specify the implementation of your algorithm using the "%implements" directive.

%implements "my_alg" "C"

This line tells the TLC file to use the C implementation of your algorithm named "my_alg".

You can then call your algorithm directly within the "Outputs" function of the TLC file. Here’s an example of how to set this up:

%function Outputs(block, system) Output
  
  %assign outPtr = LibBlockOutputSignalAddr(0, "", "", 0)
  %assign inPtr = LibBlockInputSignalAddr(0, "", "",0)
  %assign numEls = LibBlockOutputSignalWidth(0)
  
  my_alg(%<inPtr>,%<outPtr>,%<numEls>);
  
%endfunction

You can learn more about writing wrapped inline S-Function using TLC from the documentation linked below.

https://www.mathworks.com/help/rtw/tlc/inlining-s-functions.html#f34660