Where can I find the TLC files and S-functions for built-in Simulink blocks?

Hello.

I'm using Embedded Coder and I'm currently reading up on S-functions and TLC files. In order to understand them better, I would like to go through the TLC files of built-in Simulink blocks (and S-functions, if the blocks are implemented this way). In particular, I'm interested in the data store memory, read, and write blocks. My long-term goal would be to either customize their behavior or implement them from scratch.

Can you tell me if and where I can find the TLC files and S-functions for these blocks?

Answer 1

[Hitesh]

Hi Aleks,

TLC Files for Built-in Simlunk Blocks

• TLC (Target Language Compiler) files for built-in Simulink blocks are typically located in your MATLAB installation directory, based on the category of the block in this path "matlabroot/rtw/c/tlc" where matlabroot is the root directory of your MATLAB installation.

S-Functions for Built-in Blocks

• Most built-in blocks in Simulink are not implemented as S-functions. They are implemented internally in C++ or other languages and are not shipped as S-function source code. I believe built-in blocks like Data Store Memory/Read/Write are not implemented as S-functions, their C and TLC implementations are internal to Mathworks.

Customize or override built-in block

• You can write your own TLC files to override or extend code generation for custom S-Functions. For built-in blocks, you need to create a custom S-Function (in C, C++, or MATLAB) and write a TLC file for it, then use your block instead of the built-in one. You cannot directly modify the TLC files for built-in blocks, but you need to use the same patterns in your custom implementations.

For more information regarding the S function and TLC file, kindly refer to the following MATLAB documentation:

https://www.mathworks.com/help/simulink/sfg/s-function-examples.html

https://www.mathworks.com/help/rtw/tlc/tlc-files.html

https://www.mathworks.com/help/rtw/ug/write-wrapper-s-function-and-tlc-files.html

https://www.mathworks.com/help/simulink/slref/custom-code-and-hand-coded-blocks-using-the-s-function-api.html

https://www.mathworks.com/help/simulink/sfg/example-using-s-functions-to-incorporate-legacy-c-code.html