LibSystemO​utputCusto​mCode() return function inlining error

Hi,

I am aiming to insert a custom code at the begining of model_step()function in an ert system with CodeFormat as "Embedded-C"

for example;

/* Model step function */
void ARM_R5_step(void)
{
---->   /* Here I want to Insert my code */
  
  boolean_T rtb_equal_to_count;

  /* Sum: '<S1>/Sum' incorporates:
   *  Constant: '<S1>/INC'
   *  UnitDelay: '<S1>/X'
   */

  /* End of Switch: '<S1>/Switch' */
    
}

and I have my custom_file_process.tlc file as follow;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Abstract:
%%   Example Embedded Coder custom file processing template.
%%
%%   Note: This file can contain any valid TLC code, which Embedded Coder
%%   executes just prior to writing the generated source files to disk.
%%   Using this template "hook" file, you are able to augment the generated
%%   source code and create additional files.
%%
%% Copyright 1994-2021 The MathWorks, Inc.
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%selectfile NULL_FILE

%%  Uncomment this TLC line to execute the example
%%   ||   ||
%%   ||   ||
%%   \/   \/
%assign ERTCustomFileTest = TLC_TRUE

%if EXISTS(ERTCustomFileTest) && ERTCustomFileTest == TLC_TRUE
    %assign ss = CompiledModel.System[GetBaseSystemIdx()]
    %assign CombineOutputUpdateFcns  = 1

    %openfile tmpBuf
    /************************************/
    /***    Custom code from TLC      ***/
    /************************************/
    %closefile tmpBuf
    %<LibSystemOutputCustomCode(ss,tmpBuf,"declaration")>
%endif

but this result an error shown below,

My question is,

Do you think I'm using the LibSystemOutputCustomCode() function correctly?

Is there another way I could approach this instead of using the LibSystemOutputCustomCode() function?

Answer 1

[Mark McBroom]

This block should allow you to insert code into the step() function: https://www.mathworks.com/help/ecoder/ref/systemupdate.html

[Sathishkumar Chakarapanai]

Hi,

Thanks for your suggestion !

but the system update block is not solving the problem. As mentioned before I am aiming to insert a piece of code at the begining "header" or "declaration" section in model_step function.

If i use system update block to solve this problem it has inserted the custom code to "trailer" section of model_step function.