MATLAB: Can the functions mdlstart and mdlterminate not be edited inside the S-function Builder in Simulink

buildermdlstartmdlterminates-functionsimulink

In the S-function Builder I can choose to generate a function 'mdlstart' and a function 'mdlterminate' under 'Build Info -> Additional methods'. These functions need to be edited in the generated code.

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This functionality is available in MATLAB R2017b.

For releases prior to MATLAB R2017b, the ability to edit the 'mdlstart' and 'mdlterminate' functions inside the S-function Builder is not available in Simulink.

To work around this issue, press the 'Build' button and edit the functions in the generated source file.

Please note that any modifications you make to the source code will be overwritten when the S-Function is built again. You may want to save your mdlstart and mdlterminate code in a text file so that you can paste it back into the source files when the S-function is re-built.

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MATLAB: How to customize the “main” function generated by Real-Time Workshop Embedded Coder 5.2 (R2008b)

Among other ways, Real-Time Workshop Embedded Coder 5.2 (R2008b) provides two types of customization files to change the appearance of the generated code:

1. Code Generation Template or CGT files which control the overall structure of the generated code. These customizations are applied to most of the code and data files generated by Real-Time Workshop Embedded Coder. These template files are specified in the “Code Template” and “Data Template” panels under 'Configuration Parameters -> Real-Time Workshop -> Templates'.

2. Custom File Processing or CFP Templates which control the control the content of individual files in the generated code. This file is specified in the “Custom Template” panel of 'Configuration Parameters -> Real-Time Workshop -> Templates'.

In order to customize the auto-generated "main" function, a custom CFP Template file needs to be specified.

Refer to the steps below in order to customize the "main" function:

1. For any model, by default, "example_file_process.tlc" CFP Template file is specified to generate the "main" function. However, in this file, line 23 declaring the flag "ERTCustomFileTest" is commented out. Hence the contents of this file are not being used. Uncommenting this line will cause Real-Time Workshop Embedded Coder to use the contents of this CFP template file.

2. Lines 104-112 of this file call the template for a "main" function stored in the files "bareboard_srmain.tlc" OR "bareboard_mrmain.tlc". The structure of the main program depends on the content of these TLC files.

Now if you try to generate code for a model by using this file (after uncommenting line 23), the following lines of code will be executed and the warning message will no longer appear in the generated "main" function since it is not defined in the TLC files that are being called in the code below.

%%Create a simple main. Files are located in $MATLABROOT/rtw/c/tlc/mw.
    %if LibIsSingleRateModel() || LibIsSingleTasking()
      %include "bareboard_srmain.tlc"
      %<FcnSingleTaskingMain()>
    %else
      %include "bareboard_mrmain.tlc"
      %<FcnMultiTaskingMain()>
    %endif

In fact, these are the only lines of TLC code required in a custom "File customization template" file to create a custom "main" function and for picking up the template for the "main" function from "bareboard_srmain.tlc" or "bareboard_mrmain.tlc" file. Hence, the rest of the lines in the TLC file can be deleted while testing.

To create a custom look for the "main" function, modify the contents of the following files to suit the requirements:

a. $MATLABROOT\rtw\c\tlc\mw\bareboard_mrmain.tlc

b. $MATLABROOT\rtw\c\tlc\mw\bareboard_srmain.tlc

c. $MATLABROOT\toolbox\rtw\targets\ecoder\example_file_process.tlc

For details on how to use these advanced customization techniques please refer to the link below:

https://www.mathworks.com/help/releases/R2008b/toolbox/ecoder/index.html?/help/releases/R2008b/toolbox/ecoder/ug/f22219.html

In MATLAB 8.0 (R2012b) from MATLAB commad line:

>> web([docroot '/ecoder/ug/configure-templates-for-customizing-code-organization-and-format.html'])

MATLAB: Is it possible to include “defines” in the rtwmakecfg.m file in Real-Time Workshop 7.1 (R2008a)

It is not possible to specify "defines" in the rtwmakecfg.m file.

To work around the issue, add defines to buildInfo in the PostCodeGenCommand as shown below:

set_param(model,'PostCodeGenCommand','addDefines(buildInfo,{''-DLEGACY_CODE_NOT_UNICODE_COMPLIANT'' ''-DMY_DEFINE=1''},''OPTS'');')

The defines must be put in the group 'OPTS', which is the last argument to addDefines.

For more information on using the PostCodeGenCommand, refer to the documentation titled "Programming a Post Code Generation Command" in the Help Documentation (for R2008a) linked below:

web([docroot,'/toolbox/rtw/ug/bqobjt8.html#bqobjzq'])

This section describes how to use the PostCodeGenCommand, as well as points to the list of functions available for manipulating buildInfo, which is the source of information put into the generated makefile.

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Related Solutions

MATLAB: How to customize the “main” function generated by Real-Time Workshop Embedded Coder 5.2 (R2008b)

MATLAB: Is it possible to include “defines” in the rtwmakecfg.m file in Real-Time Workshop 7.1 (R2008a)

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