How to make block description of a simulink function block displayed above function header?

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Xiaojie Qiu 2018-10-24

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https://ww2.mathworks.cn/matlabcentral/answers/425777-how-to-make-block-description-of-a-simulink-function-block-displayed-above-function-header

评论： Xiaojie Qiu 2018-10-29

Hi everyone,

I'm using simulink function block to generate C code. For simulink function block, I add a brief function description to the block as shown below on the left side.

After code generation, the function description is inserted inside the function body.

So, I want to know if there is a way to display this description above the function header instead of inside the function body?

Thanks!

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Answer 1

zhichuan wang 2018-10-24

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I think I get you point. You can modify the CODE TEMPLATES FILE in Configuration Parameters(Code Generation->Templates-Code templates-Source file template) to do what you want.

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Xiaojie Qiu 2018-10-24

编辑：Xiaojie Qiu 2018-10-24

在 MATLAB Online 中打开

Hi Zhichuan,

Thanks for your reply!

I tried to customize the code generation template file by modifying the section Function Banner as shown below.

%%Custom function banner section (optional)

Customize function banners by using the following predefined tokens:

%%%<ModelName>, %<FunctionName>, %<FunctionDescription>, %<Arguments>, 
%%%<ReturnType>, %<GeneratedFor>, %<BlockDescription>.
<FunctionBanner style="doxygen_qt">
Function Name                 : %<FunctionName>
Block Description             : %<BlockDescription>
Arguments                     : %<Arguments>
Return Type of Function       : %<ReturnType>
</FunctionBanner>

But the block description is still displayed inside the function body in the generated code:

/*!
 * Function Name                 : test_timestwo
 * Block Description             :
 * Arguments                     : uint32_T rtu_u)
 * Return Type of Function       : uint32_T
 */
uint32_T test_timestwo(uint32_T rtu_u)
{
  /*
   * Block description for '<Root>/timestwo':
   *  This function multiplies the input with two and then outputs the result as return value.
   *
   *  Input:
   *  u: uint32
   *
   *  Return:
   *  y: uint32
   */
  return rtu_u << 1;
}

Could you please give me more details about how to solve this problem?

zhichuan wang 2018-10-25

编辑：zhichuan wang 2018-10-25

在 MATLAB Online 中打开

Possible reason is that Custom function banner section is valid for generated functions. Thus, you should set the funciton, uint32_T test_timestwo(uint32_T rtu_u)", as an atomic unit and specify the function name as you want.
Please attach you model and related files. I need to know more details about your models.
The system target file ert.tlc is mostly used in my job. Custom function banner section in ert_code_template.cgt is as following:

%%Custom function banner section (optional)

Customize function banners by using the following predefined tokens:

%%%<ModelName>, %<FunctionName>, %<FunctionDescription>, %<Arguments>, 
%%%<ReturnType>, %<GeneratedFor>, %<BlockDescription>.
<FunctionBanner style="classic">
%<FunctionDescription>
%<BlockDescription>
</FunctionBanner>

Generated code is as following:

      /*
 * Output and update for atomic system: '<Root>/Subsystem'
 * Block description for: '<Root>/Subsystem'
 *   Subsystem Description: This is block description
 */
real32_T test_Subsystem(real32_T rtu_aa)
{
  /* Gain: '<S1>/Gain' */
  return StructPointer->a * rtu_aa;
}

zhichuan wang 2018-10-26

在 MATLAB Online 中打开

Hi, qxj

I've saved your model with previous version in 2017b with the help of others. After running your model in 2017b , I found that the generated code is different from yours in 2018a, which makes me confused.

/*
 * File: test_2017b_timestwo.c
 *
 * Code generated for Simulink model 'test_2017b'.
 *
 * Model version                  : 1.23
 * Simulink Coder version         : 8.13 (R2017b) 24-Jul-2017
 * C/C++ source code generated on : Fri Oct 26 08:51:02 2018
 *
 * Target selection: ert.tlc
 * Embedded hardware selection: Intel->x86-64 (Windows64)
 * Code generation objectives: Unspecified
 * Validation result: Not run
 *
 *
 * TLC version                    : 8.13 (Jul 25 2017)
 */

#include "test_2017b_timestwo.h"

/* Include model header file for global data */
#include "test_2017b.h"
#include "test_2017b_private.h"

/*!
 * Function Name                 : test_2017b_timestwo
 * Block Description             : Block description for: '<Root>/timestwo'
 *   This function multiplies the input with two and then outputs the result as return value.
 *
 *   Input:
 *   u: uint32
 *
 *   Return:
 *   y: uint32
 * Arguments                     : uint32_T rtu_u
 * Return Type of Function       : uint32_T
 */
uint32_T test_2017b_timestwo(uint32_T rtu_u)
{
  return rtu_u << 1;
}

/*
 * File trailer for generated code.
 *
 * [EOF]
 */
48

Xiaojie Qiu 2018-10-29

Hi Zhichuan,

after code generation by using MATLAB R2017b, I also got the same result as you.

So, I have to draw a conclusion, that this problem is a side effect due to MATLAB version.

If you have any idea in the future, please tell me how to solve it. Thanks for your help again!

qxj

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How to make block description of a simulink function block displayed above function header?

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