stm32/matlab system object data conversion problem

Question

ali 2024-1-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2071506-stm32-matlab-system-object-data-conversion-problem

回答： ali 2024-2-14

I want to implement stm32 as USB_cdc using Simulink block and because Simulink stm32 doesn’t support usb so I have to create a block for this purpose. I used block driver method to do this. As you see below I created a system object and it is sending data correctly.

But when I want to use “oout” in Simulink, data is corrupted and meaningless.

Here is my procedure :

   function y = stepImpl(obj)   %#ok<MANU>
            y =uint64(0);
            
            if isempty(coder.target)
                % Place simulation output code here
            else
                % Call C-function implementing device output
                y = coder.ceval('data_change');
            end
   end
   

when data_cgange function called it dose:

1: send "oout" value to host with "CDC_Transmit_FS" function.(it is hardware layer function and work properly)

2: return "oout" value so i can use it in simulink.(it is not working)

"oout" value is filled in hardware layer and is declared "uint8_t oout[APP_RX_DATA_SIZE];" in code.

    long double data_change(void)
{
     CDC_Transmit_FS(oout, 5);
     memset (a,'\0',10);
     memcpy( a, oout, 10);
     fout = *a;
     //strtod(oout,endpoint);
    return fout;
}

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Answer 1

ali 2024-2-14

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2071506-stm32-matlab-system-object-data-conversion-problem#answer_1408618

在 MATLAB Online 中打开

By configuring this part, it worked properly

    function varargout = 
        getOutputSizeImpl(~)
              varargout{1} = [10];

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Answer 2

Goutham Varanasi 2024-1-30

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2071506-stm32-matlab-system-object-data-conversion-problem#answer_1399366

编辑：Goutham Varanasi 2024-1-30

This seems to be an issue with the code. Debug the generated code in cube IDE using the below mentioned process.

In Model, set Build configuration as Debug: Open Model settings from Modeling tab. Go to Code Generation -> Build process. Select Debug in Build configuration
Build the project from Simulink.
Create a new STM32 Project in STM32CubeIDE. Select the required board on which you are going to debug the Simulink-generated code.
Click on Debug -> Debug Configuration
Right Click on STM32 Cortex-M C/C++ Application -> New Configuration
Browse the STM32 project created in Step 3 as Project
Browse the elf generated from Simulink in C/C++ Application and Click Debug

Note:

• Close all open files before starting debug session.

• Debugging starts in ert_main.c file. Add breakpoints and use Step Into to go inside functions. It will open the relevant source files.

• To add a specify source file for debugging, go to File -> Open File… Browse the file and use it for debugging.