How do I save MATLAB data for a C/C++ based embedded system?

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Yang Renda 2024-2-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2078611-how-do-i-save-matlab-data-for-a-c-c-based-embedded-system

评论： Yang Renda 2024-2-7

Say that I have used MATLAB coder to create multiple C codes that I shall apply on an STM32.

The C codes take a lot of parameters as input, and I do not want to write data as header files, nor do I want to write a program to do that, not if there are existing solutions, or better alternatives.

The application does not call for the need of a single board computer, and STM32 cannot store nor read .mat files (I think).

What are my options?

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Answer 1

Sumit Ghosh 2024-2-7

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https://ww2.mathworks.cn/matlabcentral/answers/2078611-how-do-i-save-matlab-data-for-a-c-c-based-embedded-system#answer_1404406

You can achieve this using coder.read and coder.write.

https://www.mathworks.com/help/coder/ref/coder.read.html

https://www.mathworks.com/help/coder/ref/coder.write.html

In short, coder.write(fileName,data) stores the argument data in a file with the name fileName.coderdata in your current directory. You can use this function in your host machine to sae the paraleters in a file.

dataFromFile = coder.read(fileName) reads from the fileName.coderdata storage file and returns the data stored within the file. You can use this function in your MATLAB® code for which you want to generate C/C++ code. The generated code performs the data read at run time.

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Yang Renda 2024-2-7

The thing is, this still creates a separate data file that the host program has to read.

But I am unsure if this data can be compiled to the embedded system, embedded systems are not computers, I cannot just copy the data in, it has to be compiled in.

I will test this and see if it works.

In principle, if the data is just expressed in the form of an array in a c source file as a const, I know that will be compiled inside. So something like this will surely work.

Yang Renda 2024-2-7

coder.read reads data at run time, which also needs a directory, which means it is meant for some some form of operating system, but an embedded system does not have that. I am highly uncertain whether this can work.

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