Matlab/simulink coder interface

Hello¸ I have created a model in Simulink and want to integrate the Matlab /Simulink generated C code with a C application and want to know if it is possible to provide inputs and access the output of the C generated code from Matlab /Simulink, also is there anyway to read /write data to database from C generated Matlab /Simulink code.

Answer 1

[Jaimin]

Hi @Ruhi Phulbandhe

Once you have generated the code using Simulink coder/Embedded coder in C, you can make use of the “model_initialize”, “model_step”, and “model_terminate” functions associated with your model. Before doing so, ensure that you include the relevant header files of the model in your application’s C code.

You can directly access the input and output variable after adding header files.

Please refer pseudo code for better understanding, (Update application code according to it)

#include "model.h"  // Include generated header

int main() {
    model_initialize();  // Initialize model

    while (running) {
        // Set inputs
        model_U.input1 = getInputFromDatabase();

        model_step();  // Execute model step

        // Get outputs
        double output = model_Y.output1;
        writeOutputToDatabase(output);
    }

    model_terminate();  // Terminate model
    return 0;
}

For accessing a database in “C”, please refer to the relevant database documentation for connection details.

I have attached sample code for connecting to a MySQL database to provide a clearer understanding.

#include <mysql/mysql.h>

void connectToDatabase() {
    MYSQL *conn;
    conn = mysql_init(NULL);
    mysql_real_connect(conn, "host", "user", "password", "database", 0, NULL, 0);
    // Perform queries and handle data
    mysql_close(conn);
}

For more information on Embedded Coder refer following MathWorks Documentation

https://www.mathworks.com/help/ecoder/product-fundamentals.html

For more information on Simulink Coder refer following MathWorks Documentation

https://www.mathworks.com/help/rtw/

I hope this will be helpful.