implement the C program to the Simulink model

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Besme James
Besme James 2022 年 3 月 31 日
編集済み: Rishav 2023 年 10 月 4 日
I need to implement the below C program to the my Simulink model.
values :
A_row and R is some variables.
How can I Implement it in Simulink using c caller or with s function ? How can I input A values?I tried Using c caller and also with s function. But as I have a 2d matrix inside my struct, it is unable to implement so.
Can somebody help me?
Thanks in advance.
************************************My program starts here *********************************************************************
Header file as follows
struct ss_matrix // Initialize Structure for Inputs and outputs of StateSpace Equation
int A_row;
float **A;
float R;
Src file as follows;
struct ss_matrix ss_dyn_mem(struct ss_matrix dyn_mem_var)
dyn_mem_var.A =(float**) malloc(dyn_mem_var.A_row*sizeof(float*));
for (i = 0; i < dyn_mem_var.A_row; i++)
dyn_mem_var.A[i] =(float*) malloc(dyn_mem_var.A_row*sizeof(float));
struct ss_matrix ss_library(struct ss_matrix library_var)
library_var.A_row =library_var.R *library_var.A_row;
****++++++++++++++My program end here************************************************

回答 (1 件)

Rishav 2023 年 10 月 4 日
編集済み: Rishav 2023 年 10 月 4 日
Hi Besme,
I understand that you are trying to implement a C program by using s-function in Simulink.
Here are the steps for the same:
1. Create a New Simulink model.
2. In your Simulink model, add an S-Function block. You can find this block under the "User-Defined Functions" section in the Simulink library browser.
3. Configure the S-Function Block:
  • Double-click the S-Function block to open its properties.
  • In the "S-Function Name" field, provide a unique name for your S-Function. This name will be used for the generated C code.
  • In the "Parameters" tab, specify any input parameters you want to pass to the S-Function, such as A_row and R.
#include "simstruc.h"
struct ss_matrix {
int A_row;
float **A;
float R;
void ss_dyn_mem(struct ss_matrix *dyn_mem_var) {
dyn_mem_var->A = (float**)malloc(dyn_mem_var->A_row * sizeof(float*));
for (int i = 0; i < dyn_mem_var->A_row; i++) {
dyn_mem_var->A[i] = (float*)malloc(dyn_mem_var->A_row * sizeof(float));
void ss_library(struct ss_matrix *library_var) {
library_var->A_row = library_var->R * library_var->A_row;
5. After writing the C code, save the S-Function and compile it by clicking the "Build" button in the S-Function block dialog.
6. Connect the input and output signals to the S-Function block as needed for your model.
7. Now, you can simulate your Simulink model with the custom S-Function block. Make sure to provide appropriate input values for A_row and R in your Simulink model.
Thank you,
Rishav Saha

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