Error when calling C code and libraries from MATLAB

Kevin Ankarsköld

2019 6 13

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Hi,

I am trying to call external .c files, which outputs real time data from an INS system, to Matlab and get these real-time values into a simple matlab GUI I have built. I am not an expert in C but I have a good understanding about matlab.

I dont know if this is the right approach for what I want to do, so if there is a simpler way I am open for suggestions.

I am following the steps provided by https://se.mathworks.com/help/matlab/call-c-library-functions.html , but when I am trying to load just the first header file into matlab it does not find the file and I get an error.

This is the first lines of the C code that I want to load

#include <sbgEComLib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

Below is the code I use

loadlibrary('sbgECom','sbgEComLib.h')

where sbgECom is refered to my sbgECom.lib file, and the error I get is

Error using loadlibrary
There was an error loading the library "sbgECom"
The specified module could not be found.
Error in ellipsecall (line 11)
loadlibrary('sbgECom','sbgECom.h')
Caused by:
    Error using loaddefinedlibrary
    The specified module could not be found.

I am in the directory of the files, so the .lib and .h files are in the current directory. What am I doing wrong?

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Jason Firth 2019-6-13

I think the loadlibrary function only works with dynamic libraries (.dll for windows). For static libraries, you would have to either compile the library into a dynamic library and export the functions you would like to use, or use the mexFunction interface to write a mex function to call the function you need.

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