Add source file

[Fannyrsy]

Hi everyone,

I'm trying to add a new file Alarm.c to my project. I added it in the Core>Src folder but I want to use it in a custom_app.c file that is located in another folder (STM32_WPAN>APP) as I use BLE. I included it to this file but when I compile, it doesn't find it in this file. How can I do to declare Alarm.c in one location and all my project's folder can find it?

Thank you

[AScha.3]

Hi,

> I added it in the Core>Src folder

How - just copy in ?

To let the IDE know, some (.c or .h) file now part of your project, you have to use : import.

So right click on the folder you want it to be, -> import -> from file sytem -> next ...

[Fannyrsy]

Thank you for your answer. I simply created a new .c file in the Core>Src folder. I am new to STM32CubeIDE and C programmation. I would like to create a .c file with different functions in it that are used in main.c and custom_app.c files. How can I do this ?

 

[AScha.3]

Almost same: right click on the folder you want it to be, -> new -> Source file

+ give name (no spaces, no special characters) , like : my_new.c  

Thats it.

[Andrew Neil]

---

@Fannyrsy wrote:

I would like to create a .c file with different functions in it that are used in main.c and custom_app.c files. How can I do this ?

---

@AScha.3 covered how to create the .c file.

You will also need to create a .h "header" file - use the same approach:

The header file contains extern declarations of the things you want to be shared with other source files.

To use it, those other source files will need to #include the header.

https://c-faq.com/decl/decldef.html 

To be sure that the compiler will be able to find the header, it must be in a folder that's included in the Include Paths.

The auto-generated ST code tends to have separate folders for source (Src) and header (Inc) files; eg,

This is a matter of style that you may or may not wish to follow...

[TDK]

> I would like to create a .c file with different functions in it that are used in main.c and custom_app.c files. How can I do this ?

If you want to use functions in other files, you need to declare them inside of a header file or before you  use them. Simply including the source file in your application isn't going to do this.

In your c file, define the functions:

void my_function_1() {
    ...
}

void my_function_2() {
    ...
}

In your h file, declare it:

void my_function_1();

void my_function_2();

In your other c files, include the header with the declarations.

#include "my_functions.h"