TMS320F28379D: Creating a CCS Project with multiple .c files

Vishal Kakade

Part Number: TMS320F28379D

Hello experts,

I have created a project with multiple c files. I kept all the global variable declarations in a single file but definitions in respective .c files. I see that the variables are not initializing to the value assigned during definition.

If I create the respective .h file for each .c file and include the header file in the required .c files, I am getting multiple declaration errors.

I want to know, How to create a project which has many .c and their respective .h files and every .c file has global variables and how to access those variables in other .c files?

Regards

Vishal

over 4 years ago

0 Santosh Jha over 4 years ago

TI__Guru 50611 points

Hi Vishal,

Did you try to declare with using 'extern' in .h file, and definition in one .c file. In other .c file, just include the header file.

0 Vishal Kakade over 4 years ago in reply to Santosh Jha

Expert 1625 points

Hi Santhosh,

I tried making it extern, Still, the variables are not initializing.

0 Santosh Jha over 4 years ago in reply to Vishal Kakade

TI__Guru 50611 points

Vishal,

Are you using COFF or EABI format?

I will recommend to go through the compiler user's guide, section 4.3.5 Specifying the Type of Global Variable Initialization

https://www.ti.com/lit/ug/spru514w/spru514w.pdf

0 Vishal Kakade over 4 years ago in reply to Santosh Jha

Expert 1625 points

What is COFF or EABI?

0 Vishal Kakade over 4 years ago in reply to Vishal Kakade

Expert 1625 points

What is COFF or EABI?,

I read the document. I am unable to understand it. Can you clarify?

0 Santosh Jha over 4 years ago in reply to Vishal Kakade

TI__Guru 50611 points

These are two different output format. You can check your project setting.

In EABI format, the global variables are auto initialized to zero, where as in COFF format it is not initialized by default.

I will reiterate again to go through the documentation link I sent earlier.

0 Vishal Kakade over 4 years ago in reply to Santosh Jha

Expert 1625 points

Hi Santhosh,

I understood COFF vs EABI. where to configure these?

Regards

0 Santosh Jha over 4 years ago in reply to Vishal Kakade

TI__Guru 50611 points

Vishal,

The output format can be changed in the project setting. Right-click on project, select 'Show Build Setting ...". Output format is on main page itself.