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Zephyr project on STM32

   Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
  • Install host dependencies.
  • Import toolchain and SDK.
  • Create, configure, build and manage apps.
  • Debug STM32.
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You are viewing a reply to Adding a custom Library to SW4STM32 project  

Adding a custom Library to SW4STM32 project

Posted by sylvainpetre on 2018-08-28 09:46

Hello Bernard,

Sorry for the answer delay ...

Yes, the BlueMox_Library.h is posted in both main.c and BlueMox_Library.c.

Here’s the declaration of my two variables :

volatile float Iload = 0.0;
char buffer 30 = {0};

EDIT : If I use static for the declaration the compilation works, but I don’t really understand why a static declaration is so important in this case.

Best regards
Sylvain.

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Posted by dautrevaux on 2018-08-28 15:14 France

Hi Sylvain,

That exactly what I thought: in BlueMox_Library.h you should declare these variables; however here you define them. Instead, in BlueMox_Library.h you should have the variables declarations:
extern volatile float Iload; 
extern char buffer 30;
and in BlueMox_Library.c you must add the definitions (that were incorrectly placed in the header file):
volatile float Iload = 0.0; 
char buffer 30 = {0};

Then your project should compile and link without any problem.

Remember: you should only declare things in header file, never define them (except for static inline functions).

Hope this clarifies things,

Bernard (Ac6)

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