The error is telling you that you have multiple definitions of Gestion_INPUT:
- in the file ./Application ino/Src/ino_1_IO.c from the header C:/Users/innolife/STM32CubeIDE/workspace_1.9.0/PE30-V_V2.41-K_V2.2/Drivers/AX/Inc/AX_IO.h at line 21;
- in the file ./Application ino/Src/ino_0_Application.c from the header C:/Users/innolife/STM32CubeIDE/workspace_1.9.0/PE30-V_V2.41-K_V2.2/Drivers/AX/Inc/AX_IO.h at line 21
So it looks like you are defining the variable in you header - don't do that!
Your header should just contain the extern declaration - the definition should be in a .c file.
EDITs:
https://community.st.com/t5/stm32cubeide-mcus/build-issue-as-variable-defined-once-more-however-it-is-only/m-p/657254/highlight/true#M25815
And here's a full example:
https://community.st.com/t5/stm32cubeide-mcus/adding-new-c-source-files-to-my-project-and-navigating-through/m-p/657455/highlight/true#M25847
Further edit:
@st_user wrote:
The error is on declarations of a typedef or enum on a header files.
No. The error is on the definition of the variable - Gestion_INPUT - not the definition of the typedef.
This is the typedef definition:
typedef struct
{
uint8_t OldState_1;
uint8_t Flag_IN_1;
uint8_t Flag_OUT_1;
uint8_t TIMER_1;
uint8_t OldState_2;
uint8_t TIMER_2;
uint8_t OldState_3;
uint8_t TIMER_3;
uint8_t OldState_4;
uint8_t Flag_IN_4;
uint8_t Flag_OUT_4;
uint8_t TIMER_4;
} GESTION_IO;
That should stay in the header.
This is the definition of the variable (actually, two variables) of that type:
GESTION_IO Gestion_INPUT, Gestion_OUTPUT;
That should not be in the header.
The header should have just the extern declaration:
extern GESTION_IO Gestion_INPUT, Gestion_OUTPUT;
The definition should be in one - and only one - .c file.
For how to properly post source code (as above) see:
https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/ta-p/575228
