Code Generation would clear my code in `main.c`!

[Fei]

Hi,

When I updating the pin assignment information and doing code generation, I find my code, for example, USER CODE part is clear. Why? Is any setup wrong here?

while (1)

{

/* USER CODE END WHILE */

/* USER CODE BEGIN 3 */

}

/* U

STM32CubeIDE

Version: 1.16.0

Build: 21983_20240628_1741 (UTC)

 MacOS: 14.2.1

[STTwo-32]

Hello @Fei and welcome to the ST Community .

Could you please attach you .ioc file and a screenshot of the issue if possible.

Best Regards.

STTwo-32 

[LCE]

My advice:

As soon as you start coding, create another CubeMX dummy project to copy new stuff from there.

Then you are safe from Cube overwriting stuff - and from unwanted HAL/LL library updates.

[Andrew Neil]

Please see the posting tips for how to properly post source code:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/ta-p/575228

Where are you putting your user code?

while (1)
{
/* USER CODE END WHILE */
                              /*
                              <<< Any code here is OUTSIDE the 'User' block,
                              <<< so WILL get overwritten by code generation
                              */
/* USER CODE BEGIN 3 */
}
/* U

[unsigned_char_array]

int main(void)
{
    /* USER CODE BEGIN WHILE */
    // user code
    /* USER CODE END WHILE */

    // NOT user code. Will be deleted!

    /* USER CODE BEGIN 3 */
    // more user code
    /* USER CODE END 3 */
}

[Andrew Neil]

@Fei  - Example of correct placement of user code (see the 2nd code block):

https://community.st.com/t5/stm32cubeide-mcus/how-to-covert-the-code-according-to-stm32cubeide/m-p/720546#M30694

[Andrew Neil]

@Fei if you prefer video, see this for correct placement of user code:

https://youtu.be/hyZS2p1tW-g?t=573