USBX user code sections are overwritten

[RAltm]

Hello,

I’m using CubeMX 6.18.0. I’m trying to implement a USBX standalone (bare-metal, no RTOS) CDC application. Code within user code sections is overwritten when re-generating the project. As far as I can see this is not a new problem, there are already some older topics about it. @ST: will this ever be fixed?

Regards

[Souhaib MAZHOUD]

Hello ​@RAltm 

Can you ensure that the option “Keep User Code when re-generating” is checked in Code Generator section:

Otherwise, could you please provide your IOC file in order to investigate the issue?

BR, Souhaib

[RAltm]

Hello  Souhaib,

the option to keep user code is enabled in my .ioc file. Currently I’m trying to setup a minimal working example. Unfortunately I’m not able to reproduce the issue, neither on the MWE nor on my project.

Since there’s no out-of-the-box working CDC non-RTOS example for my device (STM32U083) I’ve to implement it piece by piece based on snippets found on the web. So there’s a chance that I accidentally put a snippet before a USER CODE BEGIN statement and then regenerated the source code.

The only other thing which comes to my mind right now is that my changes to the .ioc file triggered a full replacement of the files.

I hope I can reproduce the issue, but I’ve to investigate first.

Regards

[RAltm]

Hello ​@Souhaib MAZHOUD 

I think I figured out what happened: as I mentioned there’s no out-of-the-box working CDC non-RTOS example for my device. I used source code snippets found on the web, including code for functions generated by CubeMX.

I replaced the whole functions instead of adding/modifying only the user code sections. The sources on the web have been created with older versions of CubeMX and/or the device Cube package and contained some faulty user code begin/end tags. So CubeMX wasn’t able to keep the sections because copying the whole functions also copied the faulty tags.

I deleted the generated source files, regenerated them and added code only in the user code sections. From what I can see until now it seems that no user code is removed unintentionally. I keep an eye on it, but currently it looks like it’s working as intended.

Regards