on the STM32CubeIDE, once I initailize the necessary devices on .ioc, does it required to generatate the code automatically. once I enable a device, it always generate the code. I have to restart the whole code again from scratch.

[cjaya.1]

Once I generate it. It deletes all the code work I have done.How can I disable that happening.

[Pavel A.]

First and foremost, use some method to save your work and recover when needed: git or other version control. Or just make a copy of everything.

Next, check the options in the "project manager" group. There is option to NOT delete all files before re-generation. Learn about the USER CODE guard blocks.

[cjaya.1]

Thank you for the reply. Does this "Code generation" is required in order to the device to work for example USART2 interrupts initialization and work with the interrupts receive.

[Pavel A.]

The code generation is not strictly required. For example, you can write it yourself :)