STM32F1 hal lacks some interfaces

[Szewcson]

Is your feature request related to a problem? Please describe.
STM32F1x hal lacks fsmc, i2s, sdio and probably other interfaces.

Describe the solution you'd like
Add dtsi definitions like in higher families

Additional context
I want to port Zephyr to stm32primer 2 board, I'm currently working on board folder, and thinking about adding drivers, but I think hal is not my cup of tea.

[erwango]

Hi @Szewcso, thanks for your interest. We don't have plans or bandwidth to do these developments atm, but we'll surely help to review attempts to make it happen if you'd like to contribute.

[benjaminbjornsson]

Hi @Szewcson,

Maybe I can help. Not sure exactly what you're asking for though, can you elaborate?

[Szewcson]

I want to use fsmc, sdio and i2s on stm32f103vet6. I saw that that family don't have that peripherals defined in hal headers. Also I wonder if driver for fmc handles fsmc.

[Szewcson]

Which file I should edit to add all the defines? Are there other changes needed to backport those peripherals to lower family?

[benjaminbjornsson]

I had a look at the I2S and the SPI/I2S registers look almost identical between F1 and F4, so hopefully the driver works with at most minor changes. Also, the I2S pinctrl definitions are missing, and those will have to be generated in the hal_stm32 repository.

[benjaminbjornsson]

Hi @Szewcson,

I made a draft PR #81181 which currently tries to add I2S support. Unfortunately I don't have F1 hardware, but maybe you can help me with testing?