Missing entries for UART DE pins for H7RS

[williams-one]

I think that the assignment for DriverEnable pins is missing for H7RS

The datasheet reports them as being shared with RTS pins

But there is no corresponding entry pin_trait_impl!(crate::usart::DePin, UARTXX, XXX, XXX); in the generated data

I think that the root cause of the problem is that there is no entry for _DE pins in the .xml descriptors such as stm32-data\sources\cubedb\mcu\STM32H7S7L8HxH.xml

If this is an actual problem I can help with the fix, but I need some guidance since I don't know exactly where to apply the fix. Here or in stm32-data and where to exactly put the override...

[Dirbaio]

ideally we should avoid adding overrides in embassy-stm32 for bad data, so fix should be in stm32-data.

If it really is the case that all RTSs are also DEs and all CTSs are NSSs then some well-placed if in stm32-data-gen should do the trick.

[williams-one]

OK. I have also double checked the xml data from STM sources https://github.com/STMicroelectronics/STM32_open_pin_data and it looks that they have fixed the peripheral description in CubeMx 6.13 release STMicroelectronics/STM32_open_pin_data@3e9ade9

I have seen that stm32-data is using sources from an older CubeMx release. I imagine that moving to a new one would mess up a lot of things in embassy since ST always keep changing things :(

But do you think that it could be possible to patch just the descriptor files for H7RS in stm32-data-sources? Or should I go on with the manual override?

[williams-one]

Oh and by the way... NSS pins are fine also in the old xml. Only DE pins are missing