BSP common low level interfaces

[manuargue]

Hello, I’ve been exploring the project and looking into the NXP S32K1 port (specifically this BSP implementation). From what I can see, it seems like each platform’s BSP defines its own set of low-level driver APIs for peripherals.

I’m wondering if there’s any plan to define a set of generic BSP low level interfaces for common peripheral drivers, with the goal of improving application portability across platforms. Essentially, something like consolidating the APIs into a common libs/bsp structure that could be implemented per platform.

Is my understanding correct that the current approach is platform-specific per BSP, or is there an intention to evolve toward a more unified interface in the future?

Thanks

[hbragge-acn]

Excellent question, we don't seem to have good examples in the codebase yet. Most modules under platforms/*/bsp/ seem to either implement C functions or they exist for one platform only.

We should certainly try to use common interfaces in BSP modules though, some examples will be added soon. We're currently working on adding IEepromDriver implementations for both platforms, for instance. Meanwhile, please take a look at the AbstractCANTransceiver implementations (CanFlex2Transceiver for S32, SocketCanTransceiver for POSIX). They aren't implementing a BSP interface literally (the interface isn't located under libs/bsw/bsp/), but the basic idea is the same.

[mthiede-acn2]

Hello @manuargue, the BSP interface is intended as a generic low-level API. Right now, we only have a single HW platform in the repository, that's why we can't see similarities. The "posix" platform is a little different. Above the BSP layers we have further abstractions (like the one for CAN which Henri mentioned above) to keep our stack modular.

As a side note: We are very much interested in adding support for more NXP targets, like the S32K3. We are working on that, but would also highly appreciate support from NXP side.

[manuargue]

Thanks @hbragge-acn and @mthiede-acn2 for the detailed responses!

That makes sense. I’ll keep an eye out for those examples as they’re added.