[ECOS] where to put platform specific code

[Heiko Panther <heiko dot panther at web dot de>]

I've implemented a variant and a platform HAL. Now I want to add two more features which don't seem to be covered by the standard eCos file structure.

I have the diagnostic serial interface in the variant HAL, but for compatibility with the common HAL everything's still named hal_diag.*

First, I want a LED funtion. I'm thinking about declaring the interface in the variant's hal_diag.h, and implementing it in platform_misc.c. Good?

Second, I have some platform-specific functions (shift register with output pins). Would you make a driver package for that, or can they go somewhere into the platform HAL? In the latter case, which header and source file names should I use?

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