在Linux内核和用户空间/ MCU之间共享代码

Question

I have a Linux driver for an external MCU application. The driver and the MCU communicate over a bus using our own protocol.

I would like to share the program code for the protocol features between the kernel module and the MCU but since it's not possible to build a lib for the kernel my only idea so far is to write the code "as kernel as possible" and then just copy the entire .c file between the platforms.

Are there any other ways? Surly I can't be the first to want to do this.

I'm talking about code reuse, not IPC mechanisms.

Thanks!

Answer 1

It requires some hardware abstraction so the code implementing the protocol needs to be generic as possible not requiring any hardware specific details. The file implementing the protocol could have functions like init, exit, read, write and interrupt. The hardware implementation itself (gpio, memory, bus) can be accessed through function pointers which are registered at time when calling the init function. The directory structure can be set up like @smbear suggested