Platform independent C code

Hello All,

We are developing 186 based embedded C code for small memory model. And in future we are planning on using same C code for ARM processor under no OS.

At this moment, we are putting processor related macros in seperate .h file. Apart from this, what care should I take while developing the code?


Lastly, we are declaring a array of staructure as __far const. With this keyword compiler allocates memory in code memory and not is data segment. I am not sure, whether it is the way for Paradigm compiler. My question is, what does _far const mean for other compiler or is it ANSI standard?

Please let me know.

Thanks,

It is not standard. It allows sixteen bit pointers to reference objects offset by more than 32K bytes of memory.

>Apart from this, what care should I take while developing the code?

Try to minimize the usage of target-specific stuff, or add comments to draw your attention. Basically, all of the portability issues.

>My question is, what does _far const mean for other compiler or is it ANSI standard?

Well _far is not standard, and it may be a syntax error for another compiler. I'd recommend using a macro wrapper, using an architecture predefined macro.