#define in project file ? ? ?

[Ken Johnson]

Needing to build 6 variants from the same code base, each using a different lookup table. Can I use a separate project file (hence a different name for the .hex file), with a #define somewhere in the project file which will let the compiler know which table to include? Is there a better way?

Still using V3.249

Thanks,
Ken

[Ttelmah]

Just have one version...
Have your main code, with a #define at the top, saying something like:

#define LOOKUP 1

Then have the the lookup tables in separate files, and have code like:

#if LOOKUP == 1
#include lookup1.h
#elif LOOKUP == 2
#include lookup2.h

etc..
#endif

This way you only have one set of code, and simply setting the lokup 'number', changes which table gets included.

Best Wishes

[Guest]

Ttelmah, thanks,

but I also want a unique name for the compiled (hex) file for each variant.

I don't want to change a source file, compile, rename the output, and repeat for each build. I lose track too easily.

Ideally, I'd have only one project file which built all the variants, but I've no idea how to do this. So, I'm thinking several (nearly identical) project files will do the trick, just building each one separately.

Suggestion?

[Ttelmah]

Do it backwards then.
Have six distinct 'programx.c' files. Each contains just:

#include maincode.c
#include tablex.c

Where 'x' is the corresponding table number, and 'maincode' is everything else (including a prototype for the table).

Then just make a seperate project file to point to each of these files. You will get the output files as 'programn' for each required version.

Best Wishes

[Guest]

Yes, this works - thanks very much.

Ken