- I get a warning : only initialized variables can be placed into program memory area (Of course, the table is initialized!)
I think the warning is bogus. If I enable warnings for code that uses program memory I get it too.
Look in pgmspace.h for macros for accessing program memory. Although I don't think, as a general rule, that using assembler gains you anything. The code generated from C is usually just as good.
Well, when read_far should be used?
It looks like, if you have more than 64 Kb of flash.