Hello,
I'm using a 80C51 with the MX - extension in my design. I want to build up a look up table (ROM) that contains the addresses of several functions. The address of each function must be split into high, middle and low - byte so that i can use it later as a "jump - table" in assembler.
For example: /* some functions. */ void fA(); void fB(); void fC();
/* Look up table: */ static code LUT [3][3] = {H(fA), M(fA), L(fA), {H(fB), M(fB), L(fC),...
I've already tried some macros which i found in other posts like:
#define L_B(v) (*(((unsigned char *) (&v) + 0)))
This macro doesn't work with function - addresses but works well on common pointers.
Best regards, Patrick