Hi Luca,

I don't know, if this was the correct way, but it works with the Keil.

E.g.:

File "dig_io.c51:

sbit IALIM = dig_in[0]^0;


File "dig_io.h":

extern const bit IALIM;
And "dig_io.h" was included only into the other objects, which need access to this variable.

Peter