how to create global const in program

[butterfly]

normaly to create global const ;

const int16 MASK = 0x0000;

i want to read eeprom adm create global const like that
main(){
const int16 MASK = read_EEPROM (0x00);

}

and give this error:

*** Error 51 "C:\umut\um\alt1.c" Line 68(1,6): A numeric expression must appear here

how to make it happen?

[Ttelmah]

What you describe, is impossible.
Simply declare a normal global variable, and read the EEPROM data into it. A_constant_ is 'read only', so, you cannot write data into it.
You can declare a variable that lives in EEPROM, using the typemod directive.
Your expression fails for two reasons. The first is the inability to write to a constant, while the second is that 'read_eeprom', is a function, only returning a value when it is run, while the constant declaration, occurs at compile time, so no value is available.

Best Wishes

[butterfly]

thanks

how can i create a global various then

[Ttelmah]

Any variable declared outside the subroutines, is 'global'. Declare a variable at the head of the program, and it is available to all the routines.