about specifying the range of a counter

Altera_Forum · ‎08-06-2010

Hi,

Actually this is a question about VHDL.

I need a counter which is loaded with two different initial values T1 or T2 in different cases and then counts down to 0.

How do I specify the range of the counter in declaration?

constant T1 : integer := AA;

constant T2 : integer := BB;

signal cnt : integer range 0 to ??; (here I need an expression to find the larger number of AA and BB)

Is it possible to do it in VHDL?

Altera_Forum · ‎08-06-2010

function find_larger(a, b : integer) return integer is begin if a >= b then return a else return b; end if; end function find_larger; .... signal cnt : integer range 0 to find_larger(T1, T2);

Altera_Forum · ‎08-06-2010

The IEEE library has a MAX function for the same purpose.