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library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity arr09 is
port (val : std_logic_vector(3 downto 0);
res : out character);
end arr09;
architecture behav of arr09 is
type map_type is array (natural range 0 to 15) of character;
constant cmap : map_type := "0123456789abcdef";
function convert (v : natural range 0 to 15) return character
is
variable r : character;
begin
r := cmap (v);
return r;
end convert;
begin
res <= convert (3);
end behav;
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