How to show " A to F " ???
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity mini is
port ( en, m_reset, UP_DW, clk : in std_logic;
q : out std_logic_vector (3 downto 0));
end mini;
architecture flow of mini is
signal count_sig :unsigned (3 downto 0);
begin
process ( en, m_reset, UP_DW, clk )
begin
if (en = '1' and m_reset = '1')
then
count_sig <= "0000";
elsif(en = '0' and m_reset = '1')
then
count_sig <="0000";
elsif falling_edge (clk) and UP_DW = '0'
then
count_sig <= count_sig +1;
elsif falling_edge (clk) and UP_DW = '1'
then
count_sig <= count_sig -1;
end if;
end process;
q <= std_logic_vector (count_sig);
end flow;
