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-- EE552 Automatic Volume Control
-- Display controller
-- Created Mar 10, 2000 by Travis Robinson
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-- used to test the display
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library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all; 
use ieee.std_logic_unsigned.all; 

package avc_pack is

	component max_min 
	port(
		rst, clk, max_sel, min_sel, incr, decr: in std_logic;
		max_vol, min_vol: buffer std_logic_vector(7 downto 0);
		count_out: out std_logic_vector(13 downto 0)
		);
	end component;

	component amp_calc
	port(
		clk: in std_logic;
		noise_in: in std_logic_vector(7 downto 0);
		maxvol, minvol: in std_logic_vector(7 downto 0);
		ampcalc_out: out std_logic_vector(7 downto 0);
		count_out: out std_logic_vector(13 downto 0)
	);
	end component;

end package;

library ieee; 
use ieee.std_logic_1164.all; 
use ieee.std_logic_arith.all; 
use ieee.std_logic_unsigned.all; 
library work;
use work.avc_pack.all;

entity display_controller is
	port(reset,clock: in std_logic;
		max_sel,min_sel,incr,decr:in std_logic;
		max_vol,min_vol:buffer std_logic_vector(7 downto 0);
		display_out: out std_logic_vector(13 downto 0);
		amp_out:buffer std_logic_vector( 7 downto 0)
		);
end entity;

architecture disp of display_controller is

signal max_min_display,amp_display: std_logic_vector(13 downto 0);
signal out_noise: std_logic_vector(7 downto 0);

begin

process (reset)
begin
	if reset='0' then
		out_noise<="00000000";
	else out_noise <=out_noise;
	end if;
end process;

maxmin1: max_min port map(
		rst=> reset,
		clk=> clock,
		max_sel=>max_sel,
		min_sel=>min_sel,
		incr=> incr,
		decr=>decr,
		max_vol=> max_vol,
		min_vol=> min_vol,
		count_out=> max_min_display
		);

ampcalc1: amp_calc port map(
		clk=> clock,
		noise_in=> out_noise,
		maxvol=> max_vol,
		minvol=> min_vol,
		ampcalc_out=> amp_out,
		count_out=> amp_display
		); 

process(clock)
begin
if rising_edge(clock) then
	if max_sel ='0' or min_sel = '0' then
		display_out<= max_min_display;
	else display_out<= amp_display;
	end if;
end if;

end process;

end architecture;