counter_100.vhd

使用Quartus II 5.0开发指导手册

-----------------------------------------
--    QUARTUS II TECHNICAL TRAINING    --
--       2-Digit Decimal 		       --
--            Modulus-100 Counter      --
-----------------------------------------

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;

entity COUNTER_100 IS
	port
	(
		CLK			: in std_logic;
--		CLR			: in std_logic;  --  Removed as is it unnecessary.  All registers p0wer
									 --    up low
		ONES_OUT	: out std_logic_vector (5 downto 0);
		TENS_OUT	: out std_logic_vector (5 downto 0);
		ROW_OUT		: out std_logic_vector (7 downto 0)
	);
end entity COUNTER_100;

architecture LOGIC of COUNTER_100 is

	signal CLR 		: std_logic;
	signal MEM_COUNT_OUT : std_logic_vector (2 downto 0);
	signal CNT_ONE_OUT : std_logic_vector (3 downto 0);
	signal CNT_TEN_OUT : std_logic_vector (3 downto 0);
	signal LED_IN_ONES : std_logic_vector (6 downto 0);
	signal LED_IN_TENS : std_logic_vector (6 downto 0);	
	signal Q_A_OUT     : std_logic_vector (7 downto 0);
	signal Q_B_OUT     : std_logic_vector (7 downto 0);	

	component MEM_COUNT is  -- Counter
		port
		(
			CLK                 : in    std_logic;
			RESET				: in	std_logic;
			CNT 				: out	std_logic_vector(2 downto 0)
		);
	end component MEM_COUNT;

--------  LED_STORAGE : ROM to store number patterns for LED display ---
--------
	component LED_STORAGE 
		PORT
		(
			clock		: IN STD_LOGIC ;
			aclr		: IN STD_LOGIC  := '0';
			address_a	: IN STD_LOGIC_VECTOR (6 DOWNTO 0);
			address_b	: IN STD_LOGIC_VECTOR (6 DOWNTO 0);
			q_a			: OUT STD_LOGIC_VECTOR (7 DOWNTO 0);
			q_b			: OUT STD_LOGIC_VECTOR (7 DOWNTO 0)
		);
	end component LED_STORAGE;

---------  COUNTER : Two digit decimal counter ------------------------
---------
	component COUNTER
	generic (
			PRESCALER : integer
			);
	port(
			CLOCK   : in std_logic;
			RESET   : in std_logic;
			CNT_ONE : out std_logic_vector(3 downto 0);
			CNT_TEN : out std_logic_vector(3 downto 0)	
	    );
	end component COUNTER;
	
---------  ROW_MEM : ROM which cycles rows for LED display
---------
	component row_mem
		PORT
		(
			address	: IN STD_LOGIC_VECTOR (2 DOWNTO 0);
			clock	: IN STD_LOGIC ;
			q		: OUT STD_LOGIC_VECTOR (7 DOWNTO 0)
		);
	end component;	
	
begin
	
	CLR <= '1';

	MEM_COUNT_INT : MEM_COUNT 
		port map (
			CLK 	=> CLK,
			RESET	=> CLR,
			CNT		=> MEM_COUNT_OUT
		);
	
	LED_STORAGE_INST : LED_STORAGE
		port map (
			clock	 => CLK,
			aclr	 => CLR,
			address_a	 => LED_IN_ONES,
			address_b	 => LED_IN_TENS,
			q_a	 => q_a_out,
			q_b	 => q_b_out
		);
		
	COUNTER_INST : COUNTER
		generic map (
			PRESCALER => 8388608 * 2
		)
		port map (
			CLOCK	=> CLK,
			RESET	=> CLR,
			CNT_ONE => CNT_ONE_OUT,
			CNT_TEN => CNT_TEN_OUT
		);
		
	row_mem_inst : row_mem 
		port map (
			address	 => MEM_COUNT_OUT,
			clock	 => CLK,
			q	 => ROW_OUT
		);
	
	LED_IN_ONES <= MEM_COUNT_OUT + (CNT_ONE_OUT & "000");
	LED_IN_TENS <= MEM_COUNT_OUT + (CNT_TEN_OUT & "000");
	
	ONES_OUT  <= Q_A_OUT(5 downto 0);
	TENS_OUT  <= Q_B_OUT(5 downto 0);

end architecture LOGIC;