lcd计数显示程序

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

---- Uncomment the following library declaration if instantiating
---- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;

entity counter is
    Port ( clk : in std_logic;
     resetn : in std_logic;
           dout : out std_logic_vector(7 downto 0);
           lcd_en : out std_logic;
           lcd_rs : out std_logic;
           lcd_rw   : out std_logic);
end counter;

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