seg7_1.vhd

数码管扫描显示控制器,同时显示0、1、2、3、4、5这6个不同的数字图形到6个数码管上。复位时所有数码管全灭。

library ieee;
use ieee.std_logic_1164.all;
entity seg7_1 is
port(h:in std_logic_vector(3 downto 0);
     i:out std_logic_vector(6 downto 0);
     cat0:out std_logic_vector(5 downto 0)
    ); 
end seg7_1;
architecture seg7_1_arch of seg7_1 is
begin 
  process(h)
  begin
     case h is
     when"0000"=>i<="1111110";cat0<="011111";--0
     when"0001"=>i<="0110000";cat0<="101111";--1  
     when"0010"=>i<="1101101";cat0<="110111";--2
     when"0011"=>i<="1111001";cat0<="111011";--3
     when"0100"=>i<="0110011";cat0<="111101";--4
     when"0101"=>i<="1011011";cat0<="111110";--5
    when others=>i<="0000000";
    end case;
  end process;
end;