decl7s.vhd

实现LED灯的点亮

Library ieee;
Use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
  entity DECL7S is
    port(AB: in std_logic_vector(3 downto 0);
          LED7S: out std_logic_vector(6 downto 0) );
end;

architecture behav of DECL7S is
 
begin 
  process(AB)
    begin 
 case AB is
  when "1010"=>LED7S<="0001000";
  when "1011"=>LED7S<="0000011" ;
   when OTHERS=>NULL;
  end case;
  end process;  
  end behav;