test47.vhd

大家一定要看 哦 程序在与多看多练 我找了好久才找到呢

library ieee;
use ieee.std_logic_1164.all;
entity test47 is 
port(en :in bit;
     num:in bit_vector(3 downto 0);
     q: out bit_vector(0 to 6)
);
end;
architecture behav of test47 is
begin 
process(en,num)
begin
if en='0' then
case num is
when "0000"=>q<="1111110"; 
when "0001"=>q<="0110000";
when "0010"=>q<="1101101";
when "0011"=>q<="1111001";
when "0100"=>q<="0110011";
when "0101"=>q<="1011011";
when "0110"=>q<="1011111";
when "0111"=>q<="1110000";
when "1000"=>q<="1111111";
when "1001"=>q<="1111011";
when others=>null;
end case;
end if;
end process;
end behav;