decoder7.vhd

可以显示六个BCD码的动态扫描七段数码管显示电路。有缓存

--bcd_7seg.vhd bcd to 7 segment encoder
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity decoder7 is
 Port ( 
           bcd: in  STD_LOGIC_VECTOR(3 downto 0);  --input bcd
           dout : out  STD_LOGIC_VECTOR(6 downto 0));  --output to 7 segment
           
end decoder7;
architecture Behavioral of decoder7 is
 
begin
with bcd select
dout<="0111111" when "0000", --0
        "0000110" when "0001", --1
        "1011011" when "0010", --2
        "1001111" when "0011", --3
        "1100110" when "0100", --4
        "1101101" when "0101", --5
        "1111101" when "0110", --6
        "0100111" when "0111", --7
        "1111111" when "1000", --8
        "1101111" when "1001", --9
        "1000000" when "1110", --minus
        "0000000" when others;

end Behavioral;