bin2seg.vhd

智能控制交通灯。分主路辅路

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;

entity bin2seg is
  port (  timebin_in : in std_logic_vector(4 downto 0);
          timeseg_l : out std_logic_vector(6 downto 0));
end bin2seg;

architecture bhv of bin2seg is
begin
  process(timebin_in)
  begin
    if timebin_in<="01001" then
      timeseg_l(3 downto 0)<=timebin_in;
      timeseg_l(6 downto 4)<="000";
    elsif timebin_in<="10011" then
      timeseg_l(3 downto 0)<=timebin_in - 10;
      timeseg_l(6 downto 4)<="001";
    else
      timeseg_l(3 downto 0)<=timebin_in - 20;
      timeseg_l(6 downto 4)<="010";
    end if;
  end process;
end bhv;