jieguo.vhd

停车场显示是日常生活中使用很平常的系统

--显示输出，包括停车位个数和点阵信息
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;

entity jieguo is
	port(
		clk  : in std_logic;
		cheweikong: in std_logic;

              ledms0 : in std_logic_vector(7 downto 0);
	      ledmr0 : in std_logic_vector(7 downto 0);
              ledmg0 : in std_logic_vector(7 downto 0); 
           shumaguan0 : in std_logic_vector(6 downto 0);

              ledms1 : in std_logic_vector(7 downto 0);
              ledmr1 : in std_logic_vector(7 downto 0);
	    shumaguan1 : in std_logic_vector(6 downto 0);

	      ledms  : out std_logic_vector(7 downto 0); 
	      ledmr  : out std_logic_vector(7 downto 0);
	      ledmg  : out std_logic_vector(7 downto 0); 
	   shumaguan : out std_logic_vector(6 downto 0)
		);
end jieguo;

architecture jieguo of jieguo is
begin
	process(clk)
	begin
		if(cheweikong='1')then
			ledms<=ledms0;
			ledmr<=ledmr0;
			ledmg<=ledmg0;
		shumaguan<=shumaguan0;
		else
			ledms<=ledms1;
			ledmr<=ledmr1;
			ledmg<="00000000";
		shumaguan<=shumaguan1;
		end if;
	end process;
end jieguo;