gewei.vhd

停车场显示是日常生活中使用很平常的系统

--数码管显示提车位个数个位 
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
use ieee.std_logic_arith.all;

entity gewei is
	port(
		clk  : in std_logic;
		chewei : in std_logic_vector(6 downto 0);
	 
		ledge: out std_logic_vector(6 downto 0)
		);
end gewei;

architecture gewei of gewei is

begin

	process(clk)
	variable carnm : integer range 0 to 64;
	variable g: integer range 0 to 9;
	begin
			carnm:=conv_integer(chewei);       
			g:=carnm rem 10;                  --算出个位数字
			  
			case g is                        --七段译码 
				when 0=>ledge<="1111110";
				when 1=>ledge<="0110000";
				when 2=>ledge<="1101101";
				when 3=>ledge<="1111001";
				when 4=>ledge<="0110011";
				when 5=>ledge<="1011011";
				when 6=>ledge<="1011111";
				when 7=>ledge<="1110000";
				when 8=>ledge<="1111111";
				when 9=>ledge<="1111011";
				when others=>ledge<="0000000";
			end case;
	end process;
end gewei;