display.vhd

来自「用max+plusII编写的vhdl程序 乒乓球游戏机」· VHDL 代码 · 共 30 行

LIBRARY	IEEE;
USE	IEEE.STD_LOGIC_1164.ALL;
USE	IEEE.STD_LOGIC_ARITH.ALL;
USE	IEEE.STD_LOGIC_UNSIGNED.ALL;

ENTITY display	IS
PORT( bcdin:IN STD_LOGIC_VECTOR(3 DOWNTO 0);
	displaycode:OUT STD_LOGIC_VECTOR(6 DOWNTO 0)
	);
END	 display;

ARCHITECTURE behave	OF display 	IS
BEGIN
WITH bcdin	SELECT
displaycode<="0111111"	WHEN	"0000",
			 "0000110"	WHEN	"0001",
			 "1011011"	WHEN	"0010",
			 "1001111"	WHEN	"0011",
			 "1100110"	WHEN	"0100",
			 "1101101"	WHEN	"0101",
			 "1111101"	WHEN	"0110",
			 "0100111"	WHEN	"0111",
		  	 "1111111"	WHEN	"1000",
		  	 "1101111"	WHEN	"1001",
		  	 "1001111"  	WHEN    OTHERS;
END	behave;