xianshi.vhd

altera 中基于NIOS软核系统的16点阵汉字显示程序

-- WARNING: Do NOT edit the input and output ports in this file in a text
-- editor if you plan to continue editing the block that represents it in
-- the Block Editor! File corruption is VERY likely to occur.

-- Copyright (C) 1991-2005 Altera Corporation
-- Your use of Altera Corporation's design tools, logic functions 
-- and other software and tools, and its AMPP partner logic       
-- functions, and any output files any of the foregoing           
-- (including device programming or simulation files), and any    
-- associated documentation or information are expressly subject  
-- to the terms and conditions of the Altera Program License      
-- Subscription Agreement, Altera MegaCore Function License       
-- Agreement, or other applicable license agreement, including,   
-- without limitation, that your use is for the sole purpose of   
-- programming logic devices manufactured by Altera and sold by   
-- Altera or its authorized distributors.  Please refer to the    
-- applicable agreement for further details.


-- Generated by Quartus II Version 5.0 (Build Build 148 04/26/2005)
-- Created on Fri Sep 21 09:57:52 2007

LIBRARY ieee;
USE ieee.std_logic_1164.all;


--  Entity Declaration

ENTITY XIANSHI IS
	-- {{ALTERA_IO_BEGIN}} DO NOT REMOVE THIS LINE!
	PORT
	(
		SHI : IN STD_LOGIC_VECTOR(1 downto 0);
		WEI : IN STD_LOGIC_VECTOR(3 downto 0);
		Q : OUT STD_LOGIC_VECTOR(15 downto 0)
	);
	-- {{ALTERA_IO_END}} DO NOT REMOVE THIS LINE!
	
END XIANSHI;


--  Architecture Body

ARCHITECTURE XIANSHI_architecture OF XIANSHI IS	
BEGIN
process(shi,wei)
variable b:std_logic_vector(15 downto 0);
begin
case shi is


when "00"=>
case wei is
when "0000"=>b:="0110000000000000";
when "0001"=>b:="0111100000000000";
when "0010"=>b:="0001111000000000";
when "0011"=>b:="0000011110000000";
when "0100"=>b:="0000000111100000";
when "0101"=>b:="0000000001111000";
when "0110"=>b:="0000000000011110";
when "0111"=>b:="0000000000000111";
when "1000"=>b:="0000000000000111";
when "1001"=>b:="0000000000011110";
when "1010"=>b:="0000000001111000";
when "1011"=>b:="0000000111100000";
when "1100"=>b:="0000011110000000";
when "1101"=>b:="0001111000000000";
when "1110"=>b:="0111100000000000";
when "1111"=>b:="0110000000000000";
when others=>null;
end case;


when "01"=>
case wei is
when "0000"=>b:="0000000000000000";
when "0001"=>b:="0000000000000000";
when "0010"=>b:="1111111111111111";
when "0011"=>b:="1111111111111111";
when "0100"=>b:="0000000110000000";
when "0101"=>b:="0000000110000000";
when "0110"=>b:="0000000110000000";
when "0111"=>b:="0000000110000000";
when "1000"=>b:="0000000110000000";
when "1001"=>b:="0000000110000000";
when "1010"=>b:="0000000110000000";
when "1011"=>b:="0000000110000000";
when "1100"=>b:="1111111111111111";
when "1101"=>b:="1111111111111111";
when "1110"=>b:="0000000000000000";
when "1111"=>b:="0000000000000000";
when others=>null;
end case;


when "10"=>
case wei is
when "0000"=>b:="0000000000000000";
when "0001"=>b:="0000000000000000";
when "0010"=>b:="1111111111111111";
when "0011"=>b:="1111111111111111";
when "0100"=>b:="1100000000000011";
when "0101"=>b:="1100000000000011";
when "0110"=>b:="1100000000000011";
when "0111"=>b:="0110000000000110";
when "1000"=>b:="0110000000000110";
when "1001"=>b:="0110000000000110";
when "1010"=>b:="0011000000001100";
when "1011"=>b:="0001100000011000";
when "1100"=>b:="0000111111110000";
when "1101"=>b:="0000011111100000";
when "1110"=>b:="0000000000000000";
when "1111"=>b:="0000000000000000";
when others=>null;
end case;


when "11"=>
case wei is
when "0000"=>b:="0000000000000000";
when "0001"=>b:="0000000000000000";
when "0010"=>b:="0000000000000000";
when "0011"=>b:="1111111111111111";
when "0100"=>b:="1111111111111111";
when "0101"=>b:="0000000000000011";
when "0110"=>b:="0000000000000011";
when "0111"=>b:="0000000000000011";
when "1000"=>b:="0000000000000011";
when "1001"=>b:="0000000000000011";
when "1010"=>b:="0000000000000011";
when "1011"=>b:="0001100000000111";
when "1100"=>b:="0001100000000111";
when "1101"=>b:="0000000000000000";
when "1110"=>b:="0000000000000000";
when "1111"=>b:="0000000000000000";
when others=>null;
end case;


when others=>null;
end case;
q<=b;
end process;
END XIANSHI_architecture;