2007-7-16
--_______________________________________________________________________
-- suocunqi4_k.vhd 用于键盘密码输入 ( _k: key)
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity suocunqi4_k is
port( key_in : in std_logic_vector(3 downto 0); ---shu ru
rst : in std_logic ; ---fu wei
cs : in std_logic ; ---pian xuan
oe : in std_logic ; ---shu chu yu xu
key_out : out std_logic_vector(3 downto 0) ); ---shu chu
end ;
architecture one of suocunqi4_k is
begin
--***
process(RST,CS,OE)
begin
if rst='1' then key_out <= "0000";
elsif cs='1' then
if oe='1' and oe'event then key_out <= key_in; end if;
end if;
end process;
end;
--***
--_______________________________________________________________________
--_______________________________________________________________________
-- suocunqi4_m.vhd 用于锁存预置密码( _m: memory)
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity suocunqi4_m is
port( key_in : in std_logic_vector(3 downto 0); ---shu ru
rst : in std_logic ; ---fu wei
cs : in std_logic ; ---pian xuan
oe : in std_logic ; ---shu chu yu xu
key_out : out std_logic_vector(3 downto 0) ); ---shu chu
end ;
architecture one of suocunqi4_m is
begin
--***
process(RST,CS,OE)
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