bbb.vhd

来自「运用vhdl语言编程,是数字逻辑中的电子钟!各模块及源代码都有,适合电信同学使用」· VHDL 代码 · 共 22 行

library ieee;
use ieee.std_logic_1164.all;
entity bbb is
port(sec1,sec0,min1,min0,h1,h0:in std_logic_vector(3 downto 0);
sel:in std_logic_vector(2 downto 0);
q:out std_logic_vector(3 downto 0));
end bbb;
architecture bbb_arc of bbb is
begin
process(sel)
begin
case sel is
when"101"=>q<=sec0;
when"100"=>q<=sec1;
when"011"=>q<=min0;
when"010"=>q<=min1;
when"001"=>q<=h0;
when"000"=>q<=h1;
when others =>null;
end case;
end process;
end bbb_arc;