状态控制电路的VHDL实现如下： LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; USE IEEE.STD_LOGIC_ARITH.ALL; ENTITY controllor IS PORT( RESET:IN STD_LOGIC; --复位信号 KEY: IN STD_LOGIC_VECTOR(3 DOWNTO 0); --输入时间 SET_T:IN STD_LOGIC; --时间设置信
十进制计数器 library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity count10 is port(clr,start,clk: in bit; cout: out bit; library ieee; daout: out std_logic_vector(3 downto 0)); end count10; architecture a of count10 is signal
