关于vhdl的消抖程序， library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_arith.all; use ieee.std_logic_unsigned.all; entity shift is port(sin,cp:in std_logic;f:out std_logic); end shift; architecture netlist1 of shift is component dff1 port(d,cp:in std_logic;q:out std_logic); end component; signa