状态机“毛刺”的产生及消除方法
when st4 => if (eoc =’0’)then next_state=st4;else next_state =st5; end if;
when st5 => next_state =st6;
when st6 => next_state =st0;
when others=> next_state =st0;
end case;
out4=current_state(5 downto 2);
ale=current_state(5); start =current_state(4);
oe=current_state(3); lock1=current_state(2);
end process;
process(clk)
begin
if (clk’event and clk =‘1’) then
current_state =next_state;
end if ;
end process ;
process (lock1)
if lock1=‘1’ and lock1’event then
regl=d ;
end if ;
end process ;
q=regl;
……
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