architecture one of cnt12 is signal cnt std _ logic_vector(2 downto O); signalclk_tmp: std_logic constant m: Integer:=5;-控制计数器的常量m=n/2-1 gin p b if clk event and clk=·1′then if cnt=m then clk notc cnt<=“000 else nt+1: end if: end if: d process div 12<=clk_tmarchitecture one of cnt12 is signal cnt: std_logic_vector(2 downto 0); signal clk_tmp: std_logic; constant m:integer:=5; --控制计数器的常量m=n/2-1 begin process (clk) begin if clk’event and clk=‘1’ then if cnt=m then clk_tmp<= not clk_tmp; cnt<=“000”; else cnt<=cnt+1; end if; end if; end process; div12<=clk_tmp; end one;