回复 沙发 mr.king 的帖子
喔,我自己写了一个
代码:----------------------------------------------------------------------------------
-- Company:
-- Engineer:
--
-- Create Date: 14:22:13 05/20/2012
-- Design Name:
-- Module Name: some - Behavioral
-- Project Name:
-- Target Devices:
-- Tool versions:
-- Description:
--
-- Dependencies:
--
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
--
----------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--use IEEE.NUMERIC_STD.ALL;
-- Uncomment the following library declaration if instantiating
-- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;
entity some is
Port ( A : in STD_LOGIC;
CLK : in STD_LOGIC;
C : out STD_LOGIC;
Z : out STD_LOGIC);
end some;
architecture Behavioral of some is
signal s1:std_logic;
signal s2:std_logic;
signal s_z:std_logic;
signal s_c:std_logic;
begin
process(clk)is
begin
if(clk'event and clk='1')then
s1<=a;
end if;
end process;
s2<=s1 and a;
process
begin
wait until clk'event and clk='1';
s_c<=s2;
end process;
process
begin
wait until clk'event and clk='1';
s_z<=s1;
end process;
z<=s_z;
c<=s_c;
end Behavioral;
实现了该电路图,但是我觉得太低效了。。自动转换会更高效吗?怎样自动转换,还望详细介绍。。