并行乘法器南京理工大学紫金学院vhdl实验报告eda.doc

EDA技术与应用实验报告 实验名称：并行乘法器姓 名：学 号：班 级：通信时 间：2013南京理工大学紫金学院电光系一、 实验目的1、学习包集和元件例化语句的使用。2、学习FLU（全加器单元）电路的设计。3、学习并行乘法电路的设计。二、 实验原理并行乘法器的电路原理图如下图所示，主要由全加器和与门构成。并行乘法器原理图三、 实验内容1、 and_2library ieee;use ieee.std_logic_1164.all;entity and_2 isport (a,b:in std_logic; y:out std_logic);end and_2;architecture and_2 of and_2 isbeginy = a and b;end and_2;2、 faulibrary ieee;use ieee.std_logic_1164.all;entity fau isport (a,b,cin:in std_logic;s,cout:out std_logic);end fau;architecture fau of fau isbegins = a xor b xor cin;cout = (a and b)or(a and cin)or(b and cin);end fau;3、 top_rowlibrary ieee;use ieee.std_logic_1164.all;use work.my_components.all;entity top_row isport (a:in std_logic; b:in std_logic_vector(3 downto 0); sout,cout:out std_logic_vector(2 downto 0); p:out std_logic);end top_row;architecture structural of top_row isbeginU1: component and_2 port map(a,b(3),sout(2);U2: component and_2 port map(a,b(2),sout(1);U3: component and_2 port map(a,b(1),sout(0);U4: component and_2 port map(a,b(0),p);cout(2) = 0;cout(1) = 0;cout(0) = 0;end structural;4、 mid_rowlibrary ieee;use ieee.std_logic_1164.all;use work.my_components.all;entity mid_row isport (a:in std_logic; b:in std_logic_vector(3 downto 0); sin,cin:in std_logic_vector(2 downto 0); sout,cout:out std_logic_vector(2 downto 0); p:out std_logic);end mid_row;architecture structural of mid_row issignal and_out:std_logic_vector(2 downto 0);beginU1: component and_2 port map(a,b(3),sout(2);U2: component and_2 port map(a,b(2),and_out(2);U3: component and_2 port map(a,b(1),and_out(1);U4: component and_2 port map(a,b(0),and_out(0);U5: component fau port map(sin(2),cin(2),and_out(2), sout(1), cout(2);U6: component fau port map(sin(1),cin(1),and_out(1), sout(0), cout(1);U7: component fau port map(sin(0),cin(0),and_out(0), p, cout(0);end structural;5、 lower_rowlibrary ieee;use ieee.std_logic_1164.all;use work.my_components.all;entity lower_row isport (sin,cin:in std_logic_vector(2 downto 0); p:out std_logic_vector(3 downto 0);end lower_row;architecture structural of lower_row issignal local:std_logic_vector(2 downto 0);beginlocal(0) 1100_0111 then hun 0110_0011 then hun =0001; temp:=p-0110_0100;else hun 0101_1001 then ten 0100_1111 then ten 0100_0101 then ten 0011_1011 then ten 0011_0001 then ten 0010_0111 then ten 0001_1101 then ten 0001_0011 then ten 0000_1001 then ten =0001; temp:=temp-0000_1010;