EDA上机报告(白云方).doc

实验报告 课程名称：可编程器件技术原理与开发应用 院 （系）： 信息与控制工程学院 专业班级： 电子1201班 姓 名： 白云方 学 号： 120640125 指导教师： 魏蕊 2015 年 1 月 7日  编码器 程序 LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; ENTITY pri_coder8_3 IS PORT( I : IN STD_LOGIC_VECTOR(7 DOWNTO 0); EI : IN STD_LOGIC; A : OUT STD_LOGIC_VECTOR(2 DOWNTO 0); GS,EO : OUT STD_LOGIC); END pri_coder8_3; ARCHITECTURE behave OF pri_coder8_3 IS BEGIN A(2)=EI OR (I(4) AND I(5) AND I(6) AND I(7)); A(1)=EI OR (I(2) AND I(3) AND I(6) AND I(7)) OR ((NOT I(5)) AND I(6) AND I(7))OR ((NOT I(4)) AND I(6) AND I(7)); A(0)=EI OR ((NOT I(2)) AND I(3) AND I(5) AND I(7)) OR (I(1) AND I(3) AND I(5) AND I(7)) OR ((NOT I(4)) AND I(5) AND I(7)) OR ((NOT I(6)) AND I(7)); GS=EI OR (I(0) AND I(1) AND I(2) AND I(3) AND I(4) AND I(5) AND I(6) AND I(7)); EO=EI OR (NOT (I(0) AND I(1) AND I(2) AND I(3) AND I(4) AND I(5) AND I(6) AND I(7))); END behave; 仿真图 译码器 程序 LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; ENTITY decoder3_8 IS PORT( I : OUT STD_LOGIC_VECTOR(7 DOWNTO 0); A : IN STD_LOGIC_VECTOR(2 DOWNTO 0); G1 : IN STD_LOGIC; GA : IN STD_LOGIC; GB : IN STD_LOGIC); END decoder3_8; ARCHITECTURE dataflow OF decoder3_8 IS BEGIN PROCESS(G1,GA,GB,A) BEGIN IF(G1=0 OR GA=1 OR GB=1)THEN I ELSIF(G1=1 AND GA=0 AND GB=0)THEN CASE A IS WHEN 000=I WHEN 001=I WHEN 010=I WHEN 011=I WHEN 100=I WHEN 101=I WHEN 110=I WHEN OTHERS=I END CASE; END IF; END PROCESS; END dataflow; 仿真图 3.数值比较器 程序 LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; ENTITY cmp_4 IS PORT( A,B : IN STD_LOGIC_VECTOR(3 DOWNTO 0); YA,YB,YC: OUT STD_LOGIC); END cmp_4; ARCHITECTURE behave OF cmp_4 IS BEGIN PROCESS(A,B) BEGIN IF(AB)THEN YA=1;YB=0;YC=0; ELSIF(AB)THEN YA=0;YB=1;YC=0; ELSE YA=0;YB=0;YC=1; END IF; END PROCESS; END behave; 仿真图 4.多路选择