EDA技术与VHDL基础课后习题答案(供参考)

《EDA技术与VHDL基础》课后习题答案第一章EDA技术概述一、填空题1、电子设计自动化2、非常高速集成芯片硬件描述语言3、CAD、CAE、EDA4、原理图输入、状态图输入、文本输入5、VHDL、Verilog HDL6、硬件特性二、选择题1、A2、C3、A4、D5、C6、D7、A第二章可编程逻辑器件基础一、填空题1、PLD2、Altera公司、Xilinx公司、Lattice公司3、基于反熔丝编程的FPGA4、配置芯片二、选择题1、D2、C3、C4、D第三章VHDL程序初步——程序结构一、填空题1、结构、行为、功能、接口2、库和程序包、实体、结构体、配置3、实体名、类型表、端口表、实体说明部分4、结构体说明语句、功能语句5、端口的大小、实体中子元件的数目、实体的定时特性6、设计库7、元件、函数8、进程PROCESS、过程PROCEDURE9、顺序语句、并行语句二、选择题1、D2、C3、C4、B5、D6、B7、A8、C三、简答题2、LIBRARY IEEE;USE IEEE.STD_LOGIC_1164.ALL;ENTITY nand_3in ISPORT(a,b,c:IN STD_LOGIC;y:OUT STD_LOGIC);END;ARCHITECTURE bhv OF nand_3in ISBEGINy<=NOT(a AND b AND c);END bhv;5、00006、（247）第四章VHDL基础一、填空题1、顺序语句、并行语句2、跳出本次循环3、等待、信号发生变化时4、函数、过程5、值类属性、函数类属性、信号类属性、数据类型类属性、数据范围类属性6、程序调试、时序仿真7、子程序、子程序二、选择题1、B2、A3、A4、C5、B6、C7、D三、判断题1、√2、√3、√4、√5、×6、×四、简答题9、修改正确如下所示：LIBRARY IEEE;USE IEEE.STD_LOGIC_1164.ALL;USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY count ISPORT(clk:IN BIT;q:OUT BIT_VECTOR(7 DOWNTO 0)); END count;ARCHITECTURE a OF count ISBEGINPROCESS(clk)IF clk'EVENT AND clk='1' THENq<=q+1;END PROCESS;END a;10、修改正确如下所示：…SIGNAL invalue:IN INTEGER RANGE 0 TO 15; SIGNAL outvalue:OUT STD_LOGIC;…CASE invalue ISWHEN 0=>outvalue<='1';WHEN 1=>outvalue<='0';WHEN OTHERS=>NULL;END CASE;…11、修改正确如下所示：ARCHITECTURE bhv OF com1 ISBEGINSIGNAL a,b,c:STD_LOGIC;pro1:PROCESS（clk）BEGINIF NOT (clk'EVENT AND clk='1') THENx<=a XOR b OR c;END IF;END PROCESS;END;12、(1) PROCESS(…) --本题中两条IF语句均为信号c进行可能赋值，VHDL语言不允许IF a=b THENc<=d;END IF;IF a=4 THENc<=d+1;END IF;END PROCESS;(2)ARCHITECTURE behave OF mux IS --同时为q进行多次可能赋值，VHDL语言不允许BEGINq<=i0 WHEN a='0' AND b='0' ELSE '0'; --WHEN ELSE语句语法错误q<=i1 WHEN a='0' AND b='1' ELSE '0';q<=i2 WHEN a='1' AND b='0' ELSE '0';q<=i3 WHEN a='1' AND b='1' ELSE '0';END behave;13、next1<=1101 WHEN (a='0' AND b='0') ELSEd WHEN a='0' ELSEc WHEN b='1' ELSE1011;15、（1）、STD_LOGIC_UNSIGNED（2）、GENERIC（3）、IN（4）、width-1（7）（5）、counter_n（6）、“00000000”（7）、clk’EVENT AND clk=’1’（8）、ELSIF（9）、END IF（10）、q<= count16、修改正确如下所示：LIBRARY IEEE;USE IEEE.STD_LOGIC_1164.ALL;ENTITY CNT10 ISPORT ( clk: IN STD_LOGIC;q: OUT STD_LOGIC_VECTOR(3 DOWNTO 0));END CNT10;ARCHITECTURE bhv OF CNT10 ISSIGNAL q1 : STD_LOGIC_VECTOR(3 DOWNTO 0);BEGINPROCESS (clk)BEGINIF RISING_EDGE(clk) begin –begin修改为THENIF q1 < 9 THEN --q1为STD_LOGIC数据类型，而9为整型不可直接比较q1 <= q1 + 1; -- q1为STD_LOGIC数据类型，而1为整型不可直接相加ELSEq1 <= (OTHERS => '0');END IF;END IF;END PROCESS;q <= q1;END bhv;17、使用IF语句实现LIBRARY IEEE;USE IEEE.STD_LOGIC_1164.ALL;ENTITY mux21 ISPORT(ain,bin,sel:IN STD_LOGIC_VECTOR(1 DOWNTO 0);cout:OUT STD_LOGIC_VECTOR(1 DOWNTO 0));END;ARCHITECTURE bhv OF mux21 ISSIGNAL cout_tmp:STD_LOGIC_VECTOR(1 DOWNTO 0);BEGINPROCESS(ain,bin,sel)BEGINIF (sel="00") THEN cout_tmp<=ain OR bin;ELSIF (sel="01") THEN cout_tmp<=ain XOR bin;ELSIF (sel="10") THEN cout_tmp<=ain AND bin;ELSE cout_tmp<=ain NOR bin;END IF;END PROCESS;cout<=cout_tmp;END bhv;第五章QuartusⅡ集成开发软件初步一、填空题1、实体名2、FPGA、CPLD3、.vhd4、输入、综合、适配、仿真、下载5、RTL Viewer、Technology Map Viewer6、功能、参数含义、使用方法、硬件描述语言、模块参数设置7、mif、hex8、根目录二、选择题1、C2、D第七章有限状态机设计一、设计题1、LIBRARY IEEE;USE IEEE.STD_LOGIC_1164.ALL;ENTITY ztj ISPORT(clk,reset:IN STD_LOGIC;in_a:IN STD_LOGIC_VECTOR(1 DOWNTO 0);out_a:OUT STD_LOGIC_VECTOR(3 DOWNTO 0));END;ARCHITECTURE bhv OF ztj ISTYPE state IS(s0,s1,s2,s3); --用枚举类型定义状态，简单直观SIGNAL current_state,next_state:state; --定义存储现态和次态的信号BEGINp1:PROCESS(clk) --状态更新进程BEGINIF clk'EVENT AND clk='1' THENIF reset='1' THEN current_state<=s0;ELSE current_state<=next_state;END IF;END IF;END PROCESS;p2:PROCESS(current_state,in_a) --次态产生进程BEGINCASE current_state ISWHEN s0=>IF in_a/=”00” THEN next_state<=s1;ELSE next_state<=s0;END IF;WHEN s1=>IF in_a=/'”01” THEN next_state<=s2;ELSE next_state<=s1;END IF;WHEN s2=>IF in_a=”11” THEN next_state<=s0ELSE next_state<=s3;END IF;WHEN s3=>IF in_a/='11' THEN next_state<=s0;ELSE next_state<=s3;END IF;WHEN OTHERS=>NULL;END CASE;END PROCESS;p3:PROCESS(current_state)BEGINCASE current_state ISWHEN s0=>out_a<='”0101”;WHEN s1=>out_a<=”1000”;WHEN s2=>out_a<=”1100”;WHEN s3=>out_a<=”1101”;WHEN OTHERS=>NULL;END CASE;END PROCESS;END;2、LIBRARY IEEE;USE IEEE.STD_LOGIC_1164.ALL;ENTITY ztj ISPORT(clk,reset:IN STD_LOGIC;ina:IN STD_LOGIC_VECTOR(2 DOWNTO 0);outa:OUT STD_LOGIC_VECTOR(3 DOWNTO 0)); END;ARCHITECTURE bhv OF ztj ISTYPE state IS(s0,s1,s2,s3); --用枚举类型定义状态，简单直观SIGNAL current_state,next_state:state;BEGINp1:PROCESS(clk) --状态更新进程BEGINIF clk'EVENT AND clk='1' THENIF reset='1' THEN current_state<=s0;ELSE current_state<=next_state;END IF;END IF;END PROCESS;p2:PROCESS(current_state,ina)BEGINCASE current_state ISWHEN s0=> IF ina =”101” THEN outa<=”0010”;ELSIF ina=”111” THEN outa <=”1100”;END IF;IF ina =”000” THEN next_state<=s1;ELSE next_state<=s0;END IF;WHEN s1=> outa<=”1001”;IF ina =”110” THEN next_state<=s2;ELSE next_state<=s1;END IF;WHEN s2=> outa<=”1111”;IF ina =”011” THEN next_state<=s1;ELSIF ina =”100” THEN next_state<=s2;ELSE next_state<=s3;END IF;WHEN s3=> IF ina =”101” THEN outa<=”1101”;ELSIF ina=”011” THEN outa <=”1100”;END IF;IF ina =”010” THEN next_state<=s0;ELSE next_state<=s1;END IF;WHEN OTHERS=>NULL;END CASE;END PROCESS;END;3、LIBRARY IEEE;USE IEEE.STD_LOGIC_1164.ALL;ENTITY ztj ISPORT(clk,reset:IN STD_LOGIC;ina:IN STD_LOGIC_VECTOR(1 DOWNTO 0);outa:OUT STD_LOGIC_VECTOR(3 DOWNTO 0)); END;ARCHITECTURE bhv OF ztj ISTYPE state IS(s0,s1,s2,s3); --用枚举类型定义状态，简单直观SIGNAL state:istate;BEGINp1:PROCESS(clk)BEGINIF clk'EVENT AND clk='1' THENIF reset='1' THEN state<=s0;result<='0';ELSECASE state ISWHEN s0=>outa<=”0000”;IF ina=”00” THEN state<=s1;ELSE state<=s0;END IF;WHEN s1=> outa <=”0001”;IF ina=”01” THEN state<=s2;ELSE state<=s1;END IF;WHEN s2=> outa <=”1100”;IF ina=”11” THEN state<=s3;ELSE state<=s0;END IF;WHEN s3=> outa <=”1111”;IF ina=”00” THEN state<=s0;ELSE state<=s3;END IF;WHEN OTHERS=>NULL;END CASE;END IF;END IF;END PROCESS;END;第九章VHDL基本逻辑电路设计一、填空题1、输入信号、所处状态2、组合逻辑、时序逻辑3、触发器、14、D触发器、RS触发器、JK触发器、T触发器二、选择题1、A2、C。