循环冗余校验CRC模块设计EDA实验报告.doc

EDA技术实验报告实验名称：循环冗余校验（CRC）模块设计姓名：xxx班级：xxxx学号：xxxxx实验日期：指导教师：一、 实验设计要求编译示例文件，给出仿真波形。建立一个新的设计，调入crcm模块。把其中的CRC校验生成模块和CRC校验查错模块连接在一起，协调工作。引出必要的信号，锁定引脚，并在EDA实验系统上实现。二、设计原理电路结构图或原理图：Crcm：Crcma：电路功能描述：把crcm模块的datacrco和datacrci连接起来，hrecv和hsend连接起来，输入有效数据后CRC校验生成模块对数据进行特殊运算，产生5位校验码，并和原数据并接成17位传输数据，CRC校验查错模块取出传输数据后12位并对它进行同样的特殊运算，得到5位校验码，于传输数据钱5位比较，如果一样那么传输无误，不一样说明数据在传输途中错误了。三、实验程序程序一：library ieee;use ieee.std_logic_1164.all;use ieee.std_logic_unsigned.all;use ieee.std_logic_arith.all;entity crcm isport(clk,hrecv,datald,rst:in std_logic; sdata:in std_logic_vector(11 downto 0); datacrco:out std_logic_vector(16 downto 0); datacrci:in std_logic_vector(16 downto 0); rdata:out std_logic_vector(11 downto 0); datafini:out std_logic; error0,hsend:out std_logic);end crcm;architecture comm of crcm is constant multi_coef: std_logic_vector(5 downto 0) :=110101; signal cnt,rcnt:std_logic_vector(4 downto 0); signal dtemp,sdatam,rdtemp:std_logic_vector(11 downto 0); signal rdatacrc:std_logic_vector(16 downto 0); signal st,rt:std_logic;beginprocess(rst,clk) variable crcvar :std_logic_vector(5 downto 0);beginif rst =1 then st =0 ; elsif(clkevent and clk =1)then if(st = 0 and datald =1) then dtemp = sdata;sdatam = sdata;cnt 0); hsend=0; st=1; elsif(st =1 and cnt 7) then cnt = cnt + 1; if(dtemp(11)=1) then crcvar :=dtemp(11 downto 6)xor multi_coef; dtemp = crcvar(4 downto 0) & dtemp(5 downto 0) & 0; else dtemp = dtemp(10 downto 0) & 0;end if; elsif(st=1 and cnt=7)then datacrco=sdatam & dtemp(11 downto 7); hsend =1;cnt =cnt + 1; elsif(st=1 and cnt =8) then hsend = 0;st = 0; end if; end if;end process;process(rst,hrecv,clk) variable rcrcvar : std_logic_vector(5 downto 0);beginif rst =1 then rt =0; elsif(clkevent and clk =1)then if(rt = 0 and hrecv =1)then rdtemp =datacrci(16 downto 5); rdatacrc =datacrci;rcnt 0);error0= 0;rt=1; elsif(rt = 1 and rcnt7)then datafini=0;rcnt=rcnt+1; if(rdtemp(11) = 1)then rcrcvar := rdtemp(11 downto 6)xor multi_coef; rdtemp= rcrcvar(4 downto 0) & rdtemp(5 downto 0) & 0; else rdtemp= rdtemp(10 downto 0)&0;end if; elsif(rt=1 and rcnt=7)then datafini=1; rdata=rdatacrc(16 downto 5); rt=0; if(rdatacrc(4 downto 0)/=rdtemp(11 downto 7)then error0rst,clk=clk,sdata=sdata,datald=datald,datacrco=datacrcp,hrecv=hsenp,hsend=hsenp,datacrci=datacrcp,rdata=rdata,error0=error0,datafini=datafini);end architecture comm;四、编译及仿真结果选用器件型号、编译后使用器件资源情况、引脚配置情况（硬件实验）：时序分析结果（最大延时路径、最大时钟频率等等）：程序仿真波形图（结合文字分析仿真结果）：五、总结程序有点长，输入过程中注意漏字，漏符号。六、思考题library ieee;use ieee.std_logic_1164.all;use ieee.std_logic_unsigned.all;use ieee.std_logic_arith.all;entity crcm isport(clk,hrecv,datald,rst:in std_logic; sdata:in std_logic_vector(11 downto 0); datacrco:out std_logic_vector(16 downto 0); datacrci:in std_logic_vector(16 downto 0); rdata:out std_logic_vector(11 downto 0); datafini:out std_logic; error0,hsend:out std_logic);end crcm;architecture comm of crcm is constant multi_coef: std_logic_vector(5 downto 0) :=110101; signal cnt,rcnt:std_logic_vector(4 downto 0); signal dtemp,sdatam,rdtemp:std_logic_vector(11 downto 0); signal rdatacrc:std_logic_vector(16 downto 0); signal st,rt:std_logic;beginprocess(rst,clk) variable crcvar :std_logic_vector(5 downto 0);beginif rst =1 then st =0 ; elsif(clkevent and clk =1)then if(st = 0 and datald =1) then dtemp = sdata;sdatam = sdata;cnt 0); hsend=0; st=1; elsif(st =1 and cnt 7) then cnt = cnt + 1; if(dtemp(11)=1) then crcvar :=dtemp(11 downto 6)xor multi_coef; dtemp = crcvar(4 downto 0) & dtemp(5 downto 0) & 0; else dtemp = dtemp(10 downto 0) & 0;end if; elsif(st=1 and cnt=7)then datacrco=sdatam & dtemp(11 downto 7); hsend =1;cnt =cnt + 1; elsif(st=1 and cnt =8) then hsend = 0;st = 0; end if; end if;end process;process(rst,hrecv,clk) variable rcrcvar : std_logic_vector(5 downto 0);beginif rst =1 then rt =0; elsif(clkevent and clk =1)then if(rt = 0 and hrecv =1)then rdtemp =datacrci(16 downto 5); rdatacrc =datacrci;rcnt 0);error0= 0;rt=1; elsif(rt = 1 and rcnt7)then datafini=0;rcnt=rcnt+1; if(rdtemp(11) = 1)then rcrcvar := rdtemp(11 downto 6)xor multi_coef; rdtemp= rcrcvar(4 downto 0) & rdtemp(5 downto 0) & 0; els