{"id":327,"date":"2006-05-19T13:38:11","date_gmt":"2006-05-19T13:38:11","guid":{"rendered":"http:\/\/fanhaijun.com\/?p=327"},"modified":"2026-04-07T14:04:17","modified_gmt":"2026-04-07T06:04:17","slug":"%e3%80%8a%e7%a1%ac%e4%bb%b6%e8%ae%be%e8%ae%a1%e4%b8%8e%e8%b0%83%e8%af%95%e3%80%8b%e5%ae%9e%e9%aa%8c","status":"publish","type":"post","link":"https:\/\/fanhaijun.com\/?p=327","title":{"rendered":"\u300a\u786c\u4ef6\u8bbe\u8ba1\u4e0e\u8c03\u8bd5\u300b\u5b9e\u9a8c"},"content":{"rendered":"

\u5b9e\u9a8c\u6307\u5bfc\u4e66<\/a><\/p>\n

===========================
\u9a8c\u4e00\u30013-8\u8bd1\u7801\u5668\u7684\u8bbe\u8ba1<\/p>\n

library ieee; 
use ieee.std_logic_1164.all 
entity decoder38 is 
port(a: in std_logic_vector(2 down to 0)
en: in std_logic 
y: out std_logic_vector(7 down to 0);
end decoder38; 
architecture a of decoder38 is
signal sel: std_logic_vector(3 down to 0);
begin 
sel(0)<=en;
sel(1)<=a(0);
sel(2)<=a(1); 
sel(3)<=a(2); 
with sel select 
y<="00000001"when"0001", 
y<="00000010"when"0011", 
y<="00000100"when"0101", 
y<="00001000"when"0111", 
y<="00010000"when"1001", 
y<="00100000"when"1011", 
y<="01000000"when"1101", 
y<="10000000"when"1111", 
y<="11111111"when others; 
end a;
===============================================
\u7efc\u5408\u5b9e\u9a8c
\u9a8c\u4e00\u30013-8\u8bd1\u7801\u5668\u7684\u8bbe\u8ba1
1\u3001\u4e86\u89e3MAX+
2\u3001\u590d\u4e60VHDL\u8bed\u8a00\u7684\u57fa\u7840\u77e5 
\u4e8c
1\u3001\u638c\u63e1\u7ec4\u5408\u903b
2\u3001\u638c\u63e1\u7ec4\u5408\u903b\u8f91\u7535\u8def\u7684\u9759\u6001\u6d4b\u8bd5\u65b9\u6cd5
3\u3001\u521d\u6b65\u638c\u63e1MAX+plus\u2161\u8f6f\u4ef6\u7684\u57fa\u672c\u64cd\u4f5c
4\u3001\u521d\u6b65\u4e86\u89e3\u53ef\u7f16\u7a0b\u5668\u4ef6\u7684\u8bbe\u8ba1\u5168\u8fc7\u7a0b\u3002 
\u4e09
\u8bd1\u7801\u5668\u662f\u5c06
\u4e00\u4e2a4\u4f4d\u7684BCD\u7801\u8f6c\u6362\u62107\u4e2a\u7801\u8f93\u51fa\uff0c\u4ee5\u4fbf\u57287\u6bb5\u663e\u793a\u5668\u4e0a\u663e\u793a\u8fd9\u4e2a\u5341\u8fdb\u5236\u6570\u3002\u8bd1\u7801
\u5668\u6709N\u4e2a\u4e8c\u8fdb\u5236\u9009\u62e9\u7ebf\uff0c\u90a3\u4e48\u6700\u591a\u53ef\u8bd1\u7801\u8f6c\u6362\u62102N\u4e2a\u6570\u636e\u3002\u5f53\u4e00\u4e2a\u8bd1\u7801\u5668\u6709N\u6761\u8f93\u5165\u7ebf\u548cM
\u6761\u8f93\u51fa\u7ebf\u65f6\uff0c\u5219\u79f0\u4e3aN\u00d7M\u7684\u8bd1\u7801\u5668\u3002\u672c\u5b9e\u9a8c\u8981\u6c42\u5b9e\u73b03\u00d78\u8bd1\u7801\u5668\u3002 
\u5206\u522b\u4f7f\u7528\u56fe
\u4eff\u771f\u9a8c\u8bc1\u81ea\u5df1\u8bbe\u8ba1\u7684\u7535\u8def\uff0c\u6700\u540e\u505a\u51fa\u5b9e\u9a8c\u62a5\u544a\u3002 
1\u3001\u8bbe\u8ba1\u8f93\u5165 
\uff081\uff09\u56fe\u5f62\u7f16\u8f91 
\u6253\u5f00MAX+plus 
\u5bf9
\uff082\uff09\u6587\u672c\u7f16\u8f91 <\/p>\n

\u6253\u5f00MAX+p
\uff0c\u4fdd\u5b58\u6587\u4ef6\uff0c\u6269\u5c55\u540d\u4e3a.vhd\u3002 
\u53c2\u8003\u7a0b\u5e8f\u4ee3\u7801\uff08decoder38.vhd\uff09 
library ieee\uff1b 
use ieee.std_log 
entity decoder38 is 
port(a: in std_logi
en: in std_logic 
y: out std_logic_v
r38\uff1b 
architecture a of 
signal sel: std_logic_vect 
begin 
sel 
sel(1)<=a(0)\uff1b
sel(2)<=a(1)\uff1b 
sel(3)<=a(2)\uff1b 
with sel select 
y<=\u201c00000001\u201d
y<=\u201c00000010\u201dwhen\u201c0011\u201d\uff0c 
y<=\u201c00000100\u201dwhen\u201c0101\u201d\uff0c 
y<=\u201c00001000\u201dwhen\u201c0111\u201d\uff0c 
y<=\u201c00010000\u201dwhen\u201c1001\u201d\uff0c 
y<=\u201c00100000\u201dwhen\u201c1011\u201d\uff0c 
y<=\u201c01000000\u201dwhen\u201c1101\u201d\uff0c 
y<=\u201c10000000\u201dwhen\u201c1111\u201d\uff0c 
y<=\u201c11111111\u201dwhen others\uff1b 
\u9009Assign\/D
\uff0c\u9009File\/Project\/Save & Compile \u83dc\u5355\uff0c\u7f16\u8bd1\u8bbe\u8ba1\u6587\u4ef6\u3002 
\u9009Ma
es from SNF\u83dc\u5355\u5c06\u8f93\u5165\u548c\u8f93\u51fa\u7aef\u53e3\u8c03\u5165\uff0c\u7136\u540e\u518d\u7f16\u8f91\uff09\u3002\u9009Max+plus2\/Simulator \u83dc\u5355
\u8fdb\u884c\u884c\u4e3a\u4eff\u771f\u3002 
\u89c2\u5bdf\u4eff
\u516d 
\u5199\u51fa\u8bbe\u8ba1\u601d\u60f3\u53ca
\u80fd\u53ca\u5b9a\u4e49\uff0c\u9a8c\u8bc1\u6587\u6863\u4e0e\u8c03\u8bd5\u7ed3\u679c\uff0c\u6700\u540e\u5199\u51fa\u7ed3\u8bba\u53ca\u5fc3\u5f97\u4f53\u4f1a\u3002 <\/p>\n

\u5b9e\u9a8c\u4e8c\u3001RS\u89e6\u53d1\u5668\u7684\u8bbe\u8ba1 
1\u3001\u719f\u6089MAX+
2\u3001\u590d\u4e60VHDL\u8bed\u8a00\u7684\u57fa\u7840\u77e5
3\u3001\u590d\u4e60\u6570\u5b57\u7535\u8def\u4e2dRS\u89e6\u53d1\u5668\u7684\u5de5 
\u4e8c
1\u3001\u638c\u63e1\u65f6\u5e8f\u903b
2\u3001\u4e86\u89e3VHDL\u6570\u636e\u6d41\u63cf\u8ff0\u548c\u884c\u4e3a\u63cf\u8ff0
3\u3001\u8fdb\u4e00\u6b65\u638c\u63e1MAX+plus\u2161\u8f6f\u4ef6\u7684\u57fa\u672c\u64cd\u4f5c\u4e0e
4\u3001\u8fdb\u4e00\u6b65\u4e86\u89e3\u53ef\u7f16\u7a0b\u5668\u4ef6\u7684\u8bbe\u8ba1\u5168\u8fc7\u7a0b\u3002 
\u4e09
RS\u89e6\u53d1\u5668 
\u4f7f\u7528\u6570\u636e\u6d41
\u65b9\u6cd5\u5728MAX+plus\u2161\u4e2d\u8bbe\u8ba1RS\u89e6\u53d1\u5668\uff0c\u5e76\u901a\u8fc7\u6ce2\u5f62\u4eff\u771f\u9a8c\u8bc1\u81ea\u5df1\u8bbe\u8ba1\u7684\u7535\u8def\uff0c\u6700\u540e\u505a
\u51fa\u5b9e\u9a8c\u62a5\u544a\u3002 
1\u3001\u8bbe\u8ba1\u8f93\u5165 
\u6253\u5f00MAX
\u4fdd\u5b58\u6587\u4ef6\uff0c\u6269\u5c55\u540d\u4e3a.vhd\u3002 
\u53c2\u8003\u7a0b\u5e8f\u4ee3\u7801\u5982\u4e0b(rsff1.vhd 
library ieee\uff1b 
use ieee.std_logi
use ieee.std_logic_arith.all\uff1b 
use ieee.std_logic_unsigned.all\uff1b 
entity rsff1 is 
port\uff08s\uff0cr\uff1a 
q, not_q: out std_logic<\/p>\n

\uff1b 
architecture a 
signal qn,not_qn: std_logi
begin 
qn 
not_qn <=s nor qn\uff1b 
q <=qn\uff1b 
not_q <= not_qn\uff1b
end a\uff1b 
library ieee\uff1b 
use ieee.std_logi
entity rsff is 
port\uff08s\uff0cr\uff1a
q, qb: out std_logic\uff09\uff1b
ff\uff1b 
architecture a 
signal q1,qb1:std_logic\uff1b
begin 
proce 
begin 
if(s=\u20191 
q1<=\u20190\u2019 \uff1b 
qb1<=\u20191\u2019 \uff1b 
elseif(s=\u20190\u2019and 
q1<=\u20191\u2019 \uff1b 
qb1<=\u20190\u2019 \uff1b 
else 
q1< 
qb1<=qb1\uff1b 
end if\uff1b 
end process\uff1b 
q<=q1\uff1b 
qb<=qb1\uff1b
end a\uff1b 
\u9009Assign\/D
\uff0c\u9009File\/Project\/Save & Compile \u83dc\u5355\uff0c\u7f16\u8bd1\u8bbe\u8ba1\u6587\u4ef6\u3002 
\u9009Ma
es from SNF\u83dc\u5355\u5c06\u8f93\u5165\u548c\u8f93\u51fa\u7aef\u53e3\u8c03\u5165\uff0c\u7136\u540e\u518d\u7f16\u8f91\uff09\u3002\u9009Max+plus2\/Simulator \u83dc\u5355<\/p>\n

\u8fdb\u884c\u884c\u4e3a\u4eff\u771f\u3002 
\u89c2\u5bdf\u4eff
\u516d 
\u5199\u51fa\u8bbe\u8ba1\u601d\u60f3\u53ca
\u80fd\u53ca\u5b9a\u4e49\uff0c\u9a8c\u8bc1\u6587\u6863\u4e0e\u8c03\u8bd5\u7ed3\u679c\uff0c\u6700\u540e\u5199\u51fa\u7ed3\u8bba\u53ca\u5fc3\u5f97\u4f53\u4f1a\u3002 
1\u3001\u719f\u6089MAX+
2\u3001\u590d\u4e60VHDL\u8bed\u8a00\u7684\u57fa\u7840\u77e5
3\u3001\u601d\u8003\u5206\u9891\u7535\u8def\u7684\u5de5\u4f5c\u539f\u7406\u3002 
\u4e8c
1\u3001\u638c\u63e1\u5206\u9891\u7535
2\u3001\u8fdb\u4e00\u6b65\u638c\u63e1VHDL\u63cf\u8ff0\u65b9\u6cd5\u3002
3\u3001\u8fdb\u4e00\u6b65\u638c\u63e1MAX+plus\u2161\u8f6f\u4ef6\u7684
4\u3001\u8fdb\u4e00\u6b65\u4e86\u89e3\u53ef\u7f16\u7a0b\u5668\u4ef6\u7684\u8bbe\u8ba1\u5168\u8fc7\u7a0b\u3002 
\u4e09
\u5728\u5b9e\u9645\u5e94\u7528
\u65f6\u949f\u9891\u7387\uff0c\u91c7\u7528\u4f4e\u9891\u7387\u65f6\u949f\u4fe1\u53f7\u7684\u8bbe\u5907\u5982\u679c\u4f7f\u7528\u9ad8\u9891\u7387\u7684\u65f6\u949f\u5f80\u5f80\u51fa\u73b0\u9519\u8bef\u6216\u8005\u4e0d\u7a33\u5b9a
\u7684\u60c5\u51b5\uff0c\u5982\u952e\u76d8\u626b\u63cf\u5bb9\u6613\u51fa\u9519\uff0c\u6570\u7801\u7ba1\u4f1a\u95ea\u70c1\u7b49\u60c5\u51b5\u3002\u6240\u4ee5\u5e38\u5e38\u9700\u8981\u7528\u5230\u5206\u9891\u7535\u8def\u3002\u5206\u9891\u7535
\u8def\u5305\u62ec\u4e00\u4e2a\u65f6\u949f\u8f93\u5165\uff08Clkin\uff09\uff0c\u4e00\u4e2a\u65f6\u949f\u8f93\u51fa\uff08Clkout\uff09\u3002\u4f7f\u7528\u4e00\u4e2a\u4e2d\u95f4\u53d8\u91cfCounter\u4fe1\u53f7\uff0c
Counter\u4fe1\u53f7\u4ece0\u5f00\u59cb\uff0c\u6bcf\u5f53\u7b2cN\u4e2a\u4e0a\u5347\u6cbf\u5230\u6765\u65f6\uff0cCounter\u4fe1\u53f7\u53d8\u4e3a0\uff0c\u540c\u65f6\u65f6\u949f\u8f93\u51fa\uff08Clkout\uff09
\u7ffb\u8f6c\u4e00\u6b21\uff0c\u4ee5\u6b64\u8fbe\u5230\u5206\u9891\u76ee\u7684\u3002 
\u4f7f\u7528VHD
\uff0c\u6700\u540e\u505a\u51fa\u5b9e\u9a8c\u62a5\u544a\u3002 
1\u3001\u8bbe\u8ba1\u8f93\u5165 
\u6253\u5f00MAX
\u4fdd\u5b58\u6587\u4ef6\uff0c\u6269\u5c55\u540d\u4e3a.vhd\u3002 
\u53c2\u8003\u7a0b\u5e8f\u4ee3\u7801\u5982\u4e0b(frediv.vh 
library ieee\uff1b 
use ieee.std_lo
entity frediv is 
port\uff08clkin\uff1a i
clkout: out std_logic\uff09\uff1b <\/p>\n

ediv\uff1b 
architecture a 
constant n\uff1ainteger\uff1a=3\uff1b 
signal counter\uff1ainteger ran 
signal clk:std_logic\uff1b 
gin 
p 
begin 
if ri 
if counter=n then –\u6bcf\u8ba1\u5230
counter<=0\uff1b 
clk<=not clk\uff1b 
else 
count 
end if\uff1b 
end if\uff1b 
end process\uff1b 
clkout<=clk\uff1b 
end a\uff1b 
\u9009Assign\/D
\uff0c\u9009File\/Project\/Save & Compile \u83dc\u5355\uff0c\u7f16\u8bd1\u8bbe\u8ba1\u6587\u4ef6\u3002 
\u9009Ma
es from SNF\u83dc\u5355\u5c06\u8f93\u5165\u548c\u8f93\u51fa\u7aef\u53e3\u8c03\u5165\uff0c\u7136\u540e\u518d\u7f16\u8f91\uff09\u3002\u9009Max+plus2\/Simulator \u83dc\u5355
\u8fdb\u884c\u884c\u4e3a\u4eff\u771f\u3002 
4\u3001\u4e0b\u8f7d 
\u89c2\u5bdf\u4eff
\u516d 
\u5199\u51fa\u8bbe\u8ba1\u601d\u60f3\u53ca
\u80fd\u53ca\u5b9a\u4e49\uff0c\u9a8c\u8bc1\u6587\u6863\u4e0e\u8c03\u8bd5\u7ed3\u679c\uff0c\u6700\u540e\u5199\u51fa\u7ed3\u8bba\u53ca\u5fc3\u5f97\u4f53\u4f1a\u3002 
1\u3001\u719f\u6089MAX+
2\u3001\u590d\u4e60VHDL\u8bed\u8a00\u7684\u57fa\u7840\u77e5
3\u3001\u601d\u8003\u53ef\u9006\u8ba1\u6570\u5668\u7684\u8bbe
\n\u8ba1\u601d\u60f3\u548c\u5de5 
\u4e8c
1\u3001\u638c\u63e1\u53ef\u9006\u8ba1<\/p>\n

2\u3001\u8fdb\u4e00\u6b65\u638c\u63e1VHDL\u63cf\u8ff0\u65b9\u6cd5\u3002 
3\u3001\u8fdb\u4e00\u6b65\u638c\u63e1MAX+plus\u2161\u8f6f\u4ef6\u7684
4\u3001\u8fdb\u4e00\u6b65\u4e86\u89e3\u53ef\u7f16\u7a0b\u5668\u4ef6\u7684\u8bbe\u8ba1\u5168\u8fc7\u7a0b\u3002 
\u4e09
\u8ba1\u6570\u5668\u5728\u5b9e
\u53f7\uff08dir\uff09\uff0c\u4ee5\u53ca\u4e8c\u8fdb\u5236\u8f93\u51fa\u5411\u91cf\uff08q\uff09\u5bf9\u8f93\u5165\u65f6\u949f\u4fe1\u53f7\u8fdb\u884c\u8ba1\u6570\uff0c\u5f53\u63a7\u5236\u4fe1\u53f7dir\u4e3a0\u65f6\uff0c
\u8ba1\u6570\u5668\u8fdb\u884c\u52a0\u8ba1\u6570\uff0c\u8ba1\u6570\u503c\u4e0d\u65ad\u589e\u52a0\uff0c\u53cd\u4e4b\uff0c\u5f53\u63a7\u5236\u4fe1\u53f7dir\u4e3a1\u65f6\uff0c\u8ba1\u6570\u5668\u8fdb\u884c\u51cf\u8ba1\u6570\uff0c
\u8ba1\u6570\u503c\u4e0d\u65ad\u51cf\u5c11\u3002 
\u4f7f\u7528VHD
\u7535\u8def\uff0c\u6700\u540e\u505a\u51fa\u5b9e\u9a8c\u62a5\u544a\u3002 
1\u3001\u8bbe\u8ba1\u8f93\u5165 
\u6253\u5f00MAX
\u4fdd\u5b58\u6587\u4ef6\uff0c\u6269\u5c55\u540d\u4e3a.vhd\u3002 
\u53c2\u8003\u7a0b\u5e8f\u4ee3\u7801\u5982\u4e0b(bi3cnt.vh 
library ieee\uff1b 
use ieee.std_log
use ieee.std_logic_arith.all\uff1b 
use ieee.std_logic_unsigned.all\uff1b 
entity bi3cnt is 
port\uff08clk\uff0cdir
q : out std_logic_vec 
architecture a 
signal qn\uff1astd_logic_vect 
begin 
pro 
begin 
if clk 
if dir=\u20190\u2019then 
qn<=qn+1\uff1b 
else 
qn<=qn- 
end if\uff1b 
end if\uff1b 
end process\uff1b 
q=qn\uff1b 
end a\uff1b 
2\u3001<\/p>\n

\u9009Assign\/D
\uff0c\u9009File\/Project\/Save & Compile \u83dc\u5355\uff0c\u7f16\u8bd1\u8bbe\u8ba1\u6587\u4ef6\u3002 
\u9009Ma
es from SNF\u83dc\u5355\u5c06\u8f93\u5165\u548c\u8f93\u51fa\u7aef\u53e3\u8c03\u5165\uff0c\u7136\u540e\u518d\u7f16\u8f91\uff09\u3002\u9009Max+plus2\/Simulator \u83dc\u5355
\u8fdb\u884c\u884c\u4e3a\u4eff\u771f\u3002 
4\u3001\u4e0b\u8f7d 
\u89c2\u5bdf\u4eff
\u516d 
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