{"id":107133,"date":"2026-09-19T04:19:49","date_gmt":"2026-09-18T20:19:49","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/107133.html"},"modified":"2026-09-19T04:19:49","modified_gmt":"2026-09-18T20:19:49","slug":"8bit%e6%95%b0%e6%8d%ae%e5%b7%ae%e5%80%bc%e4%b8%8e%e6%9c%80%e5%b0%8f%e5%80%bc%e8%ae%a1%e7%ae%97%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/107133.html","title":{"rendered":"8bit\u6570\u636e\u5dee\u503c\u4e0e\u6700\u5c0f\u503c\u8ba1\u7b97\u5b9e\u6218"},"content":{"rendered":"

\u6839\u636e\u8f93\u5165\u4fe1\u53f7a,b\u7684\u5927\u5c0f\u5173\u7cfb，\u6c42\u89e3\u4e24\u4e2a\u6570\u7684\u5dee\u503c：\u8f93\u5165\u4fe1\u53f7a,b\u4e3a8bit\u4f4d\u5bbd\u7684\u65e0\u7b26\u53f7\u6570\u3002\u5982\u679ca>b，\u5219\u8f93\u51faa-b，\u5982\u679ca\u2264b，\u5219\u8f93\u51fab-a\u3002<\/p>\n

`timescale 1ns\/1ns
\nmodule data_minus(
\ninput clk,
\ninput rst_n,
\ninput [7:0]a,
\ninput [7:0]b,<\/p>\n

output reg [8:0]c
\n);<\/p>\n

always@(posedge clk or negedge rst_n) begin
\nif(rst_n == 'd0) begin
\nc<='d0;
\nend
\nelse if(a>b) begin
\nc<=a-b;
\nend
\nelse begin
\nc<= b-a;
\nend
\nend<\/p>\n

endmodule<\/p>\n<\/p>\n

\u4f7f\u7528generate\u2026for\u8bed\u53e5\u7b80\u5316\u4ee3\u7801<\/p>\n

\u00a0\u00a0\u00a0 genvar i;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/\u58f0\u660e\u5faa\u73af\u53d8\u91cf\u4e3a\u975e\u8d1f\u6574\u6570<\/p>\n

\u00a0\u00a0\u00a0 generate<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 for(i = 0; i < 8; i = i + 1) \u00a0\u00a0\u00a0\u00a0 \/\/\u5faa\u73af\u6761\u4ef6<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 begin : bit_reverse\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/begin\u2026end\u5757\u4e2d\u4e3a\u5f85\u751f\u6210\u7684\u4ee3\u7801\u539f\u578b<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 assign data_out[i] = data_in[7 – i];<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 end<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 endgenerate<\/p>\n

\u00a0 \u00a0\u00a0\u00a0\u5728begin\u4e4b\u540e\u7684bit_reverse\u662f\u9700\u8981\u7684，\u8868\u793a\u8be5generate\u2026for\u8bed\u53e5\u5757\u7684\u540d\u79f0，\u53ef\u4ee5\u6839\u636e\u9700\u8981\u4fee\u6539\u3002\u7279\u522b\u9700\u8981\u6ce8\u610f\u7684\u662f，\u5373\u4f7f\u53ea\u6709\u4e00\u4e2a\u8bed\u53e5，\u4e5f\u9700\u8981\u4f7f\u7528begin\u2026end\u3002\u540c\u65f6\u9700\u8981\u4f7f\u7528endgenerate\u8868\u793a\u7ed3\u675f\u3002<\/p>\n<\/p>\n

（1）generate for\u7684\u5faa\u73af\u53d8\u91cf\u5fc5\u987b\u7528genvar\u58f0\u660e，for\u7684\u53d8\u91cf\u53ef\u4ee5\u7528reg\u3001integer\u6574\u6570\u7b49\u591a\u79cd\u7c7b\u578b\u58f0\u660e；<\/p>\n

（2）for\u53ea\u80fd\u7528\u5728always\u5757\u91cc\u9762，generate for\u53ef\u4ee5\u505aassign\u8d4b\u503c，\u7528always\u5757\u8bddalways\u5199\u5728generate for\u91cc；<\/p>\n

（3）generate for\u540e\u9762\u5fc5\u987b\u7ed9\u8fd9\u4e2a\u5faa\u73af\u8d77\u4e00\u4e2a\u540d\u5b57，for\u4e0d\u9700\u8981；<\/p>\n

（4）generate for\u8fd8\u53ef\u4ee5\u7528\u4e8e\u4f8b\u5316\u6a21\u5757；<\/p>\n<\/p>\n

\u5728\u6570\u5b57\u82af\u7247\u8bbe\u8ba1\u4e2d，\u901a\u5e38\u628a\u5b8c\u6210\u7279\u5b9a\u529f\u80fd\u4e14\u76f8\u5bf9\u72ec\u7acb\u7684\u4ee3\u7801\u7f16\u5199\u6210\u5b50\u6a21\u5757，\u5728\u9700\u8981\u7684\u65f6\u5019\u518d\u5728\u4e3b\u6a21\u5757\u4e2d\u4f8b\u5316\u4f7f\u7528，\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u590d\u7528\u6027\u548c\u8bbe\u8ba1\u7684\u5c42\u6b21\u6027，\u65b9\u4fbf\u540e\u7eed\u7684\u4fee\u6539\u3002<\/p>\n

\u8bf7\u7f16\u5199\u4e00\u4e2a\u5b50\u6a21\u5757，\u5c06\u8f93\u5165\u4e24\u4e2a8bit\u4f4d\u5bbd\u7684\u53d8\u91cfdata_a,data_b，\u5e76\u8f93\u51fadata_a,data_b\u4e4b\u4e2d\u8f83\u5c0f\u7684\u6570\u3002\u5e76\u5728\u4e3b\u6a21\u5757\u4e2d\u4f8b\u5316，\u5b9e\u73b0\u8f93\u51fa\u4e09\u4e2a8bit\u8f93\u5165\u4fe1\u53f7\u7684\u6700\u5c0f\u503c\u7684\u529f\u80fd\u3002<\/p>\n

`timescale 1ns\/1ns
\nmodule main_mod(
\ninput clk,
\ninput rst_n,
\ninput [7:0]a,
\ninput [7:0]b,
\ninput [7:0]c,<\/p>\n

output [7:0]d
\n);<\/p>\n

wire [7:0]min1,min2;<\/p>\n

min2 minab(
\n.clk(clk),
\n.rst_n(rst_n),
\n.a(a),
\n.b(b),
\n.c(min1)
\n);<\/p>\n

min2 minac(
\n.clk(clk),
\n.rst_n(rst_n),
\n.a(a),
\n.b(c),
\n.c(min2)
\n);<\/p>\n

min2 min3(
\n.clk(clk),
\n.rst_n(rst_n),
\n.a(min1),
\n.b(min2),
\n.c(d)
\n);<\/p>\n

endmodule<\/p>\n

module min2(
\ninput wire clk,
\ninput wire rst_n,
\ninput wire [7:0] a,
\ninput wire [7:0]b,
\noutput reg [7:0]c<\/p>\n

);<\/p>\n

always@(posedge clk or negedge rst_n) begin
\nif(!rst_n) begin
\nc <= 'd0;
\nend
\nelse if(a<b) begin
\nc<= a;
\nend
\nelse if(a>b) begin
\nc<= b;
\nend
\nelse c<='d0;
\nend<\/p>\n

endmodule<\/p>\n

\u5728\u6570\u5b57\u82af\u7247\u8bbe\u8ba1\u4e2d，\u7ecf\u5e38\u628a\u5b9e\u73b0\u7279\u5b9a\u529f\u80fd\u7684\u6a21\u5757\u7f16\u5199\u6210\u51fd\u6570，\u5728\u9700\u8981\u7684\u65f6\u5019\u518d\u5728\u4e3b\u6a21\u5757\u4e2d\u8c03\u7528，\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u63d0\u9ad8\u8bbe\u8ba1\u7684\u5c42\u6b21，\u5206\u522b\u540e\u7eed\u7684\u4fee\u6539\u3002<\/p>\n

\u8bf7\u7528\u51fd\u6570\u5b9e\u73b0\u4e00\u4e2a4bit\u6570\u636e\u5927\u5c0f\u7aef\u8f6c\u6362\u7684\u529f\u80fd\u3002\u5b9e\u73b0\u5bf9\u4e24\u4e2a\u4e0d\u540c\u7684\u8f93\u5165\u5206\u522b\u8f6c\u6362\u5e76\u8f93\u51fa\u3002<\/p>\n

\u5728Verilog HDL\u4e2d，\u51fd\u6570\u7684\u58f0\u660e\u7531\u5173\u952e\u5b57function\u5f00\u59cb，endfunction\u7ed3\u675f\u3002\u5bf9\u4e8e\u51fd\u6570\u4e2d\u7684\u8bed\u53e5\u9700\u8981\u7528begin\u2026end\u5305\u542b，\u5373\u4f7f\u53ea\u6709\u4e00\u53e5\u3002\u51fd\u6570\u7684\u58f0\u660e\u6a21\u677f\u5982\u4e0b：<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 function [range-1:0] function_name ;<\/p>\n

input_declaration ;<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 other_declaration ;<\/p>\n

procedural_statement ;<\/p>\n

endfunction<\/p>\n

\u51fd\u6570\u5728\u58f0\u660e\u65f6，\u4f1a\u9690\u5f0f\u7684\u58f0\u660e\u4e00\u4e2a\u5bbd\u5ea6\u4e3a\u00a0range\u3001 \u540d\u5b57\u4e3a\u00a0function_id\u00a0\u7684\u5bc4\u5b58\u5668\u53d8\u91cf，\u51fd\u6570\u7684\u8fd4\u56de\u503c\u901a\u8fc7\u8fd9\u4e2a\u53d8\u91cf\u8fdb\u884c\u4f20\u9012\u3002\u5f53\u8be5\u5bc4\u5b58\u5668\u53d8\u91cf\u6ca1\u6709\u6307\u5b9a\u4f4d\u5bbd\u65f6，\u9ed8\u8ba4\u4f4d\u5bbd\u4e3a\u00a01\u3002\u7136\u540e\u8fdb\u884c\u8f93\u5165\u53d8\u91cf\u7684\u58f0\u660e\u548c\u5176\u5b83\u58f0\u660e\u3002<\/p>\n

\u51fd\u6570\u901a\u8fc7\u6307\u660e\u51fd\u6570\u540d\u4e0e\u8f93\u5165\u53d8\u91cf\u8fdb\u884c\u8c03\u7528\u3002\u51fd\u6570\u7ed3\u675f\u65f6，\u8fd4\u56de\u503c\u88ab\u4f20\u9012\u5230\u8c03\u7528\u5904\u3002<\/p>\n

\u51fd\u6570\u8c03\u7528\u683c\u5f0f\u5982\u4e0b：<\/p>\n

function_name(input1, input2, \u2026);<\/p>\n

\u901a\u8fc7\u51fd\u6570\u540d\u8c03\u7528\u51fd\u6570，\u5e76\u5728\u53c2\u6570\u5217\u8868\u4e2d\u586b\u5165\u8f93\u5165\u53c2\u6570\u3002<\/p>\n

\u8981\u5b9e\u73b0\u5927\u5c0f\u7aef\u8f6c\u6362，\u5373\u5c06\u8f93\u5165\u6570\u503c\u7684\u6700\u9ad8\u4f4d\u8d4b\u4e88\u8f93\u51fa\u7684\u6700\u4f4e\u4f4d，\u6b21\u9ad8\u4f4d\u8d4b\u4e88\u6b21\u4f4e\u4f4d，\u4f9d\u6b21\u7c7b\u63a8\u5373\u53ef\u3002<\/p>\n

function [3:0] data_rev;<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 input [3:0] data_in;<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 begin<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0data_rev[0] = data_in[3];<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0data_rev[1] = data_in[2];<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0data_rev[2] = data_in[1];<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0data_rev[3] = data_in[0];<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 end<\/p>\n

endfunction<\/p>\n

\u51fd\u6570\u7f16\u5199\u5b8c\u6210，\u5219\u53ef\u4ee5\u5728\u591a\u4e2a\u4f4d\u7f6e\u8fdb\u884c\u8c03\u7528，\u8f93\u5165\u4e0d\u540c\u7684\u53c2\u6570，\u5b9e\u73b0\u5bf9\u4e0d\u540c\u6570\u636e\u7684\u64cd\u4f5c<\/p>\n

`timescale 1ns\/1ns
\nmodule function_mod(
\ninput [3:0]a,
\ninput [3:0]b,<\/p>\n

output [3:0]c,
\noutput [3:0]d
\n);<\/p>\n

assign c = data_rev(a);
\nassign d = data_rev(b);<\/p>\n

function [3:0] data_rev;
\ninput [3:0] data_in;
\nbegin
\ndata_rev[0] = data_in[3];
\ndata_rev[1] = data_in[2];
\ndata_rev[2] = data_in[1];
\ndata_rev[3] = data_in[0];
\nend
\nendfunction<\/p>\n

endmodule<\/p>\n

\u67d04\u4f4d\u6570\u503c\u6bd4\u8f83\u5668\u7684\u529f\u80fd\u8868\u5982\u4e0b\u3002<\/p>\n

\u8bf7\u7528Verilog\u8bed\u8a00\u91c7\u7528\u95e8\u7ea7\u63cf\u8ff0\u65b9\u5f0f，\u5b9e\u73b0\u6b644\u4f4d\u6570\u503c\u6bd4\u8f83\u5668<\/p>\n

\"\"<\/p>\n

`timescale 1ns\/1ns<\/p>\n

module comparator_4(
\ninput[3:0] A ,
\ninput [3:0]B ,<\/p>\n

output wireY2 , \/\/A>B
\noutput wire Y1 , \/\/A=B
\n output wire Y0 \/\/A<B
\n);<\/p>\n

assign Y2 = ((A[3]>B[3]) || ((A[3]==B[3] && A[2]>B[2])) || (A[3]==B[3] && A[2]==B[2] && A[1]>B[1]) || (A[3]==B[3] && A[2]==B[2] && A[1]==B[1] && A[0] > B[0]) ) ? 1:0;
\nassign Y1 = (A[3]==B[3] && A[2]==B[2] && A[1]==B[1] && A[0]==B[0]) ? 1:0;
\nassign Y0 = ((A[3]<B[3]) || ((A[3]==B[3] && A[2]<B[2])) || (A[3]==B[3] && A[2]==B[2] && A[1]<B[1]) || (A[3]==B[3] && A[2]==B[2] && A[1]==B[1] && A[0] < B[0]) ) ? 1:0;<\/p>\n

endmodule<\/p>\n

\u8d85\u524d\u8fdb\u4f4d\u52a0\u6cd5\u5668<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

\u6839\u636e\u8f93\u5165\u4fe1\u53f7a,b\u7684\u5927\u5c0f\u5173\u7cfb，\u6c42\u89e3\u4e24\u4e2a\u6570\u7684\u5dee\u503c：\u8f93\u5165\u4fe1\u53f7a,b\u4e3a8bit\u4f4d\u5bbd\u7684\u65e0\u7b26\u53f7\u6570\u3002\u5982\u679ca>b，\u5219\u8f93\u51faa-b，\u5982\u679ca\u2264b，\u5219\u8f93\u51fab-a\u3002timescale 1ns\/1ns
\nmodule data_minus(
\ninput clk,
\ninput rst_n,
\ninput [7:0]a,
\ninput [7:0]b,output reg [8:0]c
\n);always(posedge clk or nege<\/p>\n","protected":false},"author":2,"featured_media":107132,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[977],"topic":[],"class_list":["post-107133","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-977"],"yoast_head":"\n8bit\u6570\u636e\u5dee\u503c\u4e0e\u6700\u5c0f\u503c\u8ba1\u7b97\u5b9e\u6218 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/107133.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"8bit\u6570\u636e\u5dee\u503c\u4e0e\u6700\u5c0f\u503c\u8ba1\u7b97\u5b9e\u6218 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6839\u636e\u8f93\u5165\u4fe1\u53f7a,b\u7684\u5927\u5c0f\u5173\u7cfb，\u6c42\u89e3\u4e24\u4e2a\u6570\u7684\u5dee\u503c：\u8f93\u5165\u4fe1\u53f7a,b\u4e3a8bit\u4f4d\u5bbd\u7684\u65e0\u7b26\u53f7\u6570\u3002\u5982\u679ca>b，\u5219\u8f93\u51faa-b，\u5982\u679ca\u2264b，\u5219\u8f93\u51fab-a\u3002timescale 1ns\/1ns module data_minus( input clk, input rst_n, input [7:0]a, input [7:0]b,output reg [8:0]c );always(posedge clk or nege\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/107133.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-18T20:19:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260918201947-6aad9ce3e82c0.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/107133.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/107133.html\",\"name\":\"8bit\u6570\u636e\u5dee\u503c\u4e0e\u6700\u5c0f\u503c\u8ba1\u7b97\u5b9e\u6218 - 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