verilog移位 Verilog如何用移位操作符"<<"或">>"来实现串并4...
verilog\u4e2d\u79fb\u4f4d\u64cd\u4f5c\u7b26\u53f7verilog\u4e2d\u79fb\u4f4d\u64cd\u4f5c\u7b26\u53f7\u67092\u79cd\uff0c\u5206\u522b\u662f\u201c>\u201d\u53f3\u79fb\u4f4d\u8fd0\u7b97\u7b26\u3002
\u683c\u5f0f\u5982\u4e0b\uff1aa>n\u3002\u5176\u4e2d\uff0ca\u4ee3\u8868\u8981\u79fb\u4f4d\u7684\u64cd\u4f5c\u6570\uff0cn\u4ee3\u8868\u8981\u79fb\u51e0\u4f4d\u3002\u4e24\u79cd\u8fd0\u7b97\u65b9\u5f0f\u90fd\u75280\u6765\u586b\u8865\u79fb\u51fa\u7684\u7a7a\u4f4d\u3002
\u79fb\u4f4d\u64cd\u4f5c\u7b26\u5bf9\u5de6\u8fb9\u7684\u64cd\u4f5c\u6570\u8fdb\u884c\u5411\u5de6\u6216\u5411\u53f3\u7684\u4f4d\u79fb\u4f4d\u64cd\u4f5c\uff0c\u7b2c\u4e8c\u4e2a\u64cd\u4f5c\u6570\uff0c\u79fb\u4f4d\u4f4d\u6570\u662f\u65e0\u7b26\u53f7\u6570\uff0c\u9075\u5faa\u7684\u64cd\u4f5c\u89c4\u5f8b\u662f\u201c\u5de6\u79fb\u65f6\u5148\u8865\u540e\u79fb\uff0c\u53f3\u79fb\u65f6\u5148\u79fb\u540e\u8865\u201d\u3002
\u5728\u8fdb\u884c\u79fb\u4f4d\u8fd0\u7b97\u65f6\uff0c\u5e94\u5f53\u6ce8\u610f\u79fb\u4f4d\u524d\u540e\u53d8\u91cf\u7684\u4f4d\u6570\u3002\u5982\u679c\u64cd\u4f5c\u6570\u5df2\u7ecf\u5b9a\u4e49\u4e86\u4f4d\u5bbd\uff0c\u5219\u8fdb\u884c\u79fb\u4f4d\u540e\u64cd\u4f5c\u6570\u6539\u53d8\uff0c\u4f46\u662f\u5176\u4f4d\u5bbd\u4e0d\u53d8\u3002
\u6269\u5c55\u8d44\u6599
verilog HDL\u8fd0\u7b97\u7b26
1\u3001\u903b\u8f91\u8fd0\u7b97\u7b26\uff1a&&\u903b\u8f91\u4e0e\uff1b||\u903b\u8f91\u6216\uff1b\uff01\u903b\u8f91\u975e\u3002
2\u3001\u5173\u7cfb\u8fd0\u7b97\u7b26\uff1a\u5927\u4e8e\u3001=\u5927\u4e8e\u7b49\u4e8e\u3002
3\u3001\u7b49\u5f0f\u8fd0\u7b97\u7b26\uff1a==\u7b49\u4e8e\u3001!=\u4e0d\u7b49\u4e8e\u3001===\u7b49\u4e8e\u3001!==\u4e0d\u7b49\u4e8e\u3002
4\u3001\u79fb\u4f4d\u8fd0\u7b97\u7b26\uff1a>\u53f3\u79fb\u4f4d\u3002
5\u3001\u4f4d\u62fc\u63a5\u8fd0\u7b97\u7b26\uff1a{a1\uff0ca2\uff0ca3.......}
6\u3001\u7f29\u51cf\u8fd0\u7b97\u7b26\uff1a\u5148\u5c06\u64cd\u4f5c\u6570\u7684\u7b2c\u4e00\u4f4d\u4e0e\u7b2c\u4e8c\u4f4d\u8fdb\u884c\u4e0e\u3001\u6216\u3001\u975e\u8fd0\u7b97\uff0c\u7136\u540e\u5c06\u7ed3\u679c\u4e0e\u7b2c\u4e09\u4f4d\u8fdb\u884c\u4e0e\u3001\u6216\u3001\u975e\u8fd0\u7b97\uff0c\u4f9d\u6b21\u7c7b\u63a8\uff0c\u76f4\u81f3\u6700\u540e\u4e00\u4f4d\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u300aVerilog\u6570\u5b57\u7cfb\u7edf\u8bbe\u8ba1\u6559\u7a0b \u3010\u7b2c3\u7248\u3011\u300b \u590f\u5b87\u95fb \u7f16\u8457 \u5317\u4eac\u822a\u7a7a\u822a\u5929\u51fa\u7248\u793e
\u7b2c4\u7ae0 \u8fd0\u7b97\u7b26\u3001\u8d4b\u503c\u8bed\u53e5\u548c\u7ed3\u6784\u8bf4\u660e\u8bed\u53e5 4.4 \u79fb\u4f4d\u8fd0\u7b97\u7b26
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1--Verilog HDL
\u6069 \u79fb\u4f4d\u5bc4\u5b58\u5668\u7684\u8bdd\u8fd9\u91cc\u6709\u4e24\u4e2a\u4f8b\u5b50\uff0c\u697c\u4e3b\u4f60\u53c2\u8003\u4e00\u4e0b
\u7b2c\u4e00\u4e2a\u662f\u7528\u4f4d\u62fc\u63a5\u7b26\u6765\u505a\u7684\uff0c\u5728\u767e\u5ea6\u4e0a\u8f93\u5165\u201cVerilog \u4e32\u5e76\u8f6c\u6362\u201d\u5f88\u5bb9\u6613\u5c31\u67e5\u5230\u4e86\uff0c\u8fd9\u4e2a\u662f\u522b\u4eba\u7684\u51fd\u6570\uff0c\u6211\u628a\u540d\u5b57\u6362\u6210\u4f60\u7684\uff0c\u53ef\u4ee5\u76f4\u63a5\u7528\u5230\u81ea\u5df1\u7684\u5e94\u7528\u4e2d\u3002
module Serial_to_Para(clk,reset,en,in,out);
input clk,reset,en,in;
output[3:0] out;
reg[3:0] out;
always @(posedge clk)
begin
if(reset)
out<=4'h0;
else
if(en)
out<={out[2:0],in}; //\u4f7f\u7528\u8fde\u63a5\u8fd0\u7b97\u7b26
end
endmodule
\u4e0a\u9762\u90a3\u4e2aout<={out[2:0],in};\u8fd9\u4e00\u53e5\u53ef\u4ee5\u6362\u6210out<={in\uff0cout[3:1]};\u8fd9\u6837\u5c31\u53d8\u6210\u4e86\u4ece\u9ad8\u4f4d\u79fb\u5165\uff0c\u5f88\u5bb9\u6613\u6539\u6210\u53cc\u5411\u79fb\u4f4d\u5bc4\u5b58\u5668\u3002
\u53e6\u5916\u4e00\u79cd\u662f\u6bd4\u8f83\u8d34\u8fd1\u697c\u4e3b\u8bbe\u8ba1\u601d\u60f3\u7684\u4ee3\u7801\u4f8b\u5b50\u4e86\uff0c\u5728\u767e\u5ea6\u53ef\u4ee5\u641c\u5230\uff0c\u8fd9\u91cc\u653e\u51fa\u6765\u4f60\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b\u3002
module Serial_to_Para(clk,rst,in,out)
input clk,rst;
input in;
output[3:0] out;
wire[3:0] out;
reg [3:0] shiftreg;
always@(posedge clk or negedge rst) // \u5f02\u6b65\u6e05\u96f6
if(!rst)
shiftreg<=0;
else begin
shiftreg[0]<=in;
shiftreg[1]<=shiftreg[0];
shiftreg[2]<=shiftreg[1];
shiftreg[3]<=shiftreg[2];
end
assign out=shiftreg;
endmodule
\u731c\u6d4b\u4e00\u4e0b\uff0c\u697c\u4e3b\u60f3\u8981\u4f7f\u7528\u201c<<\u201d\u8fd0\u7b97\u7b26\u662f\u4e3a\u4e86\u8fbe\u5230D\u89e6\u53d1\u5668\u7ea7\u8054\u5b9e\u73b0\u4e32\u5e76\u8f6c\u6362\u7684\u6548\u679c\u5bf9\u5427\uff1f\u5982\u679c\u662f\u7684\u8bdd\u90a3\u4e48\u7b2c\u4e8c\u4e2a\u4f8b\u5b50\u521a\u597d\u662f\u8fd9\u4e2a\u4e86\u3002\u5bf9\u4e8e\u4f60\u7684\u4ee3\u7801\u4e2d<<\u64cd\u4f5c\u9020\u6210\u4eff\u771f\u7ed3\u679c\u4e0d\u6b63\u786e\u7684\u60c5\u51b5\uff0c\u8fd8\u6682\u65f6\u6ca1\u5206\u6790\u51fa\u6765\u662f\u600e\u4e48\u56de\u4e8b\u3002\u53ef\u4ee5\u7b49\u7b49\u770b\u6709\u6ca1\u6709\u4eba\u53ef\u4ee5\u5e2e\u5230\u4f60\u3002\u5982\u679c\u53ea\u662f\u9700\u8981\u627e\u5230\u66ff\u4ee3\u7b97\u6cd5\u7684\u8bdd\uff0c\u5e0c\u671b\u4e0a\u9762\u4e24\u4e2a\u4f8b\u5b50\u53ef\u4ee5\u5bf9\u4f60\u6709\u5e2e\u52a9\u3002
>>和>>>不一样 >>是逻辑右移 补零 >>>是算数右移 根据数据是有符号或无符号类型判断补符号位或零
绛旓細verilog涓Щ浣嶆搷浣滅鍙锋湁2绉嶏紝鍒嗗埆鏄<<鈥濆乏绉讳綅杩愮畻绗﹀拰鈥>>鈥濆彸绉讳綅杩愮畻绗銆傛牸寮忓涓嬶細a<<n锛宎>>n銆傚叾涓紝a浠ｈ〃瑕佺Щ浣嶇殑鎿嶄綔鏁帮紝n浠ｈ〃瑕佺Щ鍑犱綅銆備袱绉嶈繍绠楁柟寮忛兘鐢0鏉ュ～琛ョЩ鍑虹殑绌轰綅銆傜Щ浣嶆搷浣滅瀵瑰乏杈圭殑鎿嶄綔鏁拌繘琛屽悜宸︽垨鍚戝彸鐨勪綅绉讳綅鎿嶄綔锛岀浜屼釜鎿嶄綔鏁帮紝绉讳綅浣嶆暟鏄棤绗﹀彿鏁帮紝閬靛惊鐨勬搷浣滆寰...
绛旓細鍦Verilog鐨勪笘鐣岄噷锛屾瘡涓閬撳惊鐜绉讳綅鐨勪唬鐮佽儗鍚庯紝閮介殣钘忕潃浼樺寲鐨勬櫤鎱с傞氳繃娣卞叆鐞嗚В骞剁伒娲昏繍鐢ㄨ繖浜涙妧宸э紝鎴戜滑鍙互灏嗚璁℃彁鍗囧埌鏂扮殑楂樺害锛岃纭欢鐨勬ц兘涓庢晥鐜囧彂鎸ュ埌鏋佽嚧銆
绛旓細鍦ㄦ暟瀛楅昏緫璁捐涓紝绾挎у弽棣绉讳綅瀵勫瓨鍣紙Linear Feedback Shift Register, LFSR锛夋槸涓绉嶄笉鍙垨缂虹殑宸ュ叿锛屽畠浠ヤ綅涓哄崟浣嶅瓨鍌ㄦ暟鎹紝閫氳繃鎶藉ご鍜屽弽棣堝嚱鏁板疄鐜板懆鏈熸х殑鐘舵佸彉鍖栥侺FSR鐨勬牳蹇冨湪浜庡叾绾ф暟锛屽喅瀹氫簡瀛樺偍浣嶆暟鍜屾渶闀垮惊鐜懆鏈燂紝绾ф暟瓒婇珮锛屽瓨鍌ㄤ綅瓒婂锛屽懆鏈熶篃瓒婇暱锛屽懆鏈熺殑璁＄畻鍏紡涓篭(2^n - 1\)锛屽叾涓...
绛旓細鍦Verilog涓紝缁勫悎閫昏緫绉讳綅璧嬪兼椂锛屽鏋滀娇鐢ㄧ殑鏄16浣嶇殑璧嬪兼搷浣滅锛堜緥濡"="锛夛紝鑰岀洰鏍囧彉閲忓彧鏈8浣嶇殑瀹藉害锛岄偅涔堥珮8浣嶄細涓㈠け鏄洜涓篤erilog浼氳嚜鍔ㄦ埅鏂洰鏍囧彉閲忕殑璧嬪肩粨鏋滐紝浠ラ傚簲鐩爣鍙橀噺鐨勫搴︺備緥濡傦紝濡傛灉鏈変互涓嬩唬鐮侊細```verilog reg [7:0] target_var;reg [15:0] source_var;assign target_var = ...
绛旓細銆愮瓟妗堛戯細鐢╒eriiog HDL璁捐鍏锋湁寮傛娓呴櫎鍜岄缃姛鑳界殑4浣嶅乏绉绉讳綅瀵勫瓨鍣ㄧ殑婧愮▼搴弐eg4_1.v濡備笅銆俶odule reg4_1(clk,clr,id,d,q);input clk,clr,id;input [3:0] d;output reg [3:0] q;always@(posedge clk or negedge clr)begin if(锝瀋lr)q=0;else begin if(1d)q=d;elseq=q锛滐紲...
绛旓細clr,set,out );input [7:0]in; //input data input clk; //input clock input en; //input enable high enable input clr; //input clear low enable input [2:0]set; //input set :set num of shift bit output [7:0]out;always@(posedge clk or negedge clr) begin:...
绛旓細寤鸿浣犵湅鐪verilog鏍囧噯鍏充簬bit padding鍜宻elf determined閮ㄥ垎鐨勮瑙ｃ傚叾涓浜庝綅绉昏繍绠楃鐨剆elf determined瑙勫垯鏄拰绗竴鍙傛暟鐩稿叧銆傚亣瀹歛鏄4涓猙it鐨勶紝b鏄8涓猙it鐨勩俛 << b鍙拰a鐨勯暱搴︾浉鍏筹紝鍜宐鏃犲叧銆傝繖閲岀敱a鐨勯暱搴﹀喅瀹氭渶缁堢殑浣嶅锛岃繖涓鍒欏氨鍙玸elf determined銆傚浜庡姞娉曡繍绠楃鐨刡it padding瑙勫垯鍒欐槸鍜屾渶闀...
绛旓細module Verilog1(clk,ldn,k,d,q);input clk,ldn,k;input [7:0] d;output [7:0] q;reg[7:0] d_reg,q_reg;always@(negedge ldn)if(!ldn)d_reg <= d;always@(posedge clk )begin if(k)begin//right q_reg[7:0] <= {1'b00,d_reg[7:1]};end else q_reg[7:0] <= ...
绛旓細銆1銆戜綘鐨勭悊瑙ｆ槸瀵圭殑锛佷綘鍦ㄤ竴涓猘lways閲岄潰鐢ㄤ袱娆￠潪闃诲璧嬪硷紝鍦ㄤ竴涓椂閽熻竟娌垮鐞嗗悓涓涓彉閲廻x锛屽氨鎴愪簡杩欐牱銆傘2銆戜綘鎸夎繖涓濊矾鎯筹細鍦╤x琚祴鍊间互鍚庯紝鍏堜繚璇乭x涓嶅啀琚噸澶嶈祴鍊煎啿鎺夋暟鎹紝鐒跺悗鍐绉讳綅鎿嶄綔銆備緥濡傦紝璧嬪间互鍚庡姞涓涓娇鑳戒俊鍙凤紝鍦ㄤ娇鑳戒俊鍙蜂笅绉讳綅 銆3銆戞杩庨噰绾筹紒娆㈣繋鎻愰棶锛
绛旓細input [3:0] c;output [7:0] out;reg [7:0] out;always@(d or c)case(c)3'b000:out<=d;3'b001:out<={d[0],d[7:1]};3'b010:out<={d[1:0],d[7:2]};3'b011:out<={d[2:0],d[7:3]};3'b100:out<={d[3:0],d[7:4]};3'b101:out<={d[4:0],d[7:5]...
