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简易DDS发生器制作

news 2026/4/14 21:58:12

简易DDS发生器制作

简介

‌DDS 信号发生器‌是采用直接数字频率合成（Direct Digital Synthesis）技术的电子测量仪器，通过数字方式直接合成所需波形，具有‌频率分辨率高、切换速度快、相位连续‌等核心优势，广泛应用于通信、雷达、电子测量等领域。‌

描述基本模块

相位累加器

module phase_adder12b(clk, rst_n, phase_step, phase_out, datinv);input clk, rst_n;input [7:0] phase_step;output reg [9:0] phase_out;output reg datinv;reg [11:0] cnt;always @(posedge clk or negedge rst_n)if(!rst_n)cnt <= 12'b0;elsecnt <= cnt + phase_step;always @(cnt)case(cnt[11:10])2'b00: begin phase_out = cnt[9:0]; datinv = 0; end2'b01: begin phase_out = ~cnt[9:0]; datinv = 0; end2'b10: begin phase_out = cnt[9:0]; datinv = 1; end2'b11: begin phase_out = ~cnt[9:0]; datinv = 1; enddefault: begin phase_out = cnt[9:0]; datinv = 0; endendcaseendmodule

数据校正模块

module sin_dat_adj(input [7:0] din,input datflag,output wire [7:0] dout,output squ_out
);assign squ_out = datflag;
assign dout = datflag? ~ din + 1 : din;endmodule

配置锁相环

按照如下方式配置锁相环：

仅使用clk0，其余不用配置

配置ROM模块

配置文件

将正弦波在一个周期内的数据记录为.mif格式

-- Copyright (C) 2018  Intel Corporation. All rights reserved.
-- Your use of Intel Corporation's design tools, logic functions 
-- and other software and tools, and its AMPP partner logic 
-- functions, and any output files from any of the foregoing 
-- (including device programming or simulation files), and any 
-- associated documentation or information are expressly subject 
-- to the terms and conditions of the Intel Program License 
-- Subscription Agreement, the Intel Quartus Prime License Agreement,
-- the Intel FPGA IP License Agreement, or other applicable license
-- agreement, including, without limitation, that your use is for
-- the sole purpose of programming logic devices manufactured by
-- Intel and sold by Intel or its authorized distributors.  Please
-- refer to the applicable agreement for further details.-- Quartus Prime generated Memory Initialization File (.mif)WIDTH=8;
DEPTH=1024;ADDRESS_RADIX=UNS;
DATA_RADIX=HEX;CONTENT BEGIN[0..2]  :   7F;[3..7]  :   80;[8..12]  :   81;[13..17]  :   82;[18..23]  :   83;[24..28]  :   84;[29..33]  :   85;[34..38]  :   86;[39..43]  :   87;[44..48]  :   88;[49..53]  :   89;[54..58]  :   8A;[59..64]  :   8B;[65..69]  :   8C;[70..74]  :   8D;[75..79]  :   8E;[80..84]  :   8F;[85..89]  :   90;[90..94]  :   91;[95..100]  :   92;[101..105]  :   93;[106..110]  :   94;[111..115]  :   95;[116..120]  :   96;[121..126]  :   97;[127..131]  :   98;[132..136]  :   99;[137..141]  :   9A;[142..146]  :   9B;[147..152]  :   9C;[153..157]  :   9D;[158..162]  :   9E;[163..168]  :   9F;[169..173]  :   A0;[174..178]  :   A1;[179..183]  :   A2;[184..189]  :   A3;[190..194]  :   A4;[195..199]  :   A5;[200..205]  :   A6;[206..210]  :   A7;[211..216]  :   A8;[217..221]  :   A9;[222..226]  :   AA;[227..232]  :   AB;[233..237]  :   AC;[238..243]  :   AD;[244..248]  :   AE;[249..254]  :   AF;[255..259]  :   B0;[260..265]  :   B1;[266..271]  :   B2;[272..276]  :   B3;[277..282]  :   B4;[283..287]  :   B5;[288..293]  :   B6;[294..299]  :   B7;[300..304]  :   B8;[305..310]  :   B9;[311..316]  :   BA;[317..322]  :   BB;[323..328]  :   BC;[329..333]  :   BD;[334..339]  :   BE;[340..345]  :   BF;[346..351]  :   C0;[352..357]  :   C1;[358..363]  :   C2;[364..369]  :   C3;[370..375]  :   C4;[376..381]  :   C5;[382..388]  :   C6;[389..394]  :   C7;[395..400]  :   C8;[401..406]  :   C9;[407..413]  :   CA;[414..419]  :   CB;[420..425]  :   CC;[426..432]  :   CD;[433..438]  :   CE;[439..445]  :   CF;[446..452]  :   D0;[453..458]  :   D1;[459..465]  :   D2;[466..472]  :   D3;[473..479]  :   D4;[480..486]  :   D5;[487..493]  :   D6;[494..500]  :   D7;[501..507]  :   D8;[508..514]  :   D9;[515..521]  :   DA;[522..529]  :   DB;[530..536]  :   DC;[537..544]  :   DD;[545..551]  :   DE;[552..559]  :   DF;[560..567]  :   E0;[568..575]  :   E1;[576..583]  :   E2;[584..591]  :   E3;[592..600]  :   E4;[601..608]  :   E5;[609..617]  :   E6;[618..626]  :   E7;[627..635]  :   E8;[636..644]  :   E9;[645..653]  :   EA;[654..663]  :   EB;[664..673]  :   EC;[674..683]  :   ED;[684..693]  :   EE;[694..704]  :   EF;[705..715]  :   F0;[716..727]  :   F1;[728..738]  :   F2;[739..751]  :   F3;[752..764]  :   F4;[765..777]  :   F5;[778..791]  :   F6;[792..806]  :   F7;[807..823]  :   F8;[824..840]  :   F9;[841..860]  :   FA;[861..882]  :   FB;[883..908]  :   FC;[909..942]  :   FD;[943..1023]  :   FE;
END;