Vivado-IP-DDS and Testbench Learning

devtools/2024/11/6 21:29:18/

DDS内部结构

实现流程

首先新建一个工程，创建bd文件，添加DDS Compiler核，此处不多赘述

Block Design

在观测输出的信号时，需要将最高位符号位的信号取反，这样才能输出正弦波，否则输出的波形如下图所示

将tvalid信号取反是因为将这个信号接到了开发板的LED0上，led需要低电平才能点亮，因此将vld信号进行取反

Testbench

bd文件转化成的Verilog文件如下

//Copyright 1986-2018 Xilinx, Inc. All Rights Reserved.
//--------------------------------------------------------------------------------
//Tool Version: Vivado v.2018.3 (win64) Build 2405991 Thu Dec  6 23:38:27 MST 2018
//Date        : Tue Apr 23 18:35:43 2024
//Host        : MOERJIE_PC running 64-bit major release  (build 9200)
//Command     : generate_target top_wrapper.bd
//Design      : top_wrapper
//Purpose     : IP block netlist
//--------------------------------------------------------------------------------
`timescale 1 ps / 1 psmodule top_wrapper(Res_0,aclk_0,wave_out_0);output [0:0]Res_0;input aclk_0;output [15:0]wave_out_0;wire [0:0]Res_0;wire aclk_0;wire [15:0]wave_out_0;top top_i(.Res_0(Res_0),.aclk_0(aclk_0),.wave_out_0(wave_out_0));
endmodule

针对顶层模块的输入输出设计如下testbench文件

`timescale 1ns / 1ps
//
// Company: 
// Engineer: Sawen Moerjie 
// 
// Create Date: 2024/04/23 13:51:29
// Design Name: 
// Module Name: top_tb
// Project Name: 
// Target Devices: 
// Tool Versions: 
// Description: 
// 
// Dependencies: 
// 
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
// 
//module top_tb();reg aclk;//wire [15:0] M_AXIS_DATA_0_tdata;wire Res_0;wire [15:0] wave_out;initial beginaclk=1'b0;end always #5 aclk=~aclk;top_wrapper top_wrapper_u0(.aclk_0                 (aclk),.Res_0   (Res_0),.wave_out_0             (wave_out));endmodule