Verilog期末实验报告—波形发生器

Verilog期末实验报告—波形发生器 深 圳 大 学 实 验 报 告 课程名称: Verilog使用及其应用 实验名称: 频率可变的任意波形发生器 学院: 电子科学与技术学院 专业:电子科学与技术 班级: 2 组号: 指导教师: 刘春平 报告人: 陈昊 学号: 2007160162 实验地点 科技楼B115 the three. Third, seriously implement the Central, provincial, municipal and County party Committee on the establishment of a sound work style construction views of the long-acting mechanism and on the implementation of the three Suns calls for further strengthening of education administration and supervision of party members and cadres, from the ... Accept supervision and earnestly grasp, balance, two promotion, important job himself, the Secretary of development, major issues personally. 5. strongly supports accountability discipline discipline. Administrative provisions on strict enforcement of party members and cadres to ask all the discipline inspection and supervision cadres in accordance with the iron itself must be a hard requirement, adhere to the responsibilities and play, earnestly fulfill their duties of supervision and accountability for Zhi JI. Zhen into full play and the oversight role of the Commission, establish and improve the village rules and community conventions, promoting joint public and serving the sunshine publicly available implementation of the platform for action. Discipline in handling cases, adhere to find along with scrutiny, to appoint the interference and resistance, backed by courageous, find the problem corrected, powerful maintenance the seriousness of responsibility of uncorrupted. Actively promote the discipline Committee detailed switch and, casting, tree-generating activities. Promote 一、实验目的 应用Verilog进行编写四种波形发生的程序，并结合DE2板与DVCC实验板上的D/A转换器在示波器显示出波形。初步了解Verilog的编程及DE2板的应用，加强对其的实际应用操作能力。 二、实验原理 实验程序分为三部分: 第一、 通过计数器实现内置信号分频，并通过外置开关调节频率来控制输出波形的频率。 第二、 设定ROM中的数值，将波形数据存储到ROM中。 第三、 设定波形选择开关。 总体设计及其原理说明: FPGA 图 1-1 系统总体设计方案 DDS是一种把数字信号通过数/模转换器转换成模拟信号的合成技术。它由相位累加器、相幅转换函数、D/A转换器以及内部时序控制产生器等电路组成。 参考频率f_clk为整个合成器的工作频率,输入的频率字保存在频率寄存器中,经,位相位累加器,累加一次,相位步进增加,经过内部ROM波形表得到相应的幅度值,经过D/A转换和低通滤波器得到合成的波形。p为频率字,即相位增量;参考频率为,_clk;相位累加器的长度为,位,输出频率,_out为: f_out——输出信号的频率; N————相位累加器的位数; p———频率控制字(步长); f_clk——基准时钟频率。 the three. Third, seriously implement the Central, provincial, municipal and County party Committee on the establishment of a sound work style construction views of the long-acting mechanism and on the implementation of the three Suns calls for further strengthening of education administration and supervision of party members and cadres, from the ... Accept supervision and earnestly grasp, balance, two promotion, important job himself, the Secretary of development, major issues personally. 5. strongly supports accountability discipline discipline. Administrative provisions on strict enforcement of party members and cadres to ask all the discipline inspection and supervision cadres in accordance with the iron itself must be a hard requirement, adhere to the responsibilities and play, earnestly fulfill their duties of supervision and accountability for Zhi JI. Zhen into full play and the oversight role of the Commission, establish and improve the village rules and community conventions, promoting joint public and serving the sunshine publicly available implementation of the platform for action. Discipline in handling cases, adhere to find along with scrutiny, to appoint the interference and resistance, backed by courageous, find the problem corrected, powerful maintenance the seriousness of responsibility of uncorrupted. Actively promote the discipline Committee detailed switch and, casting, tree-generating activities. Promote 图1-2 四种波形单周期的取样示意图 段地址 基地址 D7 D6 D5 D4 D3 D2 D1 D0 00 000 10 00 001 17 00 010 15 00 011 17 00 100 10 00 101 3 00 110 5 00 111 3 01 000 3 01 001 3 01 010 3 01 011 3 01 100 1 01 101 1 01 110 1 01 111 1 10 000 0 10 001 5 10 010 10 10 011 15 10 100 20 10 101 25 10 110 30 10 111 35 11 000 35 11 001 30 11 010 25 11 011 20 11 100 15 11 101 10 11 110 5 11 111 0 图1-3 函数查找表的设计 the three. Third, seriously implement the Central, provincial, municipal and County party Committee on the establishment of a sound work style construction views of the long-acting mechanism and on the implementation of the three Suns calls for further strengthening of education administration and supervision of party members and cadres, from the ... Accept supervision and earnestly grasp, balance, two promotion, important job himself, the Secretary of development, major issues personally. 5. strongly supports accountability discipline discipline. Administrative provisions on strict enforcement of party members and cadres to ask all the discipline inspection and supervision cadres in accordance with the iron itself must be a hard requirement, adhere to the responsibilities and play, earnestly fulfill their duties of supervision and accountability for Zhi JI. Zhen into full play and the oversight role of the Commission, establish and improve the village rules and community conventions, promoting joint public and serving the sunshine publicly available implementation of the platform for action. Discipline in handling cases, adhere to find along with scrutiny, to appoint the interference and resistance, backed by courageous, find the problem corrected, powerful maintenance the seriousness of responsibility of uncorrupted. Actively promote the discipline Committee detailed switch and, casting, tree-generating activities. Promote 三、实验内容 程序编码: module dds(f_clk,p,choose,data);//端口设定 input [5:0] p; //频率控制字 input[1:0] choose; //波形选择 input f_clk; //内置晶振 output [7:0] data; wire [7:0]data; reg [5:0] addr,address; reg [5:0] i; reg f_out; initial begin i<=0; addr<=0; f_out<=0; end always @(posedge f_clk) //利用计数器实现任意分频 begin if(i==p) //设定频率控制字p begin i=0; f_out=~f_out; end else i=i+1; end function [7:0] romout; //ROM的设定 input[5:0] address; case(address) //各波形初值的预装入 0 : romout = 10; //正弦波初值 1 : romout = 17; 2 : romout = 15; 3 : romout = 17; 4 : romout = 10; 5 : romout = 3; 6 : romout = 5; 7 : romout = 3; 8 : romout = 3; //方波初值 9 : romout = 3; 10: romout = 3; the three. Third, seriously implement the Central, provincial, municipal and County party Committee on the establishment of a sound work style construction views of the long-acting mechanism and on the implementation of the three Suns calls for further strengthening of education administration and supervision of party members and cadres, from the ... Accept supervision and earnestly grasp, balance, two promotion, important job himself, the Secretary of development, major issues personally. 5. strongly supports accountability discipline discipline. Administrative provisions on strict enforcement of party members and cadres to ask all the discipline inspection and supervision cadres in accordance with the iron itself must be a hard requirement, adhere to the responsibilities and play, earnestly fulfill their duties of supervision and accountability for Zhi JI. Zhen into full play and the oversight role of the Commission, establish and improve the village rules and community conventions, promoting joint public and serving the sunshine publicly available implementation of the platform for action. Discipline in handling cases, adhere to find along with scrutiny, to appoint the interference and resistance, backed by courageous, find the problem corrected, powerful maintenance the seriousness of responsibility of uncorrupted. Actively promote the discipline Committee detailed switch and, casting, tree-generating activities. Promote 11: romout = 3; 12: romout = 1; 13: romout = 1; 14: romout = 1; 15: romout = 1; 16 : romout = 0; //正三角波初值 17 : romout = 5; 18 : romout = 10; 19 : romout = 15; 20 : romout = 20; 21 : romout = 25; 22 : romout = 30; 23 : romout = 35; 24 : romout = 35; //反三角波初值 25 : romout = 30; 26 : romout = 25; 27 : romout = 20; 28 : romout = 15; 29 : romout = 10; 30 : romout = 5; 31 : romout = 0; default : romout = 10'hxx; endcase endfunction always@(posedge f_out) begin if(addr==8) //波形数据切换 addr=0; else addr=addr+1; case(choose) //波形选择开关设定 0: address=addr; 1: address=addr+8; 2: address=addr+16; 3: address=addr+24; endcase end assign data = romout(address);//将ROM中对应数据传递输出端口data输出 endmodule the three. Third, seriously implement the Central, provincial, municipal and County party Committee on the establishment of a sound work style construction views of the long-acting mechanism and on the implementation of the three Suns calls for further strengthening of education administration and supervision of party members and cadres, from the ... Accept supervision and earnestly grasp, balance, two promotion, important job himself, the Secretary of development, major issues personally. 5. strongly supports accountability discipline discipline. Administrative provisions on strict enforcement of party members and cadres to ask all the discipline inspection and supervision cadres in accordance with the iron itself must be a hard requirement, adhere to the responsibilities and play, earnestly fulfill their duties of supervision and accountability for Zhi JI. Zhen into full play and the oversight role of the Commission, establish and improve the village rules and community conventions, promoting joint public and serving the sunshine publicly available implementation of the platform for action. Discipline in handling cases, adhere to find along with scrutiny, to appoint the interference and resistance, backed by courageous, find the problem corrected, powerful maintenance the seriousness of responsibility of uncorrupted. Actively promote the discipline Committee detailed switch and, casting, tree-generating activities. Promote 四、实验截图 1.正弦波示意图:(choose=0时的波形数值) 2.方波示意图:(choose=1时的波形数值) 3.正三角波示意图:(choose=2时的波形数值) 4.反三角波示意图:(choose=3时的波形数值) the three. Third, seriously implement the Central, provincial, municipal and County party Committee on the establishment of a sound work style construction views of the long-acting mechanism and on the implementation of the three Suns calls for further strengthening of education administration and supervision of party members and cadres, from the ... Accept supervision and earnestly grasp, balance, two promotion, important job himself, the Secretary of development, major issues personally. 5. strongly supports accountability discipline discipline. Administrative provisions on strict enforcement of party members and cadres to ask all the discipline inspection and supervision cadres in accordance with the iron itself must be a hard requirement, adhere to the responsibilities and play, earnestly fulfill their duties of supervision and accountability for Zhi JI. Zhen into full play and the oversight role of the Commission, establish and improve the village rules and community conventions, promoting joint public and serving the sunshine publicly available implementation of the platform for action. Discipline in handling cases, adhere to find along with scrutiny, to appoint the interference and resistance, backed by courageous, find the problem corrected, powerful maintenance the seriousness of responsibility of uncorrupted. Actively promote the discipline Committee detailed switch and, casting, tree-generating activities. Promote 五、实验 通过这次期末实验，更进一步认识了Verilog语言的使用，详细了解了整个设计制作和仿真，独立思考并通过一步步的调试，逐步摸索和进一步优化程序最终完成实验，锻炼了逻辑思维能力。实验综合性较强，在实验中涉及了本学期多个知识点: ?always语句;?initial语句;?if—else语句;?case语句;?传递函数assign;?function说明语句。 在测试和调整程序时发现一些容易犯错的问题: 第一、 用case语句取代了定义ROM造成了数据开始并没有固化在ROM中而是从程序中写入 再读出。(解决办法:用function语句对ROM进行定义并装初值) 第二、 应该注意传递函数中的输出端口应该是wire型的，如果定义为reg将会出错。 第三、 开始时波形数据按照图放入初值时，有负数、小数等，当装入负数小数后在仿真中 无法正确显示数字。(解决办法:将波形平移扩大将小数和负数换算成整数装入即可 显示波形数据) 第四、 关键的问题是怎样实现寻址的操作，首先是定义一个从0—7的循环加法计数器作为 段内基地址寻址，然后通过case语句choose波形选择相应波段的段地址。 个人觉得这样的实验比较贴近学习和工作，通过自己动手更加能够充分掌握所学知识 点，将本和实际结合起来，希望以后可以开展更多这样的实验。 the three. Third, seriously implement the Central, provincial, municipal and County party Committee on the establishment of a sound work style construction views of the long-acting mechanism and on the implementation of the three Suns calls for further strengthening of education administration and supervision of party members and cadres, from the ... Accept supervision and earnestly grasp, balance, two promotion, important job himself, the Secretary of development, major issues personally. 5. strongly supports accountability discipline discipline. Administrative provisions on strict enforcement of party members and cadres to ask all the discipline inspection and supervision cadres in accordance with the iron itself must be a hard requirement, adhere to the responsibilities and play, earnestly fulfill their duties of supervision and accountability for Zhi JI. Zhen into full play and the oversight role of the Commission, establish and improve the village rules and community conventions, promoting joint public and serving the sunshine publicly available implementation of the platform for action. Discipline in handling cases, adhere to find along with scrutiny, to appoint the interference and resistance, backed by courageous, find the problem corrected, powerful maintenance the seriousness of responsibility of uncorrupted. Actively promote the discipline Committee detailed switch and, casting, tree-generating activities. Promote