创新性实验研究报告实验项目名称＿简易函数信号发生器四、实验内容2、实验内容1、运用keil软件对程序进行编写，运行程序，并进行程序修改。
2、运用protues软件进行硬件电路仿真设计。
3、将程序下载到仿真单片机中，并观测输出波形。
4、对程序进行修改，再次运行仿真软件，直到输出理想的波形。
5、仿照仿真软件进行硬件电路的焊接。
6、将程序下载到单片机，并用示波器测试输出波形。
7、对程序进行修改，直到输出满意的波形为止。
3、实验步骤1、首先打开keil软件.2、运用keil软件对程序进行编写，程序见附件。
3、打开protues软件.4、运用protues软件对硬件电路进行设计。
9C51单片机是该信号发生器的核心，具有2个定时器，32个并行I/O口，1个串行I/O口，5个中断源。
由于本设计功能简单，数据处理容易，数据存储空间也足够，因为我们采用了片选法选择芯片，进行芯片的选择和地址的译码。
在单片机最小最小系统中，单片机从P1口接收来自键盘的信号，并通过P0口输出控制信号，通过DA转换芯片最终由示波器显示输出波形。
单片机引脚分配如下：�XTAL1，XTAL2：外接晶振，产生时钟信号。
�RST：复位电路；�P2口：8位数字信号输出输出，外接DAC0832；�P3.6口和P3.7口：DAC0832的时钟信号；单片机模块单片机输出的是数字信号，因为要得到模拟信号的波形就必须对其进行数模转换。
我们采用了DAC0832数模转换器，该芯片具由8位输入锁存器、8位DAC寄存器、8位D/A转换器及转换控制电路四部分构成。
由于其输出为电流输出，因为外加运算放大器LM324使之转换为电压输出。
最后通过示波器显示输出的波形。
数模转换模块运放模块整体硬件电路图山东科技大学电工电子实验教学中心创新性实验研究报告五、实验结果与分析1、实验现象、数据记录仿真波形2、对实验现象、数据及观察结果的分析与讨论：经过观察调试，再观察，再调试，最终输出的波形较为理想。
此次试验经过一系列的调试，最终输出的波形为正弦波、方波、三角波。
刚开始在给运放接电源时，接的电源不是稳恒直流电源（用示波器测试了一下电源的输出波形，虽然电源上写的是直流稳恒电源，但是发现他的波形掺杂有杂波），所以测出来的波形不是正弦波、方波和三角波。
分析原因可能与运放的电源有关，所以在实验室找到了数控稳恒直流电源，经过给运放供电，发现输出了正弦波、方波、三角波。
所以给运放供电的电源必须是经滤波后的平稳电源，否则对运放有很大影响。
3、关键点：此次试验关键点是程序的编写，在程序编写的过程中请教了众多的编程高手，最终在大家的帮助下编写出了能输出正弦波、方波、三角波的程序。
此次试验另一个关键点是硬件电路的焊接。
在硬件电路焊接中首先应根据仿真软件进行焊接，当焊完以后还要对电路进行测试，以防止电路不通。
第三个关键点是在给运放供电时的电源一定要是稳恒直流电源，不能掺杂有杂波。
六、实验结论基于单片机的信号发生器设计，这个信号发生器的设计中涉及到一个典型的控制过程。
通过单片机控制一个模数转换器DAC0832产生所需要的电流，然后使用运算放大器LM324可以将其电流输出线性地转换成电压输出，再将电压经过运算放大器的放大，可以得到足够幅度的信号。
通过程序的控制，可以产生一系列有规律的波形。
这样一个信号发生装置在控制领域有相当广泛的应用范围。
最终做出来的信号发生器满足了题目中的所有要求：产生三种波形。
正弦波、三角波、矩形波。
当然还是存在不足的地方，比如不能实现频率的按一个小的步进调整。
并且当频率太小时矩形波会有些失真。
信号发生器可以生成更多的波形，只需要再加些波形表即可。
七、指导老师评语及得分：签名：年月日附件：源程序等。
正弦波程序：#include <reg51.h>#define uchar unsigned char#define uint unsigned intsbit cs=P3^7;sbit wr=P3^6;uchar j;uint ys,a=0;山东科技大学电工电子实验教学中心创新性实验研究报告uchar code tosin[256]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,0xbf,0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xef,0xf1,0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf2,0xf1,0xef,0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xde,0xdd,0xda,0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,0xc5,0xc2,0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80,0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16,0x15,0x13,0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,0x0e,0x10,0x11,0x13,0x15,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e,0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66 ,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80 };/*正弦波码*/void delay(uint z) //延时子程序{uchar i,j;for(i=z;i>0;i--)for(j=110;j>0;j--);}void delay1(uint y){uint i;for(i=y;i>0;i--);}void main(){cs=1;wr=1;cs=0;山东科技大学电工电子实验教学中心创新性实验研究报告wr=0;while(1) //正弦波{P2=tosin[j];j++;delay(1);}wr=1;cs=1;}方波程序：#include <reg51.h>#define uchar unsigned char#define uint unsigned intsbit cs=P3^7;sbit wr=P3^6;uchar j;uint ys,a=0;uchar code tosin[256]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,0xbf,0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xef,0xf1,0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf2,0xf1,0xef,0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xde,0xdd,0xda,0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,0xc5,0xc2,0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80,0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16,0x15,0x13,0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,0x0e,0x10,0x11,0x13,0x15,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e,0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66 ,0x69,0x6c,0x6f,0x72,山东科技大学电工电子实验教学中心创新性实验研究报告0x76,0x79,0x7c,0x80 };/*正弦波码*/void delay(uint z) //延时子程序{uchar i,j;for(i=z;i>0;i--)for(j=110;j>0;j--);}void delay1(uint y){uint i;for(i=y;i>0;i--);}void main(){cs=1;wr=1;cs=0;wr=0;while(1) //方波{P2=0xff;delay(1);P2=0;delay(1);}wr=1;cs=1;}三角波程序：#include <reg51.h>#define uchar unsigned char#define uint unsigned intsbit cs=P3^7;sbit wr=P3^6;uchar j;uint ys,a=0;uchar code tosin[256]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,0xbf,0xc2,0xc5,山东科技大学电工电子实验教学中心创新性实验研究报告0xc7,0xca,0xcc,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xef,0xf1,0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf2,0xf1,0xef,0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xde,0xdd,0xda,0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,0xc5,0xc2,0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80,0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16,0x15,0x13,0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,0x0e,0x10,0x11,0x13,0x15,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e,0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66 ,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80 };/*正弦波码*/void delay(uint z) //延时子程序{uchar i,j;for(i=z;i>0;i--)for(j=110;j>0;j--);}void delay1(uint y){uint i;for(i=y;i>0;i--);}void main(){cs=1;wr=1;cs=0;wr=0;while(1) //三角波{山东科技大学电工电子实验教学中心创新性实验研究报告if(a<128){P2=a;delay(10);}else{P2=255-a;delay(10);}a++;if(a==255){a=0;}}wr=1;cs=1;}。