参考文献
[1] 陈光东. 单片微型计算机原理与接口技术. 武汉：华中理工大学出版社.1999 [2] 袁启昌. 单片机原理及应用教程. 北京：科学出版社. 2005.3
[3] 江志红. 51单片机技术与应用系统开发案例精选. 北京: 清华大学出版社.2008.12 [4] 周润景. 单片机电路设计、分析与制作. 北京： 机械工业出版社. 2010.8 [5] 赵建领. 51单片机开发与应用技术详解.北京： 电子工业出版社..2009.1 [6] 谭浩强.C程序设计.北京：清华大学出版社.2005
[7] 李银华.电子线路设计指导.北京航空航天大学出版社.2005年6月 [8] 康华光.电子技术基础.高教出版社.2003 [9] 其他互联网资源
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附录1 总的电路图
附 录
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附录2 主要元器件清单 元器件名称 单片机 D/A转换器 运算放大器 显示器 三端稳压集成器 型号与规格 AT89S52 DAC0832 NE4558 LCD1602 7805 IN4007 数量 1 1 1 1 1 4 作用 主控电路 数模转换电路 信号放大电路 波形显示电路 三端稳压集成电路 整流桥
整流电路 23
附录3 程序清单
#include
#define uchar unsigned char #define uint unsigned int sbit lcdrw=P3^3; sbit lcdrs=P3^2; sbit lcde=P3^4; sbit d=P2^7; sbit s1=P2^0; sbit s2=P2^1; sbit s3=P2^2; sbit cs=P3^5; sbit wr=P3^6;
uchar s1num,a,ys,j; uint fre;
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--)
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for(j=110;j>0;j--); }
void delay1(uint y) {
uint i;
for(i=y;i>0;i--); }
void write_com(uchar com) //1602写指令 {
lcdrs=0; P1=com; delay(5); lcde=1; delay(5); lcde=0; }
void write_data(uchar date) //1602数据 {
lcdrs=1; P1=date; delay(5); lcde=1; delay(5); lcde=0; }
void init() //初始化 {
lcdrw=0; lcde=0; wr=0; cs=0;
write_com(0x38); write_com(0x0c); write_com(0x06); write_com(0x01);
write_com(0x80+0x00);
write_data(0x77); //写wave: write_data(0x61); write_data(0x76); write_data(0x65); write_data(0x3a);
write_com(0x80+0x40); //写 f：
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