20Hz~20KHz频率可调三种波形信号发生器
仿真原理图如下（proteus仿真工程文件可到本帖附件中下载）
单片机源程序如下:
- #include <reg51.h>
- #include <intrins.h>
- #include<ABSACC.H>
- #define uchar unsigned char
- #define data_OUT XBYTE[0x7FFF]
- char code dat[]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8
- ,0xab,0xae,0xb1,0xb4,0xb7,0xbc,0xbf,0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,
- 0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xf1,
- 0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,
- 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,
- 0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf3,0xf2,0xf1,0xef,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,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,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};
- bit flag=0;
- void delay(unsigned int N)
- {
- int i;
- for(i=0;i<N;i++);
- }
- void conversion_once_0832(unsigned char out_data)
- {
- data_OUT=out_data; //输出数据
- delay(10); //延时等待转换
- }
- uchar keyscan()
- {
- uchar key;
- if(P1!=0xff)
- {
- delay(61);
- key=P1;
- if(key!=0xff)
- flag=~flag;
- return(key);
- }
- }
- void triangle()
- {
- uchar k;
- for(k=0;k<255;k++)
- conversion_once_0832(k);
- for(;k>0;k--)
- conversion_once_0832(k);
- }
- void pulse()
- {
- conversion_once_0832(0xff);
- delay(1000);
- conversion_once_0832(0x00);
- delay(1000);
- }
- void fun3()
- {
- uchar j;
- for(j=0;j<255;j++)
- conversion_once_0832(j);
- }
- void fun4()
- {
- uchar i;
- for(i=0;i<255;i++)
- {
- conversion_once_0832(dat[i]);
- }
- }
- void main()
- {
- uchar temp;
- while(1)
- {
- temp=keyscan();
- switch(temp)
- {
- case 0xfe:
- do{
- triangle();
- }while(keyscan()&&(flag==1));break;
- case 0xfd: do{
- pulse();
- }while(keyscan()&&(flag==1));break;
- case 0xfb: do{
- fun3();
- }while(keyscan()&&(flag==1));break;
- case 0xf7: do{
- fun4();
- }while(keyscan()&&(flag==1));break;
- default: break;
- }
- }
-
- }
-
所有资料51hei提供下载:
波形发生器.zip
(715 KB, 下载次数: 96)
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