基于AT89C51和DAC0832、LM324的波形发生器能发生正弦,方波,三角波,锯齿波四种波形用C语言编写,

基于AT89C51和DAC0832、LM324的波形发生器能发生正弦,方波,三角波,锯齿波四种波形用C语言编写,
基于AT89C51和DAC0832、LM324的波形发生器能发生正弦,方波,三角波,锯齿波四种波形用C语言编写,

基于AT89C51和DAC0832、LM324的波形发生器能发生正弦,方波,三角波,锯齿波四种波形用C语言编写,

#include<reg52.h>

#define uchar unsigned char

#define uint unsigned int

sbit lcdrs=P3^2;

sbit lcdrw=P3^3;

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 slnum,a,ys,j;

uint fre;

void delay(uint z)

{

   uint 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--); 

}

uchar code tosin[256]=

{

0x80,0x82,0x85,0x88,0x8b,0x8e,0x91,0x94,0x97,0x9a,0x9d,0xa0,0xa3,0xa6,

0xa9,0xac,0xaf,0xb2,0xb6,0xb9,0xbc,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

};

void write_com(uchar com)

{

   lcdrs=0;

   P1=com;

   delay(5);

   lcde=1;

   delay(5);

   lcde=0;

}

void write_data(uchar date)

{

   lcdrs=1;

   P1=date;

   delay(5);

   lcde=1;

   delay(5);

   lcde=0;

}

void init()

{

  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_data(0x80+0x40);  //写f  

  write_data(0x66);

  write_data(0x3a);

}

void write_f(uint date) //写频率

{

   uchar qian,bai,shi,ge;

   qian=date/1000;

   bai=date/100%10;

   shi=date/10%10;

   ge=date%10;

   write_com(0x80+0x42);

   write_data(0x30+qian);

   write_data(0x30+bai);

   write_data(0x30+shi);

   write_data(0x30+ge);

   write_data(0x48);

   write_data(0x5a);

}

void xsf()   //显示频率

{

  if(slnum==1)

  {

     fre=(1000/(9+3*ys));

 write_f(fre);

  }

  if(slnum==2)

  {

     fre=(100000/(3*ys));

 write_f(fre);

  }

   if(slnum==3)

  {

     fre=(1000/(15+3*ys));

 write_f(fre);

  }

}

void keyscanf()

{

   d=0;

   if(s1==0)

   {

      delay(5);

  if(s1==0)

  {

     while(!s1);

 slnum++;

 if(slnum==1)

 {

    ys=0;

write_com(0x80+0x05);

write_data(0x73);   //写sine:

write_data(0x69);

write_data(0x6e);

write_data(0x65);

write_data(0x20);

write_data(0x20);

 }

 if(slnum==2)

 {

    ys=10;

write_com(0x80+0x05);

write_data(0x73);   //写squrae

write_data(0x71);

write_data(0x75);

write_data(0x61);

write_data(0x72);

write_data(0x65);

 }

 if(slnum==3)

 {

    ys=0;

write_com(0x80+0x05);   //写train

write_data(0x74);

write_data(0x72);

write_data(0x61);

write_data(0x69);

write_data(0x6e);

write_data(0x20);

 }

 if(slnum==4)

 {

    slnum=0;

P1=0;

write_com(0x80+0x05);

write_data(0x20);

write_data(0x20);

write_data(0x20);

write_data(0x20);

write_data(0x20);

write_data(0x20);

write_com(0x80+0x42);

write_data(0x20);

write_data(0x20);

write_data(0x20);

write_data(0x20);

write_data(0x20);

write_data(0x20);

 }

  }

   }

   if(s2==0)

   {

      delay(5);

  if(s2==0)

  {

    while(!s2);

ys++;

  }

   }

   if(s3==0)

   {

      delay(5);

  if(s3==0)

  {

    while(!s3);

ys--;

  }

   }

}

void main()

{

   init();

   while(1)

   {

      keyscanf();

  if(slnum==1)//正弦波//

  {

     for(j=0;j<255;j++)

 {

    P0=tosin[j];

delay(ys);

 }

  }

  if(slnum==2)  //方波//

  {

     P0=0xff;

 delay1(ys);

 P0=0;

 delay1(ys);

  }

  if(slnum==3)  //三角波//

  {

     if(a<128)

 {

    P0=a;

delay1(ys);

 }

 else

 {

    P0=255-a;

delay1(ys);

 }

 a++;

  }

  if(!(s1&s2&s3))

  {

     xsf();

  }

   }

}