信号源(正弦波,三角波,锯齿波,方波,步进10HZ,0.1V).doc

信号源（正弦波，三角波，锯齿波，方波，步进10HZ,0.1V）  
2009-08-27 19:14:00|  分类： 默认分类|字号 订阅
#include <reg52.h> 
#define uchar unsigned char 
#define uint unsigned int 
#define DAC1 P0
#define DAC2 P2
sbit rs=P3^0; 
sbit rw=P3^1; 
sbit en=P3^2; 
sbit k1=P3^3;
sbit k2=P3^4;
sbit k3=P3^5;
sbit k4=P3^6;
uchar mm,gao,di,temp,k1num,k2num,num,Anum,Fnum; 
uchar bai,shi,ge,Fbai,Fshi,Fge,date2,Ashi,Age;
uchar code tbsin[]=
{128,144,160,175,190,203,216,227,236,244,250,254,255,255,254,250,244,236,
227,216,203,190,175,160,144,128,112,96,81,66,53,40,29,20,12,6,2,0,0,2,6,12,
20,29,40,53,66,81,96,112}; 
uchar code tbsanjiao[]=
{0,10.625,21.25,31.875,42.5,53.125,63.75,74.375,85,95.625,106.25,
116.875,127.5,138.125,148.75,159.375,170,180.625,191.25,201.875,212.5
,223.125,233.75,244.375,255,255,244.375,233.75,223.125,212.5,201.875,
191.25,180.625,170,159.375,148.75,138.125,127.5,116.875,106.25,95.625,85,
74.375,63.75,53.125,42.5,31.875,21.25,10.625,0,};
uchar code tbjuchi[]=
{0,5,10,16,21,26,31,36,42,47,52,57,62,68,73,78,83,88,94,99,104,109,115,120,125,
130,135,141,146,151,156,161,167,172,177,182,187,193,198,203,208,213,219,224,229,
234,239,245,250,255,};
uchar code tbfangbo[]=
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255};
uchar code tbDAC2[]=
{1,5,10,16,21,26,31,36,42,47,52,57,62,68,73,78,83,88,94,99,104,109,115,120,125,
130,135,141,146,151,156,161,167,172,177,182,187,193,198,203,208,213,219,224,229,
234,239,245,250,255,};
uchar code tbF[]=
{56,74,89,102,113,123,131,138,145,151,156,161,165,169,173,176,179,182,185,187,189,
191,194,195,197,199,200,202,203,205,206,207,208,209,211,212,213,213,214,215,216};
void delay(uint z)//延时 
{
   uint x,y;
   for(x=z;x>0;x--)
      for(y=110;y>0;y--);
}
void write_com(uchar com)//LCD写命令
{
 rs=0;
    rw=0;
    en=0;
    P1=com;
    delay(2);
    en=1;
    delay(2);
    en=0;

}
void write_date( uchar date)//LCD写数据
{
 rs=1;
    rw=0;
    en=0;
    P1=date;
    delay(2);
    en=1;
    delay(2);
    en=0;
}
void lcd_wr_str(uchar i,uchar *date)//写一个字符串
{
 if(i==0)
 {
  write_com(0x80);
  while(*date!='\0')
   {
      write_date(*date);
   date++;
   delay(5);
   }
 }
 if(i==1)
 {
   write_com(0x80+0x40);
  while(*date!='\0')
  {
   write_date(*date);
   date++;
   delay(5); 
  }
 } 
}
void init()//初始化
{    
 TMOD=0x02;
    TH0=56;
    TL0=56;
    EA=1;
    ET0=1;
    TR0=1;
   en=0;
 write_com(0x38);
 write_com(0x06);
 write_com(0x0f);
    write_com(0x0c);
 write_com(0x80);
    write_com(0x01);
    write_com(0x80+5); 
    delay(5);
    lcd_wr_str(0,"    Press K1");
    lcd_wr_str(1," Chose One Wave");

}
void timer0() interrupt 1//中断
{  
 switch (k1num)
 {   case 1:{num++;if(num==50)num=0;DAC1=tbsin[num]; }break;//正弦波
  case 2:{num++;if(num==50)num=0;DAC1=tbsanjiao[num];}break;//三角波
  case 3:{num++;if(num==50)num=0;DAC1=tbjuchi[num]; }break;//锯齿波
  case 4:{num++;if(num==50)num=0;DAC1=tbfangbo[num]; }break;//方波
 }
}
void sel_wave(void)
{
   if(k1==0)//选择波形
 {  
  TR0=0;
  delay(5);
  if(k1==0)
  {
   while(!k1);
   delay(5);
   k1num++;
   if(k1num==5)
   {
    k1num=0;
   }
     }
 }
 TR0=1;
}
void sel_FV()//选择调幅 调频 
{   TR0=0;
 if(k2==0)
 {
  delay(10);
  if(k2==0)
  { while(k2==0);
   k2num++;
   if(k2num==3)k2num=0;

  }
 }
   TR0=1;
}
void keyadd()
{
 if(k3==0)
 {
  delay(10);
  if(k3==0)
  { while(!k3);
   if(k2num==1)//调幅+
   {  
          DAC2=tbDAC2[Anum];
       Anum++;
       if(Anum==50)Anum=0;  
                 write_com(0x01);
                lcd_wr_str(0,"  tbDAC2[Anum]/10 . tbDAC2[Anum]%10 V");

   }
   else if(k2num==2)  //调频+

   {    //while(!k3); 
                 Fnum++;
        TH0=tbF[Fnum]; 
     if(Fnum==50)Fnum=0;
                  write_com(0x01);
                 lcd_wr_str(1,"    tbDAC2[Anum]/100 tbDAC2[Anum]/10%10 tbDAC2[Anum]%10 F");

   }
  }

 }
}

void keysub()
{
 if(k4==0)
 {
  delay(10);
  if(k4==0)
  {
   if(k2num==1)//调幅--
   {  
          DAC2=tbDAC2[Anum];
                Anum--;
       if(Anum==0)Anum=50;  
                 write_com(0x01);
                lcd_wr_str(0,"  tbDAC2[Anum]/10 . tbDAC2[Anum]%10 V");

   }
   else if(k2num==2)  //调频--

   {     
                TH0=tbF[Fnum];
              Fnum--; 
     if(Fnum==0)Fnum=50;
                   write_com(0x01);
                 lcd_wr_str(1,"    tbDAC2[Anum]/100 tbDAC2[Anum]/10%10 tbDAC2[Anum]%10 F");

   }
  }
  while(!k4);

 }
}
void main()
{
 init();
    DAC2=0xff;
 while(1)
 {
   sel_wave();
      sel_FV();
      keyadd();
    keysub();
 }
}