xinhao1.c.c

简易的函数信号发生器 输出正弦波方波锯齿波

#include<reg51.h> 
#define uchar unsigned char 
#define uint unsigned int 
sbit LCP=P2^2; 
sbit SCP=P2^1; 
sbit SI=P2^0; 
sbit S1=P2^3; 
sbit S2=P2^4; 
sbit S3=P2^5; 
sbit S4=P2^6; 
sbit S5=P2^7; 
sbit DA0832=P3^3; 
sbit DA0832_ON=P3^2; 
uchar fun=0,b=0,c=0,d=0,tl,th; 
uchar code tab[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; 
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 }; 
void display(unsigned char command) 
{ 
   unsigned char i; 
   LCP=0; 
   for(i=8;i>0;i--) 
   { 
      SCP=0; 
      if((command & 0x80)==0) 
      { 
         SI=0; 
       } 
       else 
       { 
          SI=1; 
       } 
      command<<=1; 
      SCP=1; 
   } 
    LCP=1; 
} 
void key1(void) 
{ 
    fun++; 
    if(fun==4) 
     fun=0x00; 
} 
void key2(void) 
{ 
    tl++; 
    if(tl==0x1f) 
     th++; 
} 
 void key3(void) 
{ 
    tl--; 
    if(tl==0x00) 
     th--; 
} 
void key4(void) 
{ 
    double t; 
    int f; 
    TR0=0; 
    t=(65535-th*256-tl)*0.4; 
    f=(int)(1000/t); 
    S3=tab[f%10]; 
    f=f/10; 
    S2=tab[f%10]; 
    f=f/10; 
    if(f==0) 
    S1=0; 
    else 
    S1=tab[f]; 
    TR0=1; 
} 
void key5(void) 
{ 
    tl--; 
    if(tl==0x00) 
    th++; 
} 
void judge(void) 
{ 
     uchar line,row,de1,de2,keym; 
     P1=0x0f; 
     keym=P1; 
     if(keym==0x0f)return; 
     for(de1=0;de1<200;de1++) 
     for(de2=0;de2<125;de2++){;} 
     P1=0x0f; 
     keym=P1; 
     if(keym==0x0f)return; 
     P1=0x0f; 
     line=P1; 
     P1=0xf0; 
     row=P1; 
     line=line+row;//存放特征键值
     if(line==0xde)key1(); 
     if(line==0xbd)key3();
     if(line==0x7e)key2(); 
     if(line==0x7d)key4(); 
} 
void time0_int(void) interrupt 1 //中断服务程序 
{ 
     TR0=0; 
     if(fun==1) 
     { 
       DA0832=tosin[b]; //正弦波 
       b++; 
      } 
     else if(fun==2) //锯齿波 
      { 
      if(c<128) 
      DA0832=c; 
      else 
      DA0832=255-c; 
      c++; 
       } 
     else if(fun==3) // 方波 
       { 
        d++; 
        if(d<=128) 
        DA0832=0x00; 
        else 
        DA0832=0xff; 
        } 
        TH0=th; 
        TL0=tl; 
        TR0=1; 
} 
void main(void) 
{ 
        TMOD=0X01; 
        TR0=1; 
        th=0xff; 
        tl=0xd0; 
        TH0=th; 
        TL0=tl; 
         ET0=1; 
         EA=1; 
        while(1) 
        { 
         display(); 
         judge(); 
         } 
}