aa.c

我做的波形发生器

#include <string.h>
#include<reg51.h>
#include <stdio.h>
#include <absacc.h>

#define uchar unsigned char 
#define uint unsigned int 
#define DA0832 P2
uchar  TAB[]={0,1,2,3,4,5,6,7,8,9};
uchar  disp[6]={' ',' ',' ',' ','H','Z'};
uint freq=0;//频率变量
uchar  code table1[]="Sinusoidal Wave";     //正弦波
uchar  code table2[]="Pyramidal Wave";	   //三角波
uchar  code table3[]="Sawtooth Wave";	   //锯齿波
uchar  code table4[]="Square Wave";		   //方波
uchar  code tosin[256]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,  //正弦波列表
            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 };
 /*------------------------位定义--------------------------------*/
/*sbit PB0=P1^0;
sbit PB1=P1^1;
sbit PB2=P1^2;
sbit PB3=P1^3;
sbit PB4=P1^4;
sbit PB5=P1^5;
sbit PB6=P1^6;
sbit PB7=P1^7;
/*----------------------*/
/*sbit Pc0=P2^0;
sbit Pc1=P2^1;
sbit Pc2=P2^2;
sbit Pc3=P2^3;
sbit Pc4=P2^4;
sbit Pc5=P2^5;
sbit Pc6=P2^6;
sbit Pc7=P2^7;*/
/*---------------------------*/
sfr16 DPTR=0x82;//声明DPTR

sbit RS=P3^0;
sbit RW=P3^1;
sbit E=P3^2;
sbit busy=P0^7;
uchar fun=0,b=0,c=0,d=0,e=0,tl,th;
/*-------------函数声明-------------------*/
int  keyscan();
void key1(void);
void key2(void);
void key3(void);
void key4(void);
void delay_ms(int ms);
void write_cmd(uchar cmd) ;
void write_data(uchar d) ;
void init_lcd();
void lcd_display_xy(char *string , uchar x, uchar y);
void inter_int();
/*******主程序**********/
main()
{
 inter_int();
 init_lcd();
 P2=0xff;
 while(1)
   {          

    keyscan();
   }
}
/*----------定时器初始---------------*/
void inter_int()
{
    TMOD=0X01;
    TR0=1;
    th=0xff;
    tl=0xd0;
    TH0=th;
    TL0=tl;
    ET0=1;
    EA=1;
}
/*******延时**********/
void delay_ms(int ms)
{
 uchar i;
 uint  j;
 for(j=2*ms;j>0;j--) 
  for(i=250;i>0;i--); 
}

/******扫描*********/
int keyscan()
{
  uchar key_value;
  uchar key_temp;
  do
    {
      P1=0xff;
      key_temp=P1;
      delay_ms(5);
      P1=0xff;
      key_value=P1;
     }
   while(key_value!=key_temp);
   if(key_value==0xfe)key1();
   if(key_value==0xfd)key2();
   if(key_value==0xfb)key3();
   if(key_value==0xf7)key4(); 
}

/*-------------1602-------------------*/

void write_cmd(uchar cmd)

{

   RS=0;
   RW=0;
   E=0;
   P0=cmd;
   delay_ms(2);
   E=1;
   delay_ms(2);
   E=0;
}

void write_data(uchar d)

{

   RS=1;
   RW=0;
   E=0;
   P0=d;
   delay_ms(2);
   E=1;
   delay_ms(2);
   E=0;
}

 void lcd_display_xy(char *string , uchar x, uchar y)
{ uchar i;
  
  write_cmd(0x80+0x40*y+x);
  for (i=0;i<strlen(string);i++)
  write_data(string[i]);
}


void init_lcd()
{
    write_cmd(0x3f);
 	write_cmd(0x0c);//不显示光标
	write_cmd(0x06);//指针自加一，整屏显示不移动
	write_cmd(0x01);//清屏
//	lcd_display_xy(table2,2,0);
}


 /*-------------波形设置---------------------*/
void key1(void)             //１键选择发波类型,1为正弦波,2为三角波,3为方波,4为锯齿波
{
 fun++;
 if(fun==5)fun=0x00;
 
}

 void key2(void)            //２键加大频率
{
 tl++;
 if(tl==0x1f)th++;
}

void key3(void)           //３键减小频率
{
 tl--;
 if(tl==0x00)th--;
}

void key4(void)                        //４键显示频率
{
    TR0=0;                                //关闭T0
    DPL=TL0;
    DPH=TH0;
    freq=DPTR;                             //计数量放入freq
    if(freq>=10000)                       //超过10KHZ
        {
          disp[4]=TAB[freq/1000];            // 十位
          disp[3]=TAB[(freq/1000)%10];       //个位
          disp[2]='K';
        }
    else                                    //低于10KHZ
        {
         disp[5]=TAB[(freq/1000)%10];        //千位
         disp[4]=TAB[(freq/100)%10];         //百
         disp[3]=TAB[(freq/10)%10];          //十位
         disp[2]=TAB[freq%10];               //个位
       }
   
    lcd_display_xy(disp,2,0);
     TR0=1;
}


/*-----------------中断服务程序---------------------------*/
void time0_int(void) interrupt 1   
{
    TR0=0;
 if(fun==1)
    {
	DA0832=tosin[b];             //正弦波
    b++;
	}
 else if(fun==2)                //三角波
      {
	   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;
     }
else if(fun==4)        //锯齿波
      {
	   if(e<255)
	           DA0832=e;
         else 
		      DA0832=0;
              e++;
	 }
	   
 TH0=th;
 TL0=tl;
 TR0=1;
}