#include <reg51.h>                         
#define uchar unsigned char 
#define uint unsigned int 
sbit key1=P1^0;
sbit key2=P1^1;
sbit wr=P3^6; 
sbit cs=P3^7; 
long int  a=0, b=0;

void delay(unsigned char i) 
{
uchar j,k;
for(j=i;j>0;j--)
for(k=6;k>0;k--);
}

unsigned char code table[449]=
{


  0x80,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,					 //方波
       0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
       0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
       0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	   
       0x80,0x8d,0x99,0xa5,0xb1,0xbc,0xc7,0xd1,
       0xda,0xe3,0xea,0xf1,0xf6,0xfa,0xfd,0xff,					 //正弦波
       0xff,0xff,0xfd,0xf9,0xf5,0xef,0xe9,0xe1,
       0xd8,0xcf,0xc5,0xba,0xae,0xa2,0x96,0x89,
       0x80,0x72,0x66,0x5a,0x4e,0x43,0x38,0x2e,
       0x25,0x1c,0x15,0x0e,0x09,0x05,0x02,0x00,
       0x00,0x00,0x02,0x06,0x0a,0x10,0x16,0x1e,
       0x27,0x30,0x3a,0x45,0x51,0x5d,0x69,0x76,

	   
       0x00,0x04,0x08,0x0c,0x10,0x14,0x18,0x1c,		 
       0x20,0x24,0x28,0x2c,0x30,0x34,0x38,0x3c,
       0x40,0x44,0x48,0x4c,0x50,0x54,0x58,0x5c,
       0x60,0x64,0x68,0x6c,0x70,0x74,0x78,0x7c,		
       0x7c,0x78,0x74,0x70,0x6c,0x68,0x64,0x60,
       0x5c,0x58,0x54,0x50,0x4c,0x48,0x44,0x40,
       0x3c,0x38,0x34,0x30,0x2c,0x28,0x24,0x20,
       0x1c,0x18,0x14,0x10,0x0c,0x08,0x04,0x00,


       0x00,0x04,0x08,0x0c,0x10,0x14,0x18,0x1c,
       0x20,0x24,0x28,0x2c,0x30,0x34,0x38,0x3c,
       0x40,0x44,0x48,0x4c,0x50,0x54,0x58,0x5c,
       0x60,0x64,0x68,0x6c,0x70,0x74,0x78,0x7c,
       0x80,0x84,0x88,0x8c,0x90,0x94,0x98,0x9c,
       0xa0,0xa4,0xa8,0xac,0xb0,0xb4,0xb8,0xbc,
       0xc0,0xc4,0xc8,0xcc,0xd0,0xd4,0xd8,0xdc,
       0xe0,0xe4,0xe8,0xec,0xf0,0xf4,0xf8,0xfc,

       0x00,0x08,0x10,0x18,0x20,0x28,0x30,0x38,					 
       0x40,0x48,0x50,0x58,0x60,0x68,0x70,0x78,
       0x80,0x88,0x90,0x98,0xa0,0xa8,0xb0,0xb8,
       0xc0,0xc8,0xd0,0xd8,0xc0,0xe8,0xf0,0xf8,
       0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,
       0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,
       0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,
       0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,

       0x00,0x04,0x08,0x0c,0x10,0x14,0x18,0x1c,		             //梯形波
       0x20,0x24,0x28,0x2c,0x30,0x34,0x38,0x3c,
       0x40,0x44,0x48,0x4c,0x50,0x50,0x50,0x50,
       0x50,0x50,0x50,0x50,0x50,0x50,0x50,0x50,
       0x50,0x50,0x50,0x50,0x50,0x50,0x50,0x50,
       0x50,0x50,0x50,0x50,0x4c,0x48,0x44,0x40,
       0x3c,0x38,0x34,0x30,0x2c,0x28,0x24,0x20,
       0x1c,0x18,0x14,0x10,0x0c,0x08,0x04,0x00,


       0x80,0x8d,0x99,0xa5,0xb1,0xbc,0xc7,0xd1,					 //波浪
       0xda,0xe3,0xea,0xf1,0xf5,0xf8,0xfa,0xfd,		 
       0xff,0xfd,0xfa,0xf8,0xf5,0xef,0xe9,0xe1,
       0xd8,0xcf,0xc5,0xba,0xae,0xa2,0x96,0x89,
       0x80,0x8d,0x99,0xa5,0xb1,0xbc,0xc7,0xd1,		 
       0xda,0xe3,0xea,0xf1,0xf5,0xf8,0xfa,0xfd,		 
       0xff,0xfd,0xfa,0xf8,0xf5,0xef,0xe9,0xe1,
       0xd8,0xcf,0xc5,0xba,0xae,0xa2,0x96,0x89,


 };
void key()
{
if(key1==0)	
				{
					delay(500);
					if(key1==0)
					 a=a+64;
                  if(a==448)
                 {
                      a=0;
                              }
  
					while(!key1);		
				}
if(key2==0)	    
		    {
					delay(500);
					if(key2==0)
			  {
                 b=b+6;
                 if(b==36)
               {
                  b=0;
                       }
							
					while(!key2);		
                                 }
}
}

void main()
{
uchar n;              
cs=0;
wr=0;
while(1)
  {
      key();
     for(n=64;n>=1;n--)
      {

      delay(b);
      P0=table[n+a];

 }
 }
}