zhixianpao.c

本人学习单片机一年多时间厚参加全国电子设计大赛的程序以及赛前练习的程序。

#include<reg51.h>

sbit P1_0=P1^0;
sbit P1_1=P1^1;
sbit P1_2=P1^2;
sbit P1_3=P1^3;

unsigned int i,j,k,l,m,x,yichu,dir,jinru;
unsigned char deng,th,tl;

void delay(void);

void timer0(void) interrupt 1
{yichu++;
 if(yichu==1)
 {yichu=0;
  x++;
  if(P1_3==0)
   P1_3=1;
  else
   P1_3=0;
  if(x%2==1)
  {th=0xF4;    //3ms
   tl=0x48;
	}
  else
  {th=0xE4;    //7ms
   tl=0xA8;
	}
 }
 TH0=th;
 TL0=tl;
}

main()
{P1_0=0;
 P1_1=0;
 P1_2=0;
 P1_3=0;
 EA=1;
 ET0=1;
 TMOD=0x01;
 TH0=0xF4;    //2ms
 TL0=0x48;
 TR0=1;
 for(;;)
 {deng=P1&0xF0;
  if(deng==0xD0)              /* 0x0A=0000'101'1 不转弯  */
	  {P1_0=0;
	   P1_1=0;
	   delay();
      }
    else if(deng==0xC0)        /* 0x0A=0000'001'1 右偏 ->左 */
	  {dir=1;
	   if(jinru==1)
		{P1_0=1;
       P1_1=0;
		 delay();
		 }
		else
		{P1_0=0;
       P1_1=1;
		 delay();
		 }
		continue;
      }
    else if(deng==0xE0)        /* 0x0A=0000'011'1 右偏 ->左 */
	  {dir=1;
	   if(jinru==1)
		{P1_0=1;
       P1_1=0;
		 delay();
		 }
		else
		{P1_0=0;
       P1_1=1;
		 delay();
		 }
		continue;
      }
    else if(deng==0x90)       /* 0x0A=0000'100'1 左偏 ->右 */
	  {dir=2;
	   if(jinru==1)
		{P1_0=0;
		 P1_1=1;
		 delay();
		 }
		else
		{P1_0=1;
       P1_1=0;
		 delay();
		 }
		continue;
      }
    else if(deng==0xB0)        /* 0x0A=0000'110'1 左偏 ->右 */
	  {dir=2;
	   if(jinru==1)
		{P1_0=0;
		 P1_1=1;
		 delay();
		 }
		else
		{P1_0=1;
       P1_1=0;
		 delay();
		 }
		continue;
      }
    else if(deng==0x80)        /* 0x0A=0000'000'1 不可能情况 */
	  {delay();
	   continue;
      }
    else if(deng==0xF0)       //(deng==0xF0)        /* 0x0A=0000'111'1 
	  {if(dir==1)
	   {P1_0=0;
       P1_1=1;
		 delay();
		 }
		else if(dir==2)
		{P1_0=1;
       P1_1=0;
		 delay();
		 }
		jinru=1;
		continue;
      }
  }
}

void delay()
{unsigned int i,j;
 for(i=0;i<10;i++)
  for(j=0;j<120;j++)
  ;
}

/*
  if(x%2==1)
  {th=0xFC;    //1ms
   tl=0x18;
	}
  else
  {th=0xDC;    //9ms
   tl=0xD8;
	}
  if(x%2==1)
  {th=0xF8;    //2ms
   tl=0x30;
	}
  else
  {th=0xE0;    //8ms
   tl=0xC0;
	}
  if(x%2==1)
  {th=0xE4;    //7ms
   tl=0xA8;
	}
  else
  {th=0xF4;    //3ms
   tl=0x48;
	}
  if(x%2==1)
  {th=0xEC;    //5ms
   tl=0x78;
	}
  else
  {th=0xEC;    //5ms
   tl=0x78;
	}
  if(x%2==1)
  {th=0xE8;    //6ms
   tl=0x90;
	}
  else
  {th=0xF0;    //4ms
   tl=0x60;
   }
*/