main.c

利用c51实行对单片机的控制实现交通信号灯控制系统。 主道要求绿灯点亮48秒

/*交通信号灯控制系统
  主道要求绿灯点亮48秒，黄灯点亮4秒并闪烁，红灯点亮24秒
  侧道要求绿灯点亮24秒，黄灯点亮4秒并闪烁，红灯点亮48秒*/
#include<reg51.h>
unsigned char table[]={
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,
0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,
0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,
0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48
};
void delay();
void de(unsigned char p);
void shine1();
void shine2();
void main()
{ while(1) 
	 {P1=0x0c;
      de(48);
      shine1();
      P1=0x21;
	  de(24);
      shine2();
     }
}
void de(unsigned char p)
{unsigned int n;
   for (n=p;n>=0;n--)
     {P2=table[n];
      delay();
      if (P2==0)
		break;
	 }
}
void delay()
{	unsigned int i,j;
    for(i=100;i>0;i--)
	{	for(j=250;j>0;j--);
	}

}
void shine1()
{ unsigned int n,t=0;
 for (n=4;n>=0;n--)
     {P2=table[n];
      if((t%2)==0) P1=0x0a;
      if((t%2)==1) P1=0x08;
      delay();
      t++;
      if (P2==0)
		break;
  }
  }
void shine2()
{
  unsigned int n,t=0;
  for (n=4;n>=0;n--)
     {P2=table[n];
      if((t%2)==0) P1=0x11;
      if((t%2)==1) P1=0x01;
      delay();
      t++;
      if (P2==0)
		break;
     }
  }