#include <AT89X52.H>

unsigned char code dispbitcode[]={0xfe,0xfd,0xfb,0xf7,
                                  0xef,0xdf,0xbf,0x7f};
unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f,0x66,
                               0x6d,0x7d,0x07,0x7f,0x6f,0x00};
unsigned char dispbuf[8]={10,10,10,10,0,0,0,0};
unsigned char dispcount;
unsigned char getdata;
unsigned int temp;
unsigned char i;

sbit ST=P3^0;
sbit OE=P3^1;
sbit EOC=P3^2;
sbit CLK=P3^3;


void delay02s(void)
{
unsigned char i,j;
for(i=20;i>0;i--)
for(j=20;j>0;j--)
//for(k=248;k>0;k--)
;
}



/*************************延時程序段************************/
void Delay(unsigned char times)
{
do{;}while(--times);
}

void dispchar(char infotext)
{

	if (P1_0==0)
	{
		P1_1=0;
		P2=dispcode[infotext/10];
		delay02s();
		P1_0=1;

    } else
	{
		P1_0=0;
		P2=dispcode[infotext%10];
		delay02s();
		P1_1=1;
	}
	delay02s();

}

void main(void)
{
  ST=0;
  OE=0;
  ET0=1;
  ET1=1;
  EA=1;
  TMOD=0x12;
  TH0=216;
  TL0=216;
  TH1=(65536-4000)/256;
  TL1=(65536-4000)%256;
  TR1=1;
  TR0=1;
  ST=1;
  ST=0;
  while(1)
    {

      if(EOC==1)
        {
          OE=1;
          getdata=P0;
          OE=0;

          temp=getdata*235;
          temp=temp/128;
          i=5;
          dispbuf[0]=10;
          dispbuf[1]=10;
          dispbuf[2]=10;
          dispbuf[3]=10;
          dispbuf[4]=10;
          dispbuf[5]=0;
          dispbuf[6]=0;
          dispbuf[7]=0;



          while(temp/10)
            {
              dispbuf[i]=temp%10;


              temp=temp/10;
              i++;
            }
          dispbuf[i]=temp;     

          ST=1;
          ST=0;
        }


     		dispchar(dispbuf[i-1]+dispbuf[i]*10);


		//	 dispchar(dispbuf[0]*10);
    }
}

void t0(void) interrupt 1 using 0
{
  CLK=~CLK;
}

void t1(void) interrupt 3 using 0
{ 

	TH1=(65536-4000)/256;
  TL1=(65536-4000)%256;
 // P2=dispcode[dispbuf[dispcount]];
 // P1=dispbitcode[dispcount];
  if(dispcount==7)
    {
      P1=P1 | 0x80;
    }
  dispcount++;
  if(dispcount==8)
    {
      dispcount=0;
    }  

}