单片机实验 串并口转换

#include<reg51.h>
unsigned char k=10;
unsigned char temp=0,temp1=1;
unsigned char con1s=0,count2=0,count3=0,con001s=0;
unsigned char buffer[]={0,0,0,0,0,0,0,0};
unsigned char buffer1[]={0,0,0,0,0,0,0,0}; 
unsigned char buffer2[]={0,0,0,0,0,0}; 
unsigned char table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40,0x00};
sbit key1=P1^0;
sbit key2=P1^1;
sbit key3=P1^2;
sbit key4=P1^3;
sbit key5=P1^4;
sbit key6=P1^5;
sbit key7=P1^6;
void display1();
void display2();
void display3();
void key();
void delay(unsigned int k)
{
 unsigned int i,j;
 for(j=0;j<k;j++)
 for(i=0;i<20;i++); 
}
void main()
{
 TMOD=0X01;
 TH0=0X3C;
 TL0=0XB0;

 TH1=0X3C;
 TL1=0XB0;
 EA=1;ET0=1;TR0=1;
 ET1=0;TR1=0;
 while(1)
  {
    while(temp==0)
   {
    display1();key();
   }
   while(temp==1)
   {
    display2();key();
   }
   while(temp1==0)
    {
 display3();key();
}
  }
}
void time() interrupt 1 using 1
{
  ET0=0;TR0=0;TH0=0XEC;TL0=0X78;TR0=1;
  con1s++;
if(con1s==10)
  {
    con1s=0;count2++;
if(count2==5)
{
     count2=0;k=11;count3++;