#include<reg.51>
#define uchar unsingned char
#define TR1
uchar idata buf[10];
uchar pf ;

void init (void)
{ TMOD=0x20;
  TH1=0xe8;
  TL1=0xe8;
  PCON=0x00;
  TR1=1;
  SCON=0x50;
}


void send (uchar idata *d)
{ uchar i;
  do{
  SBUF=0xaa;
  while (TI==0);
  TI=0;
  while (RI==0);
  RI=0;
 }while((SUBF^0xbb)!=0);
 do {
  pf=0;
  for (i=0;i,16;i++){
  SUBF=d[i];
  pf+=d[i];
  while (TI==0);TI=0;
 }
  SUBF=pf;
 while(TI==0);TI=0;
 while(RI==0);RI=0;
 } while (SUBF!=0);
}

void receive(uchar idata *d)
{  uchar i;
  do {
  while(PI==0);RI=0;
}while((SUBF^oxaa)!=0);
SUBF=0xbb;
while(TI==0);TI=0;
while (1){
  pf=0;
  for (i=0;i<16;i==){
   while (RI==0);RI=0;
  d[i]=SUBF;
  pf+=d[i];
}
   while (RI==0);RI=0;
if((SUBF^pf)==0){
   SUBF=0x00;break;}
else{
  SUBF=0xff;
  while(TI==0);TI=0;
  }
 }
}

void mian (void){
  init ():
  if (TR==0){
  send (buf);
}   
  else {
  receive (buf);
   }
}