I am interfacing ds12c887, P89c60x2 in c language. the aim is to read time and send it serially to PC. With the program shown below i am getting the time displayed on the system hyper terminal. but WITHOUT UPDATE!. THE TIME IS NOT GETTING UPDATED. please tell me the mistakes in my program.
//-------------PROGRAM TO READ TIME AND SEND IT SERIALLY-------
#include<reg51.h>
#include<absacc.h>//to use XBYTE

unsigned char hr,min,sec;

void bcdconvert(unsigned char);
void serialsend(unsigned char);
void Delay(unsigned char);

void main(void){
Delay(200);

//55SEC 48 MIN 3 HR 15-02-08

XBYTE[10]=0X20;//TURN ON OSC

XBYTE[11]=0X83;//TURN OFF TIME UPDATE

XBYTE[0]=0X55;
XBYTE[2]=0X48;
XBYTE[4]=0X15;
XBYTE[7]=0X15;
XBYTE[8]=0X02;
XBYTE[9]=0X08;

XBYTE[11]=0X03;//start updating time

TMOD=0x20;
TH1=0xfd;
SCON=0x50;
TR1=1;

while(1){

hr=XBYTE[4];
bcdconvert(hr);
serialsend(':');

min=XBYTE[2];
bcdconvert(min);
serialsend(':');

sec=XBYTE[0];
bcdconvert(sec);

serialsend(0x0d); //CARRIAGE RETURN
serialsend(0x0a); //NEWLINE
}
}
//To covert bcd to hex code
void bcdconvert(unsigned char mybyte){
unsigned char x,y;
x=mybyte&0x0f;
x=x|0x30;
y=mybyte&0xf0;
y=y>>4;
y=y|0x30;
serialsend(y);
serialsend(x);
}
//send serially to pc
void serialsend(unsigned char x){
SBUF=x;
while(TI==0);
TI=0;
}
//osc takes 200ms to power on.
void Delay(unsigned char x){
unsigned char i,j;
for(i=0;i<x;i++)
for(j=0;j<1000;j++);
}
//-----------------------THANK YOU---------------------