problem in reading and sending data in eeprom using 8051(code given below)

//Program to display String on LCD

//Program to interface Serial EEPROM AT24C02 with 8051 microcontroller (AT89C51)
#include<reg51.h>
#include<intrins.h> //For using [_nop_()]

sbit sda=P1^0;
sbit scl=P1^1;
sbit led=P0^1;
bit ack;
sbit led1=P0^2;
sbit sav=P0^4;
sbit up=P0^5;
sbit down=P0^6;
sfr lcd_data_pin=0xA0;//p2 port
sfr output=0x80;//p0 port
sbit rs=P3^1;

sbit en=P3^0;
unsigned char reead,write;
unsigned int temp,new_value1,new_value,test=0,num=0,i,j;
void init() // to initialize the output pins and Timer0
{ up=down=1;

TMOD=0x01;
TL0=0xf6;
TH0=0xFf;
IE=0x82;
TR0=1;
} void delay(unsigned int count)
{ int i,j; for(i=0;i<count;i++) for(j=0;j<1275;j++);
} void lcd_command(unsigned char comm)
{ lcd_data_pin=comm; en=1; rs=0; delay(1); en=0;
} void lcd_data(unsigned char disp)
{ lcd_data_pin=disp; en=1; rs=1; delay(1); en=0;
} lcd_strng(unsigned char *disp)
{ int x; for(x=0;disp[x]!=0;x++) { lcd_data(disp[x]); }
} void lcd_ini()
{ lcd_command(0x38); // for using 8-bit 2 row LCD delay(5); lcd_command(0x0F); // for display on, cursor blinking delay(5); lcd_command(0x80); delay(5);
} void aknowledge() //acknowledge condition
{ scl=1; _nop_(); _nop_(); scl=0;
} void start() //start condition
{ sda=1; scl=1; _nop_(); //No operation _nop_(); sda=0; scl=0;
} void stop() //stop condition
{ sda=0; scl=1; _nop_(); _nop_(); sda=1; scl=0;
} void send_byte(unsigned int value) //send byte serially
{

unsigned int i; unsigned int send;

send=value; for(i=0;i<8;i++) { sda=send/128; //extracting MSB send=send<<1; //shiftng left scl=1; _nop_(); _nop_(); scl=0; } ack=sda; //reading acknowledge sda=0;
} unsigned char read_byte() //reading from EEPROM serially
{ unsigned int i; sda=1; reead=0; for(i=0;i<8;i++) { reead=reead<<1; scl=1; _nop_(); _nop_(); if(sda==1) reead++; scl=0; } sda=0; return reead; //Returns 8 bit data here
} void save() //save in EEPROM
{ init(); while(1) { if(up==0&&down==1) //check if up pin is pressed { test++; num=test; new_value=num%10; num=num/10; if(test==9) test=0;

} if(up==1&&down==0) //check if down pin is pressed { test--; num=test; new_value=num%10; num=num/10; if(test==0) test=9;

}

start(); send_byte(0xA0); //device address aknowledge(); send_byte(0x00); //word address aknowledge(); send_byte(new_value); //send data aknowledge(); stop(); if(ack==0) { /* new_value1=new_value1+48; */ led1=1; delay(100); led1=0; delay(100); lcd_command(0x86); lcd_data(new_value);

} else led1=1; aknowledge();
}

}

void Read()
{ start(); send_byte(0xA0); aknowledge(); send_byte(0x00); aknowledge(); start(); send_byte(0xA1); //device address aknowledge(); i=read_byte(); aknowledge(); stop(); if(i==new_value) { led=0; delay(100); led=1; delay(100); write=i+48; lcd_command(0xC6); lcd_data(write); } else led=1;

aknowledge();
}

void main()
{ lcd_ini();

lcd_strng("Sent :"); lcd_command(0xC0); lcd_strng("Read :"); temp=0; while(1) { save(); Read(); } }