i cant able to communicate with DS1307 and 89v51rd2fbc.can any one help me

void main(void)
{
   unsigned char sec, min, hour, date, month, year;
        Sys_Init();
    watch_dog();
        DS1307_init();
        //DS1307_settime(0x67,0x45,0x00);               /* Set Time (hh:mm:ss) */
        //DS1307_setdate(0x03,0x08,0x06);       /* Set Date (dd/mm/yy) */
        while (1)
        {
                watch_dog();
                /* Get Date & Time */
                sec   = DS1307_get(SEC);
                min   = DS1307_get(MIN);
                hour  = DS1307_get(HOUR);
                date  = DS1307_get(DATE);
                month = DS1307_get(MONTH);
                year  = DS1307_get(YEAR);
        }
}

void DS1307_init(void)
{
        I2C_start();
        I2C_write(DS1307_ID);
        I2C_write(0x00);
        //I2C_write(0x7F);
        //I2C_write(0x80);
        I2C_write(0x00);
        I2C_stop();
        datas[0]='I';
        com_t_index=0;
                com_t_length=1;
                TX_RX=1;
                watch_dog();
                TI=1;

}
unsigned char DS1307_get(unsigned char addr)
{
        unsigned char ret;
        DS1307_init();
        I2C_start();            /* Start i2c bus */
        I2C_write(DS1307_ID);
        I2C_write(IN);
        I2C_write(IN);
        I2C_stop();
        I2C_write(DS1307_ID);   /* Connect to DS1307 */
        I2C_write(addr);                /* Request RAM address on DS1307 */

        I2C_start();                    /* Start i2c bus */

        I2C_write(DS1307_ID+1); /* Connect to DS1307 for Read */
        ret = I2C_read();               /* Receive data */

        //I2C_noack();
         //delay_10ms(10);
        I2C_stop();                             /* Stop i2c bus */

   return ret;
        datas[0]=hextoascii((ret>>4)&0x0F);
                datas[1]=hextoascii((ret)&0x0F);
                com_t_index=0;
                com_t_length=2;
                TX_RX=1;
                watch_dog();
                TI=1;
}

void DS1307_settime(unsigned char hh, unsigned char mm, unsigned char ss)
{
        I2C_start();

        I2C_write(DS1307_ID);   /* connect to DS1307 */
        I2C_write(0x00);                /* Request RAM address at 00H */

        I2C_write(ss);                  /* Write sec on RAM address 00H */
        I2C_write(mm);                  /* Write min on RAM address 01H */
        I2C_write(hh);                  /* Write hour on RAM address 02H */
        //delay_10ms(10);
        I2C_stop();             /* Stop i2c bus */
}

void DS1307_setdate(unsigned char dd, unsigned char mm, unsigned char yy)
{
        I2C_start();

        I2C_write(DS1307_ID);   /* connect to DS1307 */
        I2C_write(0x04);                /* Request RAM address at 04H */

        I2C_write(dd);                  /* Write date on RAM address 04H */
        I2C_write(mm);                  /* Write month on RAM address 05H */
        I2C_write(yy);                  /* Write year on RAM address 06H */
        //delay_10ms(10);
        I2C_stop();                             /* Stop i2c bus */
}

void I2C_delay(void)
{
        unsigned char i;

        for(i=0; i<I2C_DELAY; i++);
}

void I2C_clock(void)
{
        I2C_delay();

        SCL_1 = 1;              /* Start clock */

        I2C_delay();

        SCL_1 = 0;              /* Clear SCL */
}

void I2C_start(void)
{
        if(SCL_1)
        SCL_1 = 0;              /* Clear SCL */

        SDA_1 = 1;        /* Set SDA */
        SCL_1 = 1;              /* Set SCL */

        I2C_delay();

        SDA_1 = 0;        /* Clear SDA */

        I2C_delay();

        SCL_1 = 0;        /* Clear SCL */
}

void I2C_stop(void)
{
        if(SCL_1)
        SCL_1 = 0;                      /* Clear SCL */

        SDA_1 = 0;                      /* Clear SDA */
        I2C_delay();

        SCL_1 = 1;                      /* Set SCL */

        I2C_delay();

        SDA_1 = 1;                      /* Set SDA */
}

bit I2C_write(unsigned char dat)
{
        bit data_bit;
        unsigned char i;

        for(i=0;i<8;i++)                             /* For loop 8 time(send data 1 byte) */
        {
                data_bit = dat & 0x80;              /* Filter MSB bit keep to data_bit */
                SDA_1 = data_bit;                               /* Send data_bit to SDA */

                I2C_clock();                            /* Call for send data to i2c bus */

                dat = dat<<1;
        }

        SDA_1 = 1;                      /* Set SDA */

        I2C_delay();

        SCL_1 = 1;                      /* Set SCL */

        I2C_delay();

        data_bit = SDA_1;       /* Check acknowledge */
//      I2C_ack();

        SCL_1 = 0;                      /* Clear SCL */

        I2C_delay();

        return data_bit;        /* If send_bit = 0 i2c is valid */
}

unsigned char I2C_read(void)
{
        bit rd_bit;
        unsigned char i, dat;

        dat = 0x00;

        for(i=0;i<8;i++)             /* For loop read data 1 byte */
        {
                I2C_delay();

                SCL_1 = 1;                      /* Set SCL */

                I2C_delay();

                rd_bit = SDA_1;         /* Keep for check acknowledge   */
                dat = dat<<1;
                dat = dat | rd_bit;     /* Keep bit data in dat */

                SCL_1 = 0;                      /* Clear SCL */
        }

        return dat;
}

void I2C_ack()
{
        SDA_1 = 0;              // Clear SDA

        I2C_delay();

        I2C_clock();    //Call for send data to i2c bus

        SDA_1 = 1;              // Set SDA
}

void I2C_noack()
{
        SDA_1 = 1;              // Set SDA

        I2C_delay();

        I2C_clock();    // Call for send data to i2c bus

        SCL_1 = 1;              // Set SCL
}

unsigned short int hextoascii (unsigned char c)
{
        unsigned char ch = c;
        unsigned char as1;
        unsigned char as2;

        // take the char and turn it to ASCII

        as1 = ch;
        as1 >>= 4;
        as1 &= 0x0F;
        if ( as1<10 )
                as1 += 48;
        else
                as1 += 55;

        as2 = ch;
        as2 &= 0x0F;
        if ( as2<10 )
                as2 += 48;
        else
                as2 += 55;

        return( ((unsigned short int)(as1)<<8) + as2 );


}