why i am i not able to write anything on 24LC356 eeprom

[jay]

I am using blenano with mbed compiler and a 24LC256 eeprom.

the output o screen I get is the no. of total chars, i.e, 65355. below is the code.

#include "mbed.h"
#include "ble/BLE.h"
#include "SoftI2C.h"

int test =1000;

  lcd.clear();
                lcd.setPosition(0, 0);
    lcd.printf("Writing bytes 0-16\n");
  wait(0.2);
    char data[4];
   
 
    data[0] = 0;       // MSB address
    data[1] = 255;     // LSB address
    data[2] = test;     // data
    data[3] = test>>8;
    if(i2c.write(0xA0, data, 4)) {
        lcd.clear();
                lcd.setPosition(0, 0);

        lcd.printf("Write failed\n");
    }
    while(i2c.write(0xA0, NULL, 0));           
 lcd.clear();
                lcd.setPosition(0, 0);
    lcd.printf("Setting read pointer to 0\n");
 wait(0.2);
   
 lcd.clear();
 lcd.setPosition(0, 0);
  lcd.printf("Reading back data bytes 0-16\n");
   wait(0.2);
    char response[2];
    for(int i=0; i<256; i++) {
        if(i2c.read(0xA0+0x01, response, 2)) {
            error("Read failed\n");
        }
       lcd.clear();
  lcd.setPosition(0, 0);
 lcd.printf("address  %d", (response[0]<<8)|response[1]);

[jay]

*/

#include "mbed.h"
#include "wire.h"
 
#define BLE_Nano
//#define nRF_51822
 
 
#ifdef nRF_51822
#define SCL         28
#define SDA         29
#endif
 
#ifdef BLE_Nano
#define SCL         7  
#define SDA         6
#endif
 
#define DEV_ADDR    0xA0
 
Serial pc(USBTX, USBRX);
TwoWire Wire = TwoWire(NRF_TWI0);
 
void AT24C512_WriteBytes(uint16_t addr, uint8_t *pbuf, uint16_t length)
{
    Wire.beginTransmission(DEV_ADDR);
    Wire.write( (uint8_t)addr>>8 );
    Wire.write( (uint8_t)addr );
    Wire.write(pbuf, length);
    Wire.endTransmission();
}
 
void AT24C512_ReadBytes(uint16_t addr, uint8_t *pbuf, uint16_t length)
{
    Wire.beginTransmission(DEV_ADDR);
    Wire.write( (uint8_t)addr>>8 );
    Wire.write( (uint8_t)addr );    
    Wire.endTransmission();
       
    Wire.requestFrom(DEV_ADDR+1, length);
    while( Wire.available() > 0 )
    {
        *pbuf = Wire.read();
        pbuf++;
    }
}
 
 
static uint8_t wt_data[10] = {'H', 'e', 'l', 'l', 'o', 'W', 'o', 'r', 'l', 'd'};
static uint8_t rd_data[10];
 
static uint16_t index;
 
int main(void)
{
    pc.baud(9600);
    wait(5);
    //Wire.begin();
    Wire.begin(SCL, SDA, TWI_FREQUENCY_100K);
    pc.printf("IIC Demo Start \r\n");
    
    AT24C512_WriteBytes(0, wt_data, 10);
    wait(0.1);
    
    while(1)
    {
        AT24C512_ReadBytes(0, rd_data, 10);     
        pc.printf("Read data from AT24C512 \r\n");
        for(index=0; index<10; index++)
        {
            pc.putc(rd_data[index]);
            rd_data[index] = 0x00;
        }
        pc.printf("\r\n");
        wait(1);
    }
}