STM32F4 I2C Receiver Problem

#include <Wire.h>

void setup()

{

  Wire.begin(0xAA);                // join i2c bus with address #4

  Wire.onReceive(receiveEvent); // register event

  Wire.onRequest(requestEvent);

  Serial.begin(115200);           // start serial for output

}

void loop()

{

  delay(100);

}

void receiveEvent(int howMany)

{

  while(1 < Wire.available()) // loop through all but the last

  {

    char c = Wire.read(); // receive byte as a character

    Serial.print(c);         // print the character

  }

  char x = Wire.read();    // receive byte as an integer

  Serial.println(x);         // print the integer

}

void requestEvent()

{

  Wire.write("hello"); // respond with message of 6 bytes

                       // as expected by master

}

I2C_Send7bitAddress(I2C2, 0xAA >> 1, I2C_Direction_Receiver);

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) == SET) {

    ;

  }

#include "stm32f4xx.h"

volatile unsigned int counter = 0;

volatile uint16_t arr[500];

/* Private macro */

/* Private variables */

void Delay(__IO uint32_t nCount);

/* Private function prototypes */

void setup_gps(void);

void setup_pc(void);

void setup_led(void);

void setup_exti_line0(void);

void setup_i2c();

void write_LSM303DLH(uint8_t adr, uint8_t * data, uint8_t lenght,

    uint8_t offset);

void read_LSM303DLH(uint8_t adr, uint8_t * data, uint8_t lenght, uint8_t index);

/* Private functions */

/**

 **===========================================================================

 **

 **  Abstract: main program

 **

 **===========================================================================

 */

int main(void) {

  SystemInit();

  int i = 0;

  uint64_t adr = 0x080E0000;

  /*uint64_t def =  *((uint64_t*)0x1FFF7A10);

   uint64_t read_data = *((uint64_t*)adr);

   *((uint64_t*)adr) = 0x00000000;

   uint64_t read_data2 = *((uint64_t*)adr);*/

  setup_gps();

  setup_pc();

  setup_led();

  setup_exti_line0();

  setup_i2c();

  Delay(0x3FFFFF);

  ///////////////////////////////////////////////////////////////////////////////

  /*uint8_t t[] = { 0x02, 0x00 };

   write_LSM303DLH(MAG_ADDRESS, t, 2, 0);

   t[0] = 0x00;

   t[1] = (1 << 3) | (1 << 4);

   write_LSM303DLH(MAG_ADDRESS, t, 2, 0);

   Delay(0x3FFFFF);

   t[0] = 0x20;

   t[1] = 0x27;

   write_LSM303DLH(ACC_ADDRESS, t, 2, 0);

   Delay(0x3FFFFF);

   uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0 };

   read_LSM303DLH(MAG_ADDRESS, out, 6, 0x03);

   int x = 0, y = 0, z = 0;

   x = (out[0] << 8 | out[1]);

   y = (out[2] << 8 | out[3]);

   z = (out[4] << 8 | out[5]);*/

  while (I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY) == SET) {

    ;

  }

  I2C_GenerateSTART(I2C2, ENABLE);

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT) == SET) {

    ;

  }

  I2C_Send7bitAddress(I2C2, 0xAA >> 1, I2C_Direction_Transmitter);

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)

      == SET) {

    ;

  }

  I2C_SendData(I2C2, 'H');

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED) == SET) {

    ;

  }

  I2C_SendData(I2C2, 'E');

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED) == SET) {

    ;

  }

  I2C_GenerateSTOP(I2C2, ENABLE);

  /////////////////////////////////////////////////////////////////////////////////////////////

  while (I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY) == SET) {

    ;

  }

  I2C_GenerateSTART(I2C2, ENABLE);

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT) == SET) {

    ;

  }

  I2C_Send7bitAddress(I2C2, 0xAA >> 1, I2C_Direction_Receiver);

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) == SET) {

    ;

  }

  char abc[5];

  abc[0] = I2C_ReceiveData(I2C2);

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED) == SET) {

    ;

  }

  abc[1] = I2C_ReceiveData(I2C2);

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED) == SET) {

    ;

  }

  abc[2] = I2C_ReceiveData(I2C2);

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED) == SET) {

    ;

  }

  abc[3] = I2C_ReceiveData(I2C2);

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED) == SET) {

    ;

  }

  abc[4] = I2C_ReceiveData(I2C2);

  while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED) == SET) {

    ;

  }

  I2C_GenerateSTOP(I2C2, ENABLE);

  USART_SendData(USART2,abc[0]);

  USART_SendData(USART2,abc[1]);

  USART_SendData(USART2,abc[2]);

  USART_SendData(USART2,abc[3]);

  USART_SendData(USART2,abc[4]);

  /////////////////////////////////////////////////////////////////

  while (1) {

  }

}

void setup_i2c() {

  /*  GPIO Setup  */

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);

  GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_I2C2);

  GPIO_PinAFConfig(GPIOB, GPIO_PinSource11, GPIO_AF_I2C2);

  GPIO_InitTypeDef GPIO_I2C;

  GPIO_I2C.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;

  GPIO_I2C.GPIO_Mode = GPIO_Mode_AF;

  GPIO_I2C.GPIO_OType = GPIO_OType_OD;

  GPIO_I2C.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_I2C.GPIO_PuPd = GPIO_PuPd_NOPULL;

  GPIO_Init(GPIOB, &GPIO_I2C);

  /*  I2C Setup  */

  I2C_InitTypeDef I2C_init;

  I2C_init.I2C_Mode = I2C_Mode_I2C;

  I2C_init.I2C_ClockSpeed = 400000;

  I2C_init.I2C_DutyCycle = I2C_DutyCycle_16_9;

  I2C_init.I2C_OwnAddress1 = 0x00;

  I2C_init.I2C_Ack = I2C_Ack_Enable;

  I2C_init.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

  I2C_Init(I2C2, &I2C_init);

  I2C_Cmd(I2C2, ENABLE);

}