static void I2C1_GPIO_Config(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  //GPIO_DeInit(GPIOB);

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

  // Configure I2C1 pins: SCL and SDA
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
}

void I2C_delay(void)
{
   unsigned int i=150;
   while(i)
   {
     i--;
   }
}

bool I2C1_Start(void)
{
 SDAH;
 SCLH;
 I2C_delay();
 if(!SDAread)return FALSE;
 SDAL;
 I2C_delay();
 if(SDAread) return FALSE;
 SDAL;
 I2C_delay();
 return TRUE;
}

void I2C1_Stop(void)
{
 SCLL;
 I2C_delay();
 SDAL;
 I2C_delay();
 SCLH;
 I2C_delay();
 SDAH;
 I2C_delay();
}

void I2C1_Ack(void)
{
 SCLL;
 I2C_delay();
 SDAL;
 I2C_delay();
 SCLH;
 I2C_delay();
 SCLL;
 I2C_delay();
}

void I2C1_NoAck(void)
{
 SCLL;
 I2C_delay();
 SDAH;
 I2C_delay();
 SCLH;
 I2C_delay();
 SCLL;
 I2C_delay();
}

bool I2C1_WaitAck(void)
{
 SCLL;
 I2C_delay();
 SDAH;
 I2C_delay();
 SCLH;
 I2C_delay();
 if(SDAread)
 {
          SCLL;
          return FALSE;
 }
 SCLL;
 return TRUE;
}

void I2C1_SendByte(unsigned char SendByte)
{
    unsigned char i=8;
    while(i--)
    {
        SCLL;
        I2C_delay();
        if(SendByte&0x80)
          SDAH;
        else
        SDAL;
        SendByte<<=1;
        I2C_delay();
 SCLH;
        I2C_delay();
    }
    SCLL;
}

unsigned char I2C1_ReceiveByte(void)
{
    unsigned char i=8;
    unsigned char ReceiveByte=0;

    SDAH;
    while(i--)
    {
      ReceiveByte<<=1;
      SCLL;
      I2C_delay();
      SCLH;
      I2C_delay();
      if(SDAread)
      {
        ReceiveByte|=0x01;
      }
    }
    SCLL;
    return ReceiveByte;
}


unsigned char I2C1_ReadByte( unsigned char DeviceAddress, int ReadAddress)
{
    unsigned char temp;
    if(!I2C1_Start())return FALSE;

    I2C1_SendByte((DeviceAddress & 0xFE));
    if(!I2C1_WaitAck()){I2C1_Stop(); return FALSE;}


    I2C1_SendByte((unsigned char)((ReadAddress>>8) & 0xFF));
    I2C1_WaitAck();
    I2C1_SendByte((unsigned char)((ReadAddress) & 0xFF));
    I2C1_WaitAck();
    I2C1_Start();
    I2C1_SendByte((DeviceAddress & 0xFE)|0x01);
    I2C1_WaitAck();

    temp = I2C1_ReceiveByte();

    I2C1_NoAck();

    I2C1_Stop();
    return temp;
}

/************************************MAIN****************************/
int main( void )
{
  prvSetupHardware();
  I2C1_GPIO_Config();
  initDisplay();
  itoc(I2C1_ReadByte(I2C_ADDRESS, 0x0F));
  GLCD_displayStringLn(Line3, string);
}