[SOLVED] Hmc5883L Compass sensor interfacing with lpc2148

Unsigned char HMC5883l()
{
  UHWORD x,y,z,x1,y1,z1,Msb,Lsb;
	float x2;
	I2C_Master_Write_0(HMC5883L_WriteAddress);
	TransmitBuffer[0] = 0x00; // config register a
	TransmitBuffer[1]=0x70,
	TransmitBuffer[2]=0x18;
	Data(TransmitBuffer,3);// sends the datas
  I2C_Stop();
	
	I2C_Master_Write_0(HMC5883L_WriteAddress);
	Single_Byte(0x01); //  config register b
	Single_Byte(0x40); // gain value
  I2C_Stop();
	
	I2C_Master_Write_0(HMC5883L_WriteAddress);
	Single_Byte(HMC5883L_ModeRegisterAddress); 
	Single_Byte(HMC5883L_ContinuousModeCommand);// setting continous mode
  I2C_Stop();

	I2C_Master_Read_0(HMC5883L_ReadAddress,6); // read all six registers
  Msb = ReceiveBuffer[0];
	Lsb = ReceiveBuffer[1];
  x = (Msb<<8)|Lsb; // storing 16 bit value in a single variable
	x1 = ~x;
	x1 =(x1+1);// performs two's complement
	
	
	
	LCD_Command(0x80);
	Display_Integer(x1,16);
	
	Msb = I2C_0_ReceiveBuffer[2];
	Lsb = I2C_0_ReceiveBuffer[3];

  z = (Msb<<8)|Lsb;
	z1 = ~z;
	z1 =(z1+1);
	LCD_Command(0x85);
	Display_Integer(z1,16);
	Msb = I2C_0_ReceiveBuffer[4];
	Lsb = I2C_0_ReceiveBuffer[5];
  	
  y = (Msb<<8)|Lsb;
	y1 = ~y;
	y1 =(y1+1);

	LCD_Command(0x89);

	Display_Integer(y1,16);
	
	I2C_Master_Write_0(HMC5883L_WriteAddress);
        Single_Byte(HMC5883L_DataOutputXMSBAddress);

	x2=atan2(y1,x1)* (180 /3.14159265) + 180; // calculating angle
	
	return x2;

}