/*******************************************
 Sample sketch that configures an HMC5883L 3 axis
 magnetometer to continuous mode and reads back 
 the three axis of data.
 Code compiles to a size of 1500 bytes
 Equivalent Wire Library code compiles to 2032 bytes
 *******************************************/

#include <I2C.h>

#define HMC5883L  0x1E 

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


void setup()
{
  I2c.begin();
  I2c.write(HMC5883L,0x02,0x00); //configure device for continuous mode
}

void loop()
{
  I2c.read(HMC5883L,0x03,6); //read 6 bytes (x,y,z) from the device
  x = I2c.receive() << 8;
  x |= I2c.receive();
  y = I2c.receive() << 8;
  y |= I2c.receive();
  z = I2c.receive() << 8;
  z |= I2c.receive(); 
}


/* Wire library equivalent would be this 

//#include <Wire.h>

#define HMC5883L  0x1E 

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


void setup()
{
  Wire.begin();
  Wire.beginTransmission(HMC5883L);
  Wire.send(0x02);
  Wire.send(0x00);
  Wire.endTransmission();
}

void loop()
{
  Wire.beginTransmission(HMC5883L);
  Wire.send(0x03);
  Wire.endTransmission();
  Wire.requestFrom(HMC5883L,6);
  x = Wire.receive() << 8;
  x |= Wire.receive();
  y = Wire.receive() << 8;
  y |= Wire.receive();
  z = Wire.receive() << 8;
  z |= Wire.receive(); 
}

********************************************/