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/*******************************************
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();
}
********************************************/
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