/*******************************************
 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 Si7005  0x40




void setup()
{
  I2c.begin();
}

void loop()
{
  uint16_t DATA = 1;
  uint16_t Temperatura = 0;
  uint16_t Humedad = 0;
  
  I2c.write(Si7005,0x03,0x11); //configura el dispositivo para medir temperatura
  delay(15);
  while (DATA&0x0001 == 0x0001)
        {
          I2c.read(Si7005,0x00,1); //read 1 byte
          DATA = I2c.receive();      
        }
  I2c.read(Si7005,0x01,2); //read 2 bytes
  DATA = I2c.receive()<<8;
  Temperatura =(DATA|I2c.receive())>>2;
  
  DATA = 1;
  I2c.write(Si7005,0x03,0x01); //configura el dispositivo para medir temperatura
  delay(15);
  while (DATA&0x0001 == 0x0001)
        {
          I2c.read(Si7005,0x00,1); //read 1 byte
          DATA = I2c.receive();      
        }
  I2c.read(Si7005,0x01,2); //read 2 bytes
  DATA = I2c.receive()<<8;
  Humedad =(DATA|I2c.receive())>>4;
  
  Serial.print("Temperatura: ");
  Serial.print(((float)Temperatura/32)-50);
  Serial.print(" C, Humedad: ");
  Serial.print(((float)Humedad/16)-24);
  Serial.println(" %");     
}


/* 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(); 
}

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