arduino code to read ADXL345 and to send the data to PC serially

// Cabling for i2c using Sparkfun breakout with an Arduino Uno / Duemilanove:
// Arduino <-> Breakout board
// Gnd      -  GND
// 3.3v     -  VCC
// 3.3v     -  CS
// Analog 4 -  SDA
// Analog 5 -  SLC
//https://github.com/jenschr/Arduino-libraries/blob/master/ADXL345/examples/ADXL345_no_library/BareBones_ADXL345.pde



#include <Wire.h>

#define DEVICE (0x53) // Device address as specified in data sheet

byte _buff[6];

char POWER_CTL = 0x2D;  //Power Control Register
char DATA_FORMAT = 0x31;
char FIFO_CTL = 0x38;
char BW_RATE = 0x2C;
char DATAX0 = 0x32; //X-Axis Data 0
char DATAX1 = 0x33; //X-Axis Data 1
char DATAY0 = 0x34; //Y-Axis Data 0
char DATAY1 = 0x35; //Y-Axis Data 1
char DATAZ0 = 0x36; //Z-Axis Data 0
char DATAZ1 = 0x37; //Z-Axis Data 1

void setup()
{
  Wire.begin();        // join i2c bus (address optional for master)
  Serial.begin(250000);  // start serial for output. Ensure Serial Monitor at same rate
 // Serial.print("init");
 
  //Put the ADXL345 into +/- 2G range by writing the value 0x01 to the DATA_FORMAT register.
  writeTo(DATA_FORMAT, 00001000);
  writeTo(FIFO_CTL, 10000000);
  writeTo(BW_RATE, 00001111);
  //Put the ADXL345 into Measurement Mode by writing 0x08 to the POWER_CTL register.
  writeTo(POWER_CTL, 0x08);
 
}

void loop()
{
  readAccel(); // read the x/y/z tilt
  delay(100); // only read every 0,5 seconds
}

void readAccel() {
  uint8_t howManyBytesToRead = 6;
  readFrom( DATAX0, howManyBytesToRead, _buff); //read the acceleration data from the ADXL345

  // each axis reading comes in 10 bit resolution, ie 2 bytes.  Least Significat bit first!!
  // thus we are converting both bytes in to one int
  int x = (((int)_buff[1]) << 8) | _buff[0];  
  int y = (((int)_buff[3]) << 8) | _buff[2];
  int z = (((int)_buff[5]) << 8) | _buff[4];
 // Serial.print("x: ");
  Serial.print( x );
  Serial.print(",");
  Serial.print( y );
  Serial.print(",");
  Serial.println( z );
}

void writeTo(byte address, byte val) {
  Wire.beginTransmission(DEVICE); // start transmission to device
  Wire.write(address);             // send register address
  Wire.write(val);                 // send value to write
  Wire.endTransmission();         // end transmission
}

// Reads num bytes starting from address register on device in to _buff array
void readFrom(byte address, int num, byte _buff[]) {
  Wire.beginTransmission(DEVICE); // start transmission to device
  Wire.write(address);             // sends address to read from
  Wire.endTransmission();         // end transmission

  Wire.beginTransmission(DEVICE); // start transmission to device
  Wire.requestFrom(DEVICE, num);    // request 6 bytes from device

  int i = 0;
  while(Wire.available())         // device may send less than requested (abnormal)
  {
    _buff[i] = Wire.read();    // receive a byte
    i++;
  }
  Wire.endTransmission();         // end transmission
}