#include "SPI.h"

void setup ()
{
  SPI.begin();
  SPI.setBitOrder(MSBFIRST);
  SPI.setDataMode (SPI_MODE1) ;
}

void loop ()
{
  unsigned int result = 0;
  unsigned int result1 = 0;
  unsigned int result2 = 0;

  digitalWrite(SS, LOW);

  //Reading 8 bit frame (the first half of 16-bit SPI transfer)
  result1 = SPI.transfer(0b00000000);

  // removing (masking) first 2 bit
  result1 &= 0b00111111;

  //shifting 8 bit to left. to create emty space for last 8 bit transfer
  result1 = result1 << 8;

  // getting last 8 bits (the last half of 16-bit SPI transfer)
  result2 = SPI.transfer(0b00000000);

  // merging
  result = result1 | result2;
}