text: /*
   * Author: Jon Trulson <jtrulson@ics.com>
   * Copyright (c) 2015 Intel Corporation.
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
   * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  
  var nfcTagObj = require('jsupm_m24lr64e');
  
  // Instantiate a M24LR64E Grove NFC Tag Module on UART 0
  var nfcTag = new nfcTagObj.M24LR64E(nfcTagObj.M24LR64E_I2C_BUS);
  
  // This example accesses the device in the 'user' (default) mode,
  // reads the last byte of data in the EEPROM, inverts it, writes
  // it back, and then re-reads it.
  
  // Read the last byte of the EEPROM area
  var addr = (nfcTagObj.M24LR64E.EEPROM_I2C_LENGTH - 1);
  console.log("Address: " + addr);
  var byte = nfcTag.readByte(addr);
  
  console.log("Read byte: " + byte.toString(16));
  
  // Now change it to it's opposite and write it
  byte = (~byte & 0xff);
  nfcTag.writeByte(addr, byte);
  console.log("Wrote inverted byte: " + byte.toString(16));
  
  // Now read it back.
  byte = nfcTag.readByte(addr);
  console.log("Read byte: " + byte.toString(16));
  
  // clean up
  nfcTag = null;
  nfcTagObj.cleanUp();
  nfcTagObj = null;
  console.log("Exiting...");
  process.exit(0);
  