1/*jslint node:true, vars:true, bitwise:true, unparam:true */ 2/*jshint unused:true */ 3 4/* 5* Author: Jon Trulson <jtrulson@ics.com> 6* Copyright (c) 2015 Intel Corporation. 7* 8* Permission is hereby granted, free of charge, to any person obtaining 9* a copy of this software and associated documentation files (the 10* "Software"), to deal in the Software without restriction, including 11* without limitation the rights to use, copy, modify, merge, publish, 12* distribute, sublicense, and/or sell copies of the Software, and to 13* permit persons to whom the Software is furnished to do so, subject to 14* the following conditions: 15* 16* The above copyright notice and this permission notice shall be 17* included in all copies or substantial portions of the Software. 18* 19* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 22* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 23* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 24* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26*/ 27 28// Load PN532 module 29var pn532 = require('jsupm_pn532'); 30 31// Instantiate an PN532 on I2C bus 0 (default) using gpio 3 for the 32// IRQ, and gpio 2 for the reset pin. 33var myNFCObj = new pn532.PN532(3, 2); 34 35function writeUrl() 36{ 37 if (uidSize.getitem(0) != 7) 38 { 39 console.log("This example will only write an NDEF URI to preformatted"); 40 console.log("Mifare Ultralight or NTAG2XX tags"); 41 exit(); 42 } 43 44 // 48 bytes is maximum data area on ultralight cards, so we use that 45 // as the maximum datasize here. Obviously if you have a bigger 46 // card, you can write more data. 47 if (!myNFCObj.ntag2xx_WriteNDEFURI(pn532.PN532.NDEF_URIPREFIX_HTTP, 48 url, 48)) 49 { 50 // failure 51 console.log("Failed to write NDEF record tag."); 52 exit(1); 53 } 54 55 console.log("Success, URL record written to tag."); 56} 57 58function toHex(d, pad) 59{ 60 // pad should be between 1 and 8 61 return ("00000000"+(Number(d).toString(16))).slice(-pad) 62} 63 64function exit() 65{ 66 clearInterval(myInterval); 67 myNFCObj = null; 68 pn532.cleanUp(); 69 pn532 = null; 70 console.log("Exiting"); 71 process.exit(0); 72} 73 74// When exiting: clear interval, and print message 75process.on('SIGINT', function() 76{ 77 exit(); 78}); 79 80// "main" 81if (!myNFCObj.init()) 82 console.log("init() failed"); 83 84var vers = myNFCObj.getFirmwareVersion(); 85 86if (vers) 87 console.log("Got firmware version: " + toHex(vers, 8)); 88else 89{ 90 console.log("Could not identify PN532"); 91 exit(); 92} 93 94// Now scan and identify any cards that come in range (1 for now) 95 96// Retry forever 97myNFCObj.setPassiveActivationRetries(0xff); 98 99myNFCObj.SAMConfig(); 100 101var uidSize = new pn532.uint8Array(0); 102var uid = new pn532.uint8Array(7); 103 104// the URL we want to add as an NDEF record 105// NOTE: this cannot exceed 34 characters. 106url = "iotdk.intel.com"; 107 108var myInterval = setInterval(function() 109{ 110 for (var x = 0; x < 7; x++) 111 uid.setitem(x, 0); 112 if (myNFCObj.readPassiveTargetID(pn532.PN532.BAUD_MIFARE_ISO14443A, 113 uid, uidSize, 2000)) 114 { 115 // found a card 116 console.log("Found a card: UID len " + uidSize.getitem(0)); 117 process.stdout.write("UID: "); 118 for (var i = 0; i < uidSize.getitem(0); i++) 119 { 120 var byteVal = uid.getitem(i); 121 process.stdout.write(toHex(byteVal, 2) + " "); 122 } 123 process.stdout.write("\n"); 124 console.log("SAK: " + toHex(myNFCObj.getSAK(), 2)); 125 console.log("ATQA: " + toHex(myNFCObj.getATQA(), 4)); 126 console.log(" "); 127 128 // write the URL 129 writeUrl(); 130 clearInterval(myInterval); 131 return; 132 } 133 else 134 console.log("Waiting for a card..."); 135}, 1000); 136 137