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1#!/usr/bin/python
2# Author: Jon Trulson <jtrulson@ics.com>
3# Copyright (c) 2015 Intel Corporation.
4#
5# Permission is hereby granted, free of charge, to any person obtaining
6# a copy of this software and associated documentation files (the
7# "Software"), to deal in the Software without restriction, including
8# without limitation the rights to use, copy, modify, merge, publish,
9# distribute, sublicense, and/or sell copies of the Software, and to
10# permit persons to whom the Software is furnished to do so, subject to
11# the following conditions:
12#
13# The above copyright notice and this permission notice shall be
14# included in all copies or substantial portions of the Software.
15#
16# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23
24import time, sys, signal, atexit
25import pyupm_pn532 as upmPn532
26
27# Instantiate an PN532 on I2C bus 0 (default) using gpio 3 for the
28# IRQ, and gpio 2 for the reset pin.
29myNFC = upmPn532.PN532(3, 2)
30
31## Exit handlers ##
32# This stops python from printing a stacktrace when you hit control-C
33def SIGINTHandler(signum, frame):
34	raise SystemExit
35
36# This lets you run code on exit
37def exitHandler():
38	print "Exiting"
39	sys.exit(0)
40
41# Register exit handlers
42atexit.register(exitHandler)
43signal.signal(signal.SIGINT, SIGINTHandler)
44
45
46if (not myNFC.init()):
47	print "init() failed"
48	sys.exit(0)
49
50vers = myNFC.getFirmwareVersion()
51
52if (vers):
53	print "Got firmware version: %08x" % vers
54else:
55	print "Could not identify PN532"
56	sys.exit(0)
57
58# Now scan and identify any cards that come in range (1 for now)
59
60# Retry forever
61myNFC.setPassiveActivationRetries(0xff)
62
63myNFC.SAMConfig()
64
65uidSize = upmPn532.uint8Array(0)
66uid = upmPn532.uint8Array(7)
67
68# the URL we want to add as an NDEF record
69# NOTE: this cannot exceed 34 characters.
70url = "iotdk.intel.com"
71
72foundCard = False
73
74while (not foundCard):
75	for i in range(7):
76		uid.__setitem__(i, 0)
77	if (myNFC.readPassiveTargetID(upmPn532.PN532.BAUD_MIFARE_ISO14443A,
78                                      uid, uidSize, 2000)):
79		# found a card
80		print "Found a card: UID len", uidSize.__getitem__(0)
81		print "UID: ",
82		for i in range(uidSize.__getitem__(0)):
83			print "%02x" % uid.__getitem__(i),
84		print
85		print "SAK: %02x" % myNFC.getSAK()
86		print "ATQA: %04x" % myNFC.getATQA()
87                print
88                foundCard = True
89	else:
90		print "Waiting for a card...\n"
91
92if (uidSize.__getitem__(0) != 7):
93        print "This example will only write an NDEF URI to preformatted"
94        print "Mifare Ultralight or NTAG2XX tags"
95        sys.exit(1)
96
97# 48 bytes is maximum data area on ultralight cards, so we use that
98# as the maximum datasize here.  Obviously if you have a bigger
99# card, you can write more data.
100if (not myNFC.ntag2xx_WriteNDEFURI(upmPn532.PN532.NDEF_URIPREFIX_HTTP, url, 48)):
101        # failure
102        print "Failed to write NDEF record tag."
103        sys.exit(1)
104
105print "Success, URL record written to tag."
106