1 #!/usr/bin/python 2 # Author: Jon Trulson <jtrulson (at] 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 24 import sys 25 import pyupm_m24lr64e as nfcTagObj 26 27 # Instantiate a M24LR64E Grove NFC Tag Module on UART 0 28 nfcTag = nfcTagObj.M24LR64E(nfcTagObj.M24LR64E_I2C_BUS) 29 30 # This example accesses the device in the 'user' (default) mode, 31 # reads the last byte of data in the EEPROM, inverts it, writes 32 # it back, and then re-reads it. 33 34 # Read the last byte of the EEPROM area 35 addr = (nfcTagObj.M24LR64E.EEPROM_I2C_LENGTH - 1) 36 print "Address: ", addr 37 byte = nfcTag.readByte(addr) 38 39 print "Read byte: ", format(byte, '02x') 40 41 # Now change it to it's opposite and write it 42 byte = (~byte & 0xff) 43 nfcTag.writeByte(addr, byte) 44 print "Wrote inverted byte: ", format(byte, '02x') 45 46 # Now read it back. 47 byte = nfcTag.readByte(addr) 48 print "Read byte: ", format(byte, '02x') 49 50
