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50 lines
1.9 KiB
Python
50 lines
1.9 KiB
Python
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#!/usr/bin/python
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# Author: Jon Trulson <jtrulson@ics.com>
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# Copyright (c) 2015 Intel Corporation.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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import sys
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import pyupm_m24lr64e as nfcTagObj
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# Instantiate a M24LR64E Grove NFC Tag Module on UART 0
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nfcTag = nfcTagObj.M24LR64E(nfcTagObj.M24LR64E_I2C_BUS)
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# This example accesses the device in the 'user' (default) mode,
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# reads the last byte of data in the EEPROM, inverts it, writes
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# it back, and then re-reads it.
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# Read the last byte of the EEPROM area
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addr = (nfcTagObj.M24LR64E.EEPROM_I2C_LENGTH - 1)
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print "Address: ", addr
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byte = nfcTag.readByte(addr)
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print "Read byte: ", format(byte, '02x')
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# Now change it to it's opposite and write it
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byte = (~byte & 0xff)
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nfcTag.writeByte(addr, byte)
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print "Wrote inverted byte: ", format(byte, '02x')
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# Now read it back.
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byte = nfcTag.readByte(addr)
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print "Read byte: ", format(byte, '02x')
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