1 /* 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 25 #include <unistd.h> 26 #include <iostream> 27 #include "m24lr64e.h" 28 29 using namespace std; 30 using namespace upm; 31 32 int main(int argc, char **argv) 33 { 34 //! [Interesting] 35 // Instantiate an M24LR64E on I2C bus 0 36 37 upm::M24LR64E *nfcTag = new upm::M24LR64E(M24LR64E_I2C_BUS); 38 39 // This example accesses the device in the 'user' (default) mode, 40 // reads the last byte of data in the EEPROM, inverts it, writes 41 // it back, and then re-reads it. 42 43 // Read the last byte of the EEPROM area 44 45 int addr = M24LR64E::EEPROM_I2C_LENGTH - 1; 46 printf("Address: %d\n", addr); 47 uint8_t byte = nfcTag->readByte(addr); 48 printf("Read byte: %02x\n", byte); 49 50 // Now change it to it's opposite and write it 51 byte = ~byte; 52 nfcTag->writeByte(addr, byte); 53 printf("Wrote inverted byte: %02x\n", byte); 54 55 // Now read it back. 56 byte = nfcTag->readByte(addr); 57 printf("Read byte: %02x\n", byte); 58 59 //! [Interesting] 60 61 cout << "Exiting..." << endl; 62 63 delete nfcTag; 64 return 0; 65 } 66
