ID12 RFID library for reading 125KHz RFID tags
Dependents: ID12RFID_HelloWorld MyFinalDerbot RFID_CatDoor TweetRFID ... more
ID12RFID.cpp
- Committer:
- simon
- Date:
- 2010-11-23
- Revision:
- 1:f04afa911cf5
- Parent:
- 0:049d572aefe1
File content as of revision 1:f04afa911cf5:
/* mbed ID12 RFID Library * Copyright (c) 2007-2010, sford, http://mbed.org * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "ID12RFID.h" #include "mbed.h" ID12RFID::ID12RFID(PinName rx) : _rfid(NC, rx) { } int ID12RFID::readable() { return _rfid.readable(); } int ID12RFID::read() { while (_rfid.getc() != 2); int v = 0; _rfid.getc(); // drop 1st 2 bytes - we actually only read the lower 32-bits of the code _rfid.getc(); for (int i=7; i>=0; i--) { char c = _rfid.getc(); // a ascii hex char int part = c - '0'; v |= part << (i * 4); } for (int i=0; i<5; i++) { _rfid.getc(); } return v; }