ID12 RFID library for reading 125KHz RFID tags
Dependents: ID12RFID_HelloWorld MyFinalDerbot RFID_CatDoor TweetRFID ... more
Diff: ID12RFID.cpp
- Revision:
- 0:049d572aefe1
- Child:
- 1:f04afa911cf5
diff -r 000000000000 -r 049d572aefe1 ID12RFID.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ID12RFID.cpp Thu Jun 03 13:24:04 2010 +0000 @@ -0,0 +1,53 @@ +/* mbed ID12 RFID Library + * Copyright (c) 2007-2010, sford + * + * 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 + _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; +}