ID12 RFID library for reading 125KHz RFID tags
Dependents:
ID12RFID_HelloWorld
MyFinalDerbot
RFID_CatDoor
TweetRFID
... more
ID12RFID.cpp@0:049d572aefe1, 2010-06-03 (annotated)
- Committer:
- simon
- Date:
- Thu Jun 03 13:24:04 2010 +0000
- Revision:
- 0:049d572aefe1
- Child:
- 1:f04afa911cf5
Who changed what in which revision?
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| simon |
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/* mbed ID12 RFID Library
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* Copyright (c) 2007-2010, sford
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "ID12RFID.h"
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#include "mbed.h"
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ID12RFID::ID12RFID(PinName rx)
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: _rfid(NC, rx) {
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}
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int ID12RFID::readable() {
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return _rfid.readable();
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}
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int ID12RFID::read() {
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while (_rfid.getc() != 2);
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int v = 0;
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_rfid.getc(); // drop 1st 2
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_rfid.getc();
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for (int i=7; i>=0; i--) {
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char c = _rfid.getc(); // a ascii hex char
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int part = c - '0';
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v |= part << (i * 4);
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}
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for (int i=0; i<5; i++) {
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_rfid.getc();
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}
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return v;
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}
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Simon Ford
ID12 RFID Reader