Doug Anson / ID12RFID

modified ID12RFID library to allow for tx pin setting

Fork of ID12RFID by Simon Ford

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

        

        
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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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}