ID12 RFID library for reading 125KHz RFID tags
Dependents: ID12RFID_HelloWorld MyFinalDerbot RFID_CatDoor TweetRFID ... more
Revision 0:049d572aefe1, committed 2010-06-03
- Comitter:
- simon
- Date:
- Thu Jun 03 13:24:04 2010 +0000
- Child:
- 1:f04afa911cf5
- Commit message:
Changed in this revision
ID12RFID.cpp | Show annotated file Show diff for this revision Revisions of this file |
ID12RFID.h | Show annotated file Show diff for this revision Revisions of this file |
--- /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; +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ID12RFID.h Thu Jun 03 13:24:04 2010 +0000 @@ -0,0 +1,73 @@ +/* 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. + */ + +#ifndef MBED_ID12RFID_H +#define MBED_ID12RFID_H + +#include "mbed.h" + +/** An interface for the ID-12 RFID reader device + * + * @code + * // Print RFID tag numbers + * + * #include "mbed.h" + * #include "ID12RFID.h" + * + * ID12RFID rfid(p10); // serial rx + * + * int main() { + * while(1) { + * if(rfid.readable()) { + * printf("RFID Tag number : %d\n", rfid.read()); + * } + * } + * } + * @endcode + */ +class ID12RFID { + +public: + /** Create an ID12 RFID interface, connected to the specified Serial rx port + * + * @param rx Recieve pin + */ + ID12RFID(PinName rx); + + /** Non blocking function to determine if an ID has been received + * + * @return Non zero value when the device is readable + */ + int readable(); + + /** A blocking function that will return a tag ID when available + * + * @return The ID tag value + */ + int read(); + +private: + Serial _rfid; + +}; + +#endif