root / toolbox / rfid.h @ 12ea39cc
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1 | 9b2b6d91 | Tom Mullins | #ifndef RFID_H
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2 | #define RFID_H
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3 | |||
4 | /* First byte back from rfid reader */
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5 | #define RFID_OK 1 |
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6 | |||
7 | /* Bytes in serial number on rfid tags */
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8 | #define RFID_SERNO_SIZE 4 |
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9 | |||
10 | /* In rfid_read_safe, it must read the same value RFID_MIN_OK times. If it
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11 | * encounters RFID_MAX_ERRS read errors first, it will output all 0's. */
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12 | #define RFID_MAX_ERRS 10 |
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13 | #define RFID_MIN_OK 5 |
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14 | |||
15 | /* Should be called before anything else */
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16 | void rfid_init();
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17 | |||
18 | 12ea39cc | Tom Mullins | /* Reads the serial number of an rfid tag into an internal buffer, accessible
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19 | 9b2b6d91 | Tom Mullins | * with rfid_get_serno */
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20 | void rfid_read();
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21 | |||
22 | /* Attempts to read the serial number multiple times, and only accepts it if it
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23 | * is the same every time. Use rfid_read instead until this one is proven
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24 | * necessary */
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25 | void rfid_read_safe();
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26 | |||
27 | /* Call this only after calling rfid_read. This will copy the value it read
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28 | * into serno, which should be at least RFID_SERNO_SIZE bytes */
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29 | void rfid_get_serno(char *serno); |
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30 | |||
31 | 12ea39cc | Tom Mullins | /* Call this only after calling rfid_read. Returns 1 if serno matches the
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32 | * internal buffer of the most recently read serial number */
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33 | char rfid_check_serno(char *serno); |
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34 | |||
35 | /* Call this only after calling rfid_read. Returns 1 if the internal buffer is
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36 | * nonzero, meaning a serial number was successfully read from an rfid tag */
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37 | char rfid_nonzero();
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38 | |||
39 | 9b2b6d91 | Tom Mullins | #endif |