Changes between Version 6 and Version 7 of KyoshoICserialcom


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Timestamp:
10/27/09 10:33:04 (15 years ago)
Author:
pinwc4
Comment:

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  • KyoshoICserialcom

    v6 v7  
    11 
    2 == Kyosho IC lap counter communication overview == 
     2= Kyosho IC lap counter communication overview = 
    33 
    44The Kyosho IC lap counter is based on the Melexis 90121 RFID chip with an Atmel microcontroller.  In order to communicate with this RFID reader you must set your serial device to 38400 baud, 8 data bits, 1 stop bit, no parity.  
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    66 
    7 == Automatic Polling Mode == 
     7= Automatic Polling Mode = 
    88 
    99The Kyosho IC lap counter hardware is capable of automatically polling for RFID's and returning the results without sending repeated inventory commands.  Unfortunately this mode does not return the UID, instead it returns the data written to block 1 (data begins at block 0) of the RFID.  Block 0 and block 2 must also be populated with information for this mode to work.  Each tag must have unique data in block 1 for this mode to work correctly.  When [wiki:KyoshoICserialcom#Taginitialization initializing] the tag you can ensure that it has unique data in block 1 by using the last 4 bytes of the UID as the data.  The following is an example of data that could be stored to the first 3 blocks for this mode to work: 
    … …  
    4141 
    4242 
    43 == Checksum == 
     43= Checksum = 
    4444 
    4545The checksum for the Kyosho IC lap counter is just a simple XOR operation on all the bytes of the packet.  
    4646 
    47 == Tag Initialization == 
     47= Tag Initialization = 
    4848 
    4949Remember to initialize the tag if using automatic polling mode.