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Problem in Reading Data from smart card frequently....????

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Discussion in 'Microcontrollers, Programming and IoT' started by eshwartamil, Jun 1, 2011.

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  1. Jun 1, 2011 #1
    eshwartamil

    eshwartamil

    1
    0
    Jun 1, 2011
    Hi to all........





    I am using TDA8007B with a microcontroller 8xc51 to interface with MIFARE smart card and this unit is connected with my PC via RS232. I have written a code to send a APDU to the card and get a response from the card.I have given a Command to get a version of the MIFARE card.For the first time only it returns the correct information. when i am trying to give the same command for the next times it returns null.I have checked the parity error,ATR sequence. these are all working fine. I cant be able to find out a problem... please help me... its very urgent...
     
  2. Jun 2, 2011 #2
    aishiqi

    aishiqi

    9
    0
    Jan 4, 2011
    i also want to study mifare card.
     
  3. Jun 4, 2011 #3
    poor mystic

    poor mystic

    1,068
    31
    Apr 8, 2011
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