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

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

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  1. eshwartamil


    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. aishiqi


    Jan 4, 2011
    i also want to study mifare card.
  3. poor mystic

    poor mystic

    Apr 8, 2011
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