Module: MIFARE::UltralightEV1

Defined in:
lib/mifare/ultralight_ev1.rb

Instance Method Summary collapse

Instance Method Details

#auth(passwd) ⇒ Object 



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# File 'lib/mifare/ultralight_ev1.rb', line 3

def auth(passwd)
  passwd_bytes = [passwd].pack('H*').bytes
  if passwd_bytes.size != 4
    raise UsageError, "Expect 4 bytes password in hex, got: #{passwd_bytes.size} byte"
  end

  transceive([CMD_PWD_AUTH, *passwd_bytes])
end

#authed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mifare/ultralight_ev1.rb', line 12

def authed?
  @authed || false
end

#counter_torn?(counter) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mifare/ultralight_ev1.rb', line 32

def counter_torn?(counter)
  transceive([CMD_CHECK_TEARING_EVENT, counter]) != 0xBD
end

#fast_read(from, to) ⇒ Object 



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# File 'lib/mifare/ultralight_ev1.rb', line 16

def fast_read(from, to)
  if (to - from + 1) > @max_range
    raise UsageError, "Reading from #{from} to #{to} exceeds PCD receive buffer"
  end

  transceive([CMD_FAST_READ, from, to])
end

#increment_counter(counter) ⇒ Object 



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# File 'lib/mifare/ultralight_ev1.rb', line 28

def increment_counter(counter)
  transceive([CMD_INCR_CNT, counter])
end

#read_counter(counter) ⇒ Object 



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# File 'lib/mifare/ultralight_ev1.rb', line 24

def read_counter(counter)
  transceive([CMD_READ_CNT, counter])
end

#read_signature ⇒ Object 



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# File 'lib/mifare/ultralight_ev1.rb', line 36

def read_signature
  transceive([CMD_READ_SIG, 0x00])
end