"""Configure the PN532 to read MiFare cards.""" Return (response, response, response, response) Raise RuntimeError('Failed to detect the PN532! Make sure there is sufficient power (use a 1 amp or greater power supply), the PN532 is wired correctly to the device, and the solder joints on the PN532 headers are solidly connected.')
Response = self.call_function(PN532_COMMAND_GETFIRMWAREVERSION, 4) """Call PN532 GetFirmwareVersion function and return a tuple with the IC, """Initialize communication with the PN532. Raise RuntimeError('Received unexpected command response!') If not (response = PN532_PN532TOHOST and response = (command+1)): # Check that response is for the called function. Response = self._read_frame(response_length+2) # Build frame data with command and parameters. Response is available within the timeout. Will wait up to timeout_secs secondsįor a response and return a bytearray of response bytes, or None if no Note that less than the expected bytes mightīe returned! Params can optionally specify an array of bytes to send as """Send specified command to the PN532 and expect up to response_lengthīytes back in a response. Return responseĭef call_function(self, command, response_length=0, params=, timeout_sec=1): Raise RuntimeError('Response checksum did not match expected value!') # Check frame checksum value matches bytes.Ĭhecksum = reduce(self._uint8_add, response, 0) Raise RuntimeError('Response length checksum did not match length!') Raise RuntimeError('Response contains no data!') Raise RuntimeError('Response frame preamble does not contain 0x00FF!') # Swallow all the 0x00 values that preceed 0xFF. Raise RuntimeError('Response frame does not start with 0x01!') If not (PN532_ACK_FRAME = response.tostring()): # Check frame starts with 0x01 and then has 0x00FF (preceeded by optional # Read frame with expected length of data. Returns the data inside the frame if found, otherwise raises an exception """Read a response frame from the PN532 of at most length bytes in size. """Busy wait for the specified number of milliseconds.""" """Add two values as unsigned 8-bit values.""" r = serial.Serial(uart_port, uart_baudrate, timeout=2000) # Prefixes for NDEF Records (to identify record type) PN532_RESPONSE_INLISTPASSIVETARGET = 0x4B PN532_COMMAND_TGRESPONSETOINITIATOR = 0x90 PN532_COMMAND_TGGETINITIATORCOMMAND = 0x88
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# Permission is hereby granted, free of charge, to any person obtaining a copy # Author: Manuel Fernando Galindo Copyright (c) 2016 Manuel Fernando Galindo # Example of detecting and reading a block from a MiFare NFC card.
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