50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
"""
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This example shows connecting to the PN532 with I2C (requires clock
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stretching support), SPI, or UART. SPI is best, it uses the most pins but
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is the most reliable and universally supported.
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After initialization, try waving various 13.56MHz RFID cards over it!
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"""
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import board
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import busio
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from digitalio import DigitalInOut
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from Adafruit_Circuitpython_PN532 import adafruit_pn532
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# I2C connection:
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i2c = busio.I2C(board.SCL, board.SDA)
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# Non-hardware
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#pn532 = adafruit_pn532.PN532_I2C(i2c, debug=False)
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# With I2C, we recommend connecting RSTPD_N (reset) to a digital pin for manual
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# harware reset
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reset_pin = DigitalInOut(board.D6)
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# On Raspberry Pi, you must also connect a pin to P32 "H_Request" for hardware
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# wakeup! this means we don't need to do the I2C clock-stretch thing
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req_pin = DigitalInOut(board.D12)
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pn532 = adafruit_pn532.PN532_I2C(i2c, debug=False, reset=reset_pin, req=req_pin)
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# SPI connection:
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#spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
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#cs_pin = DigitalInOut(board.D5)
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#pn532 = adafruit_pn532.PN532_SPI(spi, cs_pin, debug=False)
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# UART connection
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#uart = busio.UART(board.TX, board.RX, baudrate=115200, timeout=100)
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#pn532 = adafruit_pn532.PN532_UART(uart, debug=False)
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ic, ver, rev, support = pn532.get_firmware_version()
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print('Found PN532 with firmware version: {0}.{1}'.format(ver, rev))
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# Configure PN532 to communicate with MiFare cards
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pn532.SAM_configuration()
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print('Waiting for RFID/NFC card...')
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while True:
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# Check if a card is available to read
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uid = pn532.read_passive_target(timeout=0.5)
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print('.', end="", flush=True)
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# Try again if no card is available.
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if uid is None:
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continue
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print('Found card with UID:', [hex(i) for i in uid])
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