uart support

examples/main.py

@@ -1,4 +1,36 @@
-ush=True)
+from Adafruit_Circuitpython_PN532 import adafruit_pn532
+from digitalio import DigitalInOut, Direction, Pull
+import board
+import time
+import busio
+
+reset_pin = DigitalInOut(board.D3)
+
+
+# I2C connection:
+#i2c = busio.I2C(board.SCL, board.SDA)
+#pn532 = adafruit_pn532.PN532_I2C(i2c, debug=False, reset=reset_pin)
+
+# SPI connection:
+#spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
+#cs_pin = DigitalInOut(board.D2)
+#pn532 = adafruit_pn532.PN532_SPI(spi, cs_pin, debug=False, reset=reset_pin)
+
+# UART connection
+#uart = busio.UART(board.TX, board.RX, baudrate=115200, timeout=100)
+#pn532 = adafruit_pn532.PN532_UART(uart, debug=False, reset=reset_pin)
+
+ic, ver, rev, support = pn532.get_firmware_version()
+print('Found PN532 with firmware version: {0}.{1}'.format(ver, rev))
+
+# Configure PN532 to communicate with MiFare cards 
+pn532.SAM_configuration()
+
+print('Waiting for MiFare card...')
+while True:
+    # Check if a card is available to read
+    uid = pn532.read_passive_target(timeout=0.25)
+    print('.', end="", flush=True)
     # Try again if no card is available.
     if uid is None:
         continue