NFC Reader with RaspberryPi GPIO
If you read my postings about NFC Reader, you know that I use an USB TTL module for the communication with my NFC Reader (UART mode). If you don't own such a module, it's not a big problem to connect the reader with GPIO pins of your RaspberryPi.
How?
Change /boot/cmdline.txt, from:
dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1
to
dwc_otg.lpm_enable=0 console=tty1
Change /etc/inittab, from:
#Spawn a getty on Raspberry Pi serial line
T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100
T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100
to
#Spawn a getty on Raspberry Pi serial line
#T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100
#T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100
Reboot your Pi.
Connect the Reader with following PINs:
GND -> PIN 6
TxD -> PIN 10 (= GPIO 15)
RxD -> PIN 8 (= GPIO 14)
VCC -> PIN 1 (3,3V) or PIN2 (5,5V)
TxD -> PIN 10 (= GPIO 15)
RxD -> PIN 8 (= GPIO 14)
VCC -> PIN 1 (3,3V) or PIN2 (5,5V)
Use serial port with the name /dev/ttyAMA0 for RxTx and configure RxTx e.g. -Dgnu.io.rxtx.SerialPorts=/dev/ttyAMA0.
Successfully tested with eNFC.
Development | rjahn | 04/01/2013 | 
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