NFC
Это утверждённая версия страницы. Она же — наиболее свежая версия.
Hardware
NXP chip is used PN532/en. The chip is connected via SPI. GPIO is used as chip select.
Software
The chip is supported by the library libnfc, starting with release 1.7.0. Backport to Debian Wheezy: [1], by default in a standard way.
Work is done in userspace using spidev. By default when using the default dts file using device /dev/spidev1.4. Default config: [2].
Examples
The list of cards in the scope area
root@wirenboard:~# nfc-list nfc-list uses libnfc 1.7.0 NFC device: pn532_spi:/dev/spidev1.4 opened 1 ISO14443A passive target(s) found: ISO/IEC 14443A (106 kbps) target: ATQA (SENS_RES): 00 44 UID (NFCID1): 04 f7 04 1a 0d 28 86 SAK (SEL_RES): 00
Reading Mifare Ultralight
One-time tickets of the Moscow metro -Mifare UL cards.
root@wirenboard:~# nfc-mfultralight r dump.mfd NFC device: pn532_spi:/dev/spidev1.4 opened Found MIFARE Ultralight card with UID: 04f7041a0d2886 Reading 16 pages |................| Done, 16 of 16 pages readed. Writing data to file: dump.mfd ... Done.
Python
To work with NFC from Python, you need to use bindings for libnfc. See example https://github.com/contactless/wirenboard/tree/master/examples/nfc/python on github.
C/C++
Examples of working with libnfc in utilities provided with libnfc: http://code.google.com/p/libnfc/source/browse/#git%2Fexamples