nfc controller interface 安卓技术指导

This document provides guidelines for the integration of NXP NCI based NFC Controller

to an Android platform from software perspective.

It first explains how install the required kernel driver, then it describes step by step how to

adapt the Android Open Source Project sources from the NXP-NCI Android NFC

package delivery. Fig 1 shows the architecture of the Android NFC stack.

NFC Controller hardware resource.

specific Hardware Abstraction Layer.

is added to support NXP proprietary features (e.g. support for MIFARE Classic).

related additional interface.

functionality. Extension is delivered to support NXP proprietary features.

The PN5xx I2C driver offers communication to the NFC Controller connected over I2C

physical interface. This is insured through the device node named /dev/pn544. This low-

The following instructions assume the driver being installed under the drivers/misc kernel

source sub-folder. Below instructions may have to be adapted accordingly in case

another path is chosen for the driver installation.

This will create the sub-folder nxp-pn5xx containing the following files:

Two methods are supported for the creation of the /dev/pn544 device node: device tree

and platform data. Any of the two methods can be used, but of course the I2C address

(0x28 in the below examples) and GPIO assignments must be adapted to the hardware

integration in the platform.

2.2.3.1 Device tree

Below is an example of definition to be added to the platform device tree file (.dts file

located for instance under arch/arm/boot/dts kernel sub-folder for ARM based platform).