NXP Semiconductors NTAG I2C plus Bedienungsanleitung

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UM10966

NTAG I²C plus Explorer Kit - Android Demo

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User manual

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Document information

Info

Content

Keywords

NTAG I2C plus, Explorer Kit, Android, NFC tag

Abstract

This User Manual describes the functionalities and how to use the

Android and PC application of the NTAG I2C plus Explorer kit. Both

applications provide the same functionality

and have the same look and

feel so this User Manual is valid for both.

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NTAG I²C plus Explorer Kit - Android Demo

UM10966

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Contact information

For more information, please visit:

http://www.nxp.com

Revision history

Rev

Date

Description

2.1

20170309

Update - Bluetooth Pairing added

2.0

20170201

Updates

1.0

20160216

Initial Version

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1. Object

NTAG I2C plus Explorer kit is an all-in-one demonstration and development resource to

demonstrate the unique properties of the NTAG I2C plus connected tag. By including a

full complement of hardware and software tools, users can investigate the capabilities of

the chip through the various demonstrations, develop and test their own applications

(with additional LPC-Link2 debug probe1).

This User Manual explains how to use the NTAG I2C plus demo application for Android.

The Windows app is not detailed in this User Manual since it provides identical

functionalities as the Android app, therefore the same User Manual is valid.

Technical aspects related to the IC features are beyond the scope of this document. To

get further technical details please consult the dedicated Datasheet “NTAG I2C plus, NFC

Forum Type 2 Tag compliant IC with I2C interface” (refer to [NTAGI2Cplus]).

1www.nxp.com/LPC-LINK2

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2. NTAG I2C plus introduction

The NTAG I2C plus part of NXP’s NTAG family offering both contactless and contact

interfaces. In addition to the passive NFC Forum compliant RF interface, the NTAG I2C

plus provides an I2C interface that allows the IC to communicate with the microcontroller

when the chip is powered by an external device, i.e. a NFC mobile phone.

The NTAG I2C plus operating in energy harvesting mode provides the possibility to

supply external low power devices (e.g. microcontrollers) with the energy generated from

the RF field of the external NFC device.

Fig 1. NTAG I2C plus

The NTAG I2C plus product has two types of memories:

1. EEPROM memory compliant with the NFC Forum Type 2 Tag implementation.

2. 64-byte SRAM memory, which is mapped to the EEPROM memory and it is

externally powered.

The NTAG I2C plus features a pass-through mode that allows fast download and upload

of data from the RF interface to the I2C interface and vice versa. This functionality makes

use of the SRAM memory that allows fast data transfer between interfaces without the

EEPROM performance limitations.

In addition to the I2C interface functionality, the NTAG I2C plus product features an Event

Detection pin for waking up the connected host devices or synchronizing the data

transfer between the two interfaces.

The NTAG I2C plus offers the possibility to protect the memory access. This protection is

done by authenticating the tag with a password. When the tag is protected,

authentication is needed to access the memory. The NTAG I2C plus also improves the

speed when writing into the SRAM memory.

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3. NTAG I2C plus Explorer kit contents

The NTAG I2C plus Explorer kit (NEK) consists of hardware and software tools that

developers can use to understand the NXP NTAG I2C plus functionalities and create first

prototypes to demonstrate its potential for other application. The kit includes:

3.1 Hardware components

3.1.1 NTAG I2C plus Explorer Board

A hardware board based on the NXP LPC 11U24 microcontroller (refer to [LPC11U24]),

with on-board LCD display, NXP LM75B temperature sensor (refer to [LM75B]), voltage

monitors, I2C serial bus connector, JTAG/SWD debug connector, RGD LED micro USB

connector and five push buttons.

Fig 2. NTAG I2C plus Explorer Board (refer to [EXPLORER])

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3.1.2 Antenna board

The antenna board carries the NTAG I2C plus 2k version itself and provides two

interfaces:

•The RF interface to an NFC device.

•The I2C interface to the host, e.g. the NTAG I2C plus Explorer board.

The design files for both the PCB and Flex antenna can be found on the web page (refer

to [PCB Antenna]and [Flex Antenna]

Fig 3. PCB and Flex antenna boards with NTAG I²C plus IC

3.1.3 Field detector board

The position of the antenna of NFC devices vary from device to device. To use the

Explorer Kit with an NFC Device, NFC radio needs to be enabled. To find the position of

the antenna, it is convenient to use the included field detector board. The LED helps to

find the antenna position.

Design files may be downloaded from the demo board homepage (refer to [Field

Detector])

Fig 4. Field detector board

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3.1.4 USB reader

Instead of a NFC device, the USB (PCSC) reader (Identiv uTrust CLOUD 3700F) may be

used in combination with the Windows app to develop applications.

Fig 5. Identiv uTrust CLOUD 3700F reader

To install the reader, download latest driver from the web page (refer to [Identiv]), extract

“Identiv uTrust Installer.zip” and install it with no reader connected.

In Windows 7 operative systems, when a smartcard is placed over the reader there is

frequently an issue regarding the smartcard mini-drivers. Although a solution to this

problem is given in this section, more information can be found on the Windows Support

Webpage2. To solve this issue the Smart Card Plug has to be disabled and Play in local

Group Policy has to be changed to primary group policy settings for smart cards. The

procedure is as follows:

1. Click Start, type gpedit.msc in the Search programs and files box, and then

press ENTER.

2. In the console tree under Computer Configuration, click Administrative

Templates.

3. In the details pane, double-click Windows Components, and then double-

click Smart Card.

4. Right-click Turn on Smart Card Plug and Play service, and then click Edit.

5. Click Disabled, and then click OK.

6. Click Start, type regedit.exe in the Search programs and files box, and then

press ENTER.

7. Go through the tree key, on the left, up to the key

•HKEY_LOCAL_MACHINE \ Software \ Microsoft \ Cryptography \

Calais for 32-bit system or

•HKEY_LOCAL_MACHINE \ SOFTWARE \ Wow6432Node \ Microsoft \

Cryptography \ Calais for 64-bit system

8. Add a new DWORD value named CardDisconnectPowerDownDelay and set its

value to 0.

9. Click Start, type services.msc in the Search programs and files box, and then

press ENTER.

10. Find the smart card service in the list, right-click and click Restart.

11. Now you may plug the reader

2https://support.microsoft.com/en-us/kb/976832.

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3.1.4.1 USB Reader firmware update

In some cases, reader is not functioning properly with Windows “NTAG I²C plus Demo”

application. This is due to newer Reader´s firmware. In this case, it needs to be updated,

using patch tool3.

3.2 Software components

3.2.1 NTAG I2C plus Explorer board firmware

The firmware runs on the NTAG I2C plus Explorer board and is flashed during production

at the MCU which supports the demonstration functionality of the hardware. The

delivered NTAG I2C plus Explorer board firmware consists of three applications:

•NTAG_I2C_Explorer_Bootloader: This project implements the secondary

bootloader application. It is flashed at on-chip memory address starting at

0x0000 0000 and it is the first application to be executed after the MCU boots.

This application has three functions:

oJump to the start memory of the user application.

oEnter into flashing mode functionality.

oEnter into USB mode (Peek and Poke).

•NTAG_I2C_Explorer_Demo: This project implements the logic supporting the

Android / Windows demonstration applications. It is flashed at on-chip flash

memory starting at 0x0000 4000 address and it is executed after the bootloader

jumps to the application start address.

•NTAG_I2C_Explorer_Blink: This is a sample project that sets into blinking mode

the NTAG_I2C Explorer board as soon as the RF field is detected. This

application is provided to illustrate the NFC flashing functionality and its binary

image is provided embedded by default into the Android app (see Section 4.5).

3.2.2 Android app

The demo application on an Android NFC phone (“NFC mobile”) showcasing the various

features of the NTAG I2C plus. The NTAG I2C Demo application is available for download

from the public NXP website as well as at Google Play.

3http://www.nxp.com/demoboard/OM5569-NT322ER/documents/software/SW4044.zip

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Fig 6. Android app GUI

Note: The UM10989 (refer to [UM10989]) describes in detail how to get started with the

development of Android Applications.

3.2.3 Windows app

Together with the USB reader, the Windows app can be utilized to substitute a missing

NFC mobile phone. The Windows app has similar functionalities as the Android app. This

software component is available as a download from the public NXP website. The

software will include a setup file which will install the Windows App in the folder ‘Program

files/NXP Semiconductors’, this installation process will create a shortcut to the Windows

App on your desktop. No further procedure is required to run this application.

1. Download the NTAG I2C Demo App (refer to [PC App])

2. If not done, install the Identiv uTrust driver as described above and the NTAG I2C

Demo App

3. Launch the NTAG I2C Demo App

There are some points to consider when using the Windows App, since it is connected to

an external reader via USB. There are sometimes issues with the connection between

the reader and the tag. On these cases, it is recommended to restart the app and re-plug

the reader.

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Fig 7. Windows application GUI

Note: The Windows application functionalities, GUI and look and feel are intentionally

made the same as the Android application. The Windows application is intended to run in

a Windows environment together with the Identiv uTrust CLOUD 3700F reader as a

substitute in case an NFC phone is not available. Therefore, this User Manual is valid for

both the Android app and Windows application. However, only Android app screenshots

are shown in this document.

3.2.4 Peek and Poke GUI

The Peek and Poke GUI is a Windows app that can be used to examine the detailed

memory contents of the NTAG I2C plus EEPROM via I2C interface. From hardware point

of view only a USB cable connection from the board to the PC is needed (no need of the

USB NFC reader). This software component is available as a download from the public

NXP website (refer to [Peek&Poke]).

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