NXP Semiconductors FRDM-KW41Z User guide

UM10950
Start-up Guide for FRDM-KW41Z Evaluation Board Bluetooth
Paring example with NTAG I²C plus
Rev. 2.0 — 5 June 2018
422220
User manual
COMPANY PUBLIC
Document information
Info
Content
Keywords
NTAG I²C plus, FRDM-KW41Z
Abstract
This document gives a start-up guide for Bluetooth BLE pairing
demonstration between FRDM-KW41 and NFC mobile device with use of
NTAG I²C plus and also explains how the pairing part is included in the
connectivity stack.

NXP Semiconductors
UM10950
Bluetooth pairing example for NTAG I²C plus and KW41Z
UM10950
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 2.0 — 5 June 2018
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Contact information
For more information, please visit:
http://www.nxp.com
Revision history
Rev
Date
Description
2.0
20180605
The BT pairing was updated with a different demo application and migrated from Kinetis
Design Studio to MCUXpresso IDE and SDK.
1.2
20180206
Change of the information on how to use the demo in chapter 2
1.1
20170307
Text: LPCXpresso IDE changed to Kinetis Design Studio IDE
1.0
20170307
Initial version

NXP Semiconductors
UM10950
Bluetooth pairing example for NTAG I²C plus and KW41Z
UM10950
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 2.0 — 5 June 2018
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1. Introduction and HW setup
This document can be divided into three basic parts. This the first one introduces and
describes the HW setting. The second part is a quick startup guide and describes how to
quickly and easily work with the prepared sample of the Bluetooth demo application. The
third part of the document describes how to import NTAG I2C middleware with a NDEF
library into the selected Bluetooth application.
The whole integration process of the NTAG I2C middleware and the NDEF library can be
applied to any customer application.
1.1 HW setup
For the NTAG I2C plus development kit, there are 2 kits that can be attached to the
FRDM-KW41Z board. The first OM5569 [2] is the original and it represents the typical
HW design, the second OM23221ARD [3] is adapted to Arduino pinout. Both kits are fully
fledged and its on the user which is chosen.
1.1.1 NTAG I2C plus board
The HW connection and wiring between the NTAG I2C plus board and FRDM-KW41Z
board is shown at the following picture. RGB LED and micro switches SW3, SW4 which
are used in HID_device demo application (more information is in the chapter 2.2) and
which signal usage of the NTAG I2C chip are mounted directly on the FRDM-KW41Z.
Setting functions and control functions for this LED is a part of the SDK. From this reason
there is not required extra HW setup for these elements (see reference[2]).
Fig 1. HW connection with the NTAG I2C plus board (OM5569)

NXP Semiconductors
UM10950
Bluetooth pairing example for NTAG I²C plus and KW41Z
UM10950
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 2.0 — 5 June 2018
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Table 1. HW configuration within the integration of the NTAG I2C plus PCB board
Example
Description
GPIO
GPIO direction
specification
I2C – SCL
Interface clock
PTC 2
I2C specific
open drain SCL
I2C – SDA
Interface data
PTC 3
I2C specific
open drain SCL
GND
Ground
GND
output
-
VCC_SW
NTAG I2C Antenna
board power supply
P3V3
output
-
LED – RED
FRDM-KW41Z -
RGB LED driver
PTC 1
output
Default SDK
configuration
LED – GREEN
FRDM-KW41Z
RGB LED driver
PTA 19
output
Default SDK
configuration
LED – BLUE
FRDM-KW41Z
RGB LED driver
PTA 18
output
Default SDK
configuration
SW3
PTC 4
input
Default SDK
configuration
SW4
PTC 5
input
Default SDK
configuration
1.1.2 Arduino NTAG I2C plus board
OM23221ARD development kit with NTAG I²C plus is an easy add-on to many popular
MCU boards. It gives connectivity to any device with Arduino pinout. The HW setting is
the identical with previous description in the chapter 1.1.1 (see reference [3])
Fig 2. HW connection with the Arduino NTAG I2C plus board (OM23221ARD)

NXP Semiconductors
UM10950
Bluetooth pairing example for NTAG I²C plus and KW41Z
UM10950
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 2.0 — 5 June 2018
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2. Quick start-up the demo application
This chapter provides a procedure how to easily install the development environment
with the necessary components. Next, how to compile and debug a demo application and
finally how to verify it's functionality.
2.1 Installation of the MCUXpresso IDE and SDK
The whole project of the demo application is written for the MCUXpresso IDE, so it is
necessary to install this development environment. The next step is to generate and
import the SDK (Software Development Kit) needed for the application to be compiled
and debugged. The procedure to achieve this is described in the following chapters.
2.1.1 How to download the installation file of the MCUXpresso IDE
The following steps show how to easily download the installation file for the MCUXpresso
IDE.
1.) Open the welcome page of the MCUXpresso site [4]:
https://mcuxpresso.nxp.com/en/welcome
2.) Select the “SOFTWARE AND TOOLS” and press the “Learn More >”
Fig 3. MCUXpresso SDK builder – software tools

NXP Semiconductors
UM10950
Bluetooth pairing example for NTAG I²C plus and KW41Z
UM10950
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© NXP B.V. 2018. All rights reserved.
User manual
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3.) In the next step you will be redirected to the NXP web page
4.) Choose the “DOWNLOADS” tab and press the “Download”
Fig 4. IDE – starting the download
5.) Within the next step is necessary to sign in.
6.) Select the version of the installation file for MCUXpresso. It is recommended to
select the latest version (especially at the start of development) because it
contains the latest updates.
Fig 5. IDE – select a version

NXP Semiconductors
UM10950
Bluetooth pairing example for NTAG I²C plus and KW41Z
UM10950
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 2.0 — 5 June 2018
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7.) Select the correct type of the operating system that is used by user and
download the installation file.
Fig 6. IDE – select and download
2.1.2 Installation of the MCUXpresso IDE
The installation file was obtained using the procedure in the previous chapter 2.1.1. Once
it is started, it is recommended that user follows the standard recommended installation
setup. Custom installation requires a deeper knowledge of the MCUXpresso IDE.
No additional licenses are required after installing MCUXpresso. The development
environment can be used immediately in its entirety.
2.1.3 How to generate MCUXpresso SDK with Bluetooth and NTAG I2C software
From the reason the ntag_i2c_plus middleware (which covers the NTAG I2C chip
functionality) is missing in the general SDK here is the procedure how to generate the
SDK based on the necessary parts for the Bluetooth demo applications and
ntag_i2c_plus middleware software. Follow the steps bellow.

NXP Semiconductors
UM10950
Bluetooth pairing example for NTAG I²C plus and KW41Z
UM10950
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© NXP B.V. 2018. All rights reserved.
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1.) Open the welcome page of the MCUXpresso site [4]:
https://mcuxpresso.nxp.com/en/welcome
2.) Select the configurator based the board selection.
Fig 7. MCUXpresso SDK builder – board selection
3.) Sign in to the web page – it is necessary step
Fig 8. MCUXpresso login page

NXP Semiconductors
UM10950
Bluetooth pairing example for NTAG I²C plus and KW41Z
UM10950
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 2.0 — 5 June 2018
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4.) Enter the keyword “FRDM-KW41Z“ and configure the SDK
Fig 9. KW41Z board selection
5.) Select the SDK components
Fig 10. SDK components selection

NXP Semiconductors
UM10950
Bluetooth pairing example for NTAG I²C plus and KW41Z
UM10950
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 2.0 — 5 June 2018
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6.) Verify and start SDK building
Fig 11. SDK creating
7.) Download the SDK
Fig 12. SDK downloading
2.1.4 Importing the SDK to the MCUXpresso IDE
The final step that needs to be implemented to achieve a fully functional development
environment is importing the SDK. This step is very simple and it is done in a drag and
drop way. The following procedure shows how to import SDK.
1.) Launch the MCUXpresso IDE and select the workspace via the occurred popup
window.
2.) Switch window to the “Installed SDKs” and via drag & drop technique install the
downloaded SDK (see figure Fig 13).