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zephyr/boards/arm/frdm_kw41z/doc/index.rst

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.. _frdm_kw41z:
NXP FRDM-KW41Z
##############
Overview
********
The FRDM-KW41Z is a development kit enabled by the Kinetis |reg| W series
KW41Z/31Z/21Z (KW41Z) family built on ARM |reg| Cortex |reg|-M0+ processor with
integrated 2.4 GHz transceiver supporting Bluetooth |reg| Smart/Bluetooth
|reg| Low Energy
(BLE) v4.2, Generic FSK, IEEE |reg| 802.15.4 and Thread.
The FRDM-KW41Z kit contains two Freedom boards that can be used as a
development board or a shield to connect to a host processor. The FRDM-KW41Z is
form-factor compatible with the Arduino |trade| R3 pin layout for more expansion
options.
The FRDM-KW41Z highly-sensitive, optimized 2.4 GHz radio features a PCB
F-antenna which can be bypassed to test via SMA connection, multiple power
supply options, push/capacitive touch buttons, switches, LEDs and integrated
sensors.
.. image:: ./frdm_kw41z.jpg
:width: 720px
:align: center
:alt: FRDM-KW41Z
Hardware
********
- Can be configured as Host or Shield for connection to Host Processor
- Supports all DC-DC configurations (Buck, Boost, Bypass)
- PCB inverted F-type antenna
- SMA RF Connector
- RF regulatory certified
- Serial Flash for OTA firmware upgrades
- On board NXP FXOS8700CQ digital sensor, 3D Accelerometer ( |plusminus| 2g/
|plusminus| 4g/ |plusminus| 8g) + 3D
Magnetometer
- OpenSDA and JTAG debug
For more information about the KW41Z SoC and FRDM-KW41Z board:
- `KW41Z Website`_
- `KW41Z Datasheet`_
- `KW41Z Reference Manual`_
- `FRDM-KW41Z Website`_
- `FRDM-KW41Z User Guide`_
- `FRDM-KW41Z Schematics`_
Supported Features
==================
The frdm_kw41z board configuration supports the following hardware features:
+-----------+------------+-------------------------------------+
| Interface | Controller | Driver/Component |
+===========+============+=====================================+
| NVIC | on-chip | nested vector interrupt controller |
+-----------+------------+-------------------------------------+
| SYSTICK | on-chip | systick |
+-----------+------------+-------------------------------------+
| PINMUX | on-chip | pinmux |
+-----------+------------+-------------------------------------+
| COUNTER | on-chip | rtc |
+-----------+------------+-------------------------------------+
| GPIO | on-chip | gpio |
+-----------+------------+-------------------------------------+
| I2C | on-chip | i2c |
+-----------+------------+-------------------------------------+
| SPI | on-chip | spi |
+-----------+------------+-------------------------------------+
| ADC | on-chip | adc |
+-----------+------------+-------------------------------------+
| UART | on-chip | serial port-polling; |
| | | serial port-interrupt |
+-----------+------------+-------------------------------------+
| FLASH | on-chip | soc flash |
+-----------+------------+-------------------------------------+
| SENSOR | off-chip | fxos8700 polling: |
| | | fxos8700 trigger |
+-----------+------------+-------------------------------------+
The default configuration can be found in the defconfig file:
``boards/arm/frdm_kw41z/frdm_kw41z_defconfig``
Other hardware features are not currently supported by the port.
Connections and IOs
===================
The KW41Z SoC has three pairs of pinmux/gpio controllers, but only two are
currently enabled (PORTA/GPIOA and PORTC/GPIOC) for the FRDM-KW41Z board.
+-------+-------------+---------------------------+
| Name | Function | Usage |
+=======+=============+===========================+
| PTC1 | GPIO | Red LED / FXOS8700 INT1 |
+-------+-------------+---------------------------+
| PTA19 | GPIO | Green LED |
+-------+-------------+---------------------------+
| PTA18 | GPIO | Blue LED |
+-------+-------------+---------------------------+
| PTB2 | ADC | ADC0 channel 3 |
+-------+-------------+---------------------------+
| PTC2 | I2C1_SCL | I2C / FXOS8700 |
+-------+-------------+---------------------------+
| PTC3 | I2C1_SDA | I2C / FXOS8700 |
+-------+-------------+---------------------------+
| PTC4 | GPIO | SW3 |
+-------+-------------+---------------------------+
| PTC5 | GPIO | SW4 |
+-------+-------------+---------------------------+
| PTC6 | LPUART0_RX | UART Console |
+-------+-------------+---------------------------+
| PTC7 | LPUART0_TX | UART Console |
+-------+-------------+---------------------------+
| PTC16 | SPI0_SCK | SPI |
+-------+-------------+---------------------------+
| PTC17 | SPI0_SOUT | SPI |
+-------+-------------+---------------------------+
| PTC18 | SPI0_SIN | SPI |
+-------+-------------+---------------------------+
| PTC19 | SPI0_PCS0 | SPI |
+-------+-------------+---------------------------+
System Clock
============
The KW41Z SoC is configured to use the 32 MHz external oscillator on the board
with the on-chip FLL to generate a 40 MHz system clock.
Serial Port
===========
The KW41Z SoC has one UART, which is used for the console.
Programming and Debugging
*************************
Build and flash applications as usual (see :ref:`build_an_application` and
:ref:`application_run` for more details).
Configuring a Debug Probe
=========================
A debug probe is used for both flashing and debugging the board. This board is
configured by default to use the :ref:`opensda-daplink-onboard-debug-probe`.
Option 1: :ref:`opensda-daplink-onboard-debug-probe` (Recommended)
------------------------------------------------------------------
Install the :ref:`pyocd-debug-host-tools` and make sure they are in your search
path.
Follow the instructions in :ref:`opensda-daplink-onboard-debug-probe` to program
the `OpenSDA DAPLink FRDM-KW41Z Firmware`_.
Option 2: :ref:`opensda-jlink-onboard-debug-probe`
--------------------------------------------------
Install the :ref:`jlink-debug-host-tools` and make sure they are in your search
path.
Follow the instructions in :ref:`opensda-jlink-onboard-debug-probe` to program
the `OpenSDA J-Link FRDM-KW41Z Firmware`_.
Add the argument ``-DOPENSDA_FW=jlink`` when you invoke ``west build`` or
``cmake`` to override the default runner from pyOCD to J-Link:
.. zephyr-app-commands::
:zephyr-app: samples/hello_world
:tool: all
:board: frdm_kw41z
:gen-args: -DOPENSDA_FW=jlink
:goals: build
Configuring a Console
=====================
Regardless of your choice in debug probe, we will use the OpenSDA
microcontroller as a usb-to-serial adapter for the serial console.
Connect a USB cable from your PC to J6.
Use the following settings with your serial terminal of choice (minicom, putty,
etc.):
- Speed: 115200
- Data: 8 bits
- Parity: None
- Stop bits: 1
Flashing
========
Here is an example for the :ref:`hello_world` application.
.. zephyr-app-commands::
:zephyr-app: samples/hello_world
:board: frdm_kw41z
:goals: flash
Open a serial terminal, reset the board (press the SW1 button), and you should
see the following message in the terminal:
.. code-block:: console
***** Booting Zephyr OS v1.14.0-rc1 *****
Hello World! frdm_kw41z
Debugging
=========
Here is an example for the :ref:`hello_world` application.
.. zephyr-app-commands::
:zephyr-app: samples/hello_world
:board: frdm_kw41z
:goals: debug
Open a serial terminal, step through the application in your debugger, and you
should see the following message in the terminal:
.. code-block:: console
***** Booting Zephyr OS v1.14.0-rc1 *****
Hello World! frdm_kw41z
.. _FRDM-KW41Z Website:
https://www.nxp.com/products/processors-and-microcontrollers/arm-based-processors-and-mcus/kinetis-cortex-m-mcus/w-serieswireless-conn.m0-plus-m4/freedom-development-kit-for-kinetis-kw41z-31z-21z-mcus:FRDM-KW41Z
.. _FRDM-KW41Z User Guide:
https://www.nxp.com/webapp/Download?colCode=FRDMKW41ZUG
.. _FRDM-KW41Z Schematics:
https://www.nxp.com/webapp/Download?colCode=FRDM-KW41Z-SCH
.. _KW41Z Website:
https://www.nxp.com/products/wireless/zigbee/kinetis-kw41z-2.4-ghz-dual-mode-bluetooth-low-energy-and-802.15.4-wireless-radio-microcontroller-mcu-based-on-arm-cortex-m0-plus-core:KW41Z
.. _KW41Z Datasheet:
https://www.nxp.com/docs/en/data-sheet/MKW41Z512.pdf
.. _KW41Z Reference Manual:
https://www.nxp.com/webapp/Download?colCode=MKW41Z512RM
.. _OpenSDA DAPLink FRDM-KW41Z Firmware:
https://www.nxp.com/assets/downloads/data/en/reference-applications/OpenSDAv2.2_DAPLink_frdmkw41z_rev0241.zip
.. _OpenSDA J-Link FRDM-KW41Z Firmware:
https://www.segger.com/downloads/jlink/OpenSDA_FRDM-KW41Z
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