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boards: nxp: frdm_k32l2b3: Add initial support
Adding initial support for NXP FRDM K32L2B3 board. Signed-off-by: Ishraq Ibne Ashraf <ishraq.i.ashraf@gmail.com> dts: arm: nxp: Fix SRAM node name Fix address part of the SRAM node name. Change the SRAM start address definition to lower case hexadecimal to be consistent. Signed-off-by: Ishraq Ibne Ashraf <ishraq.i.ashraf@gmail.com>
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‎boards/nxp/frdm_k32l2b3/Kconfig.frdm_k32l2b3

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#
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# Copyright (c) 2025 Ishraq Ibne Ashraf <ishraq.i.ashraf@gmail.com>
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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config BOARD_FRDM_K32L2B3
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select SOC_K32L2B31A
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select SOC_PART_NUMBER_K32L2B31VLH0A

‎boards/nxp/frdm_k32l2b3/board.cmake

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#
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# Copyright (c) 2025 Ishraq Ibne Ashraf <ishraq.i.ashraf@gmail.com>
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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board_runner_args(linkserver "--device=K32L2B31A:FRDM-K32L2B")
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board_runner_args(pyocd "--target=k32l2b3")
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include(${ZEPHYR_BASE}/boards/common/linkserver.board.cmake)
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include(${ZEPHYR_BASE}/boards/common/pyocd.board.cmake)

‎boards/nxp/frdm_k32l2b3/board.yml

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board:
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name: frdm_k32l2b3
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full_name: FRDM-K32L2B3
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vendor: nxp
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socs:
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- name: k32l2b31a

‎boards/nxp/frdm_k32l2b3/doc/frdm_k32l2b3.webp

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‎boards/nxp/frdm_k32l2b3/doc/index.rst

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.. zephyr:board:: frdm_k32l2b3
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Overview
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********
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The FRDM-K32L2B3 FRDM development board provides a platform for evaluation and
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development of the K32 L2B SoC Family. The board provides easy Access to K32 L2B
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SoC I/O.
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Hardware
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********
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- K32L2B31VLH0A SoC running at up to 48 MHz, 256 kB flash memory, 32 kB SRAM memory.
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- Full-speed USB port with micro A/B connector for device functionality.
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- NXP FXOS8700CQ digital sensor, 3D accelerometer (±2g/±4g/±8g) + 3D magnetometer.
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- On-board segment LCD.
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- Form factor compatible with Arduino® Rev3 pin layout.
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- OpenSDA debug interface.
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For more information about the K32L2B31VLH0A SoC and FRDM-K32L2B3 board:
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- `FRDM-KL32L2B3 Website`_
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- `KL32-L2 Website`_
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Supported Features
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==================
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.. zephyr:board-supported-hw::
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Connections and IOs
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===================
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The K32L2B31VLH0A SoC has five pairs of pinmux/gpio controllers, and all are currently
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enabled (PORTA/GPIOA, PORTB/GPIOB, PORTC/GPIOC, PORTD/GPIOD, and PORTE/GPIOE) for the
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FRDM-K32L2B3 board.
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+-------+-------------+---------------------------+
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| Name | Function | Usage |
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+=======+=============+===========================+
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| PTD5 | GPIO | Green LED |
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+-------+-------------+---------------------------+
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| PTE31 | GPIO | Red LED |
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+-------+-------------+---------------------------+
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| PTA4 | GPIO | User Button 1 (SW1) |
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+-------+-------------+---------------------------+
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| PTC3 | GPIO | User Button 2 (SW2) |
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+-------+-------------+---------------------------+
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| PTA1 | LPUART0_RX | UART Console |
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+-------+-------------+---------------------------+
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| PTA2 | LPUART0_TX | UART Console |
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+-------+-------------+---------------------------+
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| PTE24 | I2C0_SCL | I2C Accelerometer |
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+-------+-------------+---------------------------+
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| PTE25 | I2C0_SDA | I2C Accelerometer |
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+-------+-------------+---------------------------+
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System Clock
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============
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The K32L2B31VLH0A SoC is configured to use the 32.768 kHz external
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oscillator on the board to generate a 48 MHz system clock.
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Serial Port
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===========
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The K32L2B31VLH0A LPUART0 is used for the console.
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Programming and Debugging
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*************************
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.. zephyr:board-supported-runners::
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Build and flash applications as usual (see :ref:`build_an_application` and
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:ref:`application_run` for more details).
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Configuring a Debug Probe
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=========================
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A debug probe is used for both flashing and debugging the board. This board is
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configured by default to use the :ref:`opensda-daplink-onboard-debug-probe`.
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For more information about OpenSDA and firmware applications check `OpenSDA FRDM-K32L2B3`_.
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Using LinkServer
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----------------
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Install the :ref:`linkserver-debug-host-tools` and make sure they are in your
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search path. LinkServer works with the CMSIS-DAP firmware. Please follow the
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instructions on :ref:`opensda-daplink-onboard-debug-probe` and select the latest
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revision of the firmware image.
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LinkServer is the default for this board, ``west flash`` and ``west debug`` will
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call the linkserver runner.
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.. code-block:: console
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west flash
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west debug
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Using pyOCD
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-----------
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Install the :ref:`pyocd-debug-host-tools` and make sure they are in your search
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path. pyOCD works with the CMSIS-DAP firmware.
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Add the arguments ``-DBOARD_FLASH_RUNNER=pyocd`` and
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``-DBOARD_DEBUG_RUNNER=pyocd`` when you invoke ``west build`` to override the
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default runner from linkserver to pyocd:
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: frdm_k32l2b3
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:gen-args: -DBOARD_FLASH_RUNNER=pyocd -DBOARD_DEBUG_RUNNER=pyocd
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:goals: build
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Configuring a Console
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=====================
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Regardless of your choice in debug probe, we will use the OpenSDA
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microcontroller as a usb-to-serial adapter for the serial console.
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Connect a USB cable from your PC to J13.
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Use the following settings with your serial terminal of choice
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(minicom, putty, etc.):
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- Speed: 115200
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- Data: 8 bits
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- Parity: None
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- Stop bits: 1
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Flashing
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========
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Here is an example for the :zephyr:code-sample:`hello_world` application.
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: frdm_k32l2b3
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:goals: flash
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Open a serial terminal, reset the board (press the SW2 button), and you should
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see the following message in the terminal:
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.. code-block:: console
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*** Booting Zephyr OS build v4.1.0-7032-g3198db1b1229 ***
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Hello World! frdm_k32l2b3/k32l2b31a
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Debugging
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=========
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Here is an example for the :zephyr:code-sample:`hello_world` application.
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: frdm_k32l2b3
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:goals: debug
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Open a serial terminal, step through the application in your debugger, and you
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should see the following message in the terminal:
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.. code-block:: console
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*** Booting Zephyr OS build v4.1.0-7032-g3198db1b1229 ***
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Hello World! frdm_k32l2b3/k32l2b31a
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.. include:: ../../common/board-footer.rst
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:start-after: nxp-board-footer
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.. _KL32-L2 Website:
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https://www.nxp.com/products/K32-L2
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.. _FRDM-KL32L2B3 Website:
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https://www.nxp.com/design/design-center/development-boards-and-designs/general-purpose-mcus/nxp-frdm-development-platform-for-k32-l2b-mcus:FRDM-K32L2B3
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.. _OpenSDA FRDM-K32L2B3:
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https://www.nxp.com/design/design-center/development-boards-and-designs/OPENSDA#FRDM-K32L2B3

‎boards/nxp/frdm_k32l2b3/frdm_k32l2b3-pinctrl.dtsi

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/*
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* Copyright (c) 2025 Ishraq Ibne Ashraf <ishraq.i.ashraf@gmail.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <nxp/kinetis/K32L2B31VLH0A-pinctrl.h>
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&pinctrl {
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lpuart0_default: lpuart0_default {
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group0 {
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pinmux =
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<LPUART0_RX_PTA1>,
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<LPUART0_TX_PTA2>;
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slew-rate = "slow";
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drive-strength = "low";
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};
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};
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i2c0_default: i2c0_default {
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group0 {
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pinmux =
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<I2C0_SCL_PTE24>,
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<I2C0_SDA_PTE25>;
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bias-pull-up;
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slew-rate = "fast";
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drive-strength = "low";
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};
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};
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};

‎boards/nxp/frdm_k32l2b3/frdm_k32l2b3.dts

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/*
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* Copyright (c) 2025 Ishraq Ibne Ashraf <ishraq.i.ashraf@gmail.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/dts-v1/;
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#include <nxp/nxp_k32l2b3.dtsi>
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#include <zephyr/dt-bindings/input/input-event-codes.h>
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#include "frdm_k32l2b3-pinctrl.dtsi"
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/ {
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model = "NXP FRDM-K32L2B3 board";
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compatible = "nxp,k32l2b3", "nxp,k32lx";
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aliases {
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led0 = &led_green;
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led1 = &led_red;
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sw0 = &sw_1;
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sw1 = &sw_3;
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magn0 = &fxos8700;
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accel0 = &fxos8700;
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};
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chosen {
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zephyr,sram = &sram0;
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zephyr,flash = &flash0;
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zephyr,console = &lpuart0;
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zephyr,shell-uart = &lpuart0;
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};
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leds {
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compatible = "gpio-leds";
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led_green: led_1 {
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label = "Green LED";
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gpios = <&gpiod 5 GPIO_ACTIVE_LOW>;
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};
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led_red: led_2 {
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label = "Red LED";
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gpios = <&gpioe 31 GPIO_ACTIVE_LOW>;
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};
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};
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gpio_keys {
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compatible = "gpio-keys";
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sw_1: button_1 {
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label = "User Button 1 (SW1)";
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zephyr,code = <INPUT_KEY_0>;
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gpios = <&gpioa 4 GPIO_ACTIVE_LOW>;
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};
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sw_3: button_2 {
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label = "User Button 2 (SW3)";
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zephyr,code = <INPUT_KEY_1>;
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gpios = <&gpioc 3 GPIO_ACTIVE_LOW>;
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};
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};
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};
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&cpu0 {
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clock-frequency = <48000000>;
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};
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&sim {
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er32k-select = <KINETIS_SIM_ER32KSEL_OSC32KCLK>;
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pllfll-select = <KINETIS_SIM_PLLFLLSEL_MCGPLLCLK>;
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};
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&osc {
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mode = "low-power";
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clock-frequency = <32768>;
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};
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&ftfa {
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status = "okay";
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};
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&gpioa {
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status = "okay";
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};
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&gpiob {
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status = "okay";
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};
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&gpioc {
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status = "okay";
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};
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&gpiod {
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status = "okay";
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};
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&gpioe {
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status = "okay";
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};
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&lpuart0 {
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status = "okay";
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current-speed = <115200>;
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pinctrl-0 = <&lpuart0_default>;
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pinctrl-names = "default";
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};
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&i2c0 {
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status = "okay";
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pinctrl-0 = <&i2c0_default>;
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pinctrl-names = "default";
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fxos8700: fxos8700@1c {
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compatible = "nxp,fxos8700";
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reg = <0x1c>;
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int1-gpios = <&gpiod 1 GPIO_ACTIVE_LOW>;
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reset-gpios = <&gpioe 1 GPIO_ACTIVE_HIGH>;
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};
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};

‎boards/nxp/frdm_k32l2b3/frdm_k32l2b3.yaml

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#
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# Copyright (c) 2025 Ishraq Ibne Ashraf <ishraq.i.ashraf@gmail.com>
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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identifier: frdm_k32l2b3
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name: NXP FRDM-K32L2B3
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type: mcu
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arch: arm
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ram: 32
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flash: 256
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toolchain:
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- zephyr
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- gnuarmemb
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supported:
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- led
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- i2c
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- gpio
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- sram
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- flash
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- lpuart
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- button
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- pinctrl
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vendor: nxp

‎boards/nxp/frdm_k32l2b3/frdm_k32l2b3_defconfig

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#
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# Copyright (c) 2025 Ishraq Ibne Ashraf <ishraq.i.ashraf@gmail.com>
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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CONFIG_GPIO=y
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CONFIG_SERIAL=y
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CONFIG_CONSOLE=y
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CONFIG_UART_CONSOLE=y

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