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Overview

boards/nxp/frdm_k82f/doc/index.rst

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.. zephyr:board:: frdm_k82f

Overview

The FRDM-K82F is a low-cost development platform for Kinetis K80, K81, and K82 MCUs.

  • Form-factor compatible with the Arduino R3 pin layout
  • Peripherals enable rapid prototyping, including a six-axis digital accelerometer and magnetometer to create full eCompass capabilities, a tri-colored LED and two user push-buttons for direct interaction, 2x32 Mb QuadSPI external flash, FlexIO camera header, touchpads and headers for use with Bluetooth and 2.4 GHz radio add-on modules
  • OpenSDAv2.1, the NXP open source hardware embedded serial and debug adapter running an open source bootloader, offers options for serial communication, flash programming, and run-control debugging

Hardware

  • MK82FN256VLL15 MCU (150 MHz, 256 KB flash memory, 256 KB RAM, low-power, crystal-less USB, and 100 Low profile Quad Flat Package (LQFP))

  • Dual role USB interface with micro-B USB connector

  • RGB LED

  • FXOS8700CQ accelerometer and magnetometer

  • Two user push buttons

  • 2x 32 Mb QSPI flash

  • Flexible power supply option - OpenSDAv2.1 USB, Kinetis K82 USB, and external source

  • Easy access to MCU input/output through Arduino R3 compatible I/O connectors

  • Programmable OpenSDAv2.1 debug circuit supporting the CMSIS-DAP Interface software that provides:

    • Mass storage device (MSD) flash programming interface
    • CMSIS-DAP debug interface over a driver-less USB HID connection providing run-control debugging and compatibility with IDE tools
    • Virtual serial port interface
    • Open source CMSIS-DAP software project

  • FlexIO header

For more information about the K82F SoC and FRDM-K82F board:

  • K82F Website_
  • K82F Datasheet_
  • K82F Reference Manual_
  • FRDM-K82F Website_
  • FRDM-K82F User Guide_
  • FRDM-K82F Schematics_

Supported Features

.. zephyr:board-supported-hw::

.. note::

For additional features not yet supported, please also refer to the :zephyr:board:frdm_k64f, which is the superset board in NXP's Kinetis K series. NXP prioritizes enabling the superset board with NXP's Full Platform Support for Zephyr. Therefore, the frdm_k64f board may have additional features already supported, which can also be re-used on this frdm_k82f board.

System Clock

The K82F SoC is configured to use the 12 MHz external oscillator on the board with the on-chip PLL to generate a 120 MHz system clock.

Serial Port

The K82F SoC has five UARTs. One is configured for the console, the remaining ones are not used.

USB

The K82F SoC has a USB OTG (USBOTG) controller that supports both device and host functions through its micro USB connector (J11). Only USB device function is supported in Zephyr at the moment.

Programming and Debugging

.. zephyr:board-supported-runners::

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.

Early versions of this board have an outdated version of the OpenSDA bootloader and require an update. Please see the DAPLink Bootloader Update_ page for instructions to update from the CMSIS-DAP bootloader to the DAPLink bootloader.

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-K82F Firmware_.

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 Firmware for FRDM-K82F_.

Add the arguments -DBOARD_FLASH_RUNNER=jlink and -DBOARD_DEBUG_RUNNER=jlink when you invoke west build to override the default runner from pyOCD to J-Link:

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: frdm_k82f :gen-args: -DBOARD_FLASH_RUNNER=jlink -DBOARD_DEBUG_RUNNER=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 J5.

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 :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: frdm_k82f :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-xxx-gxxxxxxxxxxxx ***** Hello World! frdm_k82f

Debugging

Here is an example for the :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: frdm_k82f :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-xxx-gxxxxxxxxxxxx ***** Hello World! frdm_k82f

.. include:: ../../common/board-footer.rst.inc

.. _FRDM-K82F Website: https://www.nxp.com/design/development-boards/freedom-development-boards/mcu-boards/freedom-development-platform-for-kinetis-k82-k81-and-k80-mcus:FRDM-K82F

.. _FRDM-K82F User Guide: https://www.nxp.com/webapp/Download?colCode=FRDMK82FUG

.. _FRDM-K82F Schematics: https://www.nxp.com/downloads/en/schematics/FRDM-K82F-SCH.pdf

.. _K82F Website: https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/k-series-cortex-m4/k8x-secure/kinetis-k82-150-mhz-hw-cryptographic-co-processor-quadspi-microcontrollers-mcus-based-on-arm-cortex-m4-core:K82_150

.. _K82F Datasheet: https://www.nxp.com/docs/en/data-sheet/K82P121M150SF5.pdf

.. _K82F Reference Manual: https://www.nxp.com/webapp/Download?colCode=K82P121M150SF5RM

.. _DAPLink Bootloader Update: https://os.mbed.com/blog/entry/DAPLink-bootloader-update/

.. _OpenSDA DAPLink FRDM-K82F Firmware: https://www.nxp.com/downloads/en/snippets-boot-code-headers-monitors/k20dx_frdmk82f_if_crc_legacy_0x8000.bin

.. _OpenSDA J-Link Firmware for FRDM-K82F: https://www.segger.com/downloads/jlink/OpenSDA_FRDM-K82F