.. zephyr:board:: nrf9151dk

Overview

The nRF9151 DK (PCA10171) is a single-board development kit for evaluation and development on the nRF9151 SiP for DECT NR+ and LTE-M/NB-IoT with GNSS. The nrf9151dk/nrf9151 board configuration provides support for the Nordic Semiconductor nRF9151 ARM Cortex-M33F CPU with ARMv8-M Security Extension.

More information about the board can be found at the nRF9151 website_.

Hardware

nRF9151 DK has two external oscillators. The frequency of the slow clock is 32.768 kHz. The frequency of the main clock is 32 MHz.

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

LED

LED1 (green) = P0.0
LED2 (green) = P0.1
LED3 (green) = P0.4
LED4 (green) = P0.5

Push buttons and Switches

BUTTON1 = P0.8
BUTTON2 = P0.9
SWITCH1 = P0.18
SWITCH2 = P0.19
BOOT = SW5 = boot/reset

Security components

Implementation Defined Attribution Unit (IDAU_). The IDAU is implemented with the System Protection Unit and is used to define secure and non-secure memory maps. By default, all of the memory space (Flash, SRAM, and peripheral address space) is defined to be secure accessible only.
Secure boot.

Programming and Debugging

.. zephyr:board-supported-runners::

nrf9151dk/nrf9151 supports the Armv8m Security Extension, and by default boots in the Secure state.

Building Secure/Non-Secure Zephyr applications with Arm® TrustZone®

The process requires the following steps:

Build the Secure Zephyr application using -DBOARD=nrf9151dk/nrf9151 and CONFIG_TRUSTED_EXECUTION_SECURE=y in the application project configuration file.
Build the Non-Secure Zephyr application using -DBOARD=nrf9151dk/nrf9151/ns.
Merge the two binaries together.

When building a Secure/Non-Secure application, the Secure application will have to set the IDAU (SPU) configuration to allow Non-Secure access to all CPU resources utilized by the Non-Secure application firmware. SPU configuration shall take place before jumping to the Non-Secure application.

Building a Secure only application

Build the Zephyr app in the usual way (see :ref:build_an_application and :ref:application_run), using -DBOARD=nrf9151dk/nrf9151.

Flashing

Follow the instructions in the :ref:nordic_segger page to install and configure all the necessary software. Further information can be found in :ref:nordic_segger_flashing. Then build and flash applications as usual (see :ref:build_an_application and :ref:application_run for more details).

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

First, run your favorite terminal program to listen for output.

.. code-block:: console

$ minicom -D <tty_device> -b 115200

Replace :code:<tty_device> with the port where the nRF9151 DK can be found. For example, under Linux, :code:/dev/ttyACM0.

Then build and flash the application in the usual way.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: nrf9151dk/nrf9151 :goals: build flash

Debugging

Refer to the :ref:nordic_segger page to learn about debugging Nordic boards with a Segger IC.

Testing the LEDs and buttons in the nRF9151 DK

There are 2 samples that allow you to test that the buttons (switches) and LEDs on the board are working properly with Zephyr:

:zephyr:code-sample:blinky
:zephyr:code-sample:button

You can build and flash the examples to make sure Zephyr is running correctly on your board. The button and LED definitions can be found in :zephyr_file:boards/nordic/nrf9151dk/nrf9151dk_nrf9151_common.dtsi.

References

.. target-notes::

.. _IDAU: https://developer.arm.com/docs/100690/latest/attribution-units-sau-and-idau .. _nRF9151 website: https://www.nordicsemi.com/Products/nRF9151 .. _Nordic Semiconductor TechDocs: https://docs.nordicsemi.com/ .. _Trusted Firmware M: https://www.trustedfirmware.org/projects/tf-m/