.. zephyr:board:: nrf51dk

Overview

The nRF51 Development Kit (PCA10028) hardware provides support for the Nordic Semiconductor nRF51822 ARM Cortex-M0 CPU.

More information about the board can be found at the nRF51 DK website. The nRF51 Development Kit User Guide contains the processor's information and the datasheet.

Hardware

nRF51 DK has two external oscillators. The frequency of the slow clock is 32.768 kHz. The frequency of the main clock is 16 MHz.

Supported Features

.. zephyr:board-supported-hw::

See nRF51 DK website_ and nRF51 Development Kit User Guide_ for a complete list of nRF51 Development Kit board hardware features.

Connections and IOs

LED

LED1 (green) = P0.21
LED2 (green) = P0.22
LED3 (green) = P0.23
LED4 (green) = P0.24

Push buttons

BUTTON1 = SW1 = P0.17
BUTTON2 = SW2 = P0.18
BUTTON3 = SW3 = P0.19
BUTTON4 = SW4 = P0.20
BOOT = SW5 = boot/reset

Programming and Debugging

.. zephyr:board-supported-runners::

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 board nRF51 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: nrf51dk/nrf51822 :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 nRF51 DK

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

.. code-block:: console

samples/basic/blinky samples/basic/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/nrf51dk/nrf51dk_nrf51822.dts.

References

.. target-notes::

.. _nRF51 DK website: https://www.nordicsemi.com/Software-and-Tools/Development-Kits/nRF51-DK .. _nRF51 Development Kit User Guide: https://docs.nordicsemi.com/bundle/nRF51-Series-DK/resource/nRF51_Development_Kit_User_Guide_v1.2.pdf