Zephyr applications use the nrf51_pca10028 board configuration to run on the nRF51 Development Kit (PCA10028) hardware. It provides support for the Nordic Semiconductor nRF51822 ARM Cortex-M0 CPU and the following devices:
- RADIO (Bluetooth Low Energy)
- Segger RTT (RTT Console)
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.
The nrf51_pca10028 board configuration supports the following nRF51 hardware features:
Other hardware features are not supported by the Zephyr kernel. See nRF51 DK website  and Nordic Semiconductor Documentation library  for a complete list of nRF51 Development Kit board hardware features.
Programming and Debugging¶
Follow the instructions in the Nordic nRF5x Segger J-Link page to install and configure all the necessary software. Further information can be found in Flashing. Then build and flash applications as usual (see Build an Application and Run an Application for more details).
Here is an example for the Hello World application.
First, run your favorite terminal program to listen for output.
$ minicom -D <tty_device> -b 115200
<tty_device> with the port where the board nRF51 DK
can be found. For example, under Linux,
Then build and flash the application in the usual way.
# On Linux/macOS cd $ZEPHYR_BASE/samples/hello_world mkdir build && cd build # On Windows cd %ZEPHYR_BASE%\samples\hello_world mkdir build & cd build # Use cmake to configure a Ninja-based build system: cmake -GNinja -DBOARD=nrf51_pca10028 .. # Now run ninja on the generated build system: ninja ninja flash