Zephyr applications use the nrf52840_pca10056 board configuration to run on the nRF52840 Preview Development Kit (PCA10056) hardware. It provides support for the Nordic Semiconductor nRF52840 ARM Cortex-M4F CPU and the following devices:
- RADIO (Bluetooth Low Energy)
- Segger RTT (RTT Console)
nRF52840 PDK has two external oscillators. The frequency of the slow clock is 32.768 kHz. The frequency of the main clock is 32 MHz.
The nrf52840_pca10056 board configuration supports the following hardware features:
|NVIC||on-chip||nested vectored interrupt controller|
Other hardware features are not supported by the Zephyr kernel. See nRF52840 PDK website  and Nordic Semiconductor Infocenter  for a complete list of nRF52840 Development Kit board hardware features.
Programming and Debugging¶
Applications for the
nrf52840_pca10056 board configuration can be
built and flashed in the usual way (see Build an Application
and Run an Application for more details); however, the standard
debugging targets are not currently available.
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 nRF52 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=nrf52840_pca10056 .. # Now run ninja on the generated build system: ninja ninja flash