The nRF51 Dongle (PCA10031) hardware provides support for the Nordic Semiconductor nRF51822 ARM Cortex-M0 CPU and the following devices:
- RADIO (Bluetooth Low Energy)
- Segger RTT (RTT Console)
nRF51 Dongle 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_pca10031 board configuration supports the following nRF51 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 Dongle
can be found. For example, under Linux,
Then build and flash the application in the usual way.
# From the root of the zephyr repository west build -b nrf51_pca10031 samples/hello_world west flash
Using CMake and ninja:
# From the root of the zephyr repository # Use cmake to configure a Ninja-based buildsystem: cmake -B build -GNinja -DBOARD=nrf51_pca10031 samples/hello_world # Now run ninja on the generated build system: ninja -C build ninja -C build flash
Testing the LEDs on the nRF51 Dongle¶
Build and flash the Blinky Application sample to test that the onboard LED is working properly with Zephyr.