This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

nRF52-VBLUno52¶

Overview¶

Zephyr can use the nrf52_vbluno52 board configuration to run on the VBLUno52 board, a VNG Bluetooth Low Energy UNO using an nRF52832 ARM Cortex-M4F processor. It provides support for the Nordic Semiconductor nRF52832 ARM Cortex-M4F CPU and the following devices:

NVIC
RTC
UART
GPIO
FLASH
RADIO (Bluetooth Low Energy 5.0)

nRF52_VBLUno52 board¶

Hardware¶

The VBLUno52 board has two external oscillators. The frequency of the slow clock is 32.768 kHz. The frequency of the main clock is 64 MHz.

Supported Features¶

The nrf52_vbluno52 board configuration supports the following hardware features:

Interface	Controller	Driver/Component
NVIC	on-chip	nested vectored interrupt controller
RTC	on-chip	system clock
UART	on-chip	serial port
GPIO	on-chip	gpio
FLASH	on-chip	flash
RADIO	on-chip	Bluetooth
I2C	on-chip	i2c
SPI	on-chip	spi

Other hardware features are not supported by the Zephyr kernel.

Connections and IOs¶

LED¶

LED = LED0 (green) = P0.12

Push buttons¶

BUTTON = BUT = SW0 = P0.17

Programming and Debugging¶

Flashing¶

The VBLUno52 board has an on-board DAPLink (CMSIS-DAP) interface for flashing and debugging. You do not need any other programming device. You only need to install the pyOCD tool (https://pypi.python.org/pypi/pyOCD)

See the Getting Started Guide for general information on setting up your development environment.

You can build and flash applications in the usual way. Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b nrf52_vbluno52 samples/hello_world
west flash

Testing the VBLUno52 with Zephyr: buttons, LEDs, UART, BLE¶

Here are some sample applications that you can use to test different components on the VBLUno52 board: