.. zephyr:board:: nrf51_vbluno51

Overview

Zephyr uses the nrf51_vbluno51 board configuration to run on the VBLUno51 board, a VNG Bluetooth Low Energy UNO using an nRF51822 ARM processor.

.. figure:: img/nrf51_vbluno51_bot.jpg :align: center :alt: nRF51_VBLUno51 Bottom

 nrf51_vbluno51 Bottom

More information about the board can be found at the VBLUno51 wiki page_.

Hardware

VBLUno51 board has two external oscillators. The frequency of the slow clock is 32.768 kHz. The frequency of the main clock is 16 MHz.

• CPU:

  • Nordic nRF51822: ARM® Cortex® M0 32bit.
  • Bluetooth Low Energy interface.
  • 256KB Flash, 32KB RAM.
  • UART(1), I2C(2), SPI(1), PWM(3), SWD, Timer 16bit(3).
  • 21 digital channels, 6 ADC 10bit channels.
  • 1 Led and 1 Button onboard.
  • GPIO Voltage: 0 - 3.3V.

• DAPLink (CMSIS-DAP) interface for program and debug:

  • USB MSD: Drag and Drop programming flash memory.
  • USB HID (DAP): CMSIS-DAP compliant debug channel.
  • USB CDC: Virtual COM port for log, trace and terminal emulation.

• Supports hardware flow control features (RTS/CTS).

• Energy monitoring for BLE module by current measurement (Only VBLUno51_EM)

• FOTA (Firmware over the air): Upgrade firmware over BLE interface.

• Build good applications with:

  • Compiler and IDE: GCC, Keil MDK, IAR, Eclipse, Qt Creator.
  • Frameworks: Arduino, ARM mbed-OS, Zephyr-OS, Nordic SDK, RIOT-OS, MyNewt-OS, ChibiOS, NuttX RTOS
  • A lot of tutorials for Arduino, mbed-os and more.

• Pinout: Arduino Uno Rev3 compliant.

• Power:

  • USB port.
  • Power adapter: +9 -> +12V.
  • 3V Battery: CR20xx holder
  • Rechargeable battery jump: +3.7 -> +12V

• Open source: Hardware design, firmware, packages, tutorial and example codes

See VBLUno51 wiki page_ for full documents and tutorials about the VBLUno51 board.

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

LED

• LED = LED0 (green) = P0.7

Push buttons

• BUTTON = BUT = SW0 = P0.15

More details

.. figure:: img/vbluno51_nordic_pinout.jpg :align: center :alt: nRF51_VBLUno51 Pinout

 nrf51_vbluno51 Pinout

.. figure:: img/vbluno51_frizting.jpg :align: center :alt: nRF51_VBLUno51 Fritzing part

 nrf51_vbluno51 Fritzing part

Programming and Debugging

.. zephyr:board-supported-runners::

Applications for the nrf51_vbluno51 board configuration can be built and flashed in the usual way (see :ref:build_an_application and :ref:application_run for more details).

Flashing

The VBLUno51 board has on-board DAPLink (CMSIS-DAP) interface for flashing and debugging. You do not need any other programming device. You only need to install pyOCD tool (https://pypi.python.org/pypi/pyOCD)

This tutorial uses the blinky application :zephyr:code-sample:blinky.

See the :ref:getting_started for general information on setting up your development environment. Then build and flash the application in the usual way.

.. zephyr-app-commands:: :zephyr-app: samples/basic/blinky :board: nrf51_vbluno51 :goals: build flash

Debugging

You can debug an application in the usual way. Here is an example for the :zephyr:code-sample:blinky application.

.. zephyr-app-commands:: :zephyr-app: samples/basic/blinky :board: nrf51_vbluno51 :maybe-skip-config: :goals: debug

Testing the VBLUno51 with Zephyr: buttons, LEDs, UART, BLE

Here are some sample applications that you can use to test different components on the VBLUno51 board:

• :zephyr:code-sample:hello_world
• :zephyr:code-sample:blinky
• :zephyr:code-sample:button
• :zephyr:code-sample:bluetooth_beacon
• :zephyr:code-sample:ble_peripheral_hr

References

.. target-notes::

.. _VBLUno51 website: http://iotviet.com.vn/store/detail?id=2 .. _VBLUno51 wiki page: https://vngiotlab.github.io/vbluno/