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Remove leading/trailing blank lines in .c, .h, .py, .rst, .yml, and .yaml files. Will avoid failures with the new CI test in https://github.com/zephyrproject-rtos/ci-tools/pull/112, though it only checks changed files. Move the 'target-notes' target in boards/xtensa/odroid_go/doc/index.rst to get rid of the trailing blank line there. It was probably misplaced. Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
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.. _nrf52_vbluno52:
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nRF52-VBLUno52
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##############
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Overview
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********
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Zephyr can use the nrf52_vbluno52 board configuration to run on the VBLUno52 board,
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a VNG Bluetooth Low Energy UNO using an nRF52832 ARM Cortex-M4F processor.
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It provides support for the Nordic Semiconductor nRF52832 ARM Cortex-M4F CPU and
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the following devices:
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* :abbr:`NVIC (Nested Vectored Interrupt Controller)`
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* :abbr:`RTC (nRF RTC System Clock)`
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* UART
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* GPIO
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* FLASH
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* RADIO (Bluetooth Low Energy 5.0)
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.. figure:: img/nrf52_vbluno52.png
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:align: center
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:alt: nRF52 VBLUno52
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nRF52_VBLUno52 board
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Hardware
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********
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The VBLUno52 board has two external oscillators. The frequency of
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the slow clock is 32.768 kHz. The frequency of the main clock
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is 64 MHz.
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Supported Features
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==================
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The nrf52_vbluno52 board configuration supports the following
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hardware features:
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+-----------+------------+----------------------+
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| Interface | Controller | Driver/Component |
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+===========+============+======================+
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| NVIC | on-chip | nested vectored |
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| | | interrupt controller |
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+-----------+------------+----------------------+
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| RTC | on-chip | system clock |
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+-----------+------------+----------------------+
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| UART | on-chip | serial port |
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+-----------+------------+----------------------+
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| GPIO | on-chip | gpio |
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+-----------+------------+----------------------+
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| FLASH | on-chip | flash |
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+-----------+------------+----------------------+
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| RADIO | on-chip | Bluetooth |
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+-----------+------------+----------------------+
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| I2C | on-chip | i2c |
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+-----------+------------+----------------------+
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| SPI | on-chip | spi |
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+-----------+------------+----------------------+
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Other hardware features are not supported by the Zephyr kernel.
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Connections and IOs
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===================
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LED
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---
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* LED = LED0 (green) = P0.12
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Push buttons
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------------
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* BUTTON = BUT = SW0 = P0.17
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Programming and Debugging
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*************************
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Flashing
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========
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The VBLUno52 board has an on-board DAPLink (CMSIS-DAP) interface for flashing and debugging.
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You do not need any other programming device.
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You only need to install the pyOCD tool (https://pypi.python.org/pypi/pyOCD)
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See the :ref:`getting_started` for general information on setting up
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your development environment.
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You can build and flash applications in the usual way. Here is an
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example for the :ref:`hello_world` application.
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: nrf52_vbluno52
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:goals: build flash
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Testing the VBLUno52 with Zephyr: buttons, LEDs, UART, BLE
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**********************************************************
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Here are some sample applications that you can use to test different
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components on the VBLUno52 board:
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* :ref:`hello_world`
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* :ref:`blinky-sample`
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* :ref:`button-sample`
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* :ref:`bluetooth-beacon-sample`
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* :ref:`peripheral_hr`
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