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boards/silabs/radio_boards/xg27/doc/bg27_rb4110b.rst

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.. zephyr:board:: bg27_rb4110b

Overview

The EFR32BG27 +4 dBm Radio Board (BG27-RB4110B) in CSP package is a plug-in board for the Wireless Starter Kit Mainboard (BRD4001A) and the Wireless Pro Kit Mainboard (BRD4002A). It is a complete reference design for the EFR32BG27 Wireless SoC, with matching network and a PCB antenna for 4 dBm output power in the 2.4 GHz band.

See :ref:silabs_radio_boards for more information about the Wireless Mainboard platform.

Hardware

  • EFR32BG27C320F768GJ39 SoC
  • CPU core: ARM Cortex®-M33 with FPU, DSP and TrustZone
  • Memory: 768 kB Flash, 64 kB RAM
  • Transmit power: up to +4 dBm
  • Operation frequency: 2.4 GHz
  • Crystals for LFXO (32.768 kHz) and HFXO (38.4 MHz)
  • 8 Mbit SPI NOR Flash

For more information about the EFR32BG27 SoC and BRD4110B board, refer to these documents:

  • BG27-RB4110B Website <https://www.silabs.com/development-tools/wireless/bluetooth/bg27-rb4110b-efr32bg27-4-dbm-buck-wireless-radio-board>__
  • BG27-RB4110B User Guide <https://www.silabs.com/documents/public/user-guides/ug552-brd4110b-user-guide.pdf>__
  • EFR32BG27 Website <https://www.silabs.com/wireless/bluetooth/efr32bg27-series-2-socs>__
  • EFR32BG27 Datasheet <https://www.silabs.com/documents/public/data-sheets/efr32bg27-datasheet.pdf>__
  • EFR32xG27 Reference Manual <https://www.silabs.com/documents/public/reference-manuals/efr32xg27-rm.pdf>__

Supported Features

.. zephyr:board-supported-hw::

System Clock

The EFR32BG27 SoC is configured to use the HFRCODPLL oscillator at 76.8 MHz as the system clock, locked to the 38.4 MHz external crystal oscillator on the board.

Serial Port

The EFR32BG27 SoC has two USARTs and one EUSART. USART1 is connected to the board controller and is used for the console.

Buttons and LEDs

This board has two buttons and two LEDs that share GPIO pins. If an application wants to use both a button and a LED with the same number (e.g. button 0 and LED 0), it needs to time multiplex the two functions.

Programming and Debugging

.. zephyr:board-supported-runners ::

Connect the BRD4002A mainboard with a mounted BRD4110B radio board to your host computer using the USB port.

Here is an example for the :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: bg27_rb4110b :goals: flash

Open a serial terminal (minicom, putty, etc.) with the following settings:

  • Speed: 115200
  • Data: 8 bits
  • Parity: None
  • Stop bits: 1

Reset the board and you should see the following message in the terminal:

.. code-block:: console

Hello World! bg27_rb4110b

Bluetooth

To use Bluetooth functionality, run the command below to retrieve necessary binary blobs from the Silicon Labs HAL repository.

.. code-block:: console

west blobs fetch hal_silabs

Then build the Zephyr kernel and a Bluetooth sample with the following command. The :zephyr:code-sample:bluetooth_observer sample application is used in this example.

.. zephyr-app-commands:: :zephyr-app: samples/bluetooth/observer :board: bg27_rb4110b :goals: build