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boards/silabs/radio_boards/bg29_rb4420a/doc/index.rst

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.. zephyr:board:: bg29_rb4420a

Overview

The EFR32BG29 Bluetooth LE +4 dBm DCDC Boost WLCSP Radio Board 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 DCDC Boost mode EFR32xG29 Wireless SoC, a matching network and a PCB antenna for 4 dBm output power in the 2.4 GHz band. The EFR32 on the radio board is powered in boost DC-DC configuration from an on-board LDO for improved efficiency and to demonstrate single-cell operation. See :ref:silabs_radio_boards for more information about the Wireless Mainboard platform.

Hardware

  • EFR32BG29B220F1024CJ45 SoC
  • CPU core: ARM Cortex®-M33 with FPU, DSP and TrustZone
  • Memory: 1024 kB Flash, 256 kB RAM
  • Transmit power: up to +4 dBm
  • Operation frequency: 2.4 GHz
  • Crystals for LFXO (32.768 kHz) and HFXO (38.4 MHz)

For more information about the EFR32BG29 SoC and BRD4420A board, refer to these documents:

  • BG29-RB4420A Website_
  • BG29-RB4420A User Guide_
  • EFR32BG29 Website_
  • EFR32BG29 Datasheet_
  • EFR32BG29 Reference Manual_

Supported Features

.. zephyr:board-supported-hw::

System Clock

The EFR32BG29 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 EFR32BG29 SoC has two USARTs and two EUSARTs. USART1 is connected to the board controller and is used for the console.

Programming and Debugging

.. zephyr:board-supported-runners ::

Connect the BRD4002A mainboard with a mounted BRD4420A 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: bg29_rb4420a :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! bg29_rb4420a

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: bg29_rb4420a :goals: build

.. _BG29-RB4420A Website: https://www.silabs.com/development-tools/wireless/bluetooth/bg29-rb4420a-efr32bg29-bluetooth-le-dcdc-boost-wlcsp-radio-board?tab=overview

.. _BG29-RB4420A User Guide: https://www.silabs.com/documents/public/user-guides/ug623-efr32bg29-brd4420a-user-guide.pdf

.. _EFR32BG29 Website: https://www.silabs.com/wireless/bluetooth/efr32bg29-series-2-socs

.. _EFR32BG29 Datasheet: https://www.silabs.com/documents/public/data-sheets/efr32bg29-datasheet.pdf

.. _EFR32BG29 Reference Manual: https://www.silabs.com/documents/public/reference-manuals/efr32xg29-rm.pdf