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Overview

boards/silabs/radio_boards/xg22/doc/slwrb4182a.rst

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.. zephyr:board:: slwrb4182a

Overview

The EFR32xG22 Wireless Gecko 2.4 GHz +6 dBm Radio Board_ is available standalone and as part of the EFR32xG22 Wireless Gecko Starter Kit_. It is a complete reference design for the EFR32xG22 Wireless SoC, with matching network and a PCB antenna for 6 dBm output power in the 2.4 GHz band.

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

.. _EFR32xG22 Wireless Gecko 2.4 GHz +6 dBm Radio Board: https://www.silabs.com/development-tools/wireless/slwrb4182a-efr32xg22-wireless-gecko-radio-board

.. _EFR32xG22 Wireless Gecko Starter Kit: https://www.silabs.com/development-tools/wireless/efr32xg22-wireless-starter-kit

Hardware

  • EFR32MG22C224F512IM40 SoC
  • CPU core: ARM Cortex®-M33 with FPU, DSP and TrustZone
  • Memory: 512 kB Flash, 32 kB RAM
  • Transmit power: up to +6 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 EFR32MG22 SoC and BRD4182A board, refer to these documents:

  • SLWRB4182A User Guide <https://www.silabs.com/documents/public/reference-manuals/brd4182a-rm.pdf>__
  • EFR32xG22 Reference Manual <https://www.silabs.com/documents/public/reference-manuals/efr32xg22-rm.pdf>__
  • EFR32MG22 Datasheet <https://www.silabs.com/documents/public/data-sheets/efr32mg22-datasheet.pdf>__

Supported Features

.. zephyr:board-supported-hw::

System Clock

The EFR32MG22 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 EFR32MG22 SoC has two USARTs and one EUART. USART1 is connected to the board controller and is used for the console.

Programming and Debugging

.. zephyr:board-supported-runners ::

Connect the BRD4001A mainboard with a mounted BRD4182A 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: slwrb4182a :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! slwrb4182a

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: slwrb4182a :goals: build