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boards/silabs/explorer_kits/xg22/doc/bgm220_ek4314a.rst

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.. zephyr:board:: bgm220_ek4314a

Overview

The BGM220 Explorer Kit is a small form factor development and evaluation platform for the BGM220P Bluetooth Module.

The kit features a USB interface, an on-board SEGGER J-Link debugger, one user-LED and button, and support for hardware add-on boards via a mikroBus socket and a Qwiic connector.

Hardware

  • BGM220PC22HNA module

    • EFR32BG22 SoC
    • Crystal for HFXO (38.4 MHz)
    • Crystal for LFXO (32768 Hz)

  • CPU core: ARM Cortex®-M33 with FPU

  • Flash memory: 512 kB

  • RAM: 32 kB

  • Transmit power: up to +8 dBm

  • Operation frequency: 2.4 GHz

For more information about the BGM220P module and Explorer Kit, refer to these documents:

  • BGM220 Website_
  • BGM220P Datasheet_
  • EFR32xG22 Reference Manual_
  • BGM220 Explorer Kit User's Guide_

Supported Features

.. zephyr:board-supported-hw::

System Clock

The system is configured to use the HFRCODPLL oscillator at 76.8 MHz as the system clock, locked to the 38.4 MHz crystal oscillator in the module.

Serial Port

The BGM220P module 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::

.. note:: Before using the kit the first time, you should update the J-Link firmware in Simplicity Studio.

Flashing

The sample application :zephyr:code-sample:hello_world is used for this example. Build the Zephyr kernel and application:

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: bgm220_ek4314a :goals: build

Connect the board to your host computer using the USB port and you should see a USB connection.

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'll see the following message on the corresponding serial port terminal session:

.. code-block:: console

Hello World! bgm220_ek4314a/bgm220pc22hna

Bluetooth

To use BLE 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: bgm220_ek4314a :goals: build

.. _BGM220 Website: https://www.silabs.com/wireless/bluetooth/efr32bg22-series-2-modules

.. _BGM220P Datasheet: https://www.silabs.com/documents/public/data-sheets/bgm220p-datasheet.pdf

.. _EFR32xG22 Reference Manual: https://www.silabs.com/documents/public/reference-manuals/efr32xg22-rm.pdf

.. _BGM220 Explorer Kit User's Guide: https://www.silabs.com/documents/public/user-guides/ug465-brd4314a.pdf