EFR32xG24 2.4 GHz 20 dBm (xG24-RB4187C)

Overview

The EFR32xG24 +20 dBm Radio Board is the radio board delivered with the EFR32xG24 Pro Kit +20 dBm, and is also available standalone. It contains a Wireless System-On-Chip from the EFR32MG24 family built on an ARM Cortex®-M33 processor with excellent low power capabilities.

The radio board plugs into the Wireless Pro Kit Mainboard BRD4002A and is supported in Zephyr as one of several Radio Boards.

Hardware

  • EFR32MG24B220F1536IM48 Mighty Gecko SoC

  • CPU core: ARM Cortex®-M33 with FPU

  • Flash memory: 1536 kB

  • RAM: 256 kB

  • Transmit power: up to +20 dBm

  • Operation frequency: 2.4 GHz

  • Crystals for LFXO (32.768 kHz) and HFXO (39 MHz).

For more information about the EFR32MG24 SoC and BRD4187C board, refer to these documents:

Supported Features

The xg24_rb4187c board supports the hardware features listed below.

on-chip / on-board
Feature integrated in the SoC / present on the board.
2 / 2
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

System Clock

The EFR32MG24 SoC is configured to use the HFRCODPLL oscillator at 78 MHz as the system clock, locked to the 39 MHz external crystal oscillator on the board.

Serial Port

The EFR32MG24 SoC has one USART and two EUSARTs. USART0 is connected to the board controller and is used for the console.

Programming and Debugging

The xg24_rb4187c board supports the runners and associated west commands listed below.

flash debug

Flashing

Connect the BRD4002A board with a mounted BRD4187C radio board to your host computer using the USB port.

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b xg24_rb4187c samples/hello_world
west 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:

Hello World! xg24_rb4187c

Bluetooth

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

west blobs fetch hal_silabs

Then build the Zephyr kernel and a Bluetooth sample with the following command. The Observer sample application is used in this example.

# From the root of the zephyr repository
west build -b xg24_rb4187c samples/bluetooth/observer