xGM240P 10 dBm Module Radio Board (xGM240-RB4316A)

Overview

The xGM240P +10 dBm Module Radio Board for the xGM240P module 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

  • MGM240PB32VNA module based on EFR32MG24

  • CPU core: ARM Cortex®-M33 with FPU

  • Flash memory: 1536 kB

  • RAM: 256 kB

  • Transmit power: up to +10 dBm

  • Operation frequency: 2.4 GHz

  • Crystal for LFXO (32.768 kHz) on the board and HFXO (39 MHz) in the module.

For more information about the MGM240P module, EFR32MG24 SoC and BRD4316A board, refer to these documents:

Supported Features

The xgm240_rb4316a 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 MGM240P module 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 MGM240P module has one USART and two EUSARTs. USART0 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

The xgm240_rb4316a board supports the runners and associated west commands listed below.

flash debug

Flashing

Connect the BRD4002A board with a mounted BRD4186C 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 xgm240_rb4316a 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! xgm240_rb4316a

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 xgm240_rb4316a samples/bluetooth/observer