EFR32 BRD4187C (xG24-RB4187C)

Overview

The EFR32MG24 Mighty Gecko Radio Board is one of the two radio boards delivered with xG24-PK6010A Website. It contains a Wireless System-On-Chip from the EFR32MG24 family built on an ARM Cortex®-M33F processor with excellent low power capabilities.

xG24-RB4187C Mighty Gecko Radio Board

xG24-RB4187C (image courtesy of Silicon Labs)

The BRD4187C a.k.a. xG24-RB4187C radio board plugs into the Wireless Pro Kit Mainboard BRD4002A and is supported as one of EFR32 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 board configuration supports the following hardware features:

Interface

Controller

Driver/Component

MPU

on-chip

memory protection unit

NVIC

on-chip

nested vector interrupt controller

SYSTICK

on-chip

systick

COUNTER

on-chip

stimer

FLASH

on-chip

flash memory

GPIO

on-chip

gpio

UART

on-chip

serial

I2C

on-chip

i2c

TRNG

on-chip

semailbox

WATCHDOG

on-chip

watchdog

Other hardware features are currently not supported by the port.

Connections and IOs

In the following table, the column Name contains Pin names. For example, PA2 means Pin number 2 on PORTA, as used in the board’s datasheets and manuals.

Name

Function

Usage

PB2

GPIO

LED0

PB4

GPIO

LED1

PB1

GPIO

Push Button 0

PB3

GPIO

Push Button 1

PB0

GPIO

Board Controller Enable VCOM_ENABLE

PA8

USART0_TX

UART Console VCOM_TX US0_TX

PA9

USART0_RX

UART Console VCOM_RX US0_RX

The default configuration can be found in boards/silabs/efr32_radio/efr32_radio_efr32mg24b220f1536im48_defconfig

System Clock

The EFR32MG24 SoC is configured to use the 39 MHz external 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

Please refer to Programming and Debugging EFR32 Radio Board for details on the supported debug interfaces.

Flashing

Connect the BRD4002A board with a mounted BRD4187C radio module 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 efr32_radio/efr32mg24b220f1536im48 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! efr32_radio