This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

xG24-DK2601B

Overview

The EFR32MG24 Mighty Gecko Board dev kit contains a Wireless System-On-Chip from the EFR32MG24 family built on an ARM Cortex®-M33F processor with excellent low power capabilities.

SLWRB4180A Mighty Gecko Radio Board

xG24-DK2601B (image courtesy of Silicon Labs)

Hardware

  • EFR32MG24B310F1536IM48-B 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 (38.4 MHz).

For more information about the EFR32MG24 SoC and BRD2601B 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

TRNG

on-chip

semailbox

WATCHDOG

on-chip

watchdog

I2C(M/S)

on-chip

i2c

RADIO

on-chip

bluetooth

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

PA4

GPIO

LED0

PB0

GPIO

LED1

PB2

GPIO

Push Button 0

PB3

GPIO

Push Button 1

PA5

USART0_TX

UART Console EFM_BC_TX US0_TX

PA6

USART0_RX

UART Console EFM_BC_RX US0_RX

The default configuration can be found in the defconfig file:

boards/arm/efr32xg24_dk2601b/efr32xg24_dk2601b_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

Note

Before using the kit the first time, you should update the J-Link firmware from J-Link-Downloads

Flashing

The sample application Hello World is used for this example. Build the Zephyr kernel and application:

# From the root of the zephyr repository
west build -b efr32xg24_dk2601b samples/hello_world

Connect the efr32xg24_dk2601b 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:

Hello World! efr32xg24_dk2601b

Bluetooth

To use the BLE function, run the command below to retrieve necessary binary blobs from the SiLabs HAL repository.

west blobs fetch silabs

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

# From the root of the zephyr repository
west build -b efr32xg24_dk2601b samples/bluetooth/observer