SPARKFUN THING PLUS MATTER

Overview

The MGM240P Mighty Sparkfun Think Plus Matter contains a Wireless System-On-Chip from the EFR32MG24 family built on an ARM Cortex®-M33F processor with excellent low power capabilities.

xG24-MGM240P (image courtesy of Sparkfun)

Hardware

• Based on the Series 2 EFR32MG24 SoC

• CPU core: 32-bit ARM® Cortex®-M33 core at 39 MHz

• Flash memory: 1536 kB

• RAM: 256 kB

• Supports Multiple 802.15.4 Wireless Protocols (Zigbee and OpenThread)

• Bluetooth Low Energy 5.3

• Crystals for LFXO (32 kHz) and HFXO (39 MHz).

For more information about the EFR32MG24 SoC and BRD2601B board, refer to these documents:

• EFR32MG24 Website

• EFR32MG24 Datasheet

• EFR32xG24 Reference Manual

• MGM240P Datasheet

• MGM240P Schematics

Supported Features

The board configuration supports the following hardware features:

Interface	Controller	Driver/Component
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
PA8	GPIO	LED0
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 boards/silabs/sparkfun_thing_plus_mgm240p/sparkfun_thing_plus_mgm240p_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 sparkfun_thing_plus_mgm240p samples/hello_world

Connect the sparkfun_thing_plus_mgm240p 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! _sparkfun_thing_plus_mgm240p

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 Observer sample application is used in this example.

# From the root of the zephyr repository
west build -b sparkfun_thing_plus_mgm240p samples/bluetooth/observer