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boards: silabs: Add xg24_rb4186c board
Add support for xG24-RB4186C, a 10 dBm radio board using the EFR32MG24 SoC. Pinout is mostly identical to RB4187C, so share devicetree definitions between them. Signed-off-by: Aksel Skauge Mellbye <aksel.mellbye@silabs.com>
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‎boards/silabs/radio_boards/xg24/Kconfig.defconfig‎

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# Copyright (c) 2025 Silicon Laboratories Inc.
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# SPDX-License-Identifier: Apache-2.0
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if BOARD_XG24_RB4187C
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if BOARD_XG24_RB4186C || BOARD_XG24_RB4187C
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config LOG_BACKEND_SWO_FREQ_HZ
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default 875000

‎boards/silabs/radio_boards/xg24/Kconfig.xg24_rb4186c‎

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# Copyright (c) 2025 Silicon Laboratories Inc.
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# SPDX-License-Identifier: Apache-2.0
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config BOARD_XG24_RB4186C
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select SOC_EFR32MG24B210F1536IM48

‎boards/silabs/radio_boards/xg24/board.yml‎

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board:
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name: xg24_rb4187c
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full_name: EFR32xG24 2.4 GHz 20 dBm (xG24-RB4187C)
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vendor: silabs
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socs:
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- name: efr32mg24b220f1536im48
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boards:
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- name: xg24_rb4186c
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full_name: EFR32xG24 2.4 GHz 10 dBm (xG24-RB4186C)
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vendor: silabs
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socs:
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- name: efr32mg24b210f1536im48
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- name: xg24_rb4187c
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full_name: EFR32xG24 2.4 GHz 20 dBm (xG24-RB4187C)
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vendor: silabs
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socs:
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- name: efr32mg24b220f1536im48

‎boards/silabs/radio_boards/xg24/doc/xg24_rb4186c.rst‎

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.. zephyr:board:: xg24_rb4186c
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Overview
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********
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The `EFR32xG24 +10 dBm Radio Board`_ is the radio board delivered with the
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`EFR32xG24 Pro Kit +10 dBm`_, and is also available standalone. It contains a Wireless
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System-On-Chip from the EFR32MG24 family built on an ARM Cortex®-M33 processor with excellent low
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power capabilities.
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The radio board plugs into the Wireless Pro Kit Mainboard BRD4002A and is supported in Zephyr as one
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of several :ref:`silabs_radio_boards`.
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.. _EFR32xG24 +10 dBm Radio Board:
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https://www.silabs.com/development-tools/wireless/xg24-rb4186c-efr32xg24-wireless-gecko-radio-board
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.. _EFR32xG24 Pro Kit +10 dBm:
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https://www.silabs.com/development-tools/wireless/efr32xg24-pro-kit-10-dbm
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Hardware
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********
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- EFR32MG24B210F1536IM48 Mighty Gecko SoC
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- CPU core: ARM Cortex®-M33 with FPU
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- Flash memory: 1536 kB
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- RAM: 256 kB
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- Transmit power: up to +10 dBm
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- Operation frequency: 2.4 GHz
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- Crystals for LFXO (32.768 kHz) and HFXO (39 MHz).
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For more information about the EFR32MG24 SoC and BRD4186C board, refer to these
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documents:
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- `EFR32MG24 Website`_
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- `EFR32MG24 Datasheet`_
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- `EFR32xG24 Reference Manual`_
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- `BRD4186C User Guide`_
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.. _EFR32MG24 Website:
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https://www.silabs.com/wireless/zigbee/efr32mg24-series-2-socs
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.. _EFR32MG24 Datasheet:
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https://www.silabs.com/documents/public/data-sheets/efr32mg24-datasheet.pdf
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.. _EFR32xG24 Reference Manual:
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https://www.silabs.com/documents/public/reference-manuals/efr32xg24-rm.pdf
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.. _BRD4186C User Guide:
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https://www.silabs.com/documents/public/reference-manuals/brd4186c-rm.pdf
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Supported Features
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==================
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.. zephyr:board-supported-hw::
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System Clock
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============
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The EFR32MG24 SoC is configured to use the HFRCODPLL oscillator at 78 MHz as the system clock,
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locked to the 39 MHz external crystal oscillator on the board.
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Serial Port
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===========
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The EFR32MG24 SoC has one USART and two EUSARTs.
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USART0 is connected to the board controller and is used for the console.
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Programming and Debugging
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*************************
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.. zephyr:board-supported-runners::
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Flashing
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========
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Connect the BRD4002A board with a mounted BRD4186C radio board to your host
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computer using the USB port.
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Here is an example for the :zephyr:code-sample:`hello_world` application.
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: xg24_rb4186c
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:goals: flash
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Open a serial terminal (minicom, putty, etc.) with the following settings:
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- Speed: 115200
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- Data: 8 bits
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- Parity: None
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- Stop bits: 1
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Reset the board and you should see the following message in the terminal:
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.. code-block:: console
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Hello World! xg24_rb4186c
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Bluetooth
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=========
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To use Bluetooth functionality, run the command below to retrieve necessary binary
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blobs from the Silicon Labs HAL repository.
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.. code-block:: console
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west blobs fetch hal_silabs
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Then build the Zephyr kernel and a Bluetooth sample with the following
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command. The :zephyr:code-sample:`bluetooth_observer` sample application is used in
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this example.
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.. zephyr-app-commands::
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:zephyr-app: samples/bluetooth/observer
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:board: xg24_rb4186c
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:goals: build

‎boards/silabs/radio_boards/xg24/doc/xg24_rb4186c.webp‎

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‎boards/silabs/radio_boards/xg24/xg24_rb4186c.dts‎

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/*
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* Copyright (c) 2025 Silicon Laboratories Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/dts-v1/;
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#include <silabs/xg24/efr32mg24b210f1536im48.dtsi>
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#include "xg24_rb418xc.dtsi"
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/ {
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model = "Silicon Labs EFR32xG24 2.4 GHz 10 dBm Radio Board (xG24-RB4186C, BRD4186C)";
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compatible = "silabs,xg24_rb4186c", "silabs,efr32mg24";
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};
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&dcdc {
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silabs,pfmx-peak-current-milliamp = <120>;
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};
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&radio {
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pa-voltage-mv = <1800>;
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};

‎boards/silabs/radio_boards/xg24/xg24_rb4186c.yaml‎

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identifier: xg24_rb4186c
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name: EFR32xG24 2.4 GHz 10 dBm Radio Board (xG24-RB4186C, BRD4186C)
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type: mcu
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arch: arm
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ram: 256
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flash: 1536
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toolchain:
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- zephyr
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- gnuarmemb
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supported:
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- bluetooth
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- comparator
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- counter
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- dac
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- dma
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- entropy
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- flash
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- gpio
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- pwm
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- spi
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- uart
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- watchdog
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vendor: silabs

‎boards/silabs/radio_boards/xg24/xg24_rb4186c_defconfig‎

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# SPDX-License-Identifier: Apache-2.0
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CONFIG_ARM_MPU=y
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CONFIG_CONSOLE=y
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CONFIG_UART_CONSOLE=y
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CONFIG_SERIAL=y
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CONFIG_GPIO=y

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