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boards: silabs: Add xG29-RB4412A radio board
Add radio board for EFR32MG29 device. Signed-off-by: Aksel Skauge Mellbye <[email protected]>
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‎boards/silabs/radio_boards/xg29_rb4412a/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_XG29_RB4412A
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config LOG_BACKEND_SWO_FREQ_HZ
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default 875000
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depends on LOG_BACKEND_SWO
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if SOC_GECKO_USE_RAIL
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config FPU
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default y
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endif # SOC_GECKO_USE_RAIL
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if BT
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config FPU
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default y
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config COMMON_LIBC_MALLOC_ARENA_SIZE
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default 8192
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config MAIN_STACK_SIZE
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default 3072 if PM
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default 2304
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endif # BT
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endif # BOARD_XG29_RB4412A

‎boards/silabs/radio_boards/xg29_rb4412a/Kconfig.xg29_rb4412a

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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_XG29_RB4412A
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select SOC_PART_NUMBER_EFR32MG29B140F1024IM40

‎boards/silabs/radio_boards/xg29_rb4412a/board.cmake

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# SPDX-License-Identifier: Apache-2.0
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board_runner_args(jlink "--device=EFR32MG29BxxxF1024")
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include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)
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board_runner_args(silabs_commander "--device=EFR32MG29B140F1024IM40")
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include(${ZEPHYR_BASE}/boards/common/silabs_commander.board.cmake)

‎boards/silabs/radio_boards/xg29_rb4412a/board.yml

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board:
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name: xg29_rb4412a
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full_name: EFR32xG29 2.4 GHz 8 dBm Buck (xG29-RB4412A)
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vendor: silabs
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socs:
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- name: efr32mg29b140f1024im40

‎boards/silabs/radio_boards/xg29_rb4412a/doc/index.rst

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.. zephyr:board:: xg29_rb4412a
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Overview
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********
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The xG24-RB4412A radio board provides support for the Silicon Labs EFR32MG29 SoC.
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Hardware
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********
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- EFR32MG29B140F1024IM40 SoC
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- CPU core: ARM Cortex®-M33 with FPU
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- Flash memory: 1024 kB
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- RAM: 256 kB
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- Transmit power: up to +8 dBm
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- Operation frequency: 2.4 GHz
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- Crystal oscillators for LFXO (32.768 kHz) and HFXO (38.4 MHz)
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Supported Features
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==================
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The ``xg29_rb4412a`` board target supports the following hardware features:
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+-----------+------------+------------------------+
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| Interface | Controller | Driver/Component |
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+===========+============+========================+
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| CMU | on-chip | clock control |
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+-----------+------------+------------------------+
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| MSC | on-chip | flash |
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+-----------+------------+------------------------+
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| GPIO | on-chip | gpio, pin control |
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+-----------+------------+------------------------+
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| RTCC | on-chip | system clock, counter |
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+-----------+------------+------------------------+
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| MPU | on-chip | memory protection unit |
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+-----------+------------+------------------------+
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| NVIC | on-chip | interrupt controller |
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+-----------+------------+------------------------+
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| USART | on-chip | serial, spi |
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+-----------+------------+------------------------+
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| EUSART | on-chip | serial, spi |
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+-----------+------------+------------------------+
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| I2C | on-chip | i2c |
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+-----------+------------+------------------------+
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| LDMA | on-chip | dma |
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+-----------+------------+------------------------+
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| WDOG | on-chip | watchdog |
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+-----------+------------+------------------------+
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| SE | on-chip | entropy |
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+-----------+------------+------------------------+
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| RADIO | on-chip | bluetooth |
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+-----------+------------+------------------------+
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Programming and Debugging
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*************************
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Applications for the ``xg29_rb4412a`` board target can be built, flashed, and debugged in the
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usual way. See :ref:`build_an_application` and :ref:`application_run` for more details on
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building and running.
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Flashing
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========
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As an example, this section shows how to build and flash the :zephyr:code-sample:`hello_world`
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application.
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To build and program the sample to the xG24-RB4412A, complete the following steps:
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First, plug the xG24-RB4412A to a compatible mainboard and connect the mainboard to your computer
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using the USB port on the left side.
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Next, build and flash the sample by running the following command:
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: xg29_rb4412a
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:goals: build flash
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``west flash`` will by default use SEGGER JLink. Make sure that the JLinkExe binary is available on
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the PATH. Alternatively, use ``west flash -r silabs_commander`` to use Simplicity Commander to flash.
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In this case, make sure that the commander binary is available on PATH.
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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! xg29_rb4412a
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Bluetooth
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=========
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To use the BLE function, run the command below to retrieve necessary binary
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blobs from the SiLabs 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: xg29_rb4412a
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:goals: build

‎boards/silabs/radio_boards/xg29_rb4412a/pre_dt_board.cmake

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# Copyright (c) 2021 Linaro Limited
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# SPDX-License-Identifier: Apache-2.0
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# SPI is implemented via usart/eusart so node name isn't spi@...
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list(APPEND EXTRA_DTC_FLAGS "-Wno-spi_bus_bridge")

‎boards/silabs/radio_boards/xg29_rb4412a/xg29_rb4412a-pinctrl.dtsi

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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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#include <dt-bindings/pinctrl/silabs/xg29-pinctrl.h>
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&pinctrl {
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usart1_default: usart1_default {
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group0 {
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pins = <USART1_TX_PA5>;
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drive-push-pull;
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output-high;
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};
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group1 {
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pins = <USART1_RX_PA6>;
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input-enable;
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silabs,input-filter;
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};
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};
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eusart1_default: eusart1_default {
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group0 {
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pins = <EUSART1_TX_PC0>, <EUSART1_SCLK_PC2>;
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drive-push-pull;
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output-high;
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};
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group1 {
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pins = <EUSART1_RX_PC1>;
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input-enable;
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silabs,input-filter;
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};
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};
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i2c0_default: i2c0_default {
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group0 {
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pins = <I2C0_SCL_PB2>, <I2C0_SDA_PB3>;
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drive-open-drain;
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bias-pull-up;
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};
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};
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};

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