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boards: silabs: Add support for rb4342a
Radio Board 4342A is really similar to the 4338A. There are a few difference on the pinmux, but most of the peripherals and the SoC are the same. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
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‎boards/silabs/radio_boards/siwx917_rb4342a/Kconfig.siwx917_rb4342a

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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_SIWX917_RB4342A
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select SOC_PART_NUMBER_SIWG917M111MGTBA

‎boards/silabs/radio_boards/siwx917_rb4342a/board.cmake

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# Copyright (c) 2025 Silicon Laboratories Inc.
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# SPDX-License-Identifier: Apache-2.0
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board_runner_args(silabs_commander "--device=SiWG917M111GTBA" "--file-type=bin"
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"--file=${PROJECT_BINARY_DIR}/${KERNEL_BIN_NAME}.rps")
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include(${ZEPHYR_BASE}/boards/common/silabs_commander.board.cmake)
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# It is not possible to load/flash a firmware using JLink, but it is possible to
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# debug a firmware with:
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# west attach -r jlink
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# Once started, it should be possible to reset the device with "monitor reset"
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board_runner_args(jlink "--device=Si917" "--speed=10000")
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include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

‎boards/silabs/radio_boards/siwx917_rb4342a/board.yml

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board:
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name: siwx917_rb4342a
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full_name: SiWx917 Wi-Fi 6 and Bluetooth LE 8 MB Flash + 8 MB ext PSRAM Radio Board (SLWRB4342A)
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vendor: silabs
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socs:
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- name: siwg917m111mgtba

‎boards/silabs/radio_boards/siwx917_rb4342a/doc/index.rst

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.. zephyr:board:: siwx917_rb4342a
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Overview
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********
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The SiWx917-RB4342A (aka BRD4342A) radio board provides support for the Silicon
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Labs SiWG917 SoC. This board cannot be used stand-alone and requires a a
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`Wireless Pro Kit`_ Mainboard (Si-MB4002A aka BRD4002A), for power, debug
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options etc.
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SiWG917 is an ultra-low power SoC that includes hardware support for Single-Band
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Wi-Fi 6 + Bluetooth LE 5.4, Matter...
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Hardware
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********
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For more information about the SiWG917 SoC and BRD4342A board, refer to these
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documents:
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- `SiWG917 Website`_
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- `SiWG917 Datasheet`_
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- `SiWG917 Reference Manual`_
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- `BRD4342A Website`_
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- `BRD4342A User Guide`_
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Supported Features
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==================
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.. zephyr:board-supported-hw::
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Programming and Debugging
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*************************
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Flashing
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========
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Applications for the ``siwx917_rb4342a`` board can be built in the usual
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way. The flash method requires on `Simplicity Commander`_ installed on the host.
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Then, connect the BRD4002A board with a mounted BRD4342A radio module to your
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host 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: siwx917_rb4342a
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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! siwx917_rb4342a
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Debugging
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=========
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Debuggning relies on JLink tool. JLink is not able to flash the firmware. So
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debug session has to be done in two steps. ``west flash`` will flahs the
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firmware using Simplicity Commander. Then ``west attach`` will use JLink to
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attach to the board. The Zephyr image may has already booted when user runs
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``west attach``. User may execute ``monitor reset`` in the gdb prompt to reset
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the board.
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.. _SiWx917-PK6031A:
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https://www.silabs.com/development-tools/wireless/wi-fi/siwx917-pk6031a-wifi-6-bluetooth-le-soc-pro-kit
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.. _Wireless Pro Kit:
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https://www.silabs.com/development-tools/wireless/wireless-pro-kit-mainboard
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.. _BRD4342A Website:
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https://www.silabs.com/development-tools/wireless/wi-fi/siwx91x-rb4342a-wifi-6-bluetooth-le-soc-radio-board
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.. _BRD4342A User Guide:
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https://www.silabs.com/documents/public/user-guides/ug564-brd4342a-user-guide.pdf
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.. _SiWG917 Website:
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https://www.silabs.com/wireless/wi-fi/siwx917-wireless-socs
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.. _SiWG917 Datasheet:
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https://www.silabs.com/documents/public/data-sheets/siwg917-datasheet.pdf
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.. _SiWG917 Reference Manual:
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https://www.silabs.com/documents/public/reference-manuals/siw917x-family-rm.pdf
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.. _Simplicity Commander:
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https://www.silabs.com/developer-tools/simplicity-studio/simplicity-commander

‎boards/silabs/radio_boards/siwx917_rb4342a/doc/siwx917_rb4342a.webp

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‎boards/silabs/radio_boards/siwx917_rb4342a/siwx917_rb4342a.dts

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/*
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* Copyright (c) 2023 Antmicro
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* Copyright (c) 2025 Silicon Laboratories Inc.
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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/siwg917m111mgtba.dtsi>
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/input/input-event-codes.h>
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#include <dt-bindings/memory-attr/memory-attr-arm.h>
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#include <dt-bindings/pinctrl/silabs/siwx91x-pinctrl.h>
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#include <common/freq.h>
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/ {
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model = "Silicon Labs BRD4342A (SiWG917 Radio Board)";
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compatible = "silabs,x917_rb4342a", "silabs,siwg917";
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chosen {
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zephyr,sram = &sram0;
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zephyr,code-partition = &code_partition;
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zephyr,console = &ulpuart;
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zephyr,shell-uart = &ulpuart;
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zephyr,uart-pipe = &ulpuart;
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zephyr,bt-hci = &bt_hci0;
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};
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aliases {
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led0 = &led0;
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sw0 = &button0;
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dht0 = &si7021;
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};
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leds {
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compatible = "gpio-leds";
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led0: led_0 {
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gpios = <&ulpgpio 2 GPIO_ACTIVE_HIGH>;
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};
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};
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buttons {
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compatible = "gpio-keys";
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button0: button_0 {
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gpios = <&uulpgpio 2 GPIO_ACTIVE_LOW>;
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zephyr,code = <INPUT_KEY_0>;
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};
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};
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};
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&pinctrl0 {
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ulpuart_default: ulpuart_default {
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out {
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pinmux = <ULPUART_TX_ULP11>;
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};
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in {
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pinmux = <ULPUART_RX_ULP9>;
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};
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};
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ulpi2c_default: ulpi2c_default {
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group {
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pinmux = <ULPI2C_SDA_ULP6>, <ULPI2C_SCL_ULP7>;
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};
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};
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};
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&ulpuart {
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status = "okay";
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pinctrl-0 = <&ulpuart_default>;
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pinctrl-names = "default";
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};
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&ulpi2c {
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status = "okay";
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pinctrl-0 = <&ulpi2c_default>;
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pinctrl-names = "default";
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clock-frequency = <DT_FREQ_K(100)>;
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si7021: si7021@40 {
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compatible = "silabs,si7006";
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reg = <0x40>;
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};
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};
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&flash0 {
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partitions {
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compatible = "fixed-partitions";
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#address-cells = <1>;
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#size-cells = <1>;
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code_partition: partition@0 {
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label = "code_partition";
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reg = <0x0000000 DT_SIZE_K(2008)>;
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};
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storage_partition: partition@1f6000 {
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label = "storage";
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reg = <0x001f6000 DT_SIZE_K(32)>;
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};
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};
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};
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&bt_hci0 {
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status = "okay";
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};
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&wifi0 {
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status = "okay";
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};

‎boards/silabs/radio_boards/siwx917_rb4342a/siwx917_rb4342a.yaml

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identifier: siwx917_rb4342a
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name: |
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SiWx917 Wi-Fi 6 and Bluetooth LE 8 MB Flash + 8 MB ext PSRAM Radio Board
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(SLWRB4342A, BRD4342A)
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type: mcu
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arch: arm
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ram: 8864
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flash: 1024
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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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- dma
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- entropy
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- flash
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- gpio
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- i2c
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- pwm
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- watchdog
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- wifi
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vendor: silabs

‎boards/silabs/radio_boards/siwx917_rb4342a/siwx917_rb4342a_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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CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=180000000
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CONFIG_USE_DT_CODE_PARTITION=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_CLOCK_CONTROL=y

‎samples/drivers/watchdog/boards/siwx917_rb4342a.overlay

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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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/ {
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aliases {
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watchdog0 = &watchdog;
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};
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};
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&watchdog {
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status = "okay";
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};

‎tests/drivers/watchdog/wdt_basic_api/boards/siwx917_rb4342a.overlay

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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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&watchdog {
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status = "okay";
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};

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