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samples: zephyr: drivers: mbox: Enable sample on nRF54L09 and L20
Add copy of zephyr/samples/drivers/mbox that can be run on nRF54L09pdk and nRF54L20pdk. Signed-off-by: Sebastian Głąb <sebastian.glab@nordicsemi.no>
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‎CODEOWNERS

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/samples/zephyr/drivers/adc/ @nrfconnect/ncs-low-level-test
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/samples/zephyr/drivers/audio/dmic/ @nrfconnect/ncs-low-level-test
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/samples/zephyr/drivers/i2c/rtio_loopback/ @nrfconnect/ncs-low-level-test
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/samples/zephyr/drivers/mbox/ @nrfconnect/ncs-low-level-test
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/samples/zephyr/drivers/watchdog/ @nrfconnect/ncs-low-level-test
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/samples/zephyr/sensor/accel_polling/ @nrfconnect/ncs-low-level-test
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/samples/zephyr/sensor/bme680/ @nrfconnect/ncs-low-level-test

‎samples/zephyr/drivers/mbox/CMakeLists.txt

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#
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# Copyright (c) 2025 Nordic Semiconductor ASA
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#
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# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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#
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
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set(REMOTE_ZEPHYR_DIR ${CMAKE_CURRENT_BINARY_DIR}/../remote/zephyr)
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if(CONFIG_BOARD_NRF54L09PDK_NRF54L09_CPUAPP OR
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CONFIG_BOARD_NRF54L20PDK_NRF54L20_CPUAPP)
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message(STATUS "${BOARD}${BOARD_QUALIFIERS} compile as Main in this sample")
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else()
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message(FATAL_ERROR "${BOARD}${BOARD_QUALIFIERS} is not supported for this sample")
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endif()
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project(mbox_ipc)
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enable_language(C ASM)
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target_sources(app PRIVATE ${ZEPHYR_BASE}/samples/drivers/mbox/src/main.c)

‎samples/zephyr/drivers/mbox/Kconfig

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source "samples/drivers/mbox/Kconfig"

‎samples/zephyr/drivers/mbox/Kconfig.sysbuild

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#
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# Copyright (c) 2025 Nordic Semiconductor ASA
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#
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# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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#
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source "share/sysbuild/Kconfig"
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config REMOTE_BOARD
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string "Remote board"
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default "nrf54l09pdk/nrf54l09/cpuflpr" if $(BOARD) = "nrf54l09pdk"
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default "nrf54l20pdk/nrf54l20/cpuflpr" if $(BOARD) = "nrf54l20pdk"

‎samples/zephyr/drivers/mbox/README.txt

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This sample extends the same-named Zephyr sample to verify it with Nordic development kits.
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Source code and basic configuration files can be found in the corresponding folder structure in zephyr/samples/drivers/mbox.

‎samples/zephyr/drivers/mbox/boards/nrf54l09pdk_nrf54l09_cpuapp.overlay

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/*
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* Copyright 2025 Nordic Semiconductor ASA
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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/ {
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mbox-consumer {
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compatible = "vnd,mbox-consumer";
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mboxes = <&cpuapp_vevif_rx 20>, <&cpuapp_vevif_tx 21>;
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mbox-names = "rx", "tx";
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};
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};
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&cpuapp_vevif_rx {
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status = "okay";
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};
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&cpuapp_vevif_tx {
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status = "okay";
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};

‎samples/zephyr/drivers/mbox/boards/nrf54l20pdk_nrf54l20_cpuapp.overlay

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/*
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* Copyright 2025 Nordic Semiconductor ASA
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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/ {
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mbox-consumer {
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compatible = "vnd,mbox-consumer";
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mboxes = <&cpuapp_vevif_rx 20>, <&cpuapp_vevif_tx 21>;
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mbox-names = "rx", "tx";
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};
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};
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&cpuapp_vevif_rx {
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status = "okay";
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};
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&cpuapp_vevif_tx {
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status = "okay";
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};

‎samples/zephyr/drivers/mbox/prj.conf

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CONFIG_PRINTK=y
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CONFIG_MBOX=y

‎samples/zephyr/drivers/mbox/remote/CMakeLists.txt

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#
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# Copyright (c) 2021 Carlo Caione <ccaione@baylibre.com>
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# Copyright 2023-2025 NXP
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#
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# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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#
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
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if(CONFIG_BOARD_NRF54L09PDK_NRF54L09_CPUFLPR OR
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CONFIG_BOARD_NRF54L20PDK_NRF54L20_CPUFLPR)
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message(STATUS "${BOARD}${BOARD_QUALIFIERS} compile as remote in this sample")
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else()
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message(FATAL_ERROR "${BOARD}${BOARD_QUALIFIERS} is not supported for this sample")
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endif()
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project(mbox_ipc_remote)
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target_sources(app PRIVATE ${ZEPHYR_BASE}/samples/drivers/mbox/remote/src/main.c)

‎samples/zephyr/drivers/mbox/remote/Kconfig

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source "samples/drivers/mbox/remote/Kconfig"

‎samples/zephyr/drivers/mbox/remote/boards/nrf54l09pdk_nrf54l09_cpuflpr.overlay

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/*
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* Copyright 2025 Nordic Semiconductor ASA
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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/ {
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mbox-consumer {
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compatible = "vnd,mbox-consumer";
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mboxes = <&cpuflpr_vevif_rx 21>, <&cpuflpr_vevif_tx 20>;
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mbox-names = "rx", "tx";
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};
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};
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&cpuflpr_vevif_rx {
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status = "okay";
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};
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&cpuflpr_vevif_tx {
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status = "okay";
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};
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&uart30 {
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/delete-property/ hw-flow-control;
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};

‎samples/zephyr/drivers/mbox/remote/boards/nrf54l20pdk_nrf54l20_cpuflpr.overlay

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/*
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* Copyright 2025 Nordic Semiconductor ASA
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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/ {
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mbox-consumer {
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compatible = "vnd,mbox-consumer";
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mboxes = <&cpuflpr_vevif_rx 21>, <&cpuflpr_vevif_tx 20>;
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mbox-names = "rx", "tx";
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};
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};
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&cpuflpr_vevif_rx {
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status = "okay";
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};
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&cpuflpr_vevif_tx {
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status = "okay";
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};
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&uart30 {
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/delete-property/ hw-flow-control;
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};

‎samples/zephyr/drivers/mbox/remote/prj.conf

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CONFIG_STDOUT_CONSOLE=n
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CONFIG_MBOX=y

‎samples/zephyr/drivers/mbox/sample.yaml

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sample:
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name: MBOX IPC sample
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common:
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sysbuild: true
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tags:
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- mbox
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- ci_samples_zephyr_drivers_mbox
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timeout: 30
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tests:
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nrf.extended.sample.drivers.mbox.nrf54l:
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platform_allow:
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- nrf54l09pdk/nrf54l09/cpuapp
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- nrf54l20pdk/nrf54l20/cpuapp
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integration_platforms:
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- nrf54l20pdk/nrf54l20/cpuapp
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extra_args: mbox_SNIPPET=nordic-flpr
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sysbuild: true
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harness: console
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harness_config:
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type: multi_line
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ordered: false
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regex:
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- "Ping \\(on channel 21\\)"
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- "Pong \\(on channel 20\\)"
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nrf.extended.sample.drivers.mbox.nrf54l_no_multithreading:
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platform_allow:
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- nrf54l09pdk/nrf54l09/cpuapp
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- nrf54l20pdk/nrf54l20/cpuapp
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integration_platforms:
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- nrf54l20pdk/nrf54l20/cpuapp
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extra_args:
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- mbox_SNIPPET=nordic-flpr
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- mbox_CONFIG_MULTITHREADING=n
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- remote_CONFIG_MULTITHREADING=n
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sysbuild: true
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harness: console
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harness_config:
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type: multi_line
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ordered: false
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regex:
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- "Ping \\(on channel 21\\)"
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- "Pong \\(on channel 20\\)"
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nrf.extended.sample.drivers.mbox.nrf54l_remote_no_multithreading:
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platform_allow:
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- nrf54l09pdk/nrf54l09/cpuapp
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- nrf54l20pdk/nrf54l20/cpuapp
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integration_platforms:
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- nrf54l20pdk/nrf54l20/cpuapp
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extra_args:
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- mbox_SNIPPET=nordic-flpr
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- remote_CONFIG_MULTITHREADING=n
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sysbuild: true
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harness: console
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harness_config:
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type: multi_line
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ordered: false
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regex:
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- "Ping \\(on channel 21\\)"
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- "Pong \\(on channel 20\\)"

‎samples/zephyr/drivers/mbox/sysbuild.cmake

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#
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# Copyright (c) 2025 Nordic Semiconductor ASA
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#
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# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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#
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if("${SB_CONFIG_REMOTE_BOARD}" STREQUAL "")
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message(FATAL_ERROR
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"Target ${BOARD}${BOARD_QUALIFIERS} not supported for this sample. "
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"There is no remote board selected in Kconfig.sysbuild")
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endif()
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set(REMOTE_APP remote)
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ExternalZephyrProject_Add(
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APPLICATION ${REMOTE_APP}
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SOURCE_DIR ${APP_DIR}/${REMOTE_APP}
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BOARD ${SB_CONFIG_REMOTE_BOARD}
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)

‎samples/zephyr/drivers/mbox/sysbuild.conf

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SB_CONFIG_PARTITION_MANAGER=n

‎scripts/ci/tags.yaml

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- nrf/samples/zephyr/drivers/i2c/
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- zephyr/samples/drivers/i2c/
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ci_samples_zephyr_drivers_mbox:
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files:
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- nrf/samples/zephyr/drivers/mbox/
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- zephyr/samples/drivers/mbox/
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ci_samples_zephyr_boards_nordic_system_off:
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files:
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- nrf/samples/zephyr/boards/nordic/system_off/

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