samples/dfu/single_slot: Application entering fw_loader via USB MCUmgr by nvlsianpu · Pull Request #27416 · nrfconnect/sdk-nrf

nvlsianpu · 2026-03-06T16:19:38Z

goes after #27185

Review only commit after this commits (by title): changelog: entry on usb_mcumgr firmware_loader

application can reboot the device into firmware_loader mode using USB CDC ACM Virtual port by MCUmgr grp os reboot command with boot-mode==1.

NordicBuilder · 2026-03-06T16:22:05Z

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Build number: 33

Inputs:

Sources:

sdk-nrf: PR head: a2fe4c2be7e07e1509f6a45b7b1dbc9d1ed07b53

more details

sdk-nrf:

PR head: a2fe4c2be7e07e1509f6a45b7b1dbc9d1ed07b53
merge base: 956d2fedb1f51175d21bc0d7bc4025ce1005c343
target head (main): 3cfab8ed9cf9dd5f1d70c34590e8ac77e9704658
Diff

Github labels

Enabled	Name	Description
	ci-disabled	Disable the ci execution
	ci-all-test	Run all of ci, no test spec filtering will be done
	ci-force-downstream	Force execution of downstream even if twister fails
	ci-run-twister	Force run twister
	ci-run-zephyr-twister	Force run zephyr twister

List of changed files detected by CI (21)

samples
│  ├── dfu
│  │  ├── fw_loader
│  │  │  ├── usb_mcumgr
│  │  │  │  ├── boards
│  │  │  │  │  ├── nrf54lm20dk_nrf54lm20b_cpuapp.overlay
│  │  │  │  │  │ nrf54lm20dongle_nrf54lm20b_cpuapp.overlay
│  │  │  │  │ sample.yaml
│  │  ├── single_slot
│  │  │  ├── README.rst
│  │  │  ├── boards
│  │  │  │  ├── nrf54lm20dk_nrf54lm20a_cpuapp_usb_enter.overlay
│  │  │  │  ├── nrf54lm20dk_nrf54lm20b_cpuapp_usb_enter.overlay
│  │  │  │  │ nrf54lm20dongle_nrf54lm20b_cpuapp_usb_enter_dongle.overlay
│  │  │  ├── nrf54lm20dongle_dfu_partitions.dtsi
│  │  │  ├── prj_usb_enter.conf
│  │  │  ├── prj_usb_enter_dongle.conf
│  │  │  ├── sample.yaml
│  │  │  ├── src
│  │  │  │  │ main.c
│  │  │  ├── sysbuild
│  │  │  │  ├── mcuboot
│  │  │  │  │  ├── boards
│  │  │  │  │  │  ├── nrf54lm20dk_nrf54lm20a_cpuapp_usb_enter.overlay
│  │  │  │  │  │  ├── nrf54lm20dk_nrf54lm20b_cpuapp_usb_enter.overlay
│  │  │  │  │  │  ├── nrf54lm20dongle_nrf54lm20b_cpuapp.conf
│  │  │  │  │  │  │ nrf54lm20dongle_nrf54lm20b_cpuapp.overlay
│  │  │  │  ├── usb_mcumgr_usb_enter.conf
│  │  │  │  ├── usb_mcumgr_usb_enter_dongle.conf
│  │  │  │  │ usb_mcumgr_usb_enter_dongle.overlay
│  │  │  ├── sysbuild_usb_enter.conf
│  │  │  │ sysbuild_usb_enter_dongle.conf

Outputs:

Toolchain

Version: 911f4c5c26
Build docker image: docker-dtr.nordicsemi.no/sw-production/ncs-build:911f4c5c26_5ea73affbf

Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

◻️ Toolchain - Skipped: existing toolchain is used
✅ Build twister - Skipped: Skipping Build & Test as it succeeded in a previous run: 31
✅ Integration tests
- ✅ test-sdk-mcuboot
- ✅ test-sdk-dfu - Skipped: Job was skipped as it succeeded in a previous run

Disabled integration tests

- test-fw-nrfconnect-nrf_lrcs_mosh
- test-fw-nrfconnect-nrf_lrcs_positioning
- desktop52_verification
- test_ble_nrf_config
- test-fw-nrfconnect-apps
- test-fw-nrfconnect-ble_mesh
- test-fw-nrfconnect-ble_samples
- test-fw-nrfconnect-chip
- test-fw-nrfconnect-fem
- test-fw-nrfconnect-nfc
- test-fw-nrfconnect-nrf-iot_libmodem-nrf
- test-fw-nrfconnect-nrf-iot_lwm2m
- test-fw-nrfconnect-nrf-iot_samples
- test-fw-nrfconnect-nrf-iot_thingy91
- test-fw-nrfconnect-nrf-iot_zephyr_lwm2m
- test-fw-nrfconnect-nrf_crypto
- test-fw-nrfconnect-ps-main
- test-fw-nrfconnect-rpc
- test-fw-nrfconnect-rs
- test-fw-nrfconnect-tfm
- test-fw-nrfconnect-thread-main
- test-low-level
- test-sdk-audio
- test-sdk-find-my
- test-sdk-wifi
- test-secdom-samples-public

Note: This message is automatically posted and updated by the CI

github-actions · 2026-03-06T16:50:05Z

You can find the documentation preview for this PR here.

Preview links for modified nRF Connect SDK documents:

https://ncsbmdoc.z6.web.core.windows.net/ncs/PR-27416/nrf/samples/dfu/single_slot/README.html

FrancescoSer

Approving not to block but please implement these suggestions

ahasztag · 2026-03-30T12:10:29Z

+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+/*#include "../../../boards/nrf54lm20dk_nrf54lm20a_cpuapp.overlay"*/


Looks like a leftover comment - however, theoretically this is the correct way of passing memory map partitioning to sub images according to the build system owners.

1) Added configuration which allows enabling MCUboot's boot_mode sensing trought gpregret register for nRF54lm20dk. This configuration is supposed to be used along with FILE_SUFFIX=usb_enter. 2) Added support for enetering the firmware loader mode using SMP MCUmgr protocol. This can be done using OS reboot command with boot_mode parameter set to `1`. Functionality is added for nRF54LM20 DK board. Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no> dk

Application is blinking the LED when it is running. Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

Setup VID & PID for the nRF54lm20 dongle. Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

Extend sample's configuration to support nRF54LM20dongle with usb fw_loader and buttonles DFU enter via mcumgr (via USB serial) in the application. This peculiar configuration for the nrf54lm20dongle/nrf54lm20b/cpuapp It has to be build with the FILE_SUFFIX="usb_enter_dongle". Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

Added peculiar configuration for the nrf54lm20dongle/nrf54lm20b/cpuapp It has only to build sucessfully as this sample is supposed to be use as part of a DFU multiimage sysbuild project. Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

Added nrf54lm20dk/nrf54lm20b/cpuapp as test-build platform. Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

Added doc on USB buttonelss DFU for nRF54lm20dk and nRF54lm20dongle. Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

NordicBuilder added the doc-required PR must not be merged without tech writer approval. label Mar 6, 2026

nvlsianpu changed the title ~~Usb fw loader usb enter~~ samples/dfu/single_slot: Application entering fw_loader via USB MCUmgr Mar 6, 2026

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch from 92de9b1 to b44fc63 Compare March 10, 2026 13:42

NordicBuilder added the changelog label Mar 10, 2026

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch from b44fc63 to ce9e2cc Compare March 19, 2026 14:34

nvlsianpu mentioned this pull request Mar 20, 2026

USB CDC ACM serial firmware loader + dfu/single_slot sample project integration #27185

Merged

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch 5 times, most recently from cc8030a to 6b1f238 Compare March 26, 2026 14:56

nvlsianpu added this to the 3.3.0 milestone Mar 27, 2026

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch from 6b1f238 to bb0ad8d Compare March 27, 2026 11:44

NordicBuilder removed doc-required PR must not be merged without tech writer approval. changelog labels Mar 27, 2026

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch 2 times, most recently from 1456564 to 0880ad2 Compare March 27, 2026 13:09

nvlsianpu marked this pull request as ready for review March 27, 2026 13:09

nvlsianpu requested review from a team as code owners March 27, 2026 13:09

NordicBuilder added the doc-required PR must not be merged without tech writer approval. label Mar 27, 2026

nvlsianpu added the no-changelog label Mar 27, 2026

FrancescoSer approved these changes Mar 27, 2026

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Comment thread samples/dfu/single_slot/README.rst Outdated

Comment thread samples/dfu/single_slot/README.rst Outdated

Comment thread samples/dfu/single_slot/README.rst Outdated

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch 2 times, most recently from 283d316 to e0ed7ae Compare March 27, 2026 14:03

nvlsianpu requested a review from ahasztag March 27, 2026 14:34

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch 2 times, most recently from 9b83341 to d25dc97 Compare March 30, 2026 11:14

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch from d25dc97 to 22bb5ca Compare March 30, 2026 11:15

michalek-no approved these changes Mar 30, 2026

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ahasztag reviewed Mar 30, 2026

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nvlsianpu force-pushed the usb_fw_loader_usb_enter branch 4 times, most recently from 8715be0 to 531f475 Compare March 31, 2026 09:15

ahasztag self-requested a review March 31, 2026 09:29

ahasztag approved these changes Mar 31, 2026

View reviewed changes

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch from 531f475 to b53ccbb Compare March 31, 2026 10:19

nvlsianpu requested a review from a team as a code owner March 31, 2026 10:19

NordicBuilder requested review from a team and kl-cruz March 31, 2026 10:19

miha-nordic approved these changes Mar 31, 2026

View reviewed changes

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch from b53ccbb to 0f94ab3 Compare March 31, 2026 13:49

ahasztag mentioned this pull request Mar 31, 2026

samples: dfu: Add support for nRFLM20b for usb_mcumgr #27830

Closed

ahasztag reviewed Mar 31, 2026

View reviewed changes

Comment thread samples/dfu/single_slot/sample.yaml Outdated

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch 2 times, most recently from af82601 to 8a63a62 Compare April 1, 2026 07:41

nvlsianpu removed request for a team April 1, 2026 07:42

nvlsianpu added 7 commits April 1, 2026 16:31

samples/dfu/single_slot: add heartbeet LED to app

2c38f98

Application is blinking the LED when it is running. Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

sampes/dfu/single_slot: USB VID&PID for fw_loader

7e7cefe

Setup VID & PID for the nRF54lm20 dongle. Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

samples/dfu/fw_loader/usb_mcumgr: add nrf54lm20b

43abacd

Added nrf54lm20dk/nrf54lm20b/cpuapp as test-build platform. Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

sample/dfu/single_slot: doc on USB buttonless DFU

a2fe4c2

Added doc on USB buttonelss DFU for nRF54lm20dk and nRF54lm20dongle. Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

nvlsianpu force-pushed the usb_fw_loader_usb_enter branch from 8a63a62 to a2fe4c2 Compare April 1, 2026 14:32

PerMac merged commit fd02542 into nrfconnect:main Apr 2, 2026
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samples/dfu/single_slot: Application entering fw_loader via USB MCUmgr#27416

samples/dfu/single_slot: Application entering fw_loader via USB MCUmgr#27416
PerMac merged 7 commits into
nrfconnect:mainfrom
nvlsianpu:usb_fw_loader_usb_enter

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Inputs:

Sources:

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Outputs:

Toolchain

Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

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