Unable to use NanoPB with Sidewalk

[vawkes]

Hello, I am trying to use the subghz template in ncs 2.5.2 but I am running into an issue when enabling NanoPB. When enabling NanoPB with CONFIG_NANOPB=y the application faults when connecting to BLE to register on the network. If I am already registered on the network the application runs fine but it seems there is something in the BLE registration that is causing a fault with NanoPB.

00> [00:00:02.054,931] <inf> sid_ble_conn: BT Connected
00> [00:00:03.348,114] <err> os: ***** BUS FAULT *****
00> [00:00:03.348,114] <err> os:   Precise data bus error
00> [00:00:03.348,144] <err> os:   BFAR Address: 0x110001
00> [00:00:03.348,175] <err> os: r0/a1:  0x20010150  r1/a2:  0x00110001  r2/a3:  0x00000000
00> [00:00:03.348,175] <err> os: r3/a4:  0x00000000 r12/ip:  0x00000003 r14/lr:  0x0003b44b
00> [00:00:03.348,205] <err> os:  xpsr:  0x41000200
00> [00:00:03.348,236] <err> os: s[ 0]:  0x200087d0  s[ 1]:  0x20016bc6  s[ 2]:  0x00000000  s[ 3]:  0x0002fefb
00> [00:00:03.348,236] <err> os: s[ 4]:  0x2001acf4  s[ 5]:  0x0003cacd  s[ 6]:  0x2001ad60  s[ 7]:  0x2001ad60
00> [00:00:03.348,266] <err> os: s[ 8]:  0x20016ec0  s[ 9]:  0x2001acf4  s[10]:  0x2001ad60  s[11]:  0x20010168
00> [00:00:03.348,266] <err> os: s[12]:  0x00000014  s[13]:  0x20016bc6  s[14]:  0x00000000  s[15]:  0x00067ef7
00> [00:00:03.348,327] <err> os: fpscr:  0x00000000
00> [00:00:03.348,327] <err> os: r4/v1:  0x200101c8  r5/v2:  0x2000a838  r6/v3:  0x0008129e[0m
00> [00:00:03.348,358] <err> os: r7/v4:  0x20016af4  r8/v5:  0x00000004  r9/v6:  0x00000000
00> [00:00:03.348,358] <err> os: r10/v7: 0x00000000  r11/v8: 0x00000000    psp:  0x200100b0
00> [00:00:03.348,388] <err> os: EXC_RETURN: 0xffffffed
00> [00:00:03.348,388] <err> os: Faulting instruction address (r15/pc): 0x00069d7a
00> [00:00:03.348,419] <err> os: >>> ZEPHYR FATAL ERROR 25: Unknown error on CPU 0
00> [00:00:03.348,480] <err> os: Current thread: 0x200033a0 (unknown)
00> [00:00:04.049,621] <err> os: Halting system

Call Stack:

[Elfving]

Hello Timothy,

Sorry about the wait. The Easter period is a public holiday in Norway.

I don't think the combination of NanoPB and Sidewalk has been tested. Have you tried debugging to find where the bus fault was raised?

Regards,

Elfving

[vawkes]

No worries. At the moment the call stack and fault info above are all I have. It is pretty easier to reproduce by just adding CONFIG_NANOPB=y if you need more info immediately. I will see if I can get some more debug information later.

[Elfving]

Hi Sam,

I am not sure what happened to this case, but I haven't looked into this for about a year. Though I tried building the sidewalk end device sample for NCS 3 just now, with CONFIG_NANOPB enabled, for the nRF5340dk, and that seems to build ok. Are you seeing this issue on newer SDKs as well? What NCS version are you using?

Regards,

Elfving

[samtday]

I am working with NCS 2.9.0. I am using the sensor_monitoring variant of the sidewalk_end_device example and have enabled an adc channel as well.

[Elfving]

Just to have the same baseline here, are you seeing it working with the default sample in 2.9?

Regards,

Elfving

[samtday]

This is the print out from my application - I am about to try migrating to a new version of NCS. Which version should I go to - 3.0.0 or 3.0.1?

*** Booting Sidewalk v2.9.0-700b67f39073 ***
*** Using nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 *----------------------------------------------------------------
Sidewalk SDK        = 1.17.1.18
APP_BUILD_VERSION   = 700b67f39073
APP_NAME            = sidewalk
build time          = May  6 2025 09:27:49
board               = nrf5340dk/nrf5340/cpuapp
----------------------------------------------------------------
[00:00:00.002,532] <inf> adc: Start ADC Init
[00:00:00.002,624] <inf> adc: ADC Initialized Successfully
[00:00:00.003,509] <inf> adc: Temp: 0 *C (0 *F)
[00:00:00.003,540] <inf> adc: Send Temp Sidewalk message
[00:00:00.004,211] <inf> sidewalk_events: sidewalk need to be started first.
[00:00:00.020,996] <err> os: ***** USAGE FAULT *****
[00:00:00.021,057] <err> os:   Stack overflow (context area not valid)
[00:00:00.021,148] <err> os: r0/a1:  0xfffffffe  r1/a2:  0xffffffff  r2/a3:  0x00050000
[00:00:00.021,209] <err> os: r3/a4:  0x00000000 r12/ip:  0xffffffff r14/lr:  0x000965fb
[00:00:00.021,270] <err> os:  xpsr:  0xa1000000
[00:00:00.021,362] <err> os: s[ 0]:  0xfffafffe  s[ 1]:  0xffffffff  s[ 2]:  0x20012378  s[ 3]:  0x00000000
[00:00:00.021,484] <err> os: s[ 4]:  0x00000000  s[ 5]:  0x000965fb  s[ 6]:  0x00050000  s[ 7]:  0x00000000
[00:00:00.021,575] <err> os: s[ 8]:  0xffffffff  s[ 9]:  0x200123f0  s[10]:  0xffffffff  s[11]:  0x20004134
[00:00:00.021,697] <err> os: s[12]:  0x00050000  s[13]:  0x00000000  s[14]:  0x0007aa31  s[15]:  0x00000000
[00:00:00.021,728] <err> os: fpscr:  0x200123c8
[00:00:00.021,820] <err> os: r4/v1:  0xfffafffe  r5/v2:  0xffffffff  r6/v3:  0x00000000
[00:00:00.021,881] <err> os: r7/v4:  0x20012378  r8/v5:  0x00000000  r9/v6:  0x00000000
[00:00:00.021,972] <err> os: r10/v7: 0x00000000  r11/v8: 0x00000000    psp:  0x20012340
[00:00:00.022,003] <err> os: EXC_RETURN: 0xfffffffd
[00:00:00.022,064] <err> os: Faulting instruction address (r15/pc): 0x00050030
[00:00:00.022,155] <err> os: >>> ZEPHYR FATAL ERROR 2: Stack overflow on CPU 0
[00:00:00.022,186] <err> os: Current thread: 0x200042b8 (unknown)
[00:00:00.215,148] <err> os: Halting system

[Elfving]

samtday said:

Which version should I go to - 3.0.0 or 3.0.1?

3.0.1. The last digit is just for bug-fixes, no API changes. 

It is strange that you have issues with any version, though let's start focusing on v3, and see what the logs look like there.

Regards,

Elfving

[samtday]

Are there changes I should be aware of transitioning from 2.9.0 or am I good to just adjust the build configuration and run with it?

[samtday]

It seems the transition to v3.0.1 would require me to begin from an entirely different project (after downloading the 'Amazon Sidewalk Add-on') to be able to include the sidewalk SDK. Is this what you expect given I am currently working on v2.9.0. Is there a way to point my current project to the appropriate version instead of having to start from scratch in the new SDK?

[samtday]

I was able to migrate to the newest versions of the SDK and build a fresh example of sid_end_device with the only change being the addition of 'CONFIG_NANOPB=y' to prj.conf and it is still not running appropriately.