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:

[j.papa]

Has anyone from the Nordic team or Amazon Sidewalk team found a solution to this issue that doesn't involve compiling with an older version of nanopb and using external headers?

[j.papa]

I already made it work, I just follow this instruction provided by Elfving .

As follows:
1. Download version 0.3.9.3 at Nanopb's website: nanopb-0.3.9.3-windows-x86.zip, nanopb-0.3.9.3-linux-x86.tar.gz

2. Folder /generator-bin consists of the binaries/exe that will generate the necessary .pb.c and .pb.h files, this can be done using the command protoc --nanopb_out=. simple.proto`

See example \nanopb-0.3.9.3-windows-x86\examples\simple for reference.

3. Adding the headers only does not work for me, so I also include their sources, in one folder I have the following:

• pb_common.h and .c files
• pb_decode.h and .c files
• pb_encode.h and .c files

4. Just make sure to add target_sources() and target_include_directories() that points to the files generated at 2, and common files at 3.

That's it, Sidewalk is now happy.