Nordic nRF52840DK - Unexpected RCP reset while running ot-daemon

[marcorussi]

Hello all,
I have been trying to run a RCP on my nRF52840DK board for days with no success. I have also tried many commits from this repo and the sample provided by Nordic in their nRF Connect SDK with "partial" success.
Although I am going to raise an issue regarding the latest commit of this repo (ot-nrf52840) which represents the main issue I am facing at the moment.
I am on main branch commit id 83f2517 with openthread git submodule commit id 7dfde1f.
I have built openthread library (the git submodule) and the nRF52840 images as below:
openthread:
./script/cmake-build posix -DOT_THREAD_VERSION=1.2 -DOT_DAEMON=ON
nRF52840
./script/build nrf52840 UART_trans
and

cd build/bin
arm-none-eabi-objcopy -O ihex ot-cli-ftd ot-rcp.hex

I have flashed my nRF52840DK (PCA10056 / V0.9.0 / 2017.10):
nrfjprog -f nrf52 --chiperase --verify --program ot-rcp.hex --reset
and then disable MSD and UART HW flow control check on my board with the MSDDisable and SetHWFC Force JLink commands.

Finally I launched the OT daemon:
./openthread/build/posix/src/posix/ot-daemon 'spinel+hdlc+uart:///dev/ttyACM0?uart-baudrate=115200?uart-flow-control' --verbose

Here the result:

./openthread/build/posix/src/posix/ot-daemon[22300]: Running OPENTHREAD/thread-reference-20200818-1609-g7dfde1f12; POSIX; Apr  6 2022 10:40:02
./openthread/build/posix/src/posix/ot-daemon[22300]: Thread version: 3
./openthread/build/posix/src/posix/ot-daemon[22300]: Thread interface: wpan0
./openthread/build/posix/src/posix/ot-daemon[22300]: RCP version: OPENTHREAD/thread-reference-20200818-1609-g7dfde1f12; NRF52840; Apr  6 2022 10:48:41
./openthread/build/posix/src/posix/ot-daemon[22300]: 00:00:39.863 [C] Platform------: Unexpected RCP reset: RESET_POWER_ON
./openthread/build/posix/src/posix/ot-daemon[22300]: 00:00:41.898 [C] Platform------: BSD TCP function() at radio_spinel_impl.hpp:2340: Failure

Thank you.

[marcorussi]

I found a fix about removing a zombie wpan0 but it seems that I don't have it:

marco@marco-Latitude-5590:~/Pingeco/exp/ot-nrf528xx$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
    link/ether 8c:ec:4b:e5:90:08 brd ff:ff:ff:ff:ff:ff
3: wlp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DORMANT group default qlen 1000
    link/ether a0:88:69:f5:22:9c brd ff:ff:ff:ff:ff:ff
4: nat64: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 500
    link/none 
5: otbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default 
    link/ether 02:42:12:ee:8d:eb brd ff:ff:ff:ff:ff:ff
6: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default 
    link/ether 02:42:6a:2d:01:20 brd ff:ff:ff:ff:ff:ff

[jwhui]

@marcorussi , thanks for raising this issue. I believe you are experiencing the same issue as in openthread/openthread#7552, which should be addressed by openthread/openthread#7570.

[marcorussi]

Hi @jwhui, that is what I thought as I commented on that issue before opening this one. The only thing that confuses me is the "Unexpected RCP reset: RESET_POWER_ON" message. Do you think it has to do with the same TCP error? If yes, should I try commit samkumar/openthread@a1721ea ?

[canisLupus1313]

@marcorussi Looks like You have problem when starting the RCP. Would it be possible for You to provide dmesg log? Also can You check lsusb for nRF dk presence? Also please retest without uart-flow-control.

And one more thing please meake sure that when You preform git operations on repo You always remove the build folder.

[marcorussi]

@canisLupus1313 please find the dmesg log. I took the only part I think you'd need:

[  658.390253] usb 1-3: USB disconnect, device number 8
[  664.366472] usb 1-9: new high-speed USB device number 11 using xhci_hcd
[  664.515121] usb 1-9: New USB device found, idVendor=1366, idProduct=0105, bcdDevice= 1.00
[  664.515126] usb 1-9: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  664.515128] usb 1-9: Product: J-Link
[  664.515130] usb 1-9: Manufacturer: SEGGER
[  664.515132] usb 1-9: SerialNumber: 000683274154
[  664.517095] cdc_acm 1-9:1.0: ttyACM0: USB ACM device
[  873.142137] usb 1-9: USB disconnect, device number 11
[  876.319043] usb 1-9: new high-speed USB device number 12 using xhci_hcd
[  876.468307] usb 1-9: New USB device found, idVendor=1366, idProduct=0105, bcdDevice= 1.00
[  876.468325] usb 1-9: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  876.468331] usb 1-9: Product: J-Link
[  876.468336] usb 1-9: Manufacturer: SEGGER
[  876.468341] usb 1-9: SerialNumber: 000683274154
[  876.471153] cdc_acm 1-9:1.0: ttyACM0: USB ACM device

And yes, the device is present as you can see. Find also here lsusb:

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 012: ID 1366:0105 SEGGER J-Link
Bus 001 Device 003: ID 8087:0a2b Intel Corp. 
Bus 001 Device 002: ID 0bda:5650 Realtek Semiconductor Corp. Integrated Webcam_HD
Bus 001 Device 010: ID 05ac:12a8 Apple, Inc. iPhone5/5C/5S/6
Bus 001 Device 004: ID 0a5c:5832 Broadcom Corp. 5880
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Thank you.

[marcorussi]

I have updated openthread submodule to a9b4e637f
and rebuilt ot-rcp nrf52840 image and ot-daemon/ot-ctl.
It fails with a different error now:

marco@marco-Latitude-5590:~/Pingeco/exp/ot-nrf528xx$ sudo ./openthread/build/posix/src/posix/ot-daemon 'spinel+hdlc+uart:///dev/ttyACM0?uart-baudrate=115200' --verbose
./openthread/build/posix/src/posix/ot-daemon[21864]: Running OPENTHREAD/thread-reference-20200818-1621-ga9b4e637f; POSIX; Apr  7 2022 22:11:14
./openthread/build/posix/src/posix/ot-daemon[21864]: Thread version: 3
./openthread/build/posix/src/posix/ot-daemon[21864]: 49d.17:40:41.436 [C] Platform------: Too many rcp failures, exiting
./openthread/build/posix/src/posix/ot-daemon[21864]: 49d.17:40:41.436 [C] Platform------: RecoverFromRcpFailure() at radio_spinel_impl.hpp:2259: Failure

No mention of TCP errors now but still "too many RCP failures".
NOTE: ot-nrf528xx is stil at 83f2517

[canisLupus1313]

@marcorussi I asked around internally about the revision of board that You are using. unfortunatelly those aren't available any whare in our offices since 0.9.0 was a preview revision. With my 2.0.1 this issue do not reproduce. Is there any chance that You can try this on newer version?

[marcorussi]

@canisLupus1313 sorry for the late reply but I had few days off and meanwhile I got a new nRF52840 USB dongle. With this dingle I can run RCP reliably enough to say that the my problem had to do with the nRF52840 dev kit and probably with that specific revision. I came across another issues with the dongle though so I'll eventually raise another ticket about it. Would you like me to close this open ticket? I don't need to fix this particular issues anymore but I can investigate further in future if you like. Thanks.

[canisLupus1313]

@marcorussi thanks for confirmation that this is HW issue. I think we can close this issue then.