Arduino Nano 33 BLE sense constantly resetting.

[bkalthoff]

Describe the bug
After building and flashing the hello_world sample the board constantly resets over and over.
I've tried using different the master branch of zephyr and the v2.5 branch but to no avail.
I also tried different version of bossac, one that I built from source and one that came with the arduino IDE.
Flashing with the arduino IDE does not cause constant resetting. I have yet to try on building and flashing on another machine.

I am getting a warning when building. See warning further down.

To Reproduce
Steps to reproduce the behavior:

1. west build -p -b arduino_nano_33_ble samples/hello_world
2. west flash --bossac="/path/to/bossac"
3. sudo dmesg
4. Check if USB constantly disconnecting and reconnecting.

dmesg output

[ 9152.530787] usb 1-10: new full-speed USB device number 113 using xhci_hcd
[ 9152.689489] usb 1-10: New USB device found, idVendor=2341, idProduct=005a, bcdDevice= 0.11
[ 9152.689490] usb 1-10: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 9152.689491] usb 1-10: Product: Arduino Nano 33 BLE
[ 9152.689492] usb 1-10: Manufacturer: Arduino
[ 9152.689492] usb 1-10: SerialNumber: 0000000000000000A5048AA7799337A8
[ 9152.690955] cdc_acm 1-10:1.0: ttyACM0: USB ACM device
[ 9152.725168] usb 1-10: USB disconnect, device number 113
[ 9153.054786] usb 1-10: new full-speed USB device number 114 using xhci_hcd
[ 9153.213407] usb 1-10: New USB device found, idVendor=2341, idProduct=005a, bcdDevice= 0.11
[ 9153.213408] usb 1-10: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 9153.213409] usb 1-10: Product: Arduino Nano 33 BLE
[ 9153.213410] usb 1-10: Manufacturer: Arduino
[ 9153.213410] usb 1-10: SerialNumber: 0000000000000000A5048AA7799337A8
[ 9153.214946] cdc_acm 1-10:1.0: ttyACM0: USB ACM device
[ 9153.243920] usb 1-10: USB disconnect, device number 114
[ 9153.566790] usb 1-10: new full-speed USB device number 115 using xhci_hcd
[ 9153.725412] usb 1-10: New USB device found, idVendor=2341, idProduct=005a, bcdDevice= 0.11
[ 9153.725413] usb 1-10: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 9153.725414] usb 1-10: Product: Arduino Nano 33 BLE
[ 9153.725414] usb 1-10: Manufacturer: Arduino
[ 9153.725415] usb 1-10: SerialNumber: 0000000000000000A5048AA7799337A8
[ 9153.727355] cdc_acm 1-10:1.0: ttyACM0: USB ACM device
[ 9153.762748] usb 1-10: USB disconnect, device number 115

cmake warning

CMake Warning at ../../subsys/usb/CMakeLists.txt:22 (message):
  CONFIG_USB_DEVICE_VID has default value 0x2FE3.

  This value is only for testing and MUST be configured for USB products.


CMake Warning at ../../subsys/usb/CMakeLists.txt:28 (message):
  CONFIG_USB_DEVICE_PID has default value 0x100.

  This value is only for testing and MUST be configured for USB products.

Environment (please complete the following information):

• OS: Linux
• Toolchain (Zephyr SDK)
• Board https://store.arduino.cc/arduino-nano-33-ble-sense
• V2.5 branch and Master branch

[bkalthoff]

Found success when using UART and finally got some output. Guessing that the cdc_acm driver isn't working correctly.

[galak]

Found success when using UART and finally got some output. Guessing that the cdc_acm driver isn't working correctly.

When you say using UART, what do you mean?

@saltyJeff can you look at this bug?

[bkalthoff]

Found success when using UART and finally got some output. Guessing that the cdc_acm driver isn't working correctly.

When you say using UART, what do you mean?

@saltyJeff can you look at this bug?

I managed to get serial output through the tx/rx pins, but not the usb. I tried on two different machines, same issue.

[carlescufi]

@jfischer-no could you try to shed some light here?

[jfischer-no]

I do not think this is related to USB device support as it works fine on different nRF52840 based boards.
I also do think it is not a bug but configuration issue. Please check samples/subsys/shell/shell_module build with overlay-usb.conf and samples/subsys/usb/console.

[jfischer-no]

Is it related to #33523?

[Stefan-Schmidt]

For me it was very much related. I have seen the same resetting behavior and the root was indeed the double offset problem described in #33523

Working around this double offset did lead to successful flashing and no more USB resetting.

[carlescufi]

Closing as duplicate of #33523

[WilliamGFish]

I'm not sure they are related as I am able to flash the nano 33 ble in a windows environment following the instructions defined in the zephyr documentation, with the addition of --bossac-port="COM7" to the west flash command.

I have used blinky and previously had BLE running but I have never been able to get the USB console to work. I to believe this may be more to do with the CDC drivers in windows as well as some using the incorrect version of BOSSAC.