Hello,
We are in the final stages of development with a board that combines the nRF5340 with the nRF7002. This board also requires native USB support and we are routing the Zephyr console to the USB CDC_ACM interface. USB has been working fine until we brought WiFi into the mix. Now there's a fault during boot due to a stack overflow. After quite some research we are still unable to increase the stack size of the task where the problem occurs. Please see the UART console output below:
*** Booting nRF Connect SDK v2.9.1-60d0d6c8d42d ***
*** Using Zephyr OS v3.7.99-ca954a6216c9 ***
[00:00:00.207,336] <inf> net_config: Initializing network
[00:00:00.215,332] <inf> net_config: Waiting interface 1 (0x20001d90) to be up...
[00:00:00.225,616] <inf> net_config: IPv4 address: 192.168.1.99
[00:00:00.234,191] <inf> net_config: Running dhcpv4 client...
[00:00:00.243,347] <inf> udc_nrf: Initialized
[00:00:00.250,305] <inf> usbd_init: interface 0 alternate 0
[00:00:00.258,483] <inf> usbd_init: ep 0x81 mps 0x0010 interface ep-bm 0x00020000
[00:00:00.268,646] <inf> usbd_init: interface 1 alternate 0
[00:00:00.276,855] <inf> usbd_init: ep 0x82 mps 0x0040 interface ep-bm 0x00040000
[00:00:00.287,048] <inf> usbd_init: ep 0x01 mps 0x0040 interface ep-bm 0x00040002
[00:00:00.297,180] <inf> usbd_init: Instance iface-bm 0x00000003 ep-bm 0x00060002
[00:00:00.307,281] <inf> usbd_init: Init class node 0x20000454, descriptor length 66
[00:00:00.317,626] <inf> usbd_init: bNumInterfaces 2 wTotalLength 75
[00:00:00.326,568] <inf> usbd_init: FS bNumConfigurations 1
[00:00:00.334,869] <inf> usbd_cdc_acm: rx_en: trigger rx_fifo_work
[00:00:00.343,780] <err> os: ***** USAGE FAULT *****
[00:00:00.351,776] <err> os: Stack overflow (context area not valid)
[00:00:00.361,175] <err> os: r0/a1: 0x2002b864 r1/a2: 0x2002b8cc r2/a3: 0x00000002
[00:00:00.372,039] <err> os: r3/a4: 0xffffffff r12/ip: 0x00000000 r14/lr: 0x00000064
[00:00:00.382,873] <err> os: xpsr: 0x0005ce00
[00:00:00.390,319] <err> os: s[ 0]: 0x00000003 s[ 1]: 0x00001683 s[ 2]: 0x2002b87d s[ 3]: 0xaaaaaaaa
[00:00:00.402,923] <err> os: s[ 4]: 0xaaaaaaaa s[ 5]: 0x00075d40 s[ 6]: 0x00000000 s[ 7]: 0x0007e3d2
[00:00:00.415,527] <err> os: s[ 8]: 0x00000080 s[ 9]: 0xaaaaaaaa s[10]: 0xaaaaaaaa s[11]: 0xaaaaaaaa
[00:00:00.428,131] <err> os: s[12]: 0xaaaaaaaa s[13]: 0xaaaaaaaa s[14]: 0xaaaaaaaa s[15]: 0xaaaaaaaa
[00:00:00.440,704] <err> os: fpscr: 0x0007e3d1
[00:00:00.448,120] <err> os: Faulting instruction address (r15/pc): 0x00000000
[00:00:00.458,221] <err> os: >>> ZEPHYR FATAL ERROR 2: Stack overflow on CPU 0
[00:00:00.468,292] <err> os: Current thread: 0x20003770 (udc_nrfx)
[00:00:00.477,325] <err> os: Halting system
uart:~$
Is this something that can be fixed by config settings? Or requires a patch directly in the NCS source code?
Best regards,
Daniel Campora