Hi,
I'm implementing a FOTA update procedure for the nRF9160 using the download_client from the nRF Connect SDK 1.9.1 and modem firmware 1.3.1.
In general the image update works without any issues but in about one out of five attempts the nRF9160 reboots during the process. In this case I do not see the usual crash dump written to the console. It looks like this:
[00:01:40.844,146] <inf> download_client: Downloaded 38912/280664 bytes (13%) [00:01:41.934,875] <inf> download_client: Downloaded 40960/280664 bytes (14%) [00:01:42.923,980] <inf> download_client: Downloaded 43008/280664 bytes (15%) [00:01:44.123,016] <inf> download_client: Downloaded 45056/280664 bytes (16%) [00:01:45.847,869] <inf> download_client: Downloaded 47104/280664 bytes (16%) *** Booting Zephyr OS build v2.7.99-ncs1-1 *** Flash regions Domain Permissions 00 02 0x00000 0x18000 Secure rwxl 03 31 0x18000 0x100000 Non-Secure rwxl Non-secure callable region 0 placed in flash region 2 with size 32. SRAM region Domain Permissions 00 03 0x00000 0x08000 Secure rwxl 04 31 0x08000 0x40000 Non-Secure rwxl
I see this behaviour on nRF9160 Revision 1 and 2.
I had an Ozone debugger connected with all Vector Catches enabled in the Break&Tracepoints view during the reboot and Ozone did not catch it.
It looks like somehow the fault handler is not called. I also do not see any calls to sys_reboot() in the call path.
Any idea how to analyse this?
Thanks
Andre
