RE: what happened when I create a kernel timer (based on the 32k RTC) by nrf connect sdk on nrf 52840 dk?

Håkon Alseth — Mon, 20 Sep 2021 07:20:00 GMT

Hi,

[quote user=""][00:00:09.937,286] [1;31m<err> os: ***** USAGE FAULT *****[0m
[00:00:09.937,316] [1;31m<err> os: Illegal use of the EPSR[0m
[00:00:09.937,316] [1;31m<err> os: r0/a1: 0x0002c2a8 r1/a2: 0x200021d0 r2/a3: 0x200021d0[0m
[00:00:09.937,316] [1;31m<err> os: r3/a4: 0x00000000 r12/ip: 0x00033bf7 r14/lr: 0x00023983[0m
[00:00:09.937,316] [1;31m<err> os: xpsr: 0x60000021[0m
[00:00:09.937,347] [1;31m<err> os: Faulting instruction address (r15/pc): 0x00000000[0m
[00:00:09.937,347] [1;31m<err> os: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0[0m[/quote]

The registers here give you an indication on what the state was when the fault occurred.

Could you try to resolve the flash mapped addresses using "arm-none-eabi-addr2line"?

arm-none-eabi-addr2line -e my_build_folder/zephyr/zephyr.elf 0x23983

arm-none-eabi-addr2line -e my_build_folder/zephyr/zephyr.elf 0x2c2a8

arm-none-eabi-addr2line -e my_build_folder/zephyr/zephyr.elf 0x33bf7

Kind regards,

Håkon