Save register information when watchdog reset.

[jay2242]

Hi,
I use NRF52833 and SW: NCS version 1.4.1 and its zephyr version is 2.4.0.

I would like to know if there is method to record program counter, stack pointer information when watchdog reset occurs?

I know there is thread mentioned an example on dumping the stack. However, it seems not match my SW version.
    devzone.nordicsemi.com/.../saving-the-location-of-watchdog-timeout

Thanks

[jay2242]

Hi Swathy
Thanks for your example: watchdog.zip.

I tested it on my code. During test, I always get printk message "CRC mismatch".
Then I print computed_crc, esf_crc and esf as below for your checking.

computed_crc: 420107693 esf_crc: 0
Exception stack frame:
r0/a1: 0x00000000 r1/a2: 0x00000000 r2/a3: 0x00000000
r3/a4: 0x00000000 r12/ip: 0x00000000 r14/lr: 0x00000000
xpsr: 0x00000000 pc: 0x00000000

Thanks,

jay2242

[SwRa]

Hi Jay,

Could you provide the map file that is located in <build directory>/zephyr/zephyr.map ?

Regards,

Swathy

[jay2242]

Hi Swathy,

I attached zephyr_map.zip. Please unzip it.

zephyr_map.zip

Thanks

[SwRa]

Hi Jay,

It looks like you are declaring the esf and the esf_crc variable in wdt_stack.h. So the variables get duplicated in main.c and watchdog.c. The variable declaration should be in one of the source files.

Regards,

Swathy

[jay2242]

Hi Swathy,

Thanks for your reminding. Its works now.

Thanks