Save register information when watchdog reset.

RE: Save register information when watchdog reset.

jay2242 — Tue, 19 Oct 2021 09:09:53 GMT

Hi Swathy,

Thanks for your reminding. Its works now.

Thanks

RE: Save register information when watchdog reset.

SwRa — Fri, 15 Oct 2021 14:09:13 GMT

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

RE: Save register information when watchdog reset.

jay2242 — Fri, 15 Oct 2021 09:08:17 GMT

Hi Swathy,

I attached zephyr_map.zip. Please unzip it.

devzone.nordicsemi.com/.../zephyr_5F00_map.zip

Thanks

RE: Save register information when watchdog reset.

SwRa — Fri, 15 Oct 2021 07:45:39 GMT

Hi Jay,

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

Regards,

Swathy

RE: Save register information when watchdog reset.

jay2242 — Fri, 15 Oct 2021 03:06:20 GMT

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

RE: Save register information when watchdog reset.

SwRa — Thu, 14 Oct 2021 13:55:41 GMT

Hello,

The experts in our team has been working on this case and have managed to come out with a way to do this. However, it is not fully tested, but it should be ok for debugging purpose. You can take a look at the file I am attaching.

devzone.nordicsemi.com/.../watchdog.zip

Regards,

Swathy

RE: Save register information when watchdog reset.

SwRa — Wed, 13 Oct 2021 13:36:49 GMT

Hi Jay,

Sorry for the late reply. I contacted the experts and it is unlikely to do this. Right now, it is not possible to unwind the stack from the WDT callback as there are no helper functions in zephyr to do this. So my answer is that it is not supported.

Regards,

Swathy

RE: Save register information when watchdog reset.

SwRa — Fri, 08 Oct 2021 11:41:00 GMT

Hi Jay,

The watchdog example in that thread is run using nRF5 SDK while you are using nRF Connect SDK(NCS). In NCS, you can find a Watchdog example in NCS\v1.7.0\zephyr\samples\drivers\watchdog. However, the example doesn't demonstrate how to record the stack pointer information when watchdog reset occurs. I will look into it and get back to you on Monday.

Regards,

Swathy