RE: How can I get the stack pointer from the program?

Håkon Alseth — Wed, 12 Feb 2020 09:18:19 GMT

Hi,

The watchdog will not reset the RAM, but it might be corrupted, as per this instance table (see the note):

If you are to store the stack, you should store it into a non inited global section from the watchdog event handler.

The watchdog interrupt handler will execute approx. 2 RTC cycles before a reset occurs, so you do not have much time.

If possible, you should also add a simple checksum on the content you're storing, to ensure that it has not been corrupted after wdt reset.

Here's a thread, with an example on dumping the stack:

Note that the .non_init section is defined by default in SES, so you don't need to add it manually in flash_placement.xml

Kind regards,

Håkon