flash/fds hardfault not traceable

[Juliusc]

I am currently struggling with a problem where Im trying to implement the internal fds module which always leads to hard faults as follows:

There is probably something wrong in my configuration but I can't pinpoint where. The example worked okay so there are no problems on my own PCB. Yet I need support to handle this exception and get the config right!

Best, Julius

[Juliusc]

Its not like I didnt, as I said, there is no other outcome than what I have right now. The event_send is also triggered if I somewhat alter the code and leave out other snippets. 

its an sd_event_IRQHandler that is triggered all of the sudden and probably interfering with anything .

event_send is one of nordics functions in nrf_storage_sd.c triggered by fstorage_sys_evt_handler and at the beginning its sd_event_IRQHandler

Also, I tried this again on my DK and it happened there too now.

When I only init the flash and don't do anything else, it wont crash, as soon as I use fds_stat or any other action on flash write/read it will show this error. 

[Edvin]

If you are able to reproduce this on a DK now, perhaps you can zip your project and upload it here? You can exclude any potential sensitive information. If the project is a strip down, containing only the bare minimum required to reproduce the issue, without too much of your custom code, that would be the best. Then I can try to reproduce it here in the office.

What SDK version are you using?

Best regards,

Edvin

[Juliusc]

flash_corrupt_ex.ziphere you go. I literally deleted everything from my main and excluded all of my files except the flash_init part (I also commented out ble_stack_init() in there) 

I am using 15.3 rn

Thank you Edvin

[Juliusc]

Hi Edvin,

were you already able to check this? 

Greetings

[Edvin]

Hello,

Yes, I was able to look into this on friday, and after modifying the project a bit, (from using printf to NRF_LOG_...(), changing a lot of the absolute paths for your .c files and include folders, are the two main things I remember now), I was able to reproduce the issue. It looks like the FDS is struggling to initialize the flash pages, although I didn't understand why. It requires some more debugging. I am sorry I didn't get back to you today, but I have not forgotten this ticket. I need to look deeper into it. 

I saw that a lot of your project settings vary quite a bit from the normal SDK examples. I am not sure whether this is related to the behavior. And again, I am sorry I don't have a definitive answer for you at this point in time. I will try to look closer into this tomorrow. 

I have, however, tried the unmodified flash_fds example, which doesn't behave the same as your project. I think my approach will be to copy your files into the flash_fds example, and see how it behaves then, to try a different approach, and to eliminate that the project settings may be the issue. Just in case you want to try to debug this as well. 

Best regards,

Edvin