Some FDS pages are FDS_PAGE_UNDEFINED

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Julien — Wed, 04 Oct 2023 07:27:42 GMT

Hi,

Only for this board.

I think we will assume the tired flash.

Thanks for the support.

Regards,

Julien

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Jared — Tue, 03 Oct 2023 12:50:42 GMT

Hi,

So I tried reproducing your result using nRF Connect Programmer Application and the flash_fds example, with the nRF52 development kit,

I first flashed kit with the flash_fds example:

I then erased it:

As you can see the whole flash was erased, I then tried re writing to it with the Softdevice and the application:

[quote user="Julien F"]I except the same thing, but with this tag, some data are not erase ONLY with this tag (strange).[/quote]

Is this on all your boards or only the boards that had the previous issue? If some of the boards already have a tired flash then this might be a symptom of it,

regards

Jared

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Julien — Mon, 02 Oct 2023 14:18:04 GMT

I except the same thing, but with this tag, some data are not erase ONLY with this tag (strange).

Yes, with v17.1 the flash looks good.

Regards,

Julien

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Jared — Mon, 02 Oct 2023 12:28:54 GMT

hmm strange, I would expect the whole flash to be erased when you do an erase.

But other than that, you are not able to reproduce the issue with v17.1 right?

regards

Jared

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Julien — Fri, 29 Sep 2023 09:36:43 GMT

Hmmm, it's a bit strange when i am testing with SDK v17.1

I have no FDS_PAGE_UNDEFINED. And the flash seems correct

When i erase all the chip with nrf connect i keep data on my stack (see below)

Then if i erase and write with the SD 132 v 7.2, the previous bytes have disapeared.

I'm a bit confused.

Regards,

Julien

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Jared — Fri, 29 Sep 2023 09:02:20 GMT

Hmm, then it sounds like a bug.

Have you tried reproducing it with SDK v17.1.0?

regards

Jared

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Julien — Fri, 29 Sep 2023 08:55:30 GMT

The init routine are successful, i got FDS_SUCCESS and i have the FDS_EVT_INIT with FDS_SUCCESS result also

Regards,

Julien

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Jared — Fri, 29 Sep 2023 08:27:58 GMT

Hi,

Is the init routine successful? Do you check the return value from fds_init ()?

regards

Jared

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Julien — Fri, 29 Sep 2023 08:23:51 GMT

Hi Jared,

Thanks i will change that.

I try to see if my FDS was corrupt with fds_stat function, but i don't get the corruption flag, is it normal ?

Best regards,

Julien

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Jared — Fri, 29 Sep 2023 08:17:03 GMT

Hi Julien,

Yes, I agree. I think there is a chance that the flash has been worn out, due to many flash erase/write cycles. If you run GC each time the device resets then it will more quickly reach this flash erase/write cycle limit, especially if the device is put into a state where it resets often.

You should only do GC when you have and not during the init routine except if the flash is full.

regards

Jared

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Julien — Thu, 28 Sep 2023 13:50:38 GMT

Hi Jared,

Actually i see only one device with this issue.

I run the GC at the init and when i have no space in flash.

After a full erase, some part are not reset to 0xF, i guess the flash is broke, do you agree ?

Thanks,

Julien

RE: Some FDS pages are FDS_PAGE_UNDEFINED

Jared — Wed, 27 Sep 2023 13:18:40 GMT

Hi,

This sounds strange, can't say I recall seeing this exact issue, but a bunch of FDS issues were patched in our newer nRF5SDK versions such as v17.1.0. Have you been able to reproduce the issue with that or any newer SDK versions?

How many devices do you see this issue on, only one?

How often in your code do you run the garbage collector?

If you do a full erase, is there still some 0s that hasn't been reset to 0xF?

regards

Jared