Dataset is written into Flash automatically?

RE: Dataset is written into Flash automatically?

Marjeris Romero — Thu, 08 Aug 2019 11:17:24 GMT

Hi Kostiantyn,

You should set FDS_VIRTUAL_PAGES_RESERVED to 4, to move flash end address used by the FDS (OpenThread stack uses 4 flash pages for nRF52840).

Best regards,

Marjeris

RE: Dataset is written into Flash automatically?

Kostiantyn Makhno — Wed, 07 Aug 2019 09:22:19 GMT

and also it can write network setting by 0xfe000

RE: Dataset is written into Flash automatically?

Kostiantyn Makhno — Wed, 07 Aug 2019 09:16:34 GMT

thanks, I got it. But when I use FDS and store some data into Flash, it saves data in the region of memory 0xfc000-0x100000 but it's wrong. Why does it happen?

RE: Dataset is written into Flash automatically?

Marjeris Romero — Wed, 07 Aug 2019 08:06:21 GMT

Hi Kostiantyn,

The network settings will be stored on non-volatile memory, see the OpenThread stack memory layout here. The OpenThread stack persistent storage starts at address 0x00fc in nRF52840, so if you want to save application data you need to do it outside of the persistent storage area.

If you want to erase the network settings you can use otInstanceErasePersistentInfo().

Best regards,

Marjeris

RE: Dataset is written into Flash automatically?

Kostiantyn Makhno — Tue, 06 Aug 2019 08:06:28 GMT

also, every time when I reset MCU it saves into Flash the same network parameter, i.e. if I want to save some data into flash I allocate some memory by i.e. 0xff000 address, my flash section starts with i.e. 0xfc000 address and if I do large number of reset, my section with my data rewrite by parameters that saves thread. Is it bug or feature?

RE: Dataset is written into Flash automatically?

Kostiantyn Makhno — Tue, 06 Aug 2019 07:27:10 GMT

I use memcheck and that's really write some network parameters into Flash