which bootloader flash region can be writed?

RE: which bootloader flash region can be writed?

SwRa — Fri, 26 Nov 2021 12:32:58 GMT

Hi Leo,

You can add either FDS or Fstorage depending upon your comfort. However, I would suggest to use FDS as it is a bit easier to implement. You can refer the FDS example to do this.

Regards,

Swathy

RE: which bootloader flash region can be writed?

Leo Lin — Thu, 25 Nov 2021 13:34:41 GMT

Hi SwRa,

Thank you for your quick reply.

I am trying FDS and fstorage.

So I should add FDS or fstorage to the source code of application and bootloader, because my bootloader must use FDS or fstorage to read the value written to flash. right?

Thank,

Leo.

RE: which bootloader flash region can be writed?

SwRa — Thu, 25 Nov 2021 12:09:32 GMT

Hi Leo,

You can use either FDS or fstorage to do this as both works fine. When using fstorage, you can use any available flash pages i.e., the ones that are not used by softdevice, application and bootloader. Using FDS will be easier and you need not worry about the available flash pages as FDS only uses the flash pages that are allocated to it in the config.

Regards,

Swathy

RE: which bootloader flash region can be writed?

Leo Lin — Thu, 25 Nov 2021 05:29:14 GMT

Hi SwRa,

thank you for your reply.

I have already seen this memory layout but I still don’t know where in the flash (or which page) can be written.

Should I see the status of flash usage to decide? If there is a page that is empty, it can be written.

Another question is should I use Flash Data Storage (FDS) or Flash Storage (fstorage) for writing API? Or is there any other better API?
I only need to write a value to flash, this value can be written from the application, and the value can be read by the bootloader.

Thank in advance.

Leo.

RE: which bootloader flash region can be writed?

SwRa — Tue, 23 Nov 2021 07:59:29 GMT

Hi,

Kindly take a look at the memory layout of different nRF52 chips to get an idea of the flash storage space available to store data.

Regards,

Swathy