which bootloader flash region can be writed?

[Leo Lin]

Hi Nordic,

I want to write a value from the application layer to the bootloader flash region through uart, and use this value to replace the button 4's function of entering DFU mode.

which bootloader flash region can be writed?

or which flash regions are reserved for customer.

 

Thanks in advance.

Leo.

[SwRa]

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

[Leo Lin]

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.