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 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

[Leo Lin]

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.