52810, Can't program the boot loader setting file into flash.

Question

SDK 14.2.0 SR3v1.2 
 nrfutil version:2.3.0 
 Hi, this is my command: 
 nrfutil settings generate --family NRF52 --application PCA20031-SR3_nRF52810_Product_Example.hex --application-version 0x0000 --bootloader-version 0x0000 --bl-settings-version 1 my_setting.hex 
 
 I use the same parameters in nrf52832 and it works, but not in nrf52810. It keeps saying "flash is not erased" when I try to program it after I click erase button in nRf go studio. 
 
 Questions: 
 1.Are application version & bootloader version user-defined? 
 2.bl-setting-version seems only 1, if use other values than 1 will show error message. Is that correct? 
 "The Bootloader settings version.Defined in nrf_dfu_types.h, the following apply to" "released SDKs:|SDK12|1|" 
 I don't find any message specifically tells the settings version in nrf_dfu_types.h . 
 3.In nrf_dfu_setting.c: "s_dfu_settings.settings_version == NRF_DFU_SETTINGS_VERSION" NRF_DFU_SETTINGS_VERSION is NOT referenced or defined anywhere .How? 
 
 Thanks.

Einar Thorsrud · Answer

Hi, 
 The problem is that the hex file generated with the "--family NRF52" option is for the nRF52832 with 512 kB flash, and as the bootloader settings page is located in the end , this is simply outside of the nRF52810 flash (it only has 192 kB flash). The fix is to use "--family NRF52810". Note that this is only supported in recent nrfutil versions, so you should update to the latest (currently 3.5.1). 
 For the specific questions: 
 1. Yes, the application and bootloader version is user-defined. (The limitation is that you can only update to a higher version that the current version.) 
 2. Yes, there is only version "1" (for now). 
 3. The NRF_DFU_SETTINGS_VERSION preprocessor definition is not set in a .c or .h file, but rather in the Makefile or project settings.