SDK12.2 Program Secure bootloader and application

[Keton]

I'm trying to program both Secure bootloader and application code using J-Link, preferably as a single hex file. After reset board is stuck in bootloader. UICR is programmed correctly and I'm able to upload code via DFU so I guess proper configuration of bootloader settings page in flash is needed. For now it looks as follows:

λ nrfjprog --family nrf52 --memrd 0x0007F000 --n 352
0x0007F000: AC871054 00000001 00000000 00000000   |T...............|
0x0007F010: 00000000 00000000 00000000 00000000   |................|
0x0007F020: 00000000 00000000 00000000 00000000   |................|
0x0007F030: 00000000 00000000 00000000 00000000   |................|
0x0007F040: 00000000 00000000 00000000 00000000   |................|
0x0007F050: 00000000 00000000 00000000 00000000   |................|
0x0007F060: 00000000 00000000 00000000 00000000   |................|
0x0007F070: 00000000 00000000 00000000 00000000   |................|
0x0007F080: 00000000 00000000 00000000 00000000   |................|
0x0007F090: 00000000 00000000 00000000 00000000   |................|
0x0007F0A0: 00000000 00000000 00000000 00000000   |................|
0x0007F0B0: 00000000 00000000 00000000 00000000   |................|
0x0007F0C0: 00000000 00000000 00000000 00000000   |................|
0x0007F0D0: 00000000 00000000 00000000 00000000   |................|
0x0007F0E0: 00000000 00000000 00000000 00000000   |................|
0x0007F0F0: 00000000 00000000 00000000 00000000   |................|
0x0007F100: 00000000 00000000 00000000 00000000   |................|
0x0007F110: 00000000 00000000 00000000 00000000   |................|
0x0007F120: 00000000 00000000 00000000 00000000   |................|
0x0007F130: 00000000 00000000 00000000 00000000   |................|
0x0007F140: 00000000 00000000 00000000 00000000   |................|
0x0007F150: 00000000 00000000 00000000 FFFFFFFF   |................|

and

λ nrfjprog --family nrf52 --memrd 0x10001014 --n 8
0x10001014: 00073000 0007E000                     |.0......|

I guess that I have to tell the bootloader that application is flashed and recalculate crc but how should I do it?

[Vidar Berg]

Hi,

That is correct, the bootloader will stay in dfu mode unless the application has been marked as valid in the bootloader settings page with the correct checksum value. You can use nrfutil to gerenate this page as explained here. You can then merge it with the bootloader, application and softdevice to get a single .hex file (merge tool include in command line tools package).

[Keton]

this works nicely, thank you.