Flashing bootloader and application via J-Link

[Nikita]

Hello. I want to make flashing of devices for production faster. So I want to write application together with bootloader via J-Link simultaneously and not via OTA DFU. I'm using S110 v6 and dual bank BLE DFU from SDK 5.1 example. I know that after flashing bootloader and application I just need to compute CRC16 of the DFU bank 0 and write this value to the bootloader settings in the flash, but maybe someone already has a solution to this problem?

[John]

I believe you can accomplish what you want by changing the following line in bootloader_util_arm.c from:

uint8_t __attribute__((section (".bootloader_settings_sect"))) m_boot_settings[CODE_PAGE_SIZE] __attribute__((used));

To:

uint8_t  m_boot_settings[CODE_PAGE_SIZE] __attribute__((at(BOOTLOADER_SETTINGS_ADDRESS))) __attribute__((used)) = {BANK_VALID_APP};

Then you can program your merged app and bootloader with nrfjprog without it thinking the application is not valid.

[Justin]

if anyone is trying to do this with GCC you have to make sure to edit the linker script and remove the "NOLOAD" attribute from the bootloadSettings section.