Unable to find bootable image - MCUBoot - again

RE: Unable to find bootable image - MCUBoot - again

rpasichnyk — Wed, 27 Apr 2022 08:33:00 GMT

My solution is a bit different. I removed mcuboot overlay completely (not mentioned in previous workaround). Good to know your 2-times-build workaround also works!

RE: Unable to find bootable image - MCUBoot - again

ecsfang — Wed, 27 Apr 2022 08:29:28 GMT

Hi,

The suggestion to use child_image was found in the following issue:
https://devzone.nordicsemi.com/f/nordic-q-a/84564/unable-to-find-bootable-image---mcuboot

I tried the solution given there, but without any success.
For time being, I have just updated the build-script to build two times - crude but works ...

Cheers,

Thomas

RE: Unable to find bootable image - MCUBoot - again

rpasichnyk — Wed, 27 Apr 2022 08:15:48 GMT

Hi Thomas,

I also experience this issue with nRF SDK 1.9.1. I don't really know the reason, but it seems to me there is something wrong with CMake + west + zephyr magic build system. I noticed when I remove MCUboot overlay, the problem goes away.

I have found a workaround. Instead of using MCUboot overlay, I am using child image. The disadvantage of this is that I have to completely duplicate MCUboot configuration since it is not merged with default.

Steps to perform a workaround:

1. Crete a folder in the root of your project child_images/mcuboot/

2. Copy zephyr/bootloader/mcuboot/boot/zephyr/prj.conf to that folder

3. Make required modifications to prj.conf according to your mcuboot-overlay.conf

4. Delete your mcuboot-overlay.conf and reference to it from CMakeLists.txt

Edit: I just noticed you mention child_image in on of your comments, unfortunately the link to your previous ticket does not work for me, so I can't verify if suggested workaround was the same.

RE: Unable to find bootable image - MCUBoot - again

Amanda Hsieh — Wed, 09 Mar 2022 13:22:18 GMT

Hi,

With the hello_world_with_mcuboot_v2.zip provided by Simon, I run the command with nRF52DK as:

west build -b nrf52dk_nrf52832 -p && west flash --recover

And get:

*** Booting Zephyr OS build v2.6.99-ncs1  ***

I: Starting bootloader

I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3

I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3

I: Boot source: none

I: Swap type: none

I: Bootloader chainload address offset: 0xc000

I: Jumping to the first image slot
▒*** Booting Zephyr OS build v2.6.99-ncs1  ***

Hello World! nrf52dk_nrf52832

-Amanda

RE: Unable to find bootable image - MCUBoot - again

ecsfang — Wed, 09 Mar 2022 09:57:56 GMT

Hi Amanda,

As described in the original ticket (the same thread you pointed to), I use west to build:

$ rm -rf build
$ west build --build-dir build/ncs src/ncs
$ nrfjprog -f NRF52 --sectorerase --verify --program build/ncs/mcuboot/zephyr/zephyr.hex
$ nrfjprog -f NRF52 --sectorerase --verify --program build/ncs/zephyr/app_signed.hex
$ nrfjprog -f NRF52 --reset

And yes, I tried the suggestion with the child_image, but it didn't help.

Best regards,
Thomas

RE: Unable to find bootable image - MCUBoot - again

Amanda Hsieh — Wed, 09 Mar 2022 09:53:38 GMT

Hi,

Are you doing pristine builds in VS code? Could you try to use west build? Also, test west build with the example provided by Simon in this thread.

Regards,
Amanda