E: Image in the primary slot is not valid!

RE: E: Image in the primary slot is not valid!

Sigurd Hellesvik — Wed, 06 Dec 2023 13:17:29 GMT

[quote user="JianPan"]I didn't use nRF Connect SDK or vanilla zephyr. Actually, I don't know vanilla zephyr. I googled but couldn't find a good link for vanilla zephyr. Could you share more info with me.[/quote]

The nRF Connect SDK is our own SDK built on top of the Zephyr RTOS. Zephyr RTOS can be used as standalone, and in this case I refer to it as "Vanilla Zephyr".

To work with our products, you can use the "Vanilla" Zephyr RTOS, but we recommend the nRF Connect SDK.
I recommend our https://academy.nordicsemi.com/ to get started.

We usually do not build MCUboot as standalone, but rather as part of another application. See https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/config_and_build/bootloaders_and_dfu/index.html

I also have an unofficial introduction to MCUboot with the nRF Connect SDK over at https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/tree/main/bootloader_samples.

Have a look at those and see if you still got the same questions

RE: E: Image in the primary slot is not valid!

JianPan — Wed, 06 Dec 2023 12:28:35 GMT

Hi Sigurd,

Thanks for the quick reply.

I didn't use nRF Connect SDK or vanilla zephyr. Actually, I don't know vanilla zephyr. I googled but couldn't find a good link for vanilla zephyr. Could you share more info with me.

I am using ./zephyr/zephyrproject/bootloader/mcuboot to do the tests. It come with west command while I installed zephyr.

host@vm:~/zephyr/zephyrproject/bootloader/mcuboot$ git branch -a
* (HEAD detached at refs/heads/manifest-rev)
manifest-rev
host@vm:~/zephyr/zephyrproject/bootloader/mcuboot$ git log -1
commit 05d11942774fc15b90af101232ec5305051216ec (HEAD, manifest-rev)
Author: Jamie McCrae <jamie.mccrae@nordicsemi.no>
Date: Wed Aug 16 07:39:37 2023 +0100

docs: release: Add note on firmware loader mode

Adds a note on the new firmware loader operation type

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>
host@vm:~/zephyr/zephyrproject/bootloader/mcuboot$

After building the binary, I used west flash command to flash bootloader and application. The first west flash looks good. I can see the nrf52840_mdk change to dfu mode. I am not sure if west flash is the correct command to flash the application. I tried sudo dfu-util command too, but didn't work.

Is there any way or command I can dump the memory from nrf52840_mdk board? How can I recover the nrf52840_mdk board to this state?

Thanks,

RE: E: Image in the primary slot is not valid!

Sigurd Hellesvik — Wed, 06 Dec 2023 11:31:06 GMT

Hi,

First, let me ask: Do you use the nRF Connect SDK or vanilla zephyr?

Regards,
Sigurd Hellesvik