mcuboot, Image in the primary slot is not valid, Unable to find bootable image

RE: mcuboot, Image in the primary slot is not valid, Unable to find bootable image

Vidar Berg — Thu, 04 Jul 2024 12:10:01 GMT

Yes, you can disable individual features that you don't need. For instance, coded PHY. The linker will remove sections from the library if it is able to determine that they are not being used.

RE: mcuboot, Image in the primary slot is not valid, Unable to find bootable image

LongQi — Mon, 01 Jul 2024 07:18:55 GMT

Does it mean we can not disable the features individually? such as "Coded PHY (Long Range)", "Connectionless CTE Advertising" and "Connection CTE Response", we can not disable them if we use multiole, is that so?

RE: mcuboot, Image in the primary slot is not valid, Unable to find bootable image

Sigurd Hellesvik — Fri, 28 Jun 2024 09:13:29 GMT

As you can see here, there looks to be three alternatives:

So it will depend on if your device is Peripheral, Central or Multirole.

CONFIG_BT_PERIPHERAL=y => Peripheral-only SoftDevice Controller
CONFIG_BT_CENTRAL=y => Central-only SoftDevice Controller
CONFIG_BT_CENTRAL=y and CONFIG_BT_PERIPHERAL=y => Multirole SoftDevice Controller

In addition to this, I think Bluetooth Memory Optimization could reduce the space as well.
I suggest you try these tips and see if they reduce the size of NPL. If it does not help, let me know and we will help you look more into this

RE: mcuboot, Image in the primary slot is not valid, Unable to find bootable image

LongQi — Thu, 27 Jun 2024 07:55:17 GMT

how do I disable the features in the SoftDevice Controller? It seems not mentioned in the document.

RE: mcuboot, Image in the primary slot is not valid, Unable to find bootable image

Sigurd Hellesvik — Wed, 26 Jun 2024 12:38:59 GMT

I think the largest part of this will be the SoftDevice Controller.
The size of this will vary based on the features you use.
See Softdevice Controller docs.

RE: mcuboot, Image in the primary slot is not valid, Unable to find bootable image

LongQi — Tue, 25 Jun 2024 02:42:24 GMT

Is there a user guide or whitepaper to optimise NPL? my application only occupies 2%

https://docs.nordicsemi.com/bundle/ncs-2.6.1/page/zephyr/develop/optimizations/index.html

https://docs.nordicsemi.com/bundle/ncs-2.6.1/page/nrf/test_and_optimize/optimizing/memory.html

Are these all available for the optimization?

RE: mcuboot, Image in the primary slot is not valid, Unable to find bootable image

Sigurd Hellesvik — Mon, 24 Jun 2024 12:27:10 GMT

Hi,

[quote user=""] FLASH: 229048 B 232960 B 98.32%[/quote]

There is a known issue that application size must be smaller than 95% when using MCUboot.

Try to decrease flash space of your app, or add external flash.

Regards,
Sigurd Hellesvik

RE: mcuboot, Image in the primary slot is not valid, Unable to find bootable image

LongQi — Fri, 21 Jun 2024 09:01:20 GMT

I tried every commit in my repo and it eventually works after I disabled CONFIG_UART_ASYNC_API and removed uart related program.

May I know what the reason is?