Bootloader update (mcuboot)

[Shikamaru]

Hi,

  I'm using a nrf52832 board. In this case, updating the bootloader is necessary. So, does mcuboot have a way to update itself? , and if not, what alternative method of doing this is there? 

Regards,

Shikamaru

[dejans]

Hi,

You could take a look at supported bootloaders, second-stage upgradable bootloader and adding upgradable bootloader.

Best regards,
Dejan

[Shikamaru]

thanks dejans ,

           However , I have one doubt here , consider a situation , I have a valid application which is running fine, and then I have updated the mcuboot which is second stage upgradable bootloader from immutable bootloader , then after upgrading the mcuboot , how the new mcuboot image will get to know that , which is valid application image ?

[dejans]

Hi,

Do you want to upgrade application after you upgrade MCUboot?

Best regards,
Dejan

[Shikamaru]

dejans said:

Do you want to upgrade application after you upgrade MCUboot?

yes this also one of the requirement , however my doubt is that , after mcuboot upgradation how this new mcuboot get to know about the correct application , ( which application it supposed to boot ) .

[dejans]

Hi,

Shikamaru said:

after mcuboot upgradation how this new mcuboot get to know about the correct application , ( which application it supposed to boot )

You can take a look at image slots to get more information on how the images are upgraded. MCUboot requires 2 image slots - one for application which is going to be booted and second for new application. You can read more about MCUboot partitions. Partition Manager  is activated for all multi-image builds and it is used  to set start addresses and sizes of all flash and RAM partitions in multi-image builds. Additionally, you can read about management subsystem MCUmgr and image management provided by mcumgr.

Best regards,
Dejan