https://devzone.nordicsemi.com/f/nordic-q-a/94979/mcuboot-doesn-t-switch-to-pending-imageHello, I&#39;ve a &quot;follow up&quot; issue related to this ticket: In an earlier state of our project, we&#39;ve adopted the smp_svr application as our &quot;DFU&quot;. But during maturation of our project, we developed our own DFU. Now, it happens that we have ~40 assembleden-USTelligent Community 13Wed, 21 Dec 2022 12:05:47 GMThttps://devzone.nordicsemi.com/thread/401694?ContentTypeID=1Wed, 21 Dec 2022 12:05:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:157ea7c8-142d-4bfd-95fa-b050fa1e3587Sigurd Hellesvik<p>Hi,</p> <p>I am not sure why those would be in different order, but it just might interfere with stuff. Try to change it to be consistent and maybe it will behave differently?</p> [quote user=""]Any ideas on how to debug this?[/quote] <p>MCUboot runs <a href="https://github.com/nrfconnect/sdk-mcuboot/blob/main/boot/zephyr/main.c">mcuboot/boot/zephyr/main.c</a>, which in calls do_boot from <a href="https://github.com/nrfconnect/sdk-mcuboot/blob/main/boot/bootutil/src/loader.c">mcuboot/boot/bootutil/loader.c</a>.<br />I suggest that you debug or add prints here to follow what is happening.</p> <p>Regards,<br />Sigurd Hellesvik</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/401339?ContentTypeID=1Mon, 19 Dec 2022 16:44:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f6cdeed5-8f53-4b26-b1a7-38ba4aa89181Vagner Landskron<p>Humm, actually I didn&#39;t put any effort into this, everything is &quot;default&quot;.</p> <p>Sure, here it is:</p> <p><strong>smp_svr</strong> partitions.yml (Nordic&#39;s)</p> <p><pre class="ui-code" data-mode="text">app: address: 0xc200 end_address: 0x46000 region: flash_primary size: 0x39e00 mcuboot: address: 0x0 end_address: 0xc000 placement: before: - mcuboot_primary region: flash_primary size: 0xc000 mcuboot_pad: address: 0xc000 end_address: 0xc200 placement: align: start: 0x1000 before: - mcuboot_primary_app region: flash_primary size: 0x200 mcuboot_primary: address: 0xc000 end_address: 0x46000 orig_span: &amp;id001 - mcuboot_pad - app region: flash_primary sharers: 0x1 size: 0x3a000 span: *id001 mcuboot_primary_app: address: 0xc200 end_address: 0x46000 orig_span: &amp;id002 - app region: flash_primary size: 0x39e00 span: *id002 mcuboot_secondary: address: 0x46000 end_address: 0x80000 placement: after: - mcuboot_primary align: start: 0x1000 align_next: 0x1000 region: flash_primary share_size: - mcuboot_primary size: 0x3a000 sram_primary: address: 0x20000000 end_address: 0x20020000 region: sram_primary size: 0x20000 </pre></p> <p><span><strong>Our DFU</strong> partitions.yml&nbsp;</span></p> <p><span><pre class="ui-code" data-mode="text">app: address: 0xc200 end_address: 0x46000 region: flash_primary size: 0x39e00 mcuboot: address: 0x0 end_address: 0xc000 placement: before: - mcuboot_primary region: flash_primary size: 0xc000 mcuboot_pad: address: 0xc000 end_address: 0xc200 placement: align: start: 0x1000 before: - mcuboot_primary_app region: flash_primary size: 0x200 mcuboot_primary: address: 0xc000 end_address: 0x46000 orig_span: &amp;id001 - app - mcuboot_pad region: flash_primary sharers: 0x1 size: 0x3a000 span: *id001 mcuboot_primary_app: address: 0xc200 end_address: 0x46000 orig_span: &amp;id002 - app region: flash_primary size: 0x39e00 span: *id002 mcuboot_secondary: address: 0x46000 end_address: 0x80000 placement: after: - mcuboot_primary align: start: 0x1000 align_next: 0x1000 region: flash_primary share_size: - mcuboot_primary size: 0x3a000 sram_primary: address: 0x20000000 end_address: 0x20020000 region: sram_primary size: 0x20000 </pre></span></p> <p><span></span></p> <p><span><strong>Our Application</strong> partitions.yml</span></p> <p><span><pre class="ui-code" data-mode="text">app: address: 0xc200 end_address: 0x46000 region: flash_primary size: 0x39e00 mcuboot: address: 0x0 end_address: 0xc000 placement: before: - mcuboot_primary region: flash_primary size: 0xc000 mcuboot_pad: address: 0xc000 end_address: 0xc200 placement: align: start: 0x1000 before: - mcuboot_primary_app region: flash_primary size: 0x200 mcuboot_primary: address: 0xc000 end_address: 0x46000 orig_span: &amp;id001 - app - mcuboot_pad region: flash_primary sharers: 0x1 size: 0x3a000 span: *id001 mcuboot_primary_app: address: 0xc200 end_address: 0x46000 orig_span: &amp;id002 - app region: flash_primary size: 0x39e00 span: *id002 mcuboot_secondary: address: 0x46000 end_address: 0x80000 placement: after: - mcuboot_primary align: start: 0x1000 align_next: 0x1000 region: flash_primary share_size: - mcuboot_primary size: 0x3a000 sram_primary: address: 0x20000000 end_address: 0x20020000 region: sram_primary size: 0x20000 </pre></span></p> <p><span>Between <strong>Our DFU</strong> and <strong>Our Application</strong>, there are no differences.</span></p> <p><span>But between <strong>Our DFU</strong> and <strong>smp_svr</strong> there is this small difference, could it be the cause?</span></p> <p><span><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1671468169978v1.png" alt=" " /></span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/401315?ContentTypeID=1Mon, 19 Dec 2022 15:19:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2dfb48b1-9307-49ce-9e8c-0d5d70c63ec2Sigurd Hellesvik<p>Hi,</p> <p>Are your partitions the same size before and after the DFU?</p> <p>Can you upload build/partitions.yml from&nbsp; both your old and your new project?</p> <p>Regards,<br />Sigurd Hellesvik</p><div style="clear:both;"></div>