How to erase limited flash pages During DFU over bluetoot

RE: How to erase limited flash pages During DFU over bluetoot

Theja — Fri, 27 Oct 2023 04:42:36 GMT

Hi, it's working with "confirm only" option.

What's the difference between "test and coinfirm" and "confirm only", What's actually going on internally?

RE: How to erase limited flash pages During DFU over bluetoot

Vidar Berg — Fri, 20 Oct 2023 15:59:15 GMT

Thanks. Does the new FW image you uploaded also support BLE DFU? Based on the log you shared, it seems that the update wasn't confirmed.

I recommend you try to use our 'Device Manager' app and perform a 'Confirm Only' update and see if that works.

RE: How to erase limited flash pages During DFU over bluetoot

Theja — Fri, 20 Oct 2023 10:22:38 GMT

For the first time using J-link i'm dumping the code and for DFU i'm using nrf connect for mobile app.

RE: How to erase limited flash pages During DFU over bluetoot

Vidar Berg — Fri, 20 Oct 2023 09:24:58 GMT

What app/program are you using to upload the image?

RE: How to erase limited flash pages During DFU over bluetoot

Theja — Thu, 19 Oct 2023 12:44:55 GMT

Hi Berg, Thanks for your help, It was a flash partition-related issue, but it is now operational. However, I have a DFU issue. While I performing DFU for the same device a second time, the Bootloader reverts to the first image and Disconnecting.

prints as shown.

" *** Booting Zephyr OS build v3.2.99-ncs2 ***<CR><LF>
I: Starting bootloader<CR><LF>
I: Primary image: magic=good, swap_type=0x2, copy_done=0x1, image_ok=0x3<CR><LF>
I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3<CR><LF>
I: Boot source: none<CR><LF>
I: Swap type: revert<CR><LF> "

what could be the reason behind this?

RE: How to erase limited flash pages During DFU over bluetoot

Vidar Berg — Wed, 11 Oct 2023 09:22:06 GMT

0x50000 is going to be in that range, so it is not surprising that it is being overwritten. You can use the Memory report action in the VS code extension to find the flash memory layout for your device: https://nrfconnect.github.io/vscode-nrf-connect/guides/memory_overview.html#memory-report-for-partitions

slot 0 = mcbuboot_primary

slot 1 = mcuboot_secondary

RE: How to erase limited flash pages During DFU over bluetoot

Theja — Wed, 11 Oct 2023 09:07:52 GMT

After 0x50000, I'm utilizing it for data storing. I kept 0x0000 to 0x50000 (327kb) for the bootloader and application (my application size is 205kb).

From where to where MCUBoot slot0/slot1 is utilizing in flash?

RE: How to erase limited flash pages During DFU over bluetoot

Vidar Berg — Wed, 11 Oct 2023 08:43:35 GMT

You need to store the data in a partition that is separate from the MCUBoot slot0/slot1 partition. Otherwise, it will be overwritten when you perform a DFU.

Where are you currently storing the data?

RE: How to erase limited flash pages During DFU over bluetoot

Theja — Wed, 11 Oct 2023 06:56:22 GMT

Hi,

[quote userid="4240" url="~/f/nordic-q-a/104370/how-to-erase-limited-flash-pages-during-dfu-over-bluetoot/449026"]The code wouldn't run after DFU if the entire flash was erased[/quote]

I'm saying that while bootloader replacing new firmware is it erasing complete flash memory.

[quote userid="4240" url="~/f/nordic-q-a/104370/how-to-erase-limited-flash-pages-during-dfu-over-bluetoot/449026"]Are you using the storage partition?[/quote]

No, I'm not using stoarge partition.

RE: How to erase limited flash pages During DFU over bluetoot

Vidar Berg — Thu, 05 Oct 2023 13:14:30 GMT

The code wouldn't run after DFU if the entire flash was erased. Where are you storing the Device ID in flash? Are you using the storage partition?

RE: How to erase limited flash pages During DFU over bluetoot

Theja — Thu, 05 Oct 2023 13:08:53 GMT

Hi, I'm stroing devide ID at first and sample information every 10 min,

During restart of my device i'm reading Device ID and sample info both if I restart manually it is reading both, regarding I have added snippet

After DFU those are getting erased , Here is a snippet

RE: How to erase limited flash pages During DFU over bluetoot

Vidar Berg — Wed, 04 Oct 2023 10:53:19 GMT

Hi, can you please show what got erased?

RE: How to erase limited flash pages During DFU over bluetoot

Theja — Wed, 04 Oct 2023 10:50:17 GMT

Hi Berg,

Thanks for the reply, yeah i tried to read out the previously stored contents but those are all erased.

RE: How to erase limited flash pages During DFU over bluetoot

Vidar Berg — Wed, 04 Oct 2023 10:46:27 GMT

Hello,

The bootloader should never erase the whole flash. Did you read out the flash content before and after DFU to confirm that this happened?

Best regards,

Vidar