Bootloader returns same address for Bank0 and Bank1

RE: Bootloader returns same address for Bank0 and Bank1

ilockit_CFR — Tue, 26 Mar 2024 06:56:02 GMT

Hi Edvin,

thanks for your hints. I mistakenly created the bootloader settings with the bootloader hex file. Now, as I created it for the application file the size of bank 0 is correct.

Thanks for your help.

RE: Bootloader returns same address for Bank0 and Bank1

Edvin — Mon, 25 Mar 2024 13:40:17 GMT

Hello Christian,

How did you program the application on bank0? Did you transfer it via DFU? Did you program it directly? If so, did you generate and program bootloader settings for your application?

Best regards,

Edvin

RE: Bootloader returns same address for Bank0 and Bank1

ilockit_CFR — Mon, 25 Mar 2024 09:52:36 GMT

Hi,

there was an application present when I checked the start address of bank 1, but I checked it too early. When I check it right before loop_forever() in nrf_bootloader.c I will get the following results:

<debug> app: nrf_dfu_bank0_start_addr() = 0x27000
<debug> app: nrf_dfu_bank1_start_addr() = 0x30000

Now it's different, but my application in bank 0 is bigger than 0x9000 bytes, which causes an overwriting of the main part of the application. So the question remains, where do I set the size of bank 0, because the actual size is not correct?

Best regards,

Christian

RE: Bootloader returns same address for Bank0 and Bank1

Edvin — Fri, 22 Mar 2024 12:56:47 GMT

Hello,

[quote user=""]bank1 is bank0_addr + s_dfu_settings.bank_0.image_size.[/quote]

That is correct. If this image size is 0, then they will have the same address.

Is there an application (in addition to the bootloader) present when you checked and got the same address for bank0 and 1? I guess there was not. If there is an application present, it would set the start of bank 1 directly after the end of bank0, since these are dynamic. So when no image is present in bank0, it doesn't really make sense to talk about the location and size of bank1.

When an application image is present in bank0, then the bootloader will use the address and size of bank1 to determine whether it can store the new application image in bank1 (so that it can fall back to bank0 in case the transfer fails in some way), or if it needs to delete the application in bank0 before starting the transfer of the new application image, and store it directly to bank0.

Best regards,

Edvin