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  • Case ID: 299189
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MCUBoot runtime error: "Cannot upgrade: not a compatible amount of sectors" with external flash on nrf9160

jeremyherbert

Hi,

I am using NCS 2.1.2 with the [email protected] (but I have tested with 2.2.0-rc1 and it doesn't change anything). I have attached a simple example which should just place the MCUBoot secondary partition in the external flash with pm_static.yml. I am using the firmware here: https://github.com/simon-iversen/sdk-nrf/tree/d1a11f2c39e3b8fb0af7652e7e720626f0e1298e/samples/nrf9160/http_update/application_update to connect the NOR flash to the nrf91.

This appears to compile fine, but, on bootup I get the following errors printed by the bootloader:

W: Failed reading sectors; BOOT_MAX_IMG_SECTORS=256 - too small?
W: Cannot upgrade: not a compatible amount of sectors

On stepping through the code, it appears that the flash_area_get_sectors function is returning -22 (EINVAL) for the secondary partition on the external flash because flash_area_open is failing with -19 (ENODEV). However, I know that the flash is working fine because (in the second example attached) littlefs on the external flash formats and mounts correctly.

I found in another thread this fix for a similar problem: https://github.com/nrfconnect/sdk-nrf/pull/9169/files# (I unfortunately cannot find the thread again) but I have applied this patch and it does not seem to change anything.

Could you please help me understand what the problem is here?

Thanks,

Jeremy

8156.nrf9160dk_extflash_mcuboot.zip

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  • 0

    Hi,

    I am unable to build nrf9160dk_extflash_mcuboot, and get the error

    devicetree error: /chosen: undefined node label 'mx25r64'

    Board: nrf9160dk_nrf9160_ns
    nRF Connect Version: v2.1.2

    Preparation:

    Set the PROG/DEBUG SW10 switch (SW5 for v0.9.0 and earlier) on the nRF9160 DK to 'nRF52'
Build and flash the sample https://github.com/simon-iversen/sdk-nrf/tree/ext_flash_mcuboot_91dk/samples/connect_ext_flash_to_9160 using the command west build -b nrf9160dk_nrf52840 -p && west flash
Set the PROG/DEBUG SW10 switch (SW5 for v0.9.0 and earlier) on the nRF9160 DK to 'nRF91'

    Did I miss anything to build your project?

    Regards,
    Sigurd Hellesvik

Reply
  • 0

    Hi,

    I am unable to build nrf9160dk_extflash_mcuboot, and get the error

    devicetree error: /chosen: undefined node label 'mx25r64'

    Board: nrf9160dk_nrf9160_ns
    nRF Connect Version: v2.1.2

    Preparation:

    Set the PROG/DEBUG SW10 switch (SW5 for v0.9.0 and earlier) on the nRF9160 DK to 'nRF52'
Build and flash the sample https://github.com/simon-iversen/sdk-nrf/tree/ext_flash_mcuboot_91dk/samples/connect_ext_flash_to_9160 using the command west build -b nrf9160dk_nrf52840 -p && west flash
Set the PROG/DEBUG SW10 switch (SW5 for v0.9.0 and earlier) on the nRF9160 DK to 'nRF91'

    Did I miss anything to build your project?

    Regards,
    Sigurd Hellesvik

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