BLE OTA using external flash, E: Image in the primary slot is not valid! E: Unable to find bootable image

[Juandgarcia]

Hi, I'm trying to use BLE OTA  with an external memory due to my application is too big to do it only with the internal memory. When I use OTA config with internal memory, all works ok, but when I try to use it with the external, I get the following error at boot: 

*** Booting nRF Connect SDK v2.5.0 ***
I: Starting bootloader
W: Failed reading sectors; BOOT_MAX_IMG_SECTORS=128 - too small?
E: Image in the primary slot is not valid!
E: Unable to find bootable image

This is my partition report: 

external_flash (0x4ee000 - 5048kB):
+-----------------------------------------------+
| 0x0: external_flash (0x400000 - 4096kB) |
| 0x400000: mcuboot_secondary (0xee000 - 952kB) |
+-----------------------------------------------+

flash_primary (0x100000 - 1024kB):
+-------------------------------------------------+
| 0x0: mcuboot (0xc000 - 48kB) |
+---0xc000: mcuboot_primary (0xee000 - 952kB)-----+
| 0xc000: mcuboot_pad (0x200 - 512B) |
+---0xc200: mcuboot_primary_app (0xede00 - 951kB)-+
| 0xc200: app (0xede00 - 951kB) |
+-------------------------------------------------+
| 0xfa000: nvs_storage (0x6000 - 24kB) |
+-------------------------------------------------+

sram_primary (0x40000 - 256kB):
+--------------------------------------------+
| 0x20000000: sram_primary (0x40000 - 256kB) |
+--------------------------------------------+

My .config settings:

CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y

CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU_SPEEDUP=y

# CONFIG_MCUMGR=y

# CONFIG_MCUMGR_TRANSPORT_BT=y

CONFIG_BOOTLOADER_MCUBOOT=y

CONFIG_REBOOT=y

CONFIG_NORDIC_QSPI_NOR=y

CONFIG_FLASH_MAP=y

CONFIG_PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY=y

CONFIG_PM=y

mcuboot.config: 

CONFIG_BOOT_UPGRADE_ONLY=y

CONFIG_MCUBOOT_DOWNGRADE_PREVENTION=y

CONFIG_NORDIC_QSPI_NOR=y

# Enable flash operations

CONFIG_FLASH=y

# enable to get log output on uart

CONFIG_LOG=y

CONFIG_LOG_MODE_IMMEDIATE=y

CONFIG_SERIAL=y

CONFIG_LOG_BACKEND_UART=y

CONFIG_FLASH_LOG_LEVEL_DBG=y

CONFIG_MCUBOOT_LOG_LEVEL_DBG=y

CONFIG_BOOT_MAX_IMG_SECTORS= 256

mcuboot.overlay: 

/ {

    chosen {

        nordic,pm-ext-flash = &mx25r64;

    };

};

I looked at some post, but couldn´t find the same error. 

[Håkon Alseth]

Hi,

 

The run-time output here:

W: Failed reading sectors; BOOT_MAX_IMG_SECTORS=128 - too small?

does not align with the configuration that you shared here:

CONFIG_BOOT_MAX_IMG_SECTORS= 256

This also has a whitespace after the equal sign, which will cause a problem when configuring your project.

 

Could you double-check that your mcuboot child image indeed has this configuration set? It might be relevant to delete the build and reconfigure the project to ensure everything is reloaded properly.

 

Kind regards,

Håkon

[Juandgarcia]

Hi, removed the withspace and deleted the build, but still have the same error. I'm attaching my tree, if maybe there is something wrong.

Thanks

[Håkon Alseth]

Hi,

 

Thanks for sharing. It looks like the configuration is not picked up for your board.

Try renaming "child_image/mcuboot/boards/mcuboot.conf" to "child_image/mcuboot/boards/nrf52840dk_nrf52840.conf" and see if this now works better.

 

Kind regards,

Håkon

[Juandgarcia]

Still the same.

Maybe I'm missing something in the prj build?? 

[Juandgarcia]

Hi, it's fixed. I was selecting the wrong board at the build config. 

Thanks,

[Håkon Alseth]

Glad to hear that it worked out!

 

Kind regards,

Håkon