nrf5340 BLE FOTA With QSPI flash

[REDHAT]

Hi

From the past few days, I have been trying to perform FOTA with BLE using external QSPI flash. However, I'm unsure if I'm creating the proper files and adding the correct configuration.
I need to perform simultaneous updates for both cores of the nRF5340. 

This are the configuration i have done

1. prj.conf

# Enable the LBS service
CONFIG_BT_LBS=y
CONFIG_BT_LBS_POLL_BUTTON=y
CONFIG_DK_LIBRARY=y

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048




CONFIG_BOOTLOADER_MCUBOOT=y
CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y


CONFIG_NRF53_UPGRADE_NETWORK_CORE=y
CONFIG_UPDATEABLE_IMAGE_NUMBER=2

2.cpuapp.overlay

/ {
    chosen {
        nordic,pm-ext-flash = &mx25r64;
    };
};

3. this are the files I have created
child_image folder
under child image
1.hci_ipc.conf
2.mcuboot.conf
3.mcuboot.overlay

4.mcuboot.overlay
   EMPTY FILE

5. hci_ipc.conf

CONFIG_SERIAL=y
CONFIG_LOG=y
CONFIG_LOG_DEFAULT_LEVEL=4
CONFIG_MAIN_STACK_SIZE=2048

6.mcuboot.conf

# Enable QSPI drivers for external flash
CONFIG_NORDIC_QSPI_NOR=y

# Increase max image sectors to handle larger slot sizes
CONFIG_BOOT_MAX_IMG_SECTORS=256

# Logging
CONFIG_LOG=y
CONFIG_MCUBOOT_LOG_LEVEL_WRN=y

# Enable simultaneous multi-core updates
CONFIG_NRF53_MULTI_IMAGE_UPDATE=y
CONFIG_UPDATEABLE_IMAGE_NUMBER=2
CONFIG_BOOT_UPGRADE_ONLY=y
CONFIG_PCD_APP=y

# Dependencies for CONFIG_NRF53_MULTI_IMAGE_UPDATE
CONFIG_FLASH=y
CONFIG_FLASH_SIMULATOR=y
CONFIG_FLASH_SIMULATOR_DOUBLE_WRITES=y
CONFIG_FLASH_SIMULATOR_STATS=n

this is the error I am getting right now 




I am new to the nRF controller. Kindly let me know what mistakes I am making. Based on the errors I’m seeing, there seems to be a partition issue. I need to know what configurations are required and where I need to apply them.

Additionally, I need to add a secure bootloader to this, and I would like to know how to do that as well.

Kindly support on this!!!!!!!!!!

[Vidar Berg]

Hello,

The mcuboot.overlay must also select the QSPI flash device to enable the bootloader to access the external flash:

/ {
    chosen {
        nordic,pm-ext-flash = &mx25r64;
    };
};

Please try to see if it works after making this change.

Best regards,

Vidar

[REDHAT]

Hi Vidar,

Thanks for the replay!!!


I added the to the code to  mcuboot.overlay. 

Additionally i have created empty pm_static.yml file inside the child_image

now this is the error that i am getting.

[REDHAT]

Hi Vidar
good day!!!

I have tested the simultaneous updates it went success now it working.
The reason for previous error is app.conf file is not created.
while the updating the firmware I have received this logs E: Failed to open flash area ID 1: -2
this are the logs 


is this a problem?

kindly let me know process for secure boot loader.

Thank you for your support!!!

[Vidar Berg]

Hi,

The error message is safe to ignore. It is raised when the app tries to access the emulated flash partition in RAM (partition used to transfer netcore image to the netcore bootloader). With regards to secure boot, this is enabled by enabling CONFIG_SECURE_BOOT.

Best regards,

Vidar

[REDHAT]

Hi Vidar,

Good day!

I apologize for the misunderstanding. What I meant by "secure bootloader" is changing the MCU Boot key for production. Could you please let me know what changes I need to make?

I tried configuring and adding the key, but I ended up with an error.

Thank you!

[Vidar Berg]

Hi, no worries. Here is a sample that selects a custom signing key: https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/tree/main/bootloader_samples/keys_and_signatures 

[REDHAT]

I have configured 
mcuboot.cong

CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256=y

custom_priv.pem

-----BEGIN PRIVATE KEY-----
MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgdiJYhJlSj/e5KZuw
3u2fgv6z1fkBBr5fWTvQ4u2N0DKhRANCAASAyC69sKud5kULGkuNATqGyMIvffqu
A1lHbcrS6A8y1q4mBubB5GEzk3XLgXiIDhqMrmojVeC8TTIBNqgezUq7
-----END PRIVATE KEY-----

CMakeLists.txt

set(mcuboot_CONFIG_BOOT_SIGNATURE_KEY_FILE  "C:/ncs/peripheral_lbs_O!/custom_key_dir/custom_priv.pem")

this is the error i am getting

[Vidar Berg]

You need to escape the quotation marks with '\' if you want to set the symbol from your CMake file as done in the sample here: https://github.com/hellesvik-nordic/samples_for_nrf_connect_sdk/blob/ff9429012a8731df7966e5cf777bb4b2310559f7/bootloader_samples/keys_and_signatures/mcuboot_smp_custom_key/CMakeLists.txt#L5