I have been trying to get DFU working on an nRF5340-based custom board. I want to be able to update the network core and application over USB using mcumgr. I would also like to be able to update the network core over Bluetooth, but the USB serial capability is more important.
I am using NCS 2.3.0.
Here is MCUBoot's configuration:
CONFIG_MCUBOOT_SERIAL=y CONFIG_BOOT_SERIAL_CDC_ACM=y CONFIG_BOOT_SERIAL_DETECT_DELAY=5000 CONFIG_BOOT_SERIAL_MAX_RECEIVE_SIZE=4096 CONFIG_BOOT_SERIAL_UNALIGNED_BUFFER_SIZE=128 # *snip* CONFIG_PCD_APP=y CONFIG_NRF53_MULTI_IMAGE_UPDATE=y CONFIG_FLASH_SIMULATOR=y CONFIG_FLASH_SIMULATOR_DOUBLE_WRITES=y CONFIG_FLASH_SIMULATOR_STATS=n CONFIG_BOOT_IMAGE_ACCESS_HOOKS=y CONFIG_UPDATEABLE_IMAGE_NUMBER=2 CONFIG_BOOT_UPGRADE_ONLY=y # *snip* CONFIG_PM_PARTITION_SIZE_MCUBOOT=0x14000 CONFIG_MAIN_STACK_SIZE=10304 CONFIG_BOOT_MAX_IMG_SECTORS=256
My application has the following configuration:
CONFIG_MCUMGR_CMD_OS_MGMT=y CONFIG_MCUMGR_CMD_IMG_MGMT=y CONFIG_MCUMGR_SMP_BT=y CONFIG_MCUMGR=y CONFIG_BOOTLOADER_MCUBOOT=y CONFIG_MCUMGR_SMP_BT_AUTHEN=n CONFIG_PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY=y CONFIG_MCUMGR_MGMT_NOTIFICATION_HOOKS=y CONFIG_NRF53_UPGRADE_NETWORK_CORE=y CONFIG_MCUMGR_SMP_BT_CONN_PARAM_CONTROL=y CONFIG_MCUMGR_SMP_REASSEMBLY_BT=y # *snip* CONFIG_MEMFAULT=y CONFIG_NEWLIB_LIBC=y CONFIG_BT=y # *snip*
I have successfully updated the application firmware using this command:
mcumgr image upload -c dev0 .\build\zephyr\app_update.bin
I am trying to use this command (from Nordic's docs) to update the network core:
mcumgr image upload -c dev0 -n 3 .\build\zephyr\net_core_app_update.bin
Here is the output of mcumgr image list:
Images:
image=0 slot=0
version: 3.9.2.0
bootable: false
flags:
hash: Unavailable
image=1 slot=0
version: 0.0.0.0
bootable: false
flags:
hash: Unavailable
Split status: N/A (0)
When I run this command, mcumgr's progress bar sits at 0% forever.
How do I make the network core DFU work?
Side note: yesterday, I was trying to make it work without the CONFIG_NRF32_MULTI_IMAGE_UPDATE enabled. the mcumgr command succeeded, but then the network core bootloader was failing - you can find my findings here.
