Image swap with MCUmgr does not work, after reset device end up in endless loop

[Daver]

Hello i have an issue that i created boot and booted the thingy53 nrf5340 with smp svr example with west. So far everything went smoothly. Then i tried to create similar build and upload signed.bin via mcumgr image upload
mcumgr --conntype serial --connstring "COM7,baud=115200" image upload C:\ncs\v2.5.2\zephyr\samples\subsys\mgmt\mcumgr\smp_svr\build_console\zephyr\zephyr.signed.bin
124.17 KiB / 124.17 KiB

then i tested the image and reset the device.

Images:
image=0 slot=0
version: 0.0.0
bootable: true
flags: active confirmed
hash: c242c2c20cb8b6fa7b82f659c9d7ca9d8700725b1b0a9102d5eccd0e415943ab
image=0 slot=1
version: 0.0.0
bootable: true
flags: pending
hash: 2ed62aac00265647c8343286dcc410a59ed8b83a5fffab103f54abedca21a5b6
Split status: N/A (0)

after that device does not communicate and after debug i discovered it got stuck in endless halt with reason 35.

If anyone have some ideas what can cause this problem i would really appreciate help

[frax84]

Hi,

did you confirm the image? You said that you tested the image and then reset, so i suppose you did something like this:

mcumgr -c acm0 image test <HASH>

mcumgr -c acm0 reset

NOTE: acm0 is the connection profile you're using, created coherently with the procedure indicated HERE in the docs.

After this commands you should confirm the image:

mcumgr -c acm0 image confirm <HASH>

[Daver]

Yes i did exactly that but the problem is i lost communication after reset and could not confirm the image. My serial communication runs on com 7 but after reset it does not show any device on com 7
In debuger i end up in: 

FUNC_NORETURN __weak void arch_system_halt(unsigned int reason)

{

    ARG_UNUSED(reason);

    /* TODO: What's the best way to totally halt the system if SMP

     * is enabled?

     */

    (void)arch_irq_lock();

    for (;;) {

        /* Spin endlessly */

    }

}

[frax84]

Can you share your proj.conf and mcuboot.conf configuration settings?

[Daver]

prj.conf

# Enable MCUmgr and dependencies.
CONFIG_NET_BUF=y
CONFIG_ZCBOR=y
CONFIG_CRC=y
CONFIG_MCUMGR=y
CONFIG_STREAM_FLASH=y
CONFIG_FLASH_MAP=y

# Some command handlers require a large stack.
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2304
CONFIG_MAIN_STACK_SIZE=2048

# Ensure an MCUboot-compatible binary is generated.
CONFIG_BOOTLOADER_MCUBOOT=y

# Enable flash operations.
CONFIG_FLASH=y

# Required by the `taskstat` command.
CONFIG_THREAD_MONITOR=y

# Support for taskstat command
CONFIG_MCUMGR_GRP_OS_TASKSTAT=y

# Enable statistics and statistic names.
CONFIG_STATS=y
CONFIG_STATS_NAMES=y

# Enable most core commands.
CONFIG_FLASH=y
CONFIG_IMG_MANAGER=y
CONFIG_MCUMGR_GRP_IMG=y
CONFIG_MCUMGR_GRP_OS=y
CONFIG_MCUMGR_GRP_STAT=y

# Enable logging
CONFIG_LOG=y
CONFIG_MCUBOOT_UTIL_LOG_LEVEL_WRN=y

# Disable debug logging
CONFIG_LOG_MAX_LEVEL=3

overlay-shell.conf

# Enable the shell MCUmgr transport.
CONFIG_BASE64=y
CONFIG_SHELL=y
CONFIG_SHELL_BACKEND_SERIAL=y
CONFIG_MCUMGR_TRANSPORT_SHELL=y

# mcumgr-cli application doesn't accepts log in the channel it uses
CONFIG_SHELL_LOG_BACKEND=n

custom-edit.conf

CONFIG_USE_SEGGER_RTT=y
#CONFIG_LOG_BACKEND_RTT=y
CONFIG_BOOTLOADER_MCUBOOT=y


CONFIG_LOG_MODE_DEFERRED=y
CONFIG_LOG_RUNTIME_FILTERING=y
CONFIG_LOG_BUFFER_SIZE=2048
CONFIG_LOG_PRINTK=y
CONFIG_LOG_PROCESS_TRIGGER_THRESHOLD=0
CONFIG_LOG_TAG_MAX_LEN=8
CONFIG_MCUBOOT_UTIL_LOG_LEVEL_DBG=y
# Disable debug logging
#CONFIG_LOG_MAX_LEVEL=3
#UART LOGGING
CONFIG_LOG_BACKEND_UART=y

CONFIG_LOG_MAX_LEVEL=4
CONFIG_LOG_DEFAULT_LEVEL=3

[frax84]

I don't see anything evidently wrong in these settings. Moreover, imho, this part has not super clear docs to work with, but i would start from these to debug your issue

[Daver]

I resolved the issue i dug down into the problem. It was in signing the image as i used:

# I used "--header-size 32 --pad-header" becase --> "error header size was not specified"
# The error suggested using specified 32 size header

west sign -t imgtool -- --key C:\ncs\v2.5.2\bootloader\mcuboot\root-rsa-2048.pem  --header-size 32 --pad-header

The problem was that image generated before sign had 512 header so after adjusting command as shown

west sign -t imgtool -- --key C:\ncs\v2.5.2\bootloader\mcuboot\root-rsa-2048.pem  --header-size 512 --pad-header

i was able to update firmware via MCUmgr and serial communication
also minor changes i used these config files: 

-DEXTRA_CONF_FILE='overlay-serial.conf;overlay-fs.conf;overlay-shell-mgmt.conf'