MCUMGR is stuck after a flash of a big image

[saoron]

Hi, 

If the image we falshed using mcumgr is 90% of the allowed image size mcumgr flashes the unit without a problem, If the image is 98% the proccess seems stuck.

This is the image list:

root@tina:~# mcumgr --conntype serial --connstring /dev/ttyS4,baud=115200 image 
 list
Images:
 image=0 slot=0
    version: 0.0.0
    bootable: true
    flags: active confirmed
    hash: feb4706e9a332137daf3016bd2c810885ac4139d67e2242b0f2d4cceda1c7b0e
 image=0 slot=1
    version: 0.0.0
    bootable: true
    flags: pending permanent
    hash: 2c8963914df5985f7141b5c1525ac8f1ebefd332d12e4dda9d0ea770634fc473
Split status: N/A (0)

image erase is not working as well and will return Error: 6.

How can we remove the 2nd image and flash the unit again?

Your help would be greatly appreciated, 

[saoron]

thanks

[saoron]

HI Vidar Berg , coming back to this thread..

In our prj.conf we have:

CONFIG_BOOTLOADER_MCUBOOT=y 

Can you please elaborate on what did you mean "serial recovery"

[Vidar Berg]

Hi,

"serial recovery" is when you have a serial DFU transport (USB or UART) enabled in the bootloader itself. This allows DFU to be performed within the bootloader. 

https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/topic/exercise-1-dfu-over-uart/ 

[saoron]

Thanks, Here's our prj.conf, anything else we can do?

# Enable mcumgr.
CONFIG_MCUMGR=y

# Enable most core commands.
CONFIG_MCUMGR_CMD_IMG_MGMT=y
CONFIG_MCUMGR_CMD_OS_MGMT=y

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

# Enable the serial mcumgr transport.
CONFIG_MCUMGR_SMP_UART=y
CONFIG_NET_BUF_USER_DATA_SIZE=7

# Disable UART Console and enable the RTT console
CONFIG_UART_MCUMGR=y

CONFIG_UART_CONSOLE_MCUMGR=y

CONFIG_NFCT_PINS_AS_GPIOS=y

CONFIG_CONSOLE_SUBSYS=y
CONFIG_CONSOLE_GETLINE=y

# Add support for temperature sensor
CONFIG_NRFX_TEMP=y

#For analog read:
CONFIG_ADC=y

# BT configuration 
CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_APPEARANCE=833
CONFIG_BT_DEVICE_NAME_DYNAMIC=y
CONFIG_BT_DEVICE_NAME_MAX=128
CONFIG_BT_BROADCASTER=y
CONFIG_BT_OBSERVER=y
CONFIG_BT_DEBUG_LOG=n


CONFIG_BT_BUF_ACL_RX_SIZE=251
CONFIG_BT_BUF_ACL_TX_SIZE=251
CONFIG_BT_L2CAP_TX_MTU=247
CONFIG_BT_CTLR_DATA_LENGTH_MAX=251

CONFIG_BT_CTLR_TX_PWR_PLUS_8=y

#CONFIG_LOG=y

# CONFIG_LOG_BUFFER_SIZE=1024
CONFIG_BT_CENTRAL=y
CONFIG_BT_GATT_CLIENT=y
# CONFIG_BT_NUS=y
CONFIG_BT_GATT_DM=y
# CONFIG_BT_SMP=y
# CONFIG_BT_SIGNING=y
# CONFIG_BT_DIS=n
# CONFIG_BT_ATT_PREPARE_COUNT=5
# CONFIG_BT_BAS=n
# CONFIG_BT_HRS=n
# CONFIG_BT_PRIVACY=y
# CONFIG_BT_KEYS_OVERWRITE_OLDEST=y
# todo: this have conflicts with the settings 
#CONFIG_BT_SETTINGS=y

CONFIG_BT_DEBUG_NONE=y
CONFIG_BT_ASSERT=n
CONFIG_BT_DATA_LEN_UPDATE=n
CONFIG_BT_PHY_UPDATE=n
CONFIG_BT_GATT_CACHING=n
CONFIG_BT_GATT_SERVICE_CHANGED=n
CONFIG_BT_GAP_PERIPHERAL_PREF_PARAMS=n
CONFIG_BT_SETTINGS_CCC_LAZY_LOADING=y
CONFIG_BT_HCI_VS_EXT=n


# CONFIG_SETTINGS=y
# CONFIG_SETTINGS_RUNTIME=y

# CONFIG_FLASH=y
# CONFIG_FLASH_PAGE_LAYOUT=y
# CONFIG_FLASH_MAP=y
# CONFIG_NVS=y

#CONFIG_NEWLIB_LIBC=y

# CONFIG_CBPRINTF_NANO=y
# CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y

CONFIG_HEAP_MEM_POOL_SIZE=2048
CONFIG_MAIN_STACK_SIZE=1024

CONFIG_POSIX_API=y

CONFIG_BT_GATT_DM_MAX_ATTRS=50

[Vidar Berg]

Serial recovery is something that must be enabled in the MCUBoot child-image. Please refer to the link in my previous comment for details.