Trouble viewing hard faults

[esisk]

I'm trying to view core dumps on Memfault's web app, and having trouble doing so. I can't even see hard faults being logged even though I know they're occurring (forcing stack overflow, dereferincing NULL pointer). I was wondering if there's something I've enabled in my prj.conf that's preventing this? My set up is NCS v1.7.0 on a custom board with a nRF9160. Here's my prj.conf

##################
# General config #
##################

CONFIG_APP_VERSION="1.0.10test"
CONFIG_REBOOT=y
# Reboot on Error (Change this to 'n' when debugging lockups etc.)
CONFIG_RESET_ON_FATAL_ERROR=y
CONFIG_ASSERT=n
CONFIG_BT_ASSERT=n
# CJSON
CONFIG_CJSON_LIB=y
# Base 64 library (use to compress thingname)
CONFIG_BASE64=y
# NEWLIB C
CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
# Date Time library
CONFIG_DATE_TIME=y
CONFIG_DATE_TIME_NTP=y
CONFIG_DATE_TIME_UPDATE_INTERVAL_SECONDS=0
# Thread Debugging
CONFIG_THREAD_NAME=y
CONFIG_THREAD_ANALYZER=n
# Heap and stacks
CONFIG_HEAP_MEM_POOL_SIZE=8192
CONFIG_MAIN_STACK_SIZE=4096
CONFIG_MAIN_THREAD_PRIORITY=0
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
# MCUBOOT
CONFIG_BOOTLOADER_MCUBOOT=y
CONFIG_MCUBOOT_IMG_MANAGER=y
# Image manager
CONFIG_IMG_MANAGER=y
CONFIG_FLASH=y
CONFIG_IMG_ERASE_PROGRESSIVELY=y
CONFIG_DEVICE_POWER_MANAGEMENT=y
CONFIG_DEBUG=n

# if debugging
# CONFIG_DEBUG_OPTIMIZATIONS=y
# CONFIG_DEBUG_THREAD_INFO=y

###############
# Peripherals #
###############

# Watchdog
CONFIG_WATCHDOG=y
# 15 seconds
CONFIG_WDT_MAX_TIMEOUT_MS=30000
# I2C Config
CONFIG_I2C=y
# PWM
CONFIG_PWM=y
# GPIO
CONFIG_GPIO=y
CONFIG_GPIO_NRFX=y
CONFIG_GPIO_NRF_P0=y

# UART
CONFIG_UART_INTERRUPT_DRIVEN=y

#######################
# Networking over LTE #
#######################

# Network
CONFIG_NETWORKING=y
CONFIG_NET_NATIVE=n
CONFIG_NET_SOCKETS=y
CONFIG_NET_SOCKETS_OFFLOAD=y

# LTE link control
CONFIG_LTE_LINK_CONTROL=y
CONFIG_LTE_LOCK_BANDS=y
CONFIG_LTE_LOCK_BAND_MASK="1000000001000"
CONFIG_LTE_AUTO_INIT_AND_CONNECT=n
CONFIG_LTE_NETWORK_TIMEOUT=600
CONFIG_LTE_NETWORK_MODE_LTE_M=y
CONFIG_LTE_EDRX_REQ=y
CONFIG_LTE_EDRX_REQ_VALUE_LTE_M="0111"
CONFIG_LTE_PTW_VALUE_LTE_M="0100"
CONFIG_LTE_PSM_REQ_RAT="111"
CONFIG_LTE_PSM_REQ_RPTAU="111"

# NRF Modem Library
CONFIG_NRF_MODEM_LIB=y
CONFIG_NRF_MODEM_LIB_SYS_INIT=n
# Certificate Loading
CONFIG_MODEM_KEY_MGMT=y
CONFIG_PROVISION_CERTIFICATES=n
# Modem information
CONFIG_MODEM_INFO=y
CONFIG_NRF_MODEM_LIB_HEAP_SIZE=2048
CONFIG_POSIX_MAX_FDS=8
# needed to run trace collector
CONFIG_NRF_MODEM_LIB_TRACE_ENABLED=n
# AGPS uses SUPL
CONFIG_SUPL_CLIENT_LIB=y

# AWS IoT library
# Access to AWS library
CONFIG_SLATE_AWS_IOT=y
# Name of broker
CONFIG_AWS_IOT_BROKER_HOST_NAME="iot.dev.slatesafety.com"
# Sec tag for IOT Core certificates
CONFIG_AWS_IOT_SEC_TAG=12345678
# subscribe to update delta topic
CONFIG_AWS_IOT_TOPIC_GET_ACCEPTED_SUBSCRIBE=y
CONFIG_AWS_IOT_TOPIC_UPDATE_DELTA_SUBSCRIBE=y
CONFIG_AWS_IOT_AUTO_DEVICE_SHADOW_REQUEST=n
# connect using connection poll
CONFIG_AWS_IOT_CONNECTION_POLL_THREAD=y
# define client id (thingname) at runtime
CONFIG_AWS_IOT_CLIENT_ID_APP=y
CONFIG_AWS_IOT_MQTT_RX_TX_BUFFER_LEN=3000
CONFIG_AWS_IOT_MQTT_PAYLOAD_BUFFER_LEN=3000
CONFIG_AWS_IOT_SEND_TIMEOUT=y
CONFIG_AWS_IOT_SEND_TIMEOUT_SEC=10
CONFIG_AWS_IOT_APP_SUBSCRIPTION_LIST_COUNT=1
# access to AWS Jobs library
CONFIG_AWS_JOBS=n

# not using a persistent connection
CONFIG_MQTT_CLEAN_SESSION=y
# session will be kept alive for 400 seconds
CONFIG_MQTT_KEEPALIVE=400
# application topics device will be posting to
CONFIG_BIOMETRICS_TOPIC_PREFIX="/b"
CONFIG_ALERTS_TOPIC_PREFIX="/a"
CONFIG_GPS_TOPIC_PREFIX="/g"
CONFIG_STATUS_TOPIC_PREFIX="/s"
CONFIG_R2W_TOPIC_PREFIX="/r"

# FOTAs
# access to library
CONFIG_DOWNLOAD_CLIENT=y
CONFIG_DOWNLOAD_CLIENT_STACK_SIZE=4096
# access to DFU library, used once file has been downloaded
CONFIG_DFU_TARGET=y
CONFIG_DFU_TARGET_MCUBOOT=y
CONFIG_DFU_TARGET_MODEM_DELTA=y
# library to easily perform FOTA for nRF9160 and modem
# CONFIG_FOTA_DOWNLOAD=y
# CONFIG_FOTA_DOWNLOAD_PROGRESS_EVT=y
CONFIG_DOWNLOAD_CLIENT_RANGE_REQUESTS=n
CONFIG_DOWNLOAD_CLIENT_MAX_FILENAME_SIZE=1024
CONFIG_DOWNLOAD_CLIENT_MAX_HOSTNAME_SIZE=256
CONFIG_DOWNLOAD_CLIENT_BUF_SIZE=2500

### LWM2M REQUIREMENTS ###
CONFIG_LWM2M_CARRIER=y
CONFIG_LWM2M_CARRIER_CERTIFICATION_MODE=n
# LwM2M carrier is only compiled for hard-float
CONFIG_FPU=y
CONFIG_FP_HARDABI=y
# Disable NB-IoT fallback
CONFIG_LTE_NETWORK_USE_FALLBACK=n
# PDN library
CONFIG_PDN=y
CONFIG_PDN_CONTEXTS_MAX=3
# SMS library
CONFIG_SMS=y

CONFIG_AT_CMD_THREAD_STACK_SIZE=2048
CONFIG_AT_MONITOR=y

#### END NETWORKING ####

#############
# Bluetooth #
#############

# Enable Bluetooth
CONFIG_BT=y
# Used for HCI over UART
CONFIG_BT_H4=y
# Used for initiating connections
# and scanning for advertisements (Beacons)
CONFIG_BT_CENTRAL=y
CONFIG_BT_SCAN=y
CONFIG_BT_SCAN_FILTER_ENABLE=y
CONFIG_BT_SCAN_UUID_CNT=1
# Used for advertising data to gateways
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_EXT_ADV=y
CONFIG_BT_EXT_ADV_MAX_ADV_SET=3
# Used if connecting (might)
CONFIG_BT_GATT_CLIENT=y
CONFIG_BT_GATT_DM=y
# Security
CONFIG_BT_SMP=y
CONFIG_BT_PRIVACY=y
CONFIG_BT_TINYCRYPT_ECC=y
CONFIG_BT_DEBUG_LOG=n
# Increases Data Throughput
CONFIG_BT_BUF_ACL_RX_SIZE=100
CONFIG_BT_BUF_ACL_TX_SIZE=100
CONFIG_BT_L2CAP_TX_MTU=96
CONFIG_BT_USER_DATA_LEN_UPDATE=y
CONFIG_BT_ATT_PREPARE_COUNT=2
CONFIG_BT_USER_PHY_UPDATE=y
# Enable bonding
CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y

############################################
# Cryptography (Used to transmit over BLE) #
############################################
# Enable nordic security backend and PSA APIs
CONFIG_MBEDTLS_LIBRARY_NRF_SECURITY=y
CONFIG_NORDIC_SECURITY_BACKEND=y
CONFIG_MBEDTLS_PSA_CRYPTO_C=y

CONFIG_MBEDTLS_ENABLE_HEAP=y
CONFIG_MBEDTLS_SSL_MAX_CONTENT_LEN=4096
CONFIG_MBEDTLS_HEAP_SIZE=8192

# Enable persistent storage APIs
CONFIG_MBEDTLS_PSA_CRYPTO_STORAGE_C=y
CONFIG_PSA_NATIVE_ITS=y

CONFIG_MBEDTLS_CCM_C=n
CONFIG_MBEDTLS_CHACHA20_C=n
CONFIG_MBEDTLS_POLY1305_C=n
CONFIG_MBEDTLS_SHA1_C=n
CONFIG_MBEDTLS_SHA512_C=n
CONFIG_MBEDTLS_TLS_LIBRARY=n
CONFIG_MBEDTLS_X509_LIBRARY=n
CONFIG_MBEDTLS_DHM_C=n
CONFIG_MBEDTLS_ECP_C=n
CONFIG_MBEDTLS_HMAC_DRBG_C=n
CONFIG_MBEDTLS_ECDSA_DETERMINISTIC=n
CONFIG_MBEDTLS_ECP_DP_SECP256R1_ENABLED=n
CONFIG_MBEDTLS_SSL_CLI_C=n
CONFIG_MBEDTLS_SSL_SRV_C=n
CONFIG_MBEDTLS_RSA_C=n

###########
# Logging #
###########

# Enable Logging
# Segger RTT
# CONFIG_PRINTK=n
CONFIG_LOG_PRINTK=n
# CONFIG_UART_CONSOLE=y
# CONFIG_LOG_BACKEND_UART=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_UART_CONSOLE=n
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_SPEED=y
CONFIG_LOG_BACKEND_SHOW_COLOR=n

# CONFIG_MAIN_THREAD_PRIORITY=-1


CONFIG_LOG=y
CONFIG_LOG_MODE_IMMEDIATE=y
# BLE
CONFIG_BANDV2_BLE_LOG_LEVEL_DBG=y
# Data
CONFIG_NOTIFICATIONS_LOG_LEVEL_DBG=y
CONFIG_BIOMETRICS_LOG_LEVEL_DBG=y
CONFIG_GNSS_LOG_LEVEL_DBG=y
# LTE
CONFIG_IOT_LOG_LEVEL_DBG=y
# Jobs
CONFIG_JOBS_LOG_LEVEL_DBG=y
# Peripherals
CONFIG_ACCELEROMETER_LOG_LEVEL_DBG=y
CONFIG_BODY_SENSOR_LOG_LEVEL_DBG=y
CONFIG_CLOCK_LOG_LEVEL_DBG=y
CONFIG_EXT_FLASH_STORAGE_LOG_LEVEL_DBG=y
CONFIG_FUEL_GAUGE_LOG_LEVEL_DBG=y
CONFIG_LEDS_LOG_LEVEL_DBG=y
CONFIG_MOTOR_LOG_LEVEL_DBG=y
CONFIG_UART_COMMS_LOG_LEVEL_DBG=y
CONFIG_VALENCELL_LOG_LEVEL_DBG=y
CONFIG_APP_WATCHDOG_LOG_LEVEL_DBG=y
CONFIG_FOTA_LOG_LEVEL_DBG=y
# NCS Modules
CONFIG_DOWNLOAD_CLIENT_LOG_LEVEL_ERR=y
CONFIG_DATE_TIME_LOG_LEVEL_ERR=y
CONFIG_AT_CMD_LOG_LEVEL_ERR=y
CONFIG_SLATE_AWS_IOT_LOG_LEVEL_ERR=y
CONFIG_BT_GATT_DM_LOG_LEVEL_OFF=y
CONFIG_BT_SCAN_LOG_LEVEL_OFF=y
CONFIG_DFU_TARGET_LOG_LEVEL_ERR=y
CONFIG_MPSL_CX_LOG_LEVEL_OFF=y
CONFIG_MPSL_FEM_LOG_LEVEL_OFF=y
CONFIG_MGMT_FMFU_LOG_LEVEL_OFF=y
CONFIG_AGPS_LOG_LEVEL_OFF=y
CONFIG_LWM2M_CARRIER_LOG_LEVEL_OFF=y
CONFIG_NRF_MODEM_LIB_LOG_LEVEL_ERR=y
CONFIG_AT_MONITOR_LOG_LEVEL_OFF=y
CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_INF=y
CONFIG_AT_NOTIF_LOG_LEVEL_OFF=y
CONFIG_PDN_LOG_LEVEL_OFF=y
CONFIG_FATAL_ERROR_LOG_LEVEL_ERR=y
CONFIG_SMS_LOG_LEVEL_OFF=y
CONFIG_MODEM_KEY_MGMT_LOG_LEVEL_INF=y
CONFIG_PSA_EITS_BACKEND_ZEPHYR_LOG_LEVEL_OFF=y
CONFIG_MCUBOOT_UTIL_LOG_LEVEL_OFF=y
CONFIG_SOC_LOG_LEVEL_OFF=y
CONFIG_ARCH_LOG_LEVEL_ERR=y
CONFIG_MPU_LOG_LEVEL_ERR=y
CONFIG_KERNEL_LOG_LEVEL_ERR=y
CONFIG_GPIO_LOG_LEVEL_OFF=y
CONFIG_I2C_LOG_LEVEL_ERR=y
CONFIG_PWM_LOG_LEVEL_ERR=y
CONFIG_WDT_LOG_LEVEL_ERR=y
CONFIG_CLOCK_CONTROL_LOG_LEVEL_OFF=y
CONFIG_BT_LOG_LEVEL_OFF=y
# CONFIG_NVS_LOG_LEVEL_ERR=n
CONFIG_NVS_LOG_LEVEL_OFF=y
CONFIG_NET_BUF_LOG_LEVEL_OFF=y
CONFIG_PM_LOG_LEVEL_ERR=y
CONFIG_IMG_MANAGER_LOG_LEVEL_OFF=y
CONFIG_STREAM_FLASH_LOG_LEVEL_OFF=y
CONFIG_SETTINGS_LOG_LEVEL_OFF=y
# CONFIG_NET_LOG=y
# CONFIG_MQTT_LOG_LEVEL_DBG=y

# Remote Debugging
CONFIG_MEMFAULT=y
CONFIG_MEMFAULT_NCS_PROJECT_KEY="<placeholder>"
CONFIG_MEMFAULT_SHELL=y
CONFIG_MEMFAULT_NRF_SHELL=y
CONFIG_MEMFAULT_NCS_LTE_METRICS=y
CONFIG_MEMFAULT_NCS_DEVICE_ID_IMEI=n
CONFIG_MEMFAULT_NCS_DEVICE_ID_RUNTIME=y
CONFIG_MEMFAULT_NCS_FW_TYPE="cell-fw"
CONFIG_MEMFAULT_NCS_FW_VERSION_STATIC=y
CONFIG_MEMFAULT_NCS_FW_VERSION="1.0.10"
CONFIG_MEMFAULT_NCS_HW_VERSION="Echo"
CONFIG_MEMFAULT_NCS_STACK_METRICS=y
CONFIG_MEMFAULT_NCS_LOG_LEVEL_OFF=y
# CONFIG_MEMFAULT_SOFTWARE_WATCHDOG_TIMEOUT_SECS=30
CONFIG_MEMFAULT_NCS_INTERNAL_FLASH_BACKED_COREDUMP=y
CONFIG_MEMFAULT_COREDUMP_COLLECT_BSS_REGIONS=y
CONFIG_PM_PARTITION_SIZE_MEMFAULT_STORAGE=0x32000
CONFIG_MEMFAULT_HTTP_ENABLE=n
CONFIG_MEMFAULT_NCS_PROVISION_CERTIFICATES=n
CONFIG_SHELL=y

# CONFIG_MEMFAULT_LOGGING_ENABLE=y
# CONFIG_MEMFAULT_LOGGING_RAM_SIZE=2048

[esisk]

I ended up figuring it out. After some help from Memfault support, I got pointed in the right direction

"Ah, as far as the weird behavior around coredump capture, you've unfortunately run into a bug that's been since fixed in the Memfault SDK. You'll have to update the Memfault SDK module, here's some instructions:
https://docs.memfault.com/docs/mcu/nrf-connect-sdk-guide/#updating-the-memfault-sdk

The fix was made in v0.30.1 of the Memfault SDK:
https://github.com/memfault/memfault-firmware-sdk/blob/36a634536d2cd3c455545f0b97c926275772153c/CHANGES.md#changes-between-memfault-sdk-0301-and-sdk-0300---april-6-2022"

So if you're having the same issue, follow the steps there.

Also, another extremely nuanced error that I experienced once I fixed that. The coredump was getting generated and saved successfully to the 9160's internal flash; however, upon reboot, the LWM2M library was exhibiting undefined behavior when connecting to the network (i.e. LWM2M_EVENT_BOOTSTRAPPED then LWM2M_EVENT_DISCONNECTED over and over). I remembered a limitation of the library listed here Requirements and application limitations — nRF Connect SDK 1.7.0 documentation (nordicsemi.com). Specifically,

"The LwM2M carrier library uses the following NVS record key range: 0xCA00 - 0xCAFF. This range must not be used by the application."

After looking at partitions.yml and lwm2m_os.c, I could see that the partition generated for the coredump was in the same range as the storage partition listed in my board file, and lwm2m_os.c was using the storage partition for its file system. I'm a little confused as to why LWM2M is using this old partition from the board file, since I was under the impression that those definitions were deprecated in favor of the partition manager. Anyway, sure it's just a remnant of transitioning. Hope this helps someone else.

Edit: It'd also be nice if you could help me configure this partition file since it is a challenge. I actually discovered that the Settings storage is configured to go over the LWM2M partition as well which could lead to some weird behavior. Here's my dynamic partition file. I already have a static configuration file for my external flash but need a little help altering the primary flash partitions.

alerts:
  address: 0x2fc000
  device: MX25L3
  end_address: 0x31c000
  placement:
    after:
    - biometrics
  region: external_flash
  size: 0x20000
app:
  address: 0x1c200
  end_address: 0xee000
  region: flash_primary
  size: 0xd1e00
biometrics:
  address: 0xfc000
  device: MX25L3
  end_address: 0x2fc000
  placement:
    after:
    - indices
  region: external_flash
  size: 0x200000
external_flash:
  address: 0x400000
  end_address: 0x400000
  region: external_flash
  size: 0x0
gps:
  address: 0x31c000
  device: MX25L3
  end_address: 0x350000
  placement:
    after:
    - alerts
  region: external_flash
  size: 0x34000
indices:
  address: 0xf2000
  device: MX25L3
  end_address: 0xfc000
  placement:
    after:
    - mcuboot_secondary
  region: external_flash
  size: 0xa000
logging:
  address: 0x3a1000
  device: MX25L3
  end_address: 0x3b0000
  placement:
    after:
    - r2ws
  region: external_flash
  size: 0xf000
mcuboot:
  address: 0x0
  end_address: 0xc000
  placement:
    before:
    - mcuboot_primary
  region: flash_primary
  size: 0xc000
mcuboot_pad:
  address: 0xc000
  end_address: 0xc200
  placement:
    before:
    - mcuboot_primary_app
  region: flash_primary
  size: 0x200
mcuboot_primary:
  address: 0xc000
  end_address: 0xee000
  orig_span: &id001
  - spm
  - app
  - mcuboot_pad
  region: flash_primary
  size: 0xe2000
  span: *id001
mcuboot_primary_app:
  address: 0xc200
  end_address: 0xee000
  orig_span: &id002
  - app
  - spm
  region: flash_primary
  size: 0xe1e00
  span: *id002
mcuboot_secondary:
  address: 0x0
  device: MX25L3
  end_address: 0xf2000
  placement:
    align:
      start: 0x0
  region: external_flash
  size: 0xf2000
memfault_storage:
  address: 0xee000
  align:
    start: 0x1000
  end_address: 0xfe000
  placement:
    before:
    - settings_storage
  region: flash_primary
  size: 0x10000
nrf_modem_lib_ctrl:
  address: 0x20010000
  end_address: 0x200104e8
  inside:
  - sram_nonsecure
  placement:
    after:
    - spm_sram
    - start
  region: sram_primary
  size: 0x4e8
nrf_modem_lib_rx:
  address: 0x200124e8
  end_address: 0x200144e8
  inside:
  - sram_nonsecure
  placement:
    after:
    - nrf_modem_lib_tx
  region: sram_primary
  size: 0x2000
nrf_modem_lib_sram:
  address: 0x20010000
  end_address: 0x200144e8
  orig_span: &id003
  - nrf_modem_lib_ctrl
  - nrf_modem_lib_tx
  - nrf_modem_lib_rx
  region: sram_primary
  size: 0x44e8
  span: *id003
nrf_modem_lib_tx:
  address: 0x200104e8
  end_address: 0x200124e8
  inside:
  - sram_nonsecure
  placement:
    after:
    - nrf_modem_lib_ctrl
  region: sram_primary
  size: 0x2000
otp:
  address: 0xff8108
  end_address: 0xff83fc
  region: otp
  size: 0x2f4
r2ws:
  address: 0x360000
  device: MX25L3
  end_address: 0x3a1000
  placement:
    after:
    - statuses
  region: external_flash
  size: 0x41000
settings_storage:
  address: 0xfe000
  end_address: 0x100000
  placement:
    before:
    - end
  region: flash_primary
  size: 0x2000
spm:
  address: 0xc200
  end_address: 0x1c200
  inside:
  - mcuboot_primary_app
  placement:
    before:
    - app
  region: flash_primary
  size: 0x10000
spm_sram:
  address: 0x20000000
  end_address: 0x20010000
  inside:
  - sram_secure
  placement:
    after:
    - start
  region: sram_primary
  size: 0x10000
sram_nonsecure:
  address: 0x20010000
  end_address: 0x20040000
  orig_span: &id004
  - sram_primary
  - nrf_modem_lib_ctrl
  - nrf_modem_lib_tx
  - nrf_modem_lib_rx
  region: sram_primary
  size: 0x30000
  span: *id004
sram_primary:
  address: 0x200144e8
  end_address: 0x20040000
  region: sram_primary
  size: 0x2bb18
sram_secure:
  address: 0x20000000
  end_address: 0x20010000
  orig_span: &id005
  - spm_sram
  region: sram_primary
  size: 0x10000
  span: *id005
statuses:
  address: 0x350000
  device: MX25L3
  end_address: 0x360000
  placement:
    after:
    - gps
  region: external_flash
  size: 0x10000
unused:
  address: 0x3b0000
  device: MX25L3
  end_address: 0x400000
  placement:
    after:
    - logging
  region: external_flash
  size: 0x50000

[Didrik Rokhaug]

Hi, and sorry for the late reply.

First, it is good to hear that you managed to solve your original problem.

Your new problem is as you say caused by the carrier_lib not using the Partition Manager. This has been changed in version 0.30.0.

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/libraries/bin/lwm2m_carrier/CHANGELOG.html#liblwm2m-carrier-0-30-0

In the changelog, it is also explained how you can make the Partition Manager partition match the device tree partition:

To use the legacy NVS partition, you can add a pm_static.yml file to your project with the following content:

lwm2m_carrier:
  address: 0xfa000
  size: 0x3000
free:
  address: 0xfd000
  size: 0x3000

Best regards,

Didrik

[esisk]

I've been having trouble updating devices via FOTAs due to the partitions already in place on those devices. I can probably figure out how to swing this. Is there a way to update the carrier lib without updating the version of NCS that I'm using? Also, I know there's a compatibility matrix for what MFW is approved by various carriers, but is there a compatibility matrix for what version of NCS works with which version of the MFW? It'd be great to upgrade from 1.7.0 to 2.x.x. We got our devices certified by Verizon on MFW v1.3.0

[Didrik Rokhaug]

These settings should work for the flash_primary region:

mcuboot:
    address: 0x0
    end_address: 0xc000
    placement:
      before:
      - mcuboot_primary
    region: flash_primary
    size: 0xc000
mcuboot_primary:
  address: 0xc000
  end_address: 0xee000
  orig_span: &id001
  - spm
  - app
  - mcuboot_pad
  region: flash_primary
  size: 0xe2000
  span: *id001
mcuboot_pad:
  address: 0xc000
  end_address: 0xc200
  placement:
    before:
    - mcuboot_primary_app
  region: flash_primary
  size: 0x200
mcuboot_primary_app:
  address: 0xc200
  end_address: 0xee000
  orig_span: &id002
  - app
  - spm
  region: flash_primary
  size: 0xe1e00
  span: *id002
spm:
  address: 0xc200
  end_address: 0x1c200
  inside:
  - mcuboot_primary_app
  placement:
    before:
    - app
  region: flash_primary
  size: 0x10000
app:
  address: 0x1c200
  end_address: 0xee000
  region: flash_primary
  size: 0xd1e00
memfault_storage:
  address: 0xee000
  align:
    start: 0x1000
  end_address: 0xfa000
  placement:
    before:
    - settings_storage
  region: flash_primary
  size: 0xc000
lwm2m_carrier:
  address: 0xfa000
  size: 0x3000
settings_storage:
    address: 0xfe000
    end_address: 0x100000
    placement:
      before:
      - end
    region: flash_primary
    size: 0x2000

(note that I have not been able to actually test them myself)

I had to shrink the memfault_storage partition to make room for the lwm2m_carrier partition. To make sure that the Memfault library uses the new size, you should probably also set CONFIG_PM_PARTITION_SIZE_MEMFAULT_STORAGE=0xc000 in your prj.conf. Shrinking the partition should not cause any problems, bu you might get less coredump data sent to memfault. You can avoid that by storing the coredump in no init RAM instead, similar to how it is done in this commit: https://github.com/simensrostad/fw-nrfconnect-nrf/commit/a366a615b16d93a961b94e9aec3873036d38c61e#

esisk said:

is there a compatibility matrix for what version of NCS works with which version of the MFW?

This matrix shows which NCS version the various modem FW versions have been tested with: https://infocenter.nordicsemi.com/topic/comp_matrix_nrf9160/COMP/nrf9160/nrf9160_modem_fw.html

However, when dealing with carrier certifications (and especially Verizon), you have to use the combinations listed here: https://infocenter.nordicsemi.com/topic/comp_matrix_nrf9160/COMP/nrf9160/nrf9160_operator_certifications.html