Hi,
In NCS 2.0, the ability to add a custom child image was added. This works fine but as soon as you include the mcuboot child image, the order of the child image builds changes.
For example,
If I build an application including mcuboot and the hci_rpmsg sample app, the child build order looks like this:
=== child image hci_rpmsg - CPUNET begin ===
=== child image b0n - CPUNET (inherited) begin ===
=== child image b0n - CPUNET (inherited) end ===
=== child image hci_rpmsg - CPUNET end ===
=== child image mcuboot - begin ===
=== child image mcuboot - end ===
If I build an application including mcuboot plus a custom child image, the child build order looks like this:
=== child image mcuboot - begin ===
=== child image mcuboot - end ===
=== child image hci_rpmsg - CPUNET begin ===
=== child image b0n - CPUNET (inherited) begin ===
=== child image b0n - CPUNET (inherited) end ===
=== child image hci_rpmsg - CPUNET end ===
The output of the mcuboot with the hci_rpmsg sample in the build/zephyr directory includes the following files:
app_to_sign.bin
app_update.bin
isrList.bin
net_core_app_to_sign.bin
net_core_app_update.bin zephyr.bin
zephyr.bin
The output of the mcuboot with the custom child image in the build/zephyr directory include the following files:
app_to_sign.bin
app_update.bin
isrList.bin
zephyr.bin
The build with the custom child image is missing the net_core_app_to_sign.bin and net_core_app_update.bin files.
I did some investigation and it looks like the two missing files are generated in the following C:\ncs\v2.0.0\nrf\modules\mcuboot\CMakeLists.txt file.
get_shared(cpunet_signed_app_hex IMAGE CPUNET PROPERTY PM_SIGNED_APP_HEX)
if (CONFIG_NRF53_UPGRADE_NETWORK_CORE
AND DEFINED cpunet_signed_app_hex)
# Network core application updates are enabled.
# We know this since MCUBoot is enabled on the application core, and
# a network core child image is included in the build.
# These updates are verified by the application core MCUBoot.
# Create a signed variant of the network core application.
get_shared(cpunet_images IMAGE CPUNET PROPERTY PM_DOMAIN_IMAGES)
foreach(image ${cpunet_images})
if(${image} MATCHES "CPUNET:(.*)")
set(image_name ${CMAKE_MATCH_1})
if(TARGET ${image_name}_subimage)
get_shared(${image_name}_byproducts IMAGE ${image_name} PROPERTY BUILD_BYPRODUCTS)
list(APPEND sign_depends ${image_name}_subimage ${${image_name}_byproducts})
endif()
endif()
endforeach()
set(net_core_binary_name net_core_app_update.bin)
if (CONFIG_NRF53_ENFORCE_IMAGE_VERSION_EQUALITY)
# Add dependency inside network core image to require the latest application core image.
set(sign_dependencies IMAGE_DEPENDENCIES "(${APPLICATION_IMAGE_PAIR_IDX},${CONFIG_MCUBOOT_IMAGE_VERSION})")
endif()
sign(
SIGNED_BIN_FILE_IN ${cpunet_signed_app_hex}
SIGNED_HEX_FILE_NAME_PREFIX ${PROJECT_BINARY_DIR}/net_core_app
SLOT_SIZE $<TARGET_PROPERTY:partition_manager,net_app_slot_size>
START_ADDRESS_OFFSET $<TARGET_PROPERTY:partition_manager,net_app_TO_SECONDARY>
SIGNED_HEX_FILE_OUT net_core_app_signed_hex
SIGNED_BIN_FILE_OUT net_core_app_signed_bin
SIGNED_HEX_TEST_FILE_OUT net_core_app_signed_test_hex
${sign_dependencies}
DEPENDS ${sign_depends}
)
add_custom_target(
net_core_app_sign_target
DEPENDS ${net_core_app_signed_hex}
${net_core_app_signed_bin}
${net_core_app_signed_test_hex}
)
add_dependencies(
mcuboot_sign_target
net_core_app_sign_target
)
get_shared(net_core_soc IMAGE net_core PROPERTY SOC)
get_shared(net_core_version IMAGE net_core PROPERTY VERSION)
set(generate_bin_files
${PROJECT_BINARY_DIR}/${app_core_binary_name}
${PROJECT_BINARY_DIR}/${net_core_binary_name}
)
set(generate_script_params
"${app_core_binary_name}load_address=$<TARGET_PROPERTY:partition_manager,PM_APP_ADDRESS>"
"${app_core_binary_name}image_index=0"
"${app_core_binary_name}slot_index_primary=1"
"${app_core_binary_name}slot_index_secondary=2"
"${app_core_binary_name}version_MCUBOOT=${CONFIG_MCUBOOT_IMAGE_VERSION}"
"${net_core_binary_name}image_index=1"
"${net_core_binary_name}slot_index_primary=3"
"${net_core_binary_name}slot_index_secondary=4"
"${net_core_binary_name}load_address=$<TARGET_PROPERTY:partition_manager,CPUNET_PM_APP_ADDRESS>"
"${net_core_binary_name}board=${CONFIG_DOMAIN_CPUNET_BOARD}"
"${net_core_binary_name}version=${net_core_version}"
"${net_core_binary_name}soc=${net_core_soc}"
)
else()
# No network core update
set(generate_bin_files
${PROJECT_BINARY_DIR}/${app_core_binary_name}
)
set(generate_script_params
"load_address=$<TARGET_PROPERTY:partition_manager,PM_APP_ADDRESS>"
"version_MCUBOOT=${CONFIG_MCUBOOT_IMAGE_VERSION}"
)
endif()
Since mcuboot is built first, the PM_SIGNED_APP_HEX variable (in line #1 above) is not defined. The PM_SIGNED_APP_HEX variable is set when the custom child image is built.
Let me know if there's a fix that I can apply to the CMake files to fix the build order. I haven't figured out a way to fix it yet.
Thanks
