MCUboot with sysbuild
Overview
A simple example that demonstrates how building a sample using sysbuild can automatically include MCUboot as the bootloader. It showcases how the sample can adjust the configuration of extra image by creating a image specific Kconfig fragment.
Sysbuild specific settings
This sample automatically includes MCUboot as bootloader when built using sysbuild.
This is achieved with a sysbuild specific Kconfig configuration,
sysbuild.conf.
The SB_CONFIG_BOOTLOADER_MCUBOOT=y setting in the sysbuild Kconfig file
enables the bootloader when building with sysbuild.
The sysbuild/mcuboot.conf file will be used as an extra fragment that
is merged together with the default configuration files used by MCUboot.
sysbuild/mcuboot.conf adjusts the log level in MCUboot, as well as
configures MCUboot to prevent downgrades and operate in upgrade-only mode.
To build both the sample and MCUboot with west for the reel_board, run:
west build -b reel_board --sysbuild samples/sysbuild/with_mcuboot
Execution output:
*** Booting Zephyr OS build v3.2.0-rc3-209-gdcf4201d3573 ***
*** Booting Zephyr OS build v3.2.0-rc3-209-gdcf4201d3573 ***
Address of sample 0xc000
Hello sysbuild with mcuboot! nrf52840dk
The first Booting Zephyr OS build is printed by MCUboot itself and the
following lines are printed by the with_mcuboot sample.
This sample also prints its flash location.