Hi.
When I made a application with mcuboot on nRF54L15DK.
In order to reduce power consumption, I want to disable serial log(UART).
I added these configuration in the prj.conf like below.
# # Copyright (c) 2024 Nordic Semiconductor # # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause # # Step 1 - Enable nrfx drivers # CONFIG_NRFX_GRTC=y #CONFIG_NRFX_SAADC=y #CONFIG_NRFX_GPPI=y #CONFIG_NRFX_TIMER2=y CONFIG_NRFX_TIMER22=y CONFIG_GPIO=y CONFIG_I2C=y CONFIG_COMPILER_OPT="-DARM_TABLE_TWIDDLECOEF_F32_64 -DARM_TABLE_BITREVIDX_FLT_64 -DARM_TABLE_TWIDDLECOEF_F32_64 -DARM_TABLE_TWIDDLECOEF_RFFT_F32_128 -DARM_MATH_CM4" CONFIG_CMSIS_DSP=y CONFIG_DSP=y CONFIG_CMSIS_DSP_FASTMATH=y CONFIG_CMSIS_DSP_STATISTICS=y CONFIG_CMSIS_DSP_MATRIX=y #CONFIG_NEWLIB_LIBC=y #CONFIG_CMSIS_DSP_BAYES=y CONFIG_CMSIS_DSP_TRANSFORM=y CONFIG_CMSIS_DSP_SUPPORT=y CONFIG_CMSIS_DSP_COMPLEXMATH=y CONFIG_CMSIS_DSP_CONTROLLER=y CONFIG_DSP_BACKEND_CMSIS=y CONFIG_FPU=y #https://docs.nordicsemi.com/bundle/ncs-3.1.0-preview1/page/nrf/test_and_optimize/optimizing/power_general.html CONFIG_LOG=n #CONFIG_PM_DEVICE=y #CONFIG_POWEROFF=y #CONFIG_HWINFO=y #CONFIG_GRTC_WAKEUP_ENABLE=y #CONFIG_GPIO_WAKEUP_ENABLE=n #https://docs.nordicsemi.com/bundle/zephyr-apis-latest/page/group_sys_poweroff.html #CONFIG_POWEROFF=y #added in order to get the thread name printed in the assertion log. CONFIG_THREAD_NAME=y CONFIG_MAIN_STACK_SIZE=2048 CONFIG_ADC=y # Step 2 - Enable Bluetooth # CONFIG_BT=y CONFIG_BT_DEVICE_NAME="WN21_009" CONFIG_BT_PERIPHERAL=y CONFIG_BT_EXT_ADV=y CONFIG_BT_BROADCASTER=y CONFIG_BT_OBSERVER=y # Step 3 - Enable Coded PHY for Bluetooth LE # CONFIG_BT_USER_PHY_UPDATE=y CONFIG_BT_CTLR_PHY_CODED=y # Step 4 - Enable Bluetooth LE Extended Advertising # CONFIG_BT_EXT_ADV=y CONFIG_BT_CTLR_ADV_EXT=y CONFIG_BT_EXT_ADV_MAX_ADV_SET=2 CONFIG_BT_CTLR_ADV_DATA_LEN_MAX=251 # STEP 2.2 - Enable FOTA over Bluetooth LE CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y CONFIG_MCUBOOT_BOOTUTIL_LIB=y CONFIG_WATCHDOG=n CONFIG_FLASH=n CONFIG_PM=n CONFIG_DYNAMIC_INTERRUPTS=n CONFIG_IRQ_OFFLOAD=n CONFIG_THREAD_STACK_INFO=n CONFIG_THREAD_CUSTOM_DATA=n CONFIG_BOOT_BANNER=n CONFIG_BOOT_DELAY=0 #CONFIG_CONSOLE=n #CONFIG_UART_CONSOLE=n #CONFIG_STDOUT_CONSOLE=n #CONFIG_PRINTK=n CONFIG_EARLY_CONSOLE=n CONFIG_SIZE_OPTIMIZATIONS=y #CONFIG_SINGLE_APPLICATION_SLOT=y #CONFIG_PM_PARTITION_SIZE_MCUBOOT_SECONDARY=0xC8000 # 800KB #CONFIG_PM_PARTITION_SIZE_MCUBOOT_SECONDARY=0xB0000 # Step 5 - Enable RTC for low power operation # #CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y #for enable P0.01 GPIO CONFIG_BT_HCI_CORE_LOG_LEVEL_OFF=y CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=n CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION=y CONFIG_CLOCK_CONTROL_NRF_K32SRC_500PPM=y CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=y CONFIG_MPSL_HFCLK_LATENCY=1650 CONFIG_NFCT_PINS_AS_GPIOS=y # Disable unused features to reduce power consumption CONFIG_PRINTK=n CONFIG_STDOUT_CONSOLE=n CONFIG_LOG_PRINTK=n CONFIG_LOG_PROCESS_THREAD=n
I also show the configuration in the prj.conf in mcuboot.
CONFIG_PM=n CONFIG_MAIN_STACK_SIZE=10240 CONFIG_BOOT_SWAP_SAVE_ENCTLV=n CONFIG_BOOT_ENCRYPT_IMAGE=n CONFIG_BOOT_UPGRADE_ONLY=n CONFIG_BOOT_BOOTSTRAP=n ### mbedTLS has its own heap # CONFIG_HEAP_MEM_POOL_SIZE is not set ### We never want Zephyr's copy of tinycrypt. If tinycrypt is needed, ### MCUboot has its own copy in tree. # CONFIG_TINYCRYPT is not set # CONFIG_TINYCRYPT_ECC_DSA is not set # CONFIG_TINYCRYPT_SHA256 is not set CONFIG_FLASH=y ### Various Zephyr boards enable features that we don't want. # CONFIG_BT is not set # CONFIG_BT_CTLR is not set # CONFIG_I2C is not set CONFIG_LOG=n CONFIG_LOG_MODE_MINIMAL=n # former CONFIG_MODE_MINIMAL ### Ensure Zephyr logging changes don't use more resources CONFIG_LOG_DEFAULT_LEVEL=0 ### Use info log level by default CONFIG_MCUBOOT_LOG_LEVEL_INF=n ### Decrease footprint by ~4 KB in comparison to CBPRINTF_COMPLETE=y CONFIG_CBPRINTF_NANO=n ### Use picolibc to reduce flash usage CONFIG_PICOLIBC=y ### Disable malloc arena because we don't need it CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE=0 CONFIG_NRF_RTC_TIMER_USER_CHAN_COUNT=0 # NCS boot banner CONFIG_NCS_APPLICATION_BOOT_BANNER_STRING="MCUboot" CONFIG_BOOT_BANNER=n CONFIG_PRINTK=n CONFIG_STDOUT_CONSOLE=n CONFIG_LOG_PRINTK=n CONFIG_LOG_PROCESS_THREAD=n CONFIG_BOOT_BANNER=n CONFIG_LOG=n
Nordic AI said, "there is no more configuration to add in the prj.conf."
But, I confirmed this software banner when the board reset.
*** Booting MCUboot v2.1.0-dev-2b69d93e75bc *** *** Using nRF Connect SDK v3.1.0-6c6e5b32496e *** *** Using Zephyr OS v4.1.99-1612683d4010 *** *** Booting My Application v0.1.6-debug-01cdfea88343 *** *** Using nRF Connect SDK v3.1.0-6c6e5b32496e *** *** Using Zephyr OS v4.1.99-1612683d4010 ***
So, how should I add any configuration without this banner?
Best regards.