Hello,
I'm trying to use MCUBOOT with external flash on a nRF52840 board that has 4MB SPI flash. I'm using nRF Connect SDK v2.6.0.
I've verified that the SPI flash works fine using the "spi_flash" sample.
With CONFIG_BOOTLOADER_MCUBOOT=n, SMP with SPI flash runs fine. I'm able to connect to the "Zephyr" BLE device from nRF Connect for mobile.
However, with CONFIG_BOOTLOADER_MCUBOOT=y, the build is successful but the nRF52840 board fails to boot.
As the nRF52840 board (particle_xenon) has SPI flash instead of QSPI, I've set CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=n and added the required Kconfig dependencies.
Here is the prj.conf:
CONFIG_BT=y CONFIG_BT_PERIPHERAL=y CONFIG_MCUMGR=y CONFIG_ZCBOR=y CONFIG_CRC=y CONFIG_MCUMGR_TRANSPORT_BT=y CONFIG_MCUMGR_TRANSPORT_BT_CONN_PARAM_CONTROL=y CONFIG_IMG_MANAGER=y CONFIG_STREAM_FLASH=y CONFIG_FLASH_MAP=y CONFIG_MCUMGR_GRP_IMG=y CONFIG_MCUMGR_GRP_OS=y CONFIG_MCUMGR_GRP_OS_BOOTLOADER_INFO=y CONFIG_MCUMGR_TRANSPORT_BT_REASSEMBLY=y CONFIG_BASE64=y CONFIG_MCUMGR_TRANSPORT_SHELL=y CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=n CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU_SPEEDUP=y CONFIG_BOOTLOADER_MCUBOOT=y CONFIG_NORDIC_QSPI_NOR=n CONFIG_FLASH=y CONFIG_SPI=y CONFIG_SPI_NOR=y CONFIG_SPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096 CONFIG_LOG=y CONFIG_PRINTK=y CONFIG_CONSOLE=y CONFIG_SERIAL=y # Preferred SHELL options CONFIG_SHELL=y CONFIG_BOOT_BANNER=y CONFIG_DATE_SHELL=y CONFIG_POSIX_CLOCK=y CONFIG_DEVICE_SHELL=n CONFIG_INIT_STACKS=y CONFIG_KERNEL_SHELL=y CONFIG_SHELL_STATS=n
The board configuration "particle_xenon.conf" is set to use SPI flash:
CONFIG_FLASH=y CONFIG_SPI=y CONFIG_SPI_NOR=y
The board "particle_xenon.overlay" is configured to use the external SPI flash (&mx25l32 is defined in "particle_xenon.dts" board):
/ {
chosen {
nordic,pm-ext-flash = &mx25l32;
};
};For MCUBOOT, folder "child_image > mcuboot > boards" has the board configuration & overlay files as,
particle_xenon.conf:
particle_xenon.overlay:
MCUBOOT > zephyr > zephyr.dts does include the "nordic,pm-ext-flash".
Here's a snippet from the file:
particle_xenon.conf:
CONFIG_PM=n CONFIG_MAIN_STACK_SIZE=10240 CONFIG_MBEDTLS_CFG_FILE="mcuboot-mbedtls-cfg.h" 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 CONFIG_FPROTECT=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=y CONFIG_LOG_MODE_MINIMAL=y # 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=y ### Decrease footprint by ~4 KB in comparison to CBPRINTF_COMPLETE=y CONFIG_CBPRINTF_NANO=y CONFIG_NRF_RTC_TIMER_USER_CHAN_COUNT=0 ### Use the minimal C library to reduce flash usage CONFIG_MINIMAL_LIBC=y ### Enable serial recovery CONFIG_MCUBOOT_SERIAL=y CONFIG_BOOT_SERIAL_CDC_ACM=y CONFIG_BOOT_SERIAL_NO_APPLICATION=y CONFIG_UART_CONSOLE=n ### Increase receive buffer to improve transfer speed in serial recovery mode CONFIG_BOOT_MAX_LINE_INPUT_LEN=8192 CONFIG_BOOT_SERIAL_MAX_RECEIVE_SIZE=4096 ### Enable SPI flash CONFIG_NORDIC_QSPI_NOR=n CONFIG_SPI=y CONFIG_SPI_NOR=y CONFIG_SPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096 ### Partition size allocated to bootloader - can be reduced if logging is disabled CONFIG_PM_PARTITION_SIZE_MCUBOOT=0x12000
particle_xenon.overlay:
/ {
chosen {
nordic,pm-ext-flash = &mx25l32;
};
aliases {
mcuboot-button0 = &mode_button;
};
};MCUBOOT > zephyr > zephyr.dts does include the "nordic,pm-ext-flash".
Here's a snippet from the file:
model = "Particle Xenon";
compatible = "particle,xenon", "particle,feather";
chosen {
zephyr,entropy = &cryptocell;
zephyr,flash-controller = &flash_controller;
zephyr,console = &uart0;
zephyr,uart-mcumgr = &uart0;
zephyr,shell-uart = &uart0;
zephyr,sram = &sram0;
zephyr,flash = &flash0;
zephyr,code-partition = &slot0_partition;
zephyr,ieee802154 = &ieee802154;
nordic,pm-ext-flash = &mx25l32;
};What could be the reason for the application not running?
Am I missing some configuration or is part of it incorrect? Thank you.
Am I missing some configuration or is part of it incorrect? Thank you.
Regards,
Ravi
