Hello, question about mcuboot, particularly the imgtool.py.
When I run west build, the build eventually fails on:
Error: Image size (0xbac8) + trailer (0xc30) exceeds requested size 0x1000
The builder runs the script with --slot-size 4096scripts/imgtool.py sign --version 0.0.0+0 --header-size 0x200 --slot-size 4096 --align 8 --key
Which is way too low.
Before that it reports after building the application that my application is about 47480 bytes.
Memory region Used Size Region Size %age Used FLASH: 47480 B 67248 B 70.60% RAM: 10752 B 31 KB 33.87% RetainedMem: 0 GB 4 B 0.00% IDT_LIST: 0 GB 32 KB 0.00%
My pm_static.yml looks like:
mcuboot:
address: 0x00000000
end_address: 0x0000C800
size: 0xC800 # 50 KB
region: flash_primary
app:
address: 0x0000C800
end_address: 0x00012800
size: 0x12800 # 74 KB
region: flash_primary
app_pad:
address: 0x0001F000
end_address: 0x00020000
size: 0x1000 # 4 KB
region: flash_primaryAnd my dts:
/ { chosen { zephyr,sram = &sram0; zephyr,flash = &flash0; zephyr,code-partition = &slot0_partition; zephyr,boot-mode = &retention0; };};&flash0 { partitions { compatible = "fixed-partitions"; #address-cells = <1>; #size-cells = <1>; boot_partition: partition@0 { label = "mcuboot"; reg = <0x00000000 DT_SIZE_K(50)>; // 50 KB read-only; }; slot0_partition: partition@C800 { label = "image-0"; reg = <0x0000C800 DT_SIZE_K(74)>; // 74 KB }; slot1_partition: partition@1F000 { label = "image-1"; reg = <0x0001F000 DT_SIZE_K(4)>; // 4 KB dummy partition }; };};CONFIG_BOOTLOADER_MCUBOOT=yCONFIG_REBOOT=yCONFIG_RETENTION_BOOT_MODE=yCONFIG_RETAINED_MEM=yCONFIG_RETENTION=yCONFIG_MCUBOOT_BOOTLOADER_MODE_SINGLE_APP=yCONFIG_MCUBOOT_SIGNATURE_KEY_FILE="root-rsa-2048.pem"CONFIG_BOOT_SIGNATURE_KEY_FILE="./root-rsa-2048.pem"CONFIG_BOOT_SERIAL_BOOT_MODE=yCONFIG_RETENTION_BOOT_MODE=yCONFIG_RETENTION=yCONFIG_RETAINED_MEM=yCONFIG_MCUBOOT_BOOTLOADER_MODE_SINGLE_APP=yCONFIG_CONSOLE=yCONFIG_FLASH=yBecause of my limited flash size (128kb) I want to run mcuboot as single app as specified in my prj.conf.
The linker appears to think it should sign the appliction for the slot1_partition which I confirmed when I increased the slot1 dummy partition size. Ideally I do not need to define a slot1, but that seems to be a requirement as I get CMake errors that it expects a slot1 when I remove it entirely.
Any help/guidance would be welcome!
