test_led_strip/sysbuild/mcuboot.overlay
zhangyisong de68631faf Add DFU support with MCUboot serial recovery
Implement device firmware upgrade using MCUboot Serial Recovery over
usart1 (reusing the existing protocol UART). The application layer
handles upgrade commands (0xFF) to trigger bootloader entry, while
MCUboot manages the actual firmware swap with RSA signature
verification.

Key additions:
- sysbuild.conf to enable MCUboot bootloader with signing key
- mcuboot.conf with serial recovery and watchdog feed settings
- Kconfig option APP_DFU (default y) with conditional compilation
- dfu.cpp module for DFU initialization
- Upgrade command callback in com.hpp (bootmode_set + sys_reboot)
- Documentation for upgrade procedures and change notes
2026-08-18 21:39:59 +08:00

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/* MCUboot serial recovery 使用 zephyr,uart-mcumgr (已在板级 dts 指定为 &usart1)
* zephyr,console 保持 &usart3 (调试口),两者不能指向同一设备 */