mainmenu "RT-Thread Configuration" config BSP_DIR string option env="BSP_ROOT" default "." config RTT_DIR string option env="RTT_ROOT" default "../../.." # you can change the RTT_ROOT default: "rt-thread" config PKGS_DIR string option env="PKGS_ROOT" default "packages" source "$RTT_DIR/Kconfig" source "$PKGS_DIR/Kconfig" source "board/Kconfig" config SOC_SAMD51 bool select ARCH_ARM select ARCH_ARM_CORTEX_M select ARCH_ARM_CORTEX_M4 select RT_USING_COMPONENTS_INIT select RT_USING_USER_MAIN default y