mainmenu "RT-Thread Configuration" config BSP_DIR string option env="BSP_ROOT" default "." config RTT_DIR string option env="RTT_ROOT" default "../.." config PKGS_DIR string option env="PKGS_ROOT" default "packages" config BOARD_STM32F411_NUCLEO bool select ARCH_ARM_CORTEX_M4 default y source "$RTT_DIR/Kconfig" source "$PKGS_DIR/Kconfig" config RT_USING_UART2 bool "Using UART2" default y