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" source "$RTT_DIR/Kconfig" source "$PKGS_DIR/Kconfig" config RT_USING_UART0 bool "Using RT_USING_UART0" default n config RT_USING_UART3 bool "Using RT_USING_UART3" default y config RT_USING_UART4 bool "Using RT_USING_UART4" default n config RT_USING_LED bool "Using RT_USING_LED" default y help led blink demo