menu "Hardware Drivers Config" menu "Onboard Peripheral Drivers" endmenu menu "On-chip Peripheral Drivers" config BSP_USING_GPIO bool "Enable GPIO" select RT_USING_PIN default y menuconfig BSP_USING_UART bool "Enable UART" default y select RT_USING_SERIAL if BSP_USING_UART config BSP_USING_UART2 bool "Enable UART2" default y endif endmenu menu "Board extended module Drivers" endmenu endmenu