Kconfig

menuconfig RT_USING_SERIAL
    bool "USING Serial device drivers"
    select RT_USING_DEVICE_IPC
    select RT_USING_DEVICE
    default y

    if RT_USING_SERIAL
        choice
            prompt "Choice Serial version"
            default RT_USING_SERIAL_V1
            config RT_USING_SERIAL_V1
                bool "RT_USING_SERIAL_V1"
            config RT_USING_SERIAL_V2
                bool "RT_USING_SERIAL_V2"
        endchoice
        config RT_SERIAL_USING_DMA
            bool "Enable serial DMA mode"
            default y

        config RT_SERIAL_RB_BUFSZ
            int "Set RX buffer size"
            depends on !RT_USING_SERIAL_V2
            default 64
        config RT_USING_SERIAL_BYPASS
            bool "Using serial bypass"
            default n
        endif