config RT_USING_UART1
    bool "Enable UART1 (PB6/7)"
    default y

config RT_USING_UART2
    bool "Enable UART2 (PA2/3)"
    default y

config RT_USING_UART3
    bool "Enable UART3 (PD8/9)"
    default y

config RT_USING_UART4
    bool "Enable UART4 (PC10/11)"
    default n

config RT_USING_UART5
    bool "Enable UART5 (PC12/PD2)"
    default n