config RT_USING_EXT_SDRAM
bool "Enable SDRAM on the board"
default y
config RT_USING_UART1
bool "Enable UART1"
config RT_USING_UART2
bool "Enable UART2"
default n
config RT_USING_UART3
bool "Enable UART3"
config RT_USING_SPI5
bool "Enable SPI5"