config RT_USING_UART1 bool "Enable UART1 (PA9/10)" default n config RT_USING_UART2 bool "Enable UART2 (PD5/6)" default y config RT_USING_UART3 bool "Enable UART3 (PC10/11)" default n config BSP_USING_RTC bool "Enable RTC" select RT_USING_RTC default n config BSP_USING_PIN bool "Enable PIN device for GPIO" select RT_USING_PIN default y