串口2接收数据，comm处理信息

drivers/board.h

@@ -71,6 +71,11 @@ extern "C"
 #define BSP_UART1_TX_PIN       "PA9"
 #define BSP_UART1_RX_PIN       "PA10"
 
+#define BSP_USING_UART2
+#define BSP_UART2_TX_PIN       "PA2"
+#define BSP_UART2_RX_PIN       "PA3"
+#define BSP_UART2_TX_USING_DMA
+#define BSP_UART2_RX_USING_DMA
 /*-------------------------- UART CONFIG END --------------------------*/
 
 /*-------------------------- I2C CONFIG BEGIN --------------------------*/