update systembus: omit redundant code

df_datalink_sp/src/systembus/systembus.c

@@ -453,7 +453,10 @@ int32_t SystemBus_HandleCmd(SYSBUS *instPtr)
 			Phy_SetupNextSlot(phyRef, PHY_TOR_RX, L1_10KBPS_10MS_FRAME, NULL);
 			break;
 		}
-
+		if (reconfig == true)
+		{
+			Linklayer_Reconfig(linkInstPtr, &linkConfig);
+		}
 		Linklayer_Start(linkInstPtr);
 		instPtr->sysbusLog.lastConfig[0] = data[WD_MODE_CMD];
 		instPtr->sysbusLog.lastConfig[1] = data[WD_EN_CMD];

df_datalink_sp/src/systembus/systembus_uart.h

@@ -73,10 +73,9 @@ typedef struct
 
 typedef struct
 {
-	uint8_t len;
+	uint16_t len;
 	uint8_t checkSum;
 	uint8_t isValid;
-	uint8_t dummy;
 	uint8_t data[256];
 } SYSBUS_UART_FRAME;