code simplify

df_datalink_sp/src/systembus/systembus.c

@@ -380,18 +380,16 @@ int32_t SystemBus_HandleCmd(SYSBUS *instPtr)
 		{
 			// high power config
 			Phy_AntConfigMode(phyRef, PHY_ANT_MODE_HIGH_POWER);
-			Linklayer_Start(linkInstPtr);
-
 		}
 		else if(data[WD_EN_CMD] == EN_CMD_ON_LOW_POWER)
 		{
 			// low power config
 			Phy_AntConfigMode(phyRef, PHY_ANT_MODE_LOW_POWER);
-			Linklayer_Start(linkInstPtr);
 		}
 		else 
 		{
 			// silence config
+			// FIXME: confirm
 			// TODO: better approach?
 			Linklayer_Halt(linkInstPtr);
 			Phy_AntConfigMode(phyRef, PHY_ANT_MODE_SILENT);
@@ -403,9 +401,10 @@ int32_t SystemBus_HandleCmd(SYSBUS *instPtr)
 				DBG_ERROR("Physical set pull time failed, with error code: %" PRId32 ".\n", Status);
 			}
 			Phy_SetupNextSlot(phyRef, PHY_TOR_RX, L1_10KBPS_10MS_FRAME, NULL);
+			break;
 		}
 
-		_nop_(); // for debug
+		Linklayer_Start(linkInstPtr);
 		Status = SUCCESS;
 		break;
 	}