diff --git a/df_datalink_sp/src/networking/link_layer/service.c b/df_datalink_sp/src/networking/link_layer/service.c
index a6277ab..297105f 100644
--- a/df_datalink_sp/src/networking/link_layer/service.c
+++ b/df_datalink_sp/src/networking/link_layer/service.c
@@ -134,7 +134,7 @@ static int32_t Service_Packing(L2_INST *instPtr, L2_FRAME_TYPE type, uint8_t dst
 	}
 	default:
 	{
-		DBG_ERROR("Unexpected frame type: %d.\n", type);
+		DBG_ERROR("Unexpected frame type: %" PRIu8 ".\n", type);
 		return EPARAM;
 		break;
 	}
@@ -279,7 +279,7 @@ int32_t L2_Service_PktHandler(L2_INST *instPtr, uint8_t *msg)
 		break;
 	}
 	default:
-		DBG_ERROR("Unsupported frame type: %d.\n", instPtr->frame.last);
+		DBG_ERROR("Unsupported frame type: %" PRIu8 ".\n", frameType);
 		break;
 	}
 	return Status;
@@ -357,7 +357,7 @@ int32_t L2_Service_Routine(L2_INST *instPtr, const L2_RTNE_TABLE_ENTRY *rtneEntr
 		L2_SetupNextSlot(instPtr, torState, L2_SVC_FRAME);
 		break;
 	default:
-		DBG_ERROR("UNKNOWN slot type [%d].\n", rtneEntry->slotType);
+		DBG_ERROR("UNKNOWN slot type [%" PRIu8 "].\n", rtneEntry->slotType);
 		return FAILURE;
 	}
 #ifdef DATALINK_ENABLE_BERTEST
diff --git a/df_datalink_sp/src/time_ctrl/time_ctrl.c b/df_datalink_sp/src/time_ctrl/time_ctrl.c
index 71aa5ae..5a3789d 100644
--- a/df_datalink_sp/src/time_ctrl/time_ctrl.c
+++ b/df_datalink_sp/src/time_ctrl/time_ctrl.c
@@ -218,13 +218,13 @@ void TimeCtrl_TimeAdjust(TMC_INST *instPtr, const TIME_WORD *tmWord, TIMECTRL_AD
 	ASSERT(tmWord != NULL);
 	if (type < TM_ADJ_ADD || TM_ADJ_ADD > TM_ADJ_SET)
 	{
-		DBG_ERROR("Unsupported adjustment type: %d", type);
+		DBG_ERROR("Unsupported adjustment type: %" PRId8 ".\n", type);
 		return;
 	}
 	if (((int32_t)tmWord->frac_part) > TIME_FRAC_MAX || ((int32_t)tmWord->frac_part) < -TIME_FRAC_MAX)
 	{
-		DBG_WARNING("Invalid fractional value %d (should between %d~%d)\n",
-					tmWord->frac_part, -TIME_FRAC_MAX, TIME_FRAC_MAX);
+		DBG_WARNING("Invalid fractional value %" PRIu32 " (should between %" PRIu32 "~%" PRIu32 ")\n",
+					tmWord->frac_part, (uint32_t)(-TIME_FRAC_MAX), (uint32_t)TIME_FRAC_MAX);
 		return;
 	}
 	TMC_Write(instPtr, TIME_ADJ_FRAC, tmWord->frac_part);