diff --git a/APELib/Receiver_sync_first/src/receiver_Sync_First_Proc.s.c b/APELib/Receiver_sync_first/src/receiver_Sync_First_Proc.s.c
index 3305ebe..35cc15d 100644
--- a/APELib/Receiver_sync_first/src/receiver_Sync_First_Proc.s.c
+++ b/APELib/Receiver_sync_first/src/receiver_Sync_First_Proc.s.c
@@ -283,7 +283,7 @@ void Receiver_First_Sync_Proc(receiver_sync2first_sync_t* msg_ptr, uint32_t msg_
     WAIT_MPU_STOP;
     TRACE(TRACE_RECEIVER_SYNC_FIRST_ADDR, 3, 5); 
     //dm_check(1);
-    maxPosition = receiver_sync_first_temp_dm3_ptr[0];
+    maxPosition = 0xffff & receiver_sync_first_temp_dm3_ptr[0];
     maxsum = receiver_sync_first_temp_dm3_ptr[1];
     LOG_ERROR_S("1 maxPosition:%d maxsum:%d\n",maxPosition, maxsum);
 
@@ -346,10 +346,10 @@ void Receiver_First_Sync_Proc(receiver_sync2first_sync_t* msg_ptr, uint32_t msg_
     WAIT_MPU_STOP;
 
     TRACE(TRACE_RECEIVER_SYNC_FIRST_ADDR, 3, 7); 
-    LOG_ERROR_S("2 maxPosition:%d maxsum:%d\n",receiver_sync_first_temp_dm3_ptr[0], receiver_sync_first_temp_dm3_ptr[1]);
+    LOG_ERROR_S("2 maxPosition:%d maxsum:%d\n",0xffff & receiver_sync_first_temp_dm3_ptr[0], receiver_sync_first_temp_dm3_ptr[1]);
     if(maxsum < receiver_sync_first_temp_dm3_ptr[1])
     {
-        maxPosition = receiver_sync_first_temp_dm3_ptr[0];
+        maxPosition = 0xffff & receiver_sync_first_temp_dm3_ptr[0];
         maxsum = receiver_sync_first_temp_dm3_ptr[1];
     }
     LOG_ERROR_S("3 maxPosition:%d maxsum:%d\n",maxPosition, maxsum);