diff --git a/src/main/scala/backBoard/shin/SlaveParser.scala b/src/main/scala/backBoard/shin/SlaveParser.scala
index 20ed09a..d9964f8 100644
--- a/src/main/scala/backBoard/shin/SlaveParser.scala
+++ b/src/main/scala/backBoard/shin/SlaveParser.scala
@@ -593,6 +593,24 @@ trait SlaveParserRW{ this: SlaveParserBase =>
 
 
 trait SlaveParserSync{ this: SlaveParserBase =>
+  //下行接收
+  when( downRecParser.io.subMsgReq.fire ){
+    when( isDownRecPing ){
+      //override
+      when( downRecParser.io.subMsgReq.bits.operator === SUBMSG_OPERATOR_SYNC ) { //同步包
+        downSubMsgInfo(0).workCnt  := downRecParser.io.subMsgReq.bits.workCnt + 1.U
+      }
+
+    } .otherwise{ //pong
+      //override
+      when( downRecParser.io.subMsgReq.bits.operator === SUBMSG_OPERATOR_SYNC  ) { //同步包 )
+        downSubMsgInfo(1).workCnt := downRecParser.io.subMsgReq.bits.workCnt + 1.U
+      }
+    }
+  }
+
+
+
   val downTimeStamp = Reg(UInt(64.W)) //下行本地时间戳寄存器 
   val upTimeStamp   = Reg(UInt(64.W)) //上行本地时间戳寄存器
   val mstTimeStamp  = Reg(UInt(64.W)) //主站时间戳