diff --git a/src/main/scala/backBoard/shin/ShinSlv.scala b/src/main/scala/backBoard/shin/ShinSlv.scala
index fa9f8c7..e79d3ad 100644
--- a/src/main/scala/backBoard/shin/ShinSlv.scala
+++ b/src/main/scala/backBoard/shin/ShinSlv.scala
@@ -97,14 +97,14 @@ trait ShinSlvPhyDownStreamRecv{ this: ShinSlvPhyBase =>
 
   downRecvStateNext := Mux1H(Seq(
     (downRecvStateCurr === DownRecvStateIdle ) -> Mux( downPendBuf.io.deq.valid, DownRecvStateOHead, DownRecvStateIdle ),
-    (downRecvStateCurr === DownRecvStateOHead) -> Mux( downPendBuf.io.deq.fire, Mux( ~downPendBuf.io.deq.bits.tlast, Mux(downRecvCnt === ((headByte)-1).U,        DownRecvStateSData, DownRecvStateOHead), DownRecvStateIdle ), DownRecvStateOHead), 
-    (downRecvStateCurr === DownRecvStateSData) -> Mux( downPendBuf.io.deq.fire, Mux( ~downPendBuf.io.deq.bits.tlast, Mux(downRecvCnt === (downLocalDataByte -1.U),  Mux( downRecvCnt === (downOldHead.length - 1.U), DownRecvStateCRC, DownRecvStateFData ), DownRecvStateSData), DownRecvStateIdle ), DownRecvStateSData),
-    (downRecvStateCurr === DownRecvStateFData) -> Mux( downPendBuf.io.deq.fire, Mux( ~downPendBuf.io.deq.bits.tlast, Mux(downRecvCnt === (downForwardDataByte -1.U) , DownRecvStateCRC,   DownRecvStateFData), DownRecvStateIdle ), DownRecvStateFData),
+    (downRecvStateCurr === DownRecvStateOHead) -> Mux( downPendBuf.io.deq.fire, Mux( ~downPendBuf.io.deq.bits.tlast, Mux(downRecvCnt === ((headByte)).U,        DownRecvStateSData, DownRecvStateOHead), DownRecvStateIdle ), DownRecvStateOHead), 
+    (downRecvStateCurr === DownRecvStateSData) -> Mux( downPendBuf.io.deq.fire, Mux( ~downPendBuf.io.deq.bits.tlast, Mux(downRecvCnt === (downLocalDataByte ),  Mux( downRecvCnt === (downOldHead.length - 1.U), DownRecvStateCRC, DownRecvStateFData ), DownRecvStateSData), DownRecvStateIdle ), DownRecvStateSData),
+    (downRecvStateCurr === DownRecvStateFData) -> Mux( downPendBuf.io.deq.fire, Mux( ~downPendBuf.io.deq.bits.tlast, Mux(downRecvCnt === (downForwardDataByte ) , DownRecvStateCRC,   DownRecvStateFData), DownRecvStateIdle ), DownRecvStateFData),
     (downRecvStateCurr === DownRecvStateCRC  ) -> Mux( downPendBuf.io.deq.fire & downPendBuf.io.deq.bits.tlast, DownRecvStateIdle, DownRecvStateCRC ),
   ))
 
   when( downRecvStateCurr =/= downRecvStateNext ){
-    downRecvCnt := 0.U
+    downRecvCnt := 1.U
   } .elsewhen( downPendBuf.io.deq.fire ){
     downRecvCnt := downRecvCnt + 1.U
   }
@@ -126,7 +126,7 @@ trait ShinSlvPhyDownStreamRecv{ this: ShinSlvPhyBase =>
 
 
   when( downRecvStateCurr === DownRecvStateSData & downPendBuf.io.deq.fire ){
-    downRegTemp(downRecvCnt) := downPendBuf.io.deq.bits.tdata
+    downRegTemp(downRecvCnt-1.U) := downPendBuf.io.deq.bits.tdata
   }
 
   //---------------
@@ -134,7 +134,7 @@ trait ShinSlvPhyDownStreamRecv{ this: ShinSlvPhyBase =>
     downRecvStateCurr === DownRecvStateFData & downPendBuf.io.deq.fire & ~isLastDevice
   downStreamFifo.io.enq.bits.tdata := downPendBuf.io.deq.bits.tdata
   downStreamFifo.io.enq.bits.tuser := downPendBuf.io.deq.bits.tuser
-  downStreamFifo.io.enq.bits.tlast := downRecvCnt === (downForwardDataByte -1.U) | downPendBuf.io.deq.bits.tlast
+  downStreamFifo.io.enq.bits.tlast := downRecvCnt === (downForwardDataByte) | downPendBuf.io.deq.bits.tlast
 
   downPendBuf.io.deq.ready := 
     (downRecvStateCurr === DownRecvStateOHead) |
@@ -156,7 +156,7 @@ trait ShinSlvPhyDownStreamRecv{ this: ShinSlvPhyBase =>
   } .elsewhen( downRecvStateCurr === DownRecvStateFData & downRecvStateNext === DownRecvStateIdle ){
     isDownStreamError := true.B
     printf("Warning, Wrong Package Received in DownStream, That could not happened!\n")
-  } .elsewhen( downRecvStateCurr === DownRecvStateCRC & (downRecvCnt > 3.U | (downPendBuf.io.deq.fire & downPendBuf.io.deq.bits.tlast & downRecvCnt < 3.U)) ){
+  } .elsewhen( downRecvStateCurr === DownRecvStateCRC & downPendBuf.io.deq.fire & downPendBuf.io.deq.bits.tlast & downRecvCnt =/= 4.U ){
     isDownStreamError := true.B
     printf("Warning, Wrong Package Received in DownStream, That could not happened!\n")
   } .elsewhen( isDownNewHeadCreated & downOldHead.length < downLocalDataByte ){ //本包的负载不能满足本级数据需求，传输错误