转发延迟缩减至126个cycle

src/main/scala/backBoard/shin/SlaveSendGen.scala

@@ -20,6 +20,7 @@ class SlaveSendGenIO extends Bundle{
   val send = Decoupled(new AXIS_Bundle(8))
 
   val isError = Output(Bool())
+  val stateCurr = Output(UInt(3.W))
 }
 
 
@@ -40,11 +41,11 @@ class SlaveSendGen extends Module{
   val STATE_SUBMSG_DATA     = 3.U
   val STATE_CRC             = 4.U //CRC校验
   val STATE_ERROR           = 5.U
-  // val STATE_WAIT            = 6.U
+  val STATE_WAIT            = 6.U
 
 
   val stateNext = Wire(UInt(3.W))
-  val stateCurr = RegNext(stateNext, STATE_IDLE)
+  val stateCurr = RegNext(stateNext, STATE_IDLE); io.stateCurr := stateCurr
 
   io.isError := stateCurr === STATE_ERROR
 
@@ -116,18 +117,19 @@ class SlaveSendGen extends Module{
     (stateCurr === STATE_IDLE)          -> Mux( io.frameReq.fire, STATE_FRAME_HEADER, STATE_IDLE ),
     (stateCurr === STATE_FRAME_HEADER)  -> Mux( io.send.fire, Mux( lengthCnt === (4-1).U, Mux( 
       frameInfo.frameStyle === FRAME_STYLE_COMMON,
-        Mux(io.subMsgReq.valid, STATE_SUBMSG_HEADER, STATE_ERROR),
+        Mux(io.subMsgReq.valid, STATE_SUBMSG_HEADER, STATE_WAIT),
         STATE_CRC ),
       STATE_FRAME_HEADER), STATE_FRAME_HEADER ),
     (stateCurr === STATE_SUBMSG_HEADER) -> Mux( io.send.fire, Mux( lengthCnt === (8-1).U, STATE_SUBMSG_DATA, STATE_SUBMSG_HEADER), STATE_SUBMSG_HEADER),
     (stateCurr === STATE_SUBMSG_DATA)   -> Mux( io.send.fire, 
       Mux( lengthCnt === subMsgInfoSel.length-1.U,    //已经发送完成该子报文
         Mux( frameLenCnt === frameInfo.frameLenAim -1.U, STATE_CRC, //主报文长度达到， 进CRC
-          Mux( io.subMsgReq.valid, STATE_SUBMSG_HEADER, STATE_ERROR ) ), //主报文长度未到，进下一个子报文
+          Mux( io.subMsgReq.valid, STATE_SUBMSG_HEADER, STATE_WAIT ) ), //主报文长度未到，进下一个子报文
         STATE_SUBMSG_DATA
       ), STATE_SUBMSG_DATA ),
     (stateCurr === STATE_CRC)           -> Mux( io.send.fire, Mux( lengthCnt === (4-1).U, STATE_IDLE, STATE_CRC ), STATE_CRC),
     (stateCurr === STATE_ERROR)         -> Mux( io.send.fire, STATE_IDLE, STATE_ERROR),
+    (stateCurr === STATE_WAIT)          -> Mux( io.subMsgReq.valid, STATE_SUBMSG_HEADER, STATE_WAIT),
   ))
 
   io.data(0).ready := io.send.fire & (stateCurr === STATE_SUBMSG_DATA) & (subMsgInfoSel.source === 0.U)