下行报文载入寄存器

src/main/scala/backBoard/shin/SlaveParser.scala

@@ -35,42 +35,87 @@ abstract class SlaveParserBase extends Module{
   val downStateCurr = RegNext(downStateNext, STATE_IDLE(4.W))
 
   val lengthCnt = Reg(UInt(11.W)) //动态计数器
-  val subMsgCnt = Reg(UInt(7.W)) //子报文不超过64个？
+  //val subMsgCnt = Reg(UInt(7.W)) //子报文不超过128个
-  val subMsgLenAim = Reg(UInt(11.W)) //子报文长度
+  val subMsgLenAim = Reg(UInt(12.W)) //子报文长度
-  val FrameLenAim  = Reg(UInt(11.W)) //帧长度目标
+  val frameLenAim  = Reg(UInt(12.W)) //帧长度目标
-  val FrameLenCnt  = Reg(UInt(11.W)) //帧长度计数
+  val frameLenCnt  = Reg(UInt(12.W)) //帧长度计数
   val isCrcPass: Bool
   val isTxEnd: Bool
   val isShortRx: Bool //接收长度小于预期
+  val frameStyle = Reg(UInt(2.W)) //包类型
+  val devIndex = Reg(UInt(14.W)) //当前设备索引
+  val subMsg_devIndex = Reg(UInt(14.W)) // 子报文中设备索引
+  val subMsg_style    = Reg(UInt(2.W))  // 子报文类型
+  val subMsg_address  = Reg(UInt(16.W)) //子报文地址
+  val subMsg_operator = Reg(UInt(4.W))   //子报文命令类型
+  val subMsg_length   = Reg(UInt(12.W)) //子报文负载长度
+  val subMsg_workCnt  = Reg(UInt(16.W)) //子报文工作计数
+
+
+  when( downStateCurr === STATE_HEADER & lengthCnt === 0.U ){
+    frameLenAim := io.downIn.bits.tdata << 4
+  } .elsewhen( downStateCurr === STATE_HEADER & lengthCnt === 1.U ){
+    frameLenAim := frameLenAim | io.downIn.bits.tdata(7,4)
+    frameStyle := io.downIn.bits.tdata(1,0)
+  }
+
+  when( downStateCurr === STATE_PAYLOAD_INDEX_STYLE & lengthCnt === 0.U ){
+    subMsg_devIndex := io.downIn.bits.tdata << 6
+  } .elsewhen( downStateCurr === STATE_PAYLOAD_INDEX_STYLE & lengthCnt === 1.U ){
+    subMsg_devIndex := subMsg_devIndex | io.downIn.bits.tdata(7,2)
+    subMsg_style    := io.downIn.bits.tdata(1,0)
+  }
+
+  when( downStateCurr === STATE_PAYLOAD_ADDR & lengthCnt === 0.U ){
+    subMsg_address := io.downIn.bits.tdata << 8
+  } .elsewhen( downStateCurr === STATE_PAYLOAD_ADDR & lengthCnt === 1.U ){
+    subMsg_address := subMsg_address | io.downIn.bits.tdata
+  }
+
+  when( downStateCurr === STATE_PAYLOAD_OP_LENGTH & lengthCnt === 0.U ){
+    subMsg_operator := io.downIn.bits.tdata(7,4)
+    subMsg_length   := io.downIn.bits.tdata(3,0) << 8
+  } .elsewhen( downStateCurr === STATE_PAYLOAD_OP_LENGTH & lengthCnt === 1.U ){
+    subMsg_length   := subMsg_length | io.downIn.bits.tdata(7,0)
+  }
+
+  when( downStateCurr === STATE_PAYLOAD_WORKCNT & lengthCnt === 0.U ){
+    subMsg_workCnt := io.downIn.bits.tdata(7,0) << 8
+  } .elsewhen( downStateCurr === STATE_PAYLOAD_WORKCNT & lengthCnt === 1.U ){
+    subMsg_workCnt := subMsg_workCnt | io.downIn.bits.tdata(7,0)
+  }
+
 
   downStateNext := 
     Mux1H(Seq(
                                                         //必须使用上升沿触发，以避免前一帧长度超过预期
       ( downStateCurr === STATE_IDLE                ) -> Mux( ~RegNext(io.downIn.axis.valid) & io.downIn.axis.valid, STATE_HEADER, STATE_IDLE ), 
       ( downStateCurr === STATE_HEADER              ) -> Mux( isShortRx, STATE_ERROR,
+          Mux( lengthCnt === 0, STATE_HEADER,
             MuxCase( STATE_ERROR, Array(
               ( io.downIn.axis.bits(1,0) === FRAME_STYLE_COMMON ) -> STATE_PAYLOAD_INDEX_STYLE,
               ( io.downIn.axis.bits(1,0) === FRAME_STYLE_PROBE  ) -> STATE_CRC,
             ))
+          )
         ),
       ( downStateCurr === STATE_PAYLOAD_INDEX_STYLE ) -> Mux( isShortRx, STATE_ERROR,
-          STATE_PAYLOAD_ADDR
+          Mux( lengthCnt === 0, STATE_PAYLOAD_INDEX_STYLE, STATE_PAYLOAD_ADDR )
         ),
-      ( downStateCurr === STATE_PAYLOAD_ADDR        ) -> Mux( isShortRx,
+      ( downStateCurr === STATE_PAYLOAD_ADDR        ) -> Mux( isShortRx, STATE_ERROR,
-          STATE_PAYLOAD_OP_LENGTH
+          Mux( lengthCnt === 0, STATE_PAYLOAD_ADDR, STATE_PAYLOAD_OP_LENGTH )
         ),
-      ( downStateCurr === STATE_PAYLOAD_OP_LENGTH   ) -> Mux( isShortRx,
+      ( downStateCurr === STATE_PAYLOAD_OP_LENGTH   ) -> Mux( isShortRx, STATE_ERROR,
-          STATE_PAYLOAD_WORKCNT
+          Mux( lengthCnt === 0, STATE_PAYLOAD_OP_LENGTH, STATE_PAYLOAD_WORKCNT )
         ),
-      ( downStateCurr === STATE_PAYLOAD_WORKCNT     ) -> Mux( isShortRx,
+      ( downStateCurr === STATE_PAYLOAD_WORKCNT     ) -> Mux( isShortRx, STATE_ERROR,
-          Mux( lengthCnt === (2 - 1).U, STATE_PAYLOAD_DATA, STATE_PAYLOAD_WORKCNT )
+          Mux( lengthCnt === 0.U, STATE_PAYLOAD_WORKCNT, STATE_PAYLOAD_DATA )
         ),
-      ( downStateCurr === STATE_PAYLOAD_DATA        ) -> Mux( isShortRx, 
+      ( downStateCurr === STATE_PAYLOAD_DATA        ) -> Mux( isShortRx, STATE_ERROR,
           Mux( lengthCnt === (subMsgLen - 1.U), 
-            Mux(FrameLenCnt === FrameLenAim, STATE_CRC, STATE_PAYLOAD_INDEX_STYLE
+            Mux(frameLenCnt === frameLenAim, STATE_CRC, STATE_PAYLOAD_INDEX_STYLE
           ), STATE_PAYLOAD_DATA )
         ),
-      ( downStateCurr === STATE_CRC                 ) -> Mux( isShortRx, 
+      ( downStateCurr === STATE_CRC                 ) -> Mux( isShortRx, STATE_ERROR,
           Mux( lengthCnt === (4 - 1).U, Mux( isCrcPass, STATE_IDLE, STATE_ERROR), STATE_CRC )
         ),
       ( downStateCurr === STATE_ERROR               ) -> Mux( isTxEnd, STATE_IDLE, STATE_ERROR ),