eth_top.v

该文件包含以太网IP核的相关代码

  .Cs(RegCs),                             .Clk(wb_clk_i),                             .Reset(wb_rst_i), 
  .DataOut(RegDataOut),                   .r_DmaEn(r_DmaEn),                          .r_RecSmall(), 
  .r_Pad(r_Pad),                          .r_HugEn(r_HugEn),                          .r_CrcEn(r_CrcEn), 
  .r_DlyCrcEn(r_DlyCrcEn),                .r_Rst(r_Rst),                              .r_FullD(r_FullD), 
  .r_ExDfrEn(r_ExDfrEn),                  .r_NoBckof(r_NoBckof),                      .r_LoopBck(r_LoopBck), 
  .r_IFG(r_IFG),                          .r_Pro(),                                   .r_Iam(), 
  .r_Bro(),                               .r_NoPre(r_NoPre),                          .r_TxEn(r_TxEn), 
  .r_RxEn(r_RxEn),                        .Busy_IRQ(Busy_IRQ),                        .RxF_IRQ(RxF_IRQ), 
  .RxB_IRQ(RxB_IRQ),                      .TxE_IRQ(TxE_IRQ),                          .TxB_IRQ(TxB_IRQ), 
  .r_IPGT(r_IPGT), 
  .r_IPGR1(r_IPGR1),                      .r_IPGR2(r_IPGR2),                          .r_MinFL(r_MinFL), 
  .r_MaxFL(r_MaxFL),                      .r_MaxRet(r_MaxRet),                        .r_CollValid(r_CollValid), 
  .r_TxFlow(r_TxFlow),                    .r_RxFlow(r_RxFlow),                        .r_PassAll(r_PassAll), 
  .r_MiiMRst(r_MiiMRst),                  .r_MiiNoPre(r_MiiNoPre),                    .r_ClkDiv(r_ClkDiv), 
  .r_WCtrlData(r_WCtrlData),              .r_RStat(r_RStat),                          .r_ScanStat(r_ScanStat), 
  .r_RGAD(r_RGAD),                        .r_FIAD(r_FIAD),                            .r_CtrlData(r_CtrlData), 
  .NValid_stat(NValid_stat),              .Busy_stat(Busy_stat),                   
  .LinkFail(LinkFail),                    .r_MAC(r_MAC),                              .WCtrlDataStart(WCtrlDataStart),
  .RStatStart(RStatStart),                .UpdateMIIRX_DATAReg(UpdateMIIRX_DATAReg),  .Prsd(Prsd), 
  .r_TxBDNum(r_TxBDNum),                  .TX_BD_NUM_Wr(TX_BD_NUM_Wr),                .int_o(int_o)
);



wire  [7:0] RxData;
wire        RxValid;
wire        RxStartFrm;
wire        RxEndFrm;

wire        WillTransmit;            // Will transmit (to RxEthMAC)
wire        ResetCollision;          // Reset Collision (for synchronizing collision)
wire  [7:0] TxDataOut;               // Transmit Packet Data (to TxEthMAC)
wire        WillSendControlFrame;
wire        TxCtrlEndFrm;
wire        ReceivedPauseFrm;
wire        ReceiveEnd;
wire        ReceivedPacketGood;
wire        ReceivedLengthOK;

// Connecting MACControl
eth_maccontrol maccontrol1
(
  .MTxClk(mtx_clk_pad_i),                        .TPauseRq(TPauseRq), 
  .TxPauseTV(TxPauseTV),                        .TxDataIn(TxData), 
  .TxStartFrmIn(TxStartFrm),                    .TxEndFrmIn(TxEndFrm), 
  .TxUsedDataIn(TxUsedDataIn),                  .TxDoneIn(TxDoneIn), 
  .TxAbortIn(TxAbortIn),                        .MRxClk(mrx_clk_pad_i), 
  .RxData(RxData),                              .RxValid(RxValid), 
  .RxStartFrm(RxStartFrm),                      .RxEndFrm(RxEndFrm),
  .ReceiveEnd(ReceiveEnd),                      .ReceivedPacketGood(ReceivedPacketGood),
  .PassAll(r_PassAll),                          .TxFlow(r_TxFlow), 
  .RxFlow(r_RxFlow),                            .DlyCrcEn(r_DlyCrcEn),
  .MAC(r_MAC),                                  .PadIn(r_Pad | PerPacketPad), 
  .PadOut(PadOut),                              .CrcEnIn(r_CrcEn | PerPacketCrcEn), 
  .CrcEnOut(CrcEnOut),                          .TxReset(r_Rst), 
  .RxReset(r_Rst),                              .ReceivedLengthOK(ReceivedLengthOK),
  .TxDataOut(TxDataOut),                        .TxStartFrmOut(TxStartFrmOut), 
  .TxEndFrmOut(TxEndFrmOut),                    .TxUsedDataOut(TxUsedData), 
  .TxDoneOut(TxDone),                           .TxAbortOut(TxAbort), 
  .WillSendControlFrame(WillSendControlFrame),  .TxCtrlEndFrm(TxCtrlEndFrm), 
  .ReceivedPauseFrm(ReceivedPauseFrm)
);



wire TxCarrierSense;          // Synchronized CarrierSense (to Tx clock)
wire Collision;               // Synchronized Collision

reg CarrierSense_Tx1;
reg CarrierSense_Tx2;
reg Collision_Tx1;
reg Collision_Tx2;

reg RxEnSync;                 // Synchronized Receive Enable
reg CarrierSense_Rx1;
reg RxCarrierSense;           // Synchronized CarrierSense (to Rx clock)
reg WillTransmit_q;
reg WillTransmit_q2;



// Muxed MII receive data valid
assign MRxDV_Lb = r_LoopBck? mtxen_pad_o : mrxdv_pad_i & RxEnSync;

// Muxed MII Receive Error
assign MRxErr_Lb = r_LoopBck? mtxerr_pad_o : mrxerr_pad_i & RxEnSync;

// Muxed MII Receive Data
assign MRxD_Lb[3:0] = r_LoopBck? mtxd_pad_o[3:0] : mrxd_pad_i[3:0];



// Connecting TxEthMAC
eth_txethmac txethmac1
(
  .MTxClk(mtx_clk_pad_i),             .Reset(r_Rst),                      .CarrierSense(TxCarrierSense), 
  .Collision(Collision),              .TxData(TxDataOut),                 .TxStartFrm(TxStartFrmOut), 
  .TxUnderRun(TxUnderRun),            .TxEndFrm(TxEndFrmOut),             .Pad(PadOut),  
  .MinFL(r_MinFL),                    .CrcEn(CrcEnOut),                   .FullD(r_FullD), 
  .HugEn(r_HugEn),                    .DlyCrcEn(r_DlyCrcEn),              .IPGT(r_IPGT), 
  .IPGR1(r_IPGR1),                    .IPGR2(r_IPGR2),                    .CollValid(r_CollValid), 
  .MaxRet(r_MaxRet),                  .NoBckof(r_NoBckof),                .ExDfrEn(r_ExDfrEn), 
  .MaxFL(r_MaxFL),                    .MTxEn(mtxen_pad_o),                .MTxD(mtxd_pad_o), 
  .MTxErr(mtxerr_pad_o),              .TxUsedData(TxUsedDataIn),          .TxDone(TxDoneIn), 
  .TxRetry(TxRetry),                  .TxAbort(TxAbortIn),                .WillTransmit(WillTransmit), 
  .ResetCollision(ResetCollision)
);




wire  [15:0]  RxByteCnt;
wire          RxByteCntEq0;
wire          RxByteCntGreat2;
wire          RxByteCntMaxFrame;
wire          RxCrcError;
wire          RxStateIdle;
wire          RxStatePreamble;
wire          RxStateSFD;
wire   [1:0]  RxStateData;




// Connecting RxEthMAC
eth_rxethmac rxethmac1
(
  .MRxClk(mrx_clk_pad_i),               .MRxDV(MRxDV_Lb),                     .MRxD(MRxD_Lb),
  .Transmitting(Transmitting),          .HugEn(r_HugEn),                      .DlyCrcEn(r_DlyCrcEn), 
  .MaxFL(r_MaxFL),                      .r_IFG(r_IFG),                        .Reset(r_Rst),
  .RxData(RxData),                      .RxValid(RxValid),                    .RxStartFrm(RxStartFrm), 
  .RxEndFrm(RxEndFrm),                  .CrcHash(),                           .CrcHashGood(), 
  .Broadcast(),                         .Multicast(),                         .ByteCnt(RxByteCnt), 
  .ByteCntEq0(RxByteCntEq0),            .ByteCntGreat2(RxByteCntGreat2),      .ByteCntMaxFrame(RxByteCntMaxFrame), 
  .CrcError(RxCrcError),                .StateIdle(RxStateIdle),              .StatePreamble(RxStatePreamble), 
  .StateSFD(RxStateSFD),                .StateData(RxStateData)
);


// MII Carrier Sense Synchronization
always @ (posedge mtx_clk_pad_i or posedge r_Rst)
begin
  if(r_Rst)
    begin
      CarrierSense_Tx1 <= #Tp 1'b0;
      CarrierSense_Tx2 <= #Tp 1'b0;
    end
  else
    begin
      CarrierSense_Tx1 <= #Tp mcrs_pad_i;
      CarrierSense_Tx2 <= #Tp CarrierSense_Tx1;
    end
end

assign TxCarrierSense = ~r_FullD & CarrierSense_Tx2;


// MII Collision Synchronization
always @ (posedge mtx_clk_pad_i or posedge r_Rst)
begin
  if(r_Rst)
    begin
      Collision_Tx1 <= #Tp 1'b0;
      Collision_Tx2 <= #Tp 1'b0;
    end
  else
    begin
      Collision_Tx1 <= #Tp mcoll_pad_i;
      if(ResetCollision)
        Collision_Tx2 <= #Tp 1'b0;
      else
      if(Collision_Tx1)
        Collision_Tx2 <= #Tp 1'b1;
    end
end


// Synchronized Collision
assign Collision = ~r_FullD & Collision_Tx2;



// Carrier sense is synchronized to receive clock.
always @ (posedge mrx_clk_pad_i or posedge r_Rst)
begin
  if(r_Rst)
    begin
      CarrierSense_Rx1 <= #Tp 1'h0;
      RxCarrierSense <= #Tp 1'h0;
    end
  else
    begin
      CarrierSense_Rx1 <= #Tp mcrs_pad_i;
      RxCarrierSense <= #Tp CarrierSense_Rx1;
    end
end


// Delayed WillTransmit
always @ (posedge mrx_clk_pad_i)
begin
  WillTransmit_q <= #Tp WillTransmit;
  WillTransmit_q2 <= #Tp WillTransmit_q;
end 


assign Transmitting = ~r_FullD & WillTransmit_q2;



// Synchronized Receive Enable
always @ (posedge mrx_clk_pad_i or posedge r_Rst)
begin
  if(r_Rst)
    RxEnSync <= #Tp 1'b0;
  else
  if(~RxCarrierSense | RxCarrierSense & Transmitting)
    RxEnSync <= #Tp r_RxEn;
end 




// Connecting WishboneDMA module
eth_wishbonedma wbdma
(
  .WB_CLK_I(wb_clk_i),                .WB_RST_I(wb_rst_i),                      .WB_DAT_I(wb_dat_i), 
  .WB_DAT_O(DMA_WB_DAT_O), 

  // WISHBONE slave
  .WB_ADR_I(wb_adr_i[9:2]),           .WB_SEL_I(wb_sel_i),                      .WB_WE_I(wb_we_i), 
  .BDCs(BDCs),                        .WB_ACK_O(BDAck), 
  .WB_REQ_O(wb_req_o),                .WB_ACK_I(wb_ack_i),                      .WB_ND_O(wb_nd_o), 
  .WB_RD_O(wb_rd_o), 

    //TX
  .MTxClk(mtx_clk_pad_i),             .TxStartFrm(TxStartFrm),                  .TxEndFrm(TxEndFrm), 
  .TxUsedData(TxUsedData),            .TxData(TxData),                          .StatusIzTxEthMACModula(16'h0), 
  .TxRetry(TxRetry),                  .TxAbort(TxAbort),                        .TxUnderRun(TxUnderRun), 
  .TxDone(TxDone),                    .TPauseRq(TPauseRq),                      .TxPauseTV(TxPauseTV), 
  .PerPacketCrcEn(PerPacketCrcEn),    .PerPacketPad(PerPacketPad),              .WillSendControlFrame(WillSendControlFrame), 
  .TxCtrlEndFrm(TxCtrlEndFrm), 

  // Register
  .r_TxEn(r_TxEn),                    .r_RxEn(r_RxEn),                          .r_TxBDNum(r_TxBDNum), 
  .r_DmaEn(r_DmaEn),                  .TX_BD_NUM_Wr(TX_BD_NUM_Wr), 

  //RX
  .MRxClk(mrx_clk_pad_i),             .RxData(RxData),                          .RxValid(RxValid), 
  .RxStartFrm(RxStartFrm),            .RxEndFrm(RxEndFrm), 
  .Busy_IRQ(Busy_IRQ),                .RxF_IRQ(RxF_IRQ),                        .RxB_IRQ(RxB_IRQ), 
  .TxE_IRQ(TxE_IRQ),                  .TxB_IRQ(TxB_IRQ)

);



// Connecting MacStatus module
eth_macstatus macstatus1 
(
  .MRxClk(mrx_clk_pad_i),              .Reset(r_Rst),                            .TransmitEnd(), 
  .ReceiveEnd(ReceiveEnd),            .ReceivedPacketGood(ReceivedPacketGood),  .ReceivedLengthOK(ReceivedLengthOK), 
  .RxCrcError(RxCrcError),            .MRxErr(MRxErr_Lb),                       .MRxDV(MRxDV_Lb), 
  .RxStateSFD(RxStateSFD),            .RxStateData(RxStateData),                .RxStatePreamble(RxStatePreamble), 
  .RxStateIdle(RxStateIdle),          .Transmitting(Transmitting),              .RxByteCnt(RxByteCnt), 
  .RxByteCntEq0(RxByteCntEq0),        .RxByteCntGreat2(RxByteCntGreat2),        .RxByteCntMaxFrame(RxByteCntMaxFrame), 
  .ReceivedPauseFrm(ReceivedPauseFrm)
);


endmodule