调试LATTICE 的SGMII的调试。

              最近调试lattice 的sgmii接口。 项目最初的架构大概是这样的，用于调试。

     FPGA这边的架构，就是 Tri_mac 转为 sgmii，然后再通过pcs出去。其实sgmii核自带了一个pcs核，最坑人的是PCS必须是外部时钟，最后没有办法只能自己生成一个pcs核和sgmii核对接起来。由于MDIO，我们这边没有去使用。使用的是强制输出。我调试了两天才发现可能是交换机这边设置可能有问题，这边使用的 BCM56634，一开始也不熟悉，最后去请教了别人才把自动连接把它关了。然后ok了。我把交换机芯片这边的配置如下：

 

最后附上我serdes这边的代码;

`timescale 1ns/100ps

module top_hb (

	// G/MII Interface
	data_in_mii,
	en_in_mii,
	err_in_mii,

	data_out_mii,
	dv_out_mii,
	err_out_mii,
	col_out_mii,
	crs_out_mii,

	// GB Timing References
	in_clk_125,
	in_ce_sink,
	in_ce_source,
	out_clk_125,
	out_ce_sink,
	out_ce_source,

	// SERIAL GMII Interface 
	refclkp,
	refclkn,
	hdinp0, 
	hdinn0, 
	hdoutp0, 
	hdoutn0,

	// Control Interface
	gbe_mode,
	sgmii_mode,
	rst_n,

	// Host Bus
	hclk,
	hcs_n,
	hwrite_n,
	haddr,
	hdatain,

	hdataout,
	hready_n,
	
	//Debug Port
	debug_link_timer_short,
	mr_an_complete
	);



// I/O Declarations
input		rst_n;		// System Reset, Active Low
input		hclk;
input           gbe_mode ;      // GBE Mode       (0=SGMII  1=GBE)
input           sgmii_mode ;    // SGMII PCS Mode (0=MAC    1=PHY)

input		in_clk_125 ;    // GMII Input Data Path clock 125Mhz
input		in_ce_sink ;
output		in_ce_source ;
input [7:0]	data_in_mii;	// G/MII Incoming Data
input		en_in_mii;	// G/MII Incoming Data Valid
input		err_in_mii;	// G/MII Incoming Error

input		out_clk_125 ;    // GMII Output Data Path clock 125Mhz
input		out_ce_sink ;
output		out_ce_source ;
output [7:0]	data_out_mii;	// G/MII Outgoing Data
output		dv_out_mii; 	// G/MII Outgoing Data Valid
output		err_out_mii;	// G/MII Outgoing Error
output		col_out_mii;	// G/MII Collision Detect 
output		crs_out_mii;	// G/MII Carrier Sense Detect 

input		refclkp;
input		refclkn;
// exemplar attribute refclkp NOPAD true
// exemplar attribute refclkn NOPAD true

input		hdinp0;		// Incoming SGMII (on SERDES)
input		hdinn0;		// Incoming SGMII (on SERDES)
// exemplar attribute hdinp0 NOPAD true
// exemplar attribute hdinn0 NOPAD true

output		hdoutp0;	// Outgoing SGMII (on SERDES)
output		hdoutn0;	// Outgoing SGMII (on SERDES)
// exemplar attribute hdoutp0 NOPAD true
// exemplar attribute hdoutn0 NOPAD true

input           hcs_n;
input           hwrite_n;
input    [5:0]  haddr;
input    [7:0]  hdatain;

output   [7:0]  hdataout;
output          hready_n;

input	        debug_link_timer_short;
output          mr_an_complete;

// Primary G/MII Outputs -- Latched Before Leaving FPGA
reg [7:0]	data_out_mii;
reg		dv_out_mii;
reg		err_out_mii;
reg		col_out_mii;
reg		crs_out_mii;

// G/MII Signals from input latches to SGMII channel
reg [7:0]	data_buf2chan;
reg		en_buf2chan;
reg		err_buf2chan;

// G/MII Signals from SGMII channel to output latches
wire [7:0]	data_chan2buf;
wire 		dv_chan2buf;
wire 		err_chan2buf;
wire 		col_chan2buf;
wire 		crs_chan2buf;

//  8-bit Interface Signals from SGMII channel to QuadPCS/SERDES
wire [7:0]	data_chan2quad;
wire 		kcntl_chan2quad;
wire 		disparity_cntl_chan2quad;
wire 		xmit_autoneg;

//  8-bit Interface Signals from QuadPCS/SERDES to SGMII channel
wire [7:0]	data_quad2chan;
wire		kcntl_quad2chan;
wire		disp_err_quad2chan;
wire		cv_err_quad2chan;
wire		link_status;
wire		serdes_recovered_clk;
wire		refclk2fpga;

// Misc Signals
wire mdin;
wire mdout;
wire mdout_en;

wire mr_an_enable;
wire mr_restart_an;
wire [15:0] mr_adv_ability;

wire mr_an_complete;
wire mr_page_rx;
wire [15:0] mr_lp_adv_ability;
wire mr_main_reset;
wire mr_loopback_enable;
wire [1:0] mr_speed_selection;
wire mr_power_down;
wire mr_isolate;
wire mr_duplex_mode;
wire mr_col_test;
wire mr_unidir_enable;
wire an_link_ok;

wire debug_link_timer_short;
wire [1:0] operational_rate;

wire tx_pll_lol;
wire rx_cdr_lol;
wire quad_rst;
wire tx_pcs_rst;
wire rx_pcs_rst;
wire rx_serdes_rst;

wire nc_1;
wire nc_2;
wire nc_3;

//  Active High Reset
wire 		rst;
///assign rst = ~rst_n;

// Instantiate Global Reset Controller
//GSR GSR_INST	(.GSR(rst_n));
//PUR PUR_INST	(.PUR(1'b1));


tx_reset_sm   tx_reset_sm (
	.rst_n (rst_n), 
	.refclkdiv2 (in_clk_125), 

	.tx_pll_lol_qd_s (tx_pll_lol),

	.rst_qd_c (quad_rst),
	.tx_pcs_rst_ch_c ({nc_3, nc_2, nc_1, tx_pcs_rst})
	);



// Buffer Incoming MII Data at Primary I/O
always @(posedge in_clk_125 or negedge rst_n)
begin
	if (rst_n == 1'b0) begin
		data_buf2chan <= 8'd0;
		en_buf2chan <= 0;
		err_buf2chan <= 0;
	end
	else begin
		data_buf2chan <= data_in_mii;
		en_buf2chan <= en_in_mii;
		err_buf2chan <= err_in_mii;
	end
end 

// Buffer Outgoing MII Data at Primary I/O
always @(posedge out_clk_125 or negedge rst_n)
begin
	if (rst_n == 1'b0) begin
		data_out_mii <= 8'd0;
		dv_out_mii <= 0;
		err_out_mii <= 0;
		col_out_mii <= 0;
		crs_out_mii <= 0;
	end
	else begin
		data_out_mii <= data_chan2buf;
		dv_out_mii <= dv_chan2buf;
		err_out_mii <= err_chan2buf;
		col_out_mii <= col_chan2buf;
		crs_out_mii <= crs_chan2buf;
	end
end 


/*
// Control Interface
input         rst_n ;
input         signal_detect ;
input         gbe_mode ;
input         sgmii_mode ;
input [1:0]   operational_rate ;
input         debug_link_timer_short ;
input         force_isolate ;
input         force_loopback ;
input         force_unidir ;
 */
 

// Instantiate SGMII IP Core
sgmii u1_dut (
	// Clock and Reset
	.rst_n (rst_n ),
	.tx_clk_125 (in_clk_125),
	.tx_clock_enable_sink (in_ce_sink),
	.tx_clock_enable_source (in_ce_source),
	.rx_clk_125 (),
	.rx_clock_enable_sink (),
	.rx_clock_enable_source (),

	// Control  
	.gbe_mode (1'b0),
	.sgmii_mode (1'b0),  //
	.debug_link_timer_short (1'b0), 
	.force_isolate (1'b0), 
	.force_loopback (1'b0), 
	.force_unidir (1'b0), ////
	.operational_rate (2'b10),
	.rx_compensation_err (),
	.ctc_drop_flag (),
	.ctc_add_flag (),
	.an_link_ok (an_link_ok),


	// (G)MII TX Port
	.tx_d (data_buf2chan),
	.tx_en (en_buf2chan),
	.tx_er (err_buf2chan),

	// (G)MII RX Port
	.rx_d (),
	.rx_dv (),
	.rx_er (),
	.col (),
	.crs (),
                  
	// 8BI TX Port
	.tx_data (data_chan2quad),
	.tx_kcntl (kcntl_chan2quad),
	.tx_disparity_cntl (disparity_cntl_chan2quad),

	// 8BI RX Port
	.signal_detect (),
	.serdes_recovered_clk (),
	.rx_data (),
	.rx_kcntl (),
	.rx_even (1'b0), // Signal Not Used in Normal Mode
	.rx_disp_err (),
	.rx_cv_err (),
	.rx_err_decode_mode (1'b0), // 0= Normal Mode, always tie low for SC Familiy
	.xmit_autoneg (xmit_autoneg),

	// Management Interface  I/O
	.mr_adv_ability (16'h4001),
	.mr_an_enable (1'b0), 
	.mr_main_reset (1'b0),  
	.mr_restart_an (1'b0),   

	.mr_an_complete (mr_an_complete),   
	.mr_lp_adv_ability (mr_lp_adv_ability), 
	.mr_page_rx (mr_page_rx)
	);


// Host Bus Register Interface for SGMII IP Core
// (G)MII Rate Resolution for SGMII IP Core

// QUAD ASB 8B10B + SERDES



////单端晶振

 pcs u_pcs(
// serdes clk pins //
  .hdoutp_ch0(hdoutp0), 
  .hdoutn_ch0(hdoutn0),
  .rxiclk_ch0(), 
  .txiclk_ch0(in_clk_125), 
  .rx_full_clk_ch0( ),
  .rx_half_clk_ch0( ),
  .tx_full_clk_ch0( ),
  .tx_half_clk_ch0( ),
  .txdata_ch0(data_chan2quad), 
  .tx_k_ch0(kcntl_chan2quad),
  .xmit_ch0(xmit_autoneg), 
  .tx_disp_correct_ch0(disparity_cntl_chan2quad),
  .rxdata_ch0(), 
  .rx_k_ch0(),
  .rx_disp_err_ch0(),
  .rx_cv_err_ch0(),
  .sb_felb_ch0_c(1'b0),
  .sb_felb_rst_ch0_c(1'b0),
  .tx_pwrup_ch0_c(1'b1),
  .rx_pwrup_ch0_c(1'b1),           
  .rx_los_low_ch0_s(),
  .lsm_status_ch0_s(), 
  .rx_cdr_lol_ch0_s(),
  .tx_pcs_rst_ch0_c(tx_pcs_rst),
  .rst_qd_c(quad_rst),


///// misc
  .fpga_txrefclk(in_clk_125),
  .tx_serdes_rst_c(1'b0),         ///quad_rst
  .tx_pll_lol_qd_s(tx_pll_lol),
  .serdes_rst_qd_c(1'b0));



/*
pcs_top u_pcs(
                .rstn (rst_n),
//                refclkp,
//                refclkn,

                .txdata_ch0(data_chan2quad),
                .tx_k_ch0(kcntl_chan2quad), 
                .hdoutp_ch0(hdoutp0),
                .hdoutn_ch0(hdoutn0),

 




              .clk_pcs(in_clk_125)

 );
 */
endmodule

以上是top_hb.v这个文件的代码。希望对大家有用。