相较于8/10来说没那么复杂，需要考虑的情况只有八种；
但是gearbox的控制需要额外的心思：每三十二周期所有操作都需要停止；
这一点在收发都需要注意；
RX：
核心思想是利用header做检测，将夹杂在数据流中的控制包滤除掉；
module gt_phy_rx (input wire i_rx_clk ,input wire i_rx_reset ,input wire [63:00] i_rx_data ,input wire i_rx_data_valid ,input wire [01:00] i_rx_header ,input wire i_rx_headervalid ,output wire m_axis_valid ,output wire m_axis_last ,output wire [63:00] m_axis_data ,output wire [07:00] m_axis_keep ,input wire m_axis_ready );localparam P_FrameHeader_CONTROL = 2'b10;localparam P_FrameHeader_DATA = 2'b01;localparam P_FLAG_START = 8'h71;localparam P_FLAG_END_0 = 8'h8E;localparam P_FLAG_END_1 = 8'h99;localparam P_FLAG_END_2 = 8'hA5;localparam P_FLAG_END_3 = 8'hB2;localparam P_FLAG_END_4 = 8'hC3;localparam P_FLAG_END_5 = 8'hD4;localparam P_FLAG_END_6 = 8'hE8;localparam P_FLAG_END_7 = 8'hFF; reg [63:00] r_i_rx_data ;reg r_i_rx_data_valid ;reg [01:00] r_i_rx_header ;reg r_i_rx_headervalid ;reg [63:00] r_d1_i_rx_data ;reg r_d1_i_rx_data_valid ;reg [01:00] r_d1_i_rx_header ;reg r_d1_i_rx_headervalid ;reg [63:00] r_d2_i_rx_data ;reg r_d2_i_rx_data_valid ;reg [01:00] r_d2_i_rx_header ;reg r_d2_i_rx_headervalid ;reg r_receiving ;reg r_m_axis_valid ;reg r_m_axis_last ;reg r_d1_m_axis_last ;reg [63:00] r_m_axis_data ;reg [07:00] r_m_axis_keep ;reg ro_m_axis_valid ;reg ro_m_axis_last ;reg [63:00] ro_m_axis_data ;reg [07:00] ro_m_axis_keep ;wire w_data_frame ;wire w_sof ;wire w_sof_pre ;wire w_eof ;wire w_eof_pre ;reg r_d1_eof ;reg [07:00] r_eof_local ;reg [07:00] r_eof_local_pre ;reg [07:00] r_d1_eof_local ;reg [07:00] r_d2_eof_local ;reg r_i_valid ;reg r_d1_i_valid ;assign m_axis_valid = ro_m_axis_valid; assign m_axis_last = ro_m_axis_last ; assign m_axis_data = ro_m_axis_data ; assign m_axis_keep = ro_m_axis_keep ; always @(posedge i_rx_clk) beginif(i_rx_reset == 1'b1) beginro_m_axis_data <= 0;ro_m_axis_keep <= 0;end else beginro_m_axis_data <= (r_m_axis_valid)?{r_m_axis_data[07:00],r_m_axis_data[15:08],r_m_axis_data[23:16],r_m_axis_data[31:24],r_m_axis_data[39:32],r_m_axis_data[47:40],r_m_axis_data[55:48],r_m_axis_data[63:56]}:0;ro_m_axis_keep <= (r_m_axis_valid)?{r_m_axis_keep[0],r_m_axis_keep[1],r_m_axis_keep[2],r_m_axis_keep[3],r_m_axis_keep[4],r_m_axis_keep[5],r_m_axis_keep[6],r_m_axis_keep[7]}:0;endendalways @(posedge i_rx_clk) beginif(i_rx_reset == 1'b1) beginro_m_axis_valid <= 0;end else if(m_axis_valid && m_axis_last) beginro_m_axis_valid <= 0;end else if(r_m_axis_valid) beginro_m_axis_valid <= 1'b1;end else beginro_m_axis_valid <= 0;endendalways @(posedge i_rx_clk) beginif(i_rx_reset == 1'b1) beginro_m_axis_last <= 0;end else if(m_axis_valid && m_axis_last) beginro_m_axis_last <= 1'b0;end else if(r_m_axis_last == 1'b1) beginro_m_axis_last <= 1'b1; endendalways @(posedge i_rx_clk) begin r_d1_i_valid <= r_i_valid ;r_d1_eof_local <= r_eof_local ;r_d1_eof <= w_eof ;r_d1_m_axis_last <= r_m_axis_last ;endalways @(*) beginif(w_sof_pre||w_eof_pre||w_data_frame) beginr_i_valid <= 1'b1;end else beginr_i_valid <= 1'b0; endendalways @(*) beginif((r_d1_i_valid && r_receiving)||m_axis_last) beginr_m_axis_valid <= 1'b1;end else beginr_m_axis_valid <= 1'b0; endendalways @(posedge i_rx_clk) beginif(i_rx_reset == 1'b1) beginr_i_rx_data <= 0;r_i_rx_data_valid <= 0;r_i_rx_header <= 0;r_i_rx_headervalid <= 0;end else if(m_axis_last == 1'b1) beginr_i_rx_data <= 0;r_i_rx_data_valid <= 0;r_i_rx_header <= 0;r_i_rx_headervalid <= 0; end else if(r_i_valid) beginr_i_rx_data <= i_rx_data ;r_i_rx_data_valid <= i_rx_data_valid ;r_i_rx_header <= i_rx_header ;r_i_rx_headervalid <= i_rx_headervalid ;end else beginr_i_rx_data <= r_i_rx_data ;r_i_rx_data_valid <= r_i_rx_data_valid ;r_i_rx_header <= r_i_rx_header ;r_i_rx_headervalid <= r_i_rx_headervalid ;endendalways @(posedge i_rx_clk) beginif(i_rx_reset == 1'b1) beginr_d1_i_rx_data <= 0;r_d1_i_rx_data_valid <= 0;r_d1_i_rx_header <= 0;r_d1_i_rx_headervalid <= 0;end else if(m_axis_last) beginr_d1_i_rx_data <= 0;r_d1_i_rx_data_valid <= 0;r_d1_i_rx_header <= 0;r_d1_i_rx_headervalid <= 0;end else if(r_d1_i_valid) beginr_d1_i_rx_data <= r_i_rx_data ;r_d1_i_rx_data_valid <= r_i_rx_data_valid ;r_d1_i_rx_header <= r_i_rx_header ;r_d1_i_rx_headervalid <= r_i_rx_headervalid ;end else beginr_d1_i_rx_data <= r_d1_i_rx_data ;r_d1_i_rx_data_valid <= r_d1_i_rx_data_valid ;r_d1_i_rx_header <= r_d1_i_rx_header ;r_d1_i_rx_headervalid <= r_d1_i_rx_headervalid ;endendassign w_data_frame = (i_rx_header == P_FrameHeader_DATA)&&(i_rx_headervalid)&&(i_rx_data_valid);assign w_sof = (r_i_rx_header == P_FrameHeader_CONTROL)&&(r_i_rx_headervalid)&&(r_i_rx_data_valid)&&(r_i_rx_data[07:00] == P_FLAG_START);assign w_sof_pre = (i_rx_header == P_FrameHeader_CONTROL)&&(i_rx_headervalid)&&(i_rx_data_valid)&&(i_rx_data[07:00] == P_FLAG_START);assign w_eof = (r_i_rx_header == P_FrameHeader_CONTROL)&&(r_i_rx_headervalid)&&(r_i_rx_data_valid)&&((r_i_rx_data[07:00] == P_FLAG_END_0 )|| (r_i_rx_data[07:00] == P_FLAG_END_1 )||(r_i_rx_data[07:00] == P_FLAG_END_2 )|| (r_i_rx_data[07:00] == P_FLAG_END_3 )|| (r_i_rx_data[07:00] == P_FLAG_END_4 )|| (r_i_rx_data[07:00] == P_FLAG_END_5 )|| (r_i_rx_data[07:00] == P_FLAG_END_6 )|| (r_i_rx_data[07:00] == P_FLAG_END_7 ));assign w_eof_pre = (i_rx_header == P_FrameHeader_CONTROL)&&(i_rx_headervalid)&&(i_rx_data_valid)&&((i_rx_data[07:00] == P_FLAG_END_0 )|| (i_rx_data[07:00] == P_FLAG_END_1 )||(i_rx_data[07:00] == P_FLAG_END_2 )|| (i_rx_data[07:00] == P_FLAG_END_3 )|| (i_rx_data[07:00] == P_FLAG_END_4 )|| (i_rx_data[07:00] == P_FLAG_END_5 )|| (i_rx_data[07:00] == P_FLAG_END_6 )|| (i_rx_data[07:00] == P_FLAG_END_7 ));always @(*) beginif((r_i_rx_header == P_FrameHeader_CONTROL)&&(r_i_rx_headervalid)&&(r_i_rx_data_valid)) begincase (r_i_rx_data[07:00])P_FLAG_END_0:r_eof_local <= 8;P_FLAG_END_1:r_eof_local <= 1;P_FLAG_END_2:r_eof_local <= 2;P_FLAG_END_3:r_eof_local <= 3;P_FLAG_END_4:r_eof_local <= 4;P_FLAG_END_5:r_eof_local <= 5;P_FLAG_END_6:r_eof_local <= 6;P_FLAG_END_7:r_eof_local <= 7;default: r_eof_local <= 0;endcaseend else beginr_eof_local <= 0;endendalways @(*) beginif((i_rx_header == P_FrameHeader_CONTROL)&&(i_rx_headervalid)&&(i_rx_data_valid)) begincase (i_rx_data[07:00])P_FLAG_END_0:r_eof_local_pre <= 8;P_FLAG_END_1:r_eof_local_pre <= 1;P_FLAG_END_2:r_eof_local_pre <= 2;P_FLAG_END_3:r_eof_local_pre <= 3;P_FLAG_END_4:r_eof_local_pre <= 4;P_FLAG_END_5:r_eof_local_pre <= 5;P_FLAG_END_6:r_eof_local_pre <= 6;P_FLAG_END_7:r_eof_local_pre <= 7;default: r_eof_local_pre <= 0;endcaseend else beginr_eof_local_pre <= 0;endendalways @(posedge i_rx_clk) beginif(i_rx_reset == 1'b1) beginr_receiving <= 0;end else if(r_d1_eof_local == 7 && r_d1_eof == 1'b1) begin r_receiving <= 0;end else if(r_d1_eof_local == 6 && r_d1_eof == 1'b1) beginr_receiving <= 0;end else if(r_d1_eof_local == 5 && r_d1_eof == 1'b1) beginr_receiving <= 0;end else if(r_d1_eof_local == 4 && r_d1_eof == 1'b1) beginr_receiving <= 0;end else if(r_d1_eof_local == 3 && r_d1_eof == 1'b1) beginr_receiving <= 0;end else if(r_d1_eof_local == 2 && r_d1_eof == 1'b1) beginr_receiving <= 0;end else if(r_eof_local == 1 && w_eof == 1'b1) beginr_receiving <= 0;end else if(r_eof_local == 8 && w_eof == 1'b1) beginr_receiving <= 0;end else if(w_sof) beginr_receiving <= 1'b1;end else beginr_receiving <= r_receiving;endendalways @(*) beginif(r_d1_eof_local == 7 && r_d1_eof == 1'b1) beginr_m_axis_last <= 1'b1;end else if(r_d1_eof_local == 6 && r_d1_eof == 1'b1) beginr_m_axis_last <= 1'b1;end else if(r_d1_eof_local == 5 && r_d1_eof == 1'b1) beginr_m_axis_last <= 1'b1;end else if(r_d1_eof_local == 4 && r_d1_eof == 1'b1) beginr_m_axis_last <= 1'b1;end else if(r_d1_eof_local == 3 && r_d1_eof == 1'b1) beginr_m_axis_last <= 1'b1;end else if(r_d1_eof_local == 2 && r_d1_eof == 1'b1) beginr_m_axis_last <= 1'b1;end else if(r_eof_local == 1 && w_eof == 1'b1) beginr_m_axis_last <= 1'b1;end else if(r_eof_local == 8 && w_eof == 1'b1) beginr_m_axis_last <= 1'b1;end else beginr_m_axis_last <= 1'b0; endendalways @(posedge i_rx_clk) beginif(i_rx_reset == 1'b1) beginr_m_axis_data <= 0;end else if(r_eof_local == 7 && w_eof == 1'b1) beginr_m_axis_data <= {{2{8'h0}},r_i_rx_data[63-:48]};end else if(r_eof_local_pre == 7 && w_eof_pre == 1'b1) beginr_m_axis_data <= {i_rx_data[15:08],r_i_rx_data[63-:56]};end else if(r_eof_local == 6 && w_eof == 1'b1) beginr_m_axis_data <= {{3{8'h0}},r_i_rx_data[55-:40]};end else if(r_eof_local_pre == 6 && w_eof_pre == 1'b1) beginr_m_axis_data <= {i_rx_data[15:08],r_i_rx_data[63-:56]};end else if(r_eof_local == 5 && w_eof == 1'b1) beginr_m_axis_data <= {{4{8'h0}},r_i_rx_data[47-:32]};end else if(r_eof_local_pre == 5 && w_eof_pre == 1'b1) beginr_m_axis_data <= {i_rx_data[15:08],r_i_rx_data[63-:56]};end else if(r_eof_local == 4 && w_eof == 1'b1) beginr_m_axis_data <= {{5{8'h0}},r_i_rx_data[39-:24]};end else if(r_eof_local_pre == 4 && w_eof_pre == 1'b1) beginr_m_axis_data <= {i_rx_data[15:08],r_i_rx_data[63-:56]};end else if(r_eof_local == 3 && w_eof == 1'b1) beginr_m_axis_data <= {{6{8'h0}},r_i_rx_data[31-:16]};end else if(r_eof_local_pre == 3 && w_eof_pre == 1'b1) beginr_m_axis_data <= {i_rx_data[15:08],r_i_rx_data[63-:56]};end else if(r_eof_local == 2 && w_eof == 1'b1) beginr_m_axis_data <= {{7{8'h0}},r_i_rx_data[23-:08]};end else if(r_eof_local_pre == 2 && w_eof_pre == 1'b1) beginr_m_axis_data <= {i_rx_data[15:08],r_i_rx_data[63-:56]};end else if(r_eof_local_pre == 1 && w_eof_pre == 1'b1) beginr_m_axis_data <= {i_rx_data[15:08],r_i_rx_data[63-:56]};end else if(r_eof_local_pre == 8 && w_eof_pre == 1'b1) beginr_m_axis_data <= {{8'h0},r_i_rx_data[63-:56]};end else beginr_m_axis_data <= {i_rx_data[07:00],r_i_rx_data[63-:56]};endendalways @(posedge i_rx_clk) beginif(i_rx_reset == 1'b1) beginr_m_axis_keep <= 8'b0000_0000;end else if(r_eof_local == 7 && w_eof == 1'b1) beginr_m_axis_keep <= 8'b0011_1111;end else if(r_eof_local == 6 && w_eof == 1'b1) beginr_m_axis_keep <= 8'b0001_1111;end else if(r_eof_local == 5 && w_eof == 1'b1) beginr_m_axis_keep <= 8'b0000_1111;end else if(r_eof_local == 4 && w_eof == 1'b1) beginr_m_axis_keep <= 8'b0000_0111;end else if(r_eof_local == 3 && w_eof == 1'b1) beginr_m_axis_keep <= 8'b0000_0011;end else if(r_eof_local == 2 && w_eof == 1'b1) beginr_m_axis_keep <= 8'b0000_0001;end else if(r_eof_local_pre == 1 && w_eof_pre == 1'b1) beginr_m_axis_keep <= 8'b1111_1111;end else if(r_eof_local_pre == 8 && w_eof_pre == 1'b1) beginr_m_axis_keep <= 8'b0111_1111; endendendmodule
TX：
只需要在gearbox需要暂停的时候停止即可；
module gt_phy_tx (input wire i_tx_clk ,input wire i_tx_reset ,output wire [63:00] o_tx_data , output wire [01:00] o_tx_header , output wire [06:00] o_tx_sequence , input wire s_axis_valid ,input wire s_axis_last ,input wire [63:00] s_axis_data ,input wire [07:00] s_axis_keep ,output wire s_axis_ready );localparam P_FrameHeader_CONTROL = 2'b10;localparam P_FrameHeader_DATA = 2'b01;localparam P_FLAG_IDLE = 8'h17;localparam P_FLAG_START = 8'h71;localparam P_FLAG_END_0 = 8'h8E;localparam P_FLAG_END_1 = 8'h99;localparam P_FLAG_END_2 = 8'hA5;localparam P_FLAG_END_3 = 8'hB2;localparam P_FLAG_END_4 = 8'hC3;localparam P_FLAG_END_5 = 8'hD4;localparam P_FLAG_END_6 = 8'hE8;localparam P_FLAG_END_7 = 8'hFF;localparam P_ST_INIT = 1;localparam P_ST_IDLE = 2;localparam P_ST_FRAMESTART = 3;localparam P_ST_DATALOADS = 4;localparam P_ST_END1 = 5;localparam P_ST_END2 = 6;reg r_s_axis_ready ;reg r_s_axis_valid ;reg [07:00] r_s_axis_keep ;reg [07:00] r_st_current ; reg [07:00] r_st_next ; reg r1_w_data_wr_en ;reg r2_w_data_wr_en ; reg r3_w_data_wr_en ; reg [15:00] r_valid_cnt ;wire w_data_wr_en ; wire [63:00] w_data_wr_data ;reg r_data_rd_en ;wire [63:00] w_data_rd_data ;wire [63:00] w_data_rd_data_conv ;reg [63:00] r1_data_rd_data ;reg [63:00] r2_data_rd_data ;wire w_full ;wire w_empty ;wire [09:00] w_data_count ;reg [05:00] r_o_tx_sequence ;wire w_sequence_check ;wire w_send_valid ;reg [15:00] r_send_cnt ;reg [01:00] r_o_tx_header ; reg [63:00] r_o_tx_data ;assign w_data_wr_data = s_axis_data;assign w_data_wr_en = (s_axis_valid)&&(s_axis_ready);assign w_data_rd_data_conv = {w_data_rd_data[07-:8],w_data_rd_data[15-:8],w_data_rd_data[23-:8],w_data_rd_data[31-:8],w_data_rd_data[39-:8],w_data_rd_data[47-:8],w_data_rd_data[55-:8],w_data_rd_data[63-:8]};assign o_tx_sequence = {1'b0,r_o_tx_sequence[05:00]};assign o_tx_header = r_o_tx_header;assign o_tx_data = r_o_tx_data;assign s_axis_ready = r_s_axis_ready;assign w_sequence_check = r_o_tx_sequence == 31;assign w_send_valid = (r_data_rd_en)&&(!w_sequence_check);always @(posedge i_tx_clk) beginif(i_tx_reset == 1'b1) beginr_o_tx_sequence <= 0;end else if(r_o_tx_sequence == 'd32) beginr_o_tx_sequence <= 0;end else beginr_o_tx_sequence <= r_o_tx_sequence + 1'b1; endend Gt_txfifo Gt_txfifo (.clk ( i_tx_clk ), // input wire clk.srst ( i_tx_reset ), // input wire srst.din ( w_data_wr_data ), // input wire [63 : 0] din.wr_en ( w_data_wr_en ), // input wire wr_en.rd_en ( w_send_valid ), // input wire rd_en.dout ( w_data_rd_data ), // output wire [63 : 0] dout.full ( w_full ), // output wire full.empty ( w_empty ), // output wire empty.data_count ( w_data_count ) // output wire [9 : 0] data_count );always @(posedge i_tx_clk) beginif(i_tx_reset == 1'b1) beginr_o_tx_header <= 2'b00;r_o_tx_data <= 0;end else if(r_st_current == P_ST_FRAMESTART && w_send_valid) beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {w_data_rd_data_conv[55:0],P_FLAG_START};end else if(r_st_current == P_ST_DATALOADS && w_send_valid) beginr_o_tx_header <= P_FrameHeader_DATA;r_o_tx_data <= {w_data_rd_data_conv[55:0],r1_data_rd_data[63-:8]};end else if(r_st_current == P_ST_END1 && w_send_valid) begincase (r_s_axis_keep)8'b1111_1111:beginr_o_tx_header <= P_FrameHeader_DATA;r_o_tx_data <= {w_data_rd_data_conv[55:00],r1_data_rd_data[63-:8]};end 8'b1111_1110:beginr_o_tx_header <= P_FrameHeader_DATA;r_o_tx_data <= {w_data_rd_data_conv[55:00],r1_data_rd_data[63-:8]};end 8'b1111_1100:beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {w_data_rd_data_conv[47:00],r1_data_rd_data[63-:8],P_FLAG_END_7};end 8'b1111_1000:beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {{1{7'h16}},1'b0,w_data_rd_data_conv[39:00],r1_data_rd_data[63-:8],P_FLAG_END_6};end 8'b1111_0000:beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {{2{7'h16}},2'b0,w_data_rd_data_conv[31:00],r1_data_rd_data[63-:8],P_FLAG_END_5};end 8'b1110_0000:beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {{3{7'h16}},3'b0,w_data_rd_data_conv[23:00],r1_data_rd_data[63-:8],P_FLAG_END_4};end 8'b1100_0000:beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {{4{7'h16}},4'b0,w_data_rd_data_conv[15:00],r1_data_rd_data[63-:8],P_FLAG_END_3};end 8'b1000_0000:beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {{5{7'h16}},5'b0,w_data_rd_data_conv[07:00],r1_data_rd_data[63-:8],P_FLAG_END_2};end default: beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {{8{7'h16}},P_FLAG_IDLE}; end endcaseend else if(r_st_current == P_ST_END2) begincase (r_s_axis_keep)8'b1111_1111:beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {{6{7'h16}},6'b0,r1_data_rd_data[63-:8],P_FLAG_END_1};end 8'b1111_1110:beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {{7{7'h16}},7'b0,P_FLAG_END_0};end default: beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {{8{7'h16}},P_FLAG_IDLE}; end endcaseend else beginr_o_tx_header <= P_FrameHeader_CONTROL;r_o_tx_data <= {{8{7'h16}},P_FLAG_IDLE}; endend always @(posedge i_tx_clk) beginif(i_tx_reset == 1'b1) beginr1_data_rd_data <= 0;end else if(w_send_valid) beginr1_data_rd_data <= w_data_rd_data_conv;endend always @(posedge i_tx_clk) beginr1_w_data_wr_en <= w_data_wr_en;r2_w_data_wr_en <= r1_w_data_wr_en;r3_w_data_wr_en <= r2_w_data_wr_en;r2_data_rd_data <= r1_data_rd_data;end always @(posedge i_tx_clk) beginif(i_tx_reset == 1'b1) beginr_data_rd_en <= 1'b0;end else if(w_send_valid == 1'b1 && r_send_cnt == r_valid_cnt - 1'b1) beginr_data_rd_en <= 1'b0;end else if(r_st_current == P_ST_FRAMESTART) beginr_data_rd_en <= 1'b1;end else beginr_data_rd_en <= r_data_rd_en;endend always @(posedge i_tx_clk) beginif(i_tx_reset == 1'b1) beginr_send_cnt <= 0;end else if(w_send_valid == 1'b1 && r_send_cnt == r_valid_cnt - 1'b1) beginr_send_cnt <= 0;end else if(w_send_valid == 1'b1) beginr_send_cnt <= r_send_cnt + 1'b1; endend always @(posedge i_tx_clk) beginif(i_tx_reset == 1'b1) beginr_valid_cnt <= 0;end else if(w_send_valid == 1'b1 && r_send_cnt == r_valid_cnt - 1'b1) beginr_valid_cnt <= 0;end else if(w_data_wr_en == 1'b1) beginr_valid_cnt <= r_valid_cnt + 1'b1;end else beginr_valid_cnt <= r_valid_cnt;endendalways @(posedge i_tx_clk) beginif(i_tx_reset == 1'b1) beginr_st_current <= P_ST_INIT; end else beginr_st_current <= r_st_next;endend always @(*) begincase (r_st_current)P_ST_INIT:beginr_st_next <= P_ST_IDLE;end P_ST_IDLE:beginif(r3_w_data_wr_en == 1) beginr_st_next <= P_ST_FRAMESTART;end else beginr_st_next <= P_ST_IDLE;endendP_ST_FRAMESTART:beginif(w_send_valid) beginr_st_next <= P_ST_DATALOADS;end else beginr_st_next <= P_ST_FRAMESTART;endendP_ST_DATALOADS:beginif(w_send_valid == 1'b1 && r_send_cnt == r_valid_cnt - 2 ) beginr_st_next <= P_ST_END1;end else beginr_st_next <= P_ST_DATALOADS;endendP_ST_END1:beginif(w_send_valid) begincase (r_s_axis_keep)8'b1111_1111: r_st_next <= P_ST_END2;8'b1111_1110: r_st_next <= P_ST_END2;8'b1111_1100: r_st_next <= P_ST_IDLE;8'b1111_1000: r_st_next <= P_ST_IDLE;8'b1111_0000: r_st_next <= P_ST_IDLE;8'b1110_0000: r_st_next <= P_ST_IDLE;8'b1100_0000: r_st_next <= P_ST_IDLE;8'b1000_0000: r_st_next <= P_ST_IDLE;default: r_st_next <= P_ST_INIT;endcaseend else beginr_st_next <= P_ST_END1;endendP_ST_END2:beginr_st_next <= P_ST_IDLE;enddefault:beginr_st_next <= P_ST_INIT;endendcaseend always @(posedge i_tx_clk) beginif(i_tx_reset == 1'b1) beginr_s_axis_keep <= 0;end else if(s_axis_last) beginr_s_axis_keep <= s_axis_keep;endend always @(posedge i_tx_clk) beginif(i_tx_reset == 1'b1) beginr_s_axis_ready <= 1'b1;end else if(s_axis_last) beginr_s_axis_ready <= 1'b0;end else if(r_st_current == P_ST_IDLE) beginr_s_axis_ready <= 1'b1;end else beginr_s_axis_ready <= r_s_axis_ready;endend endmodule
