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) begin
if(i_rx_reset == 1'b1) begin
ro_m_axis_data <= 0;
ro_m_axis_keep <= 0;
end else begin
ro_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;
end
end
always @(posedge i_rx_clk) begin
if(i_rx_reset == 1'b1) begin
ro_m_axis_valid <= 0;
end else if(m_axis_valid && m_axis_last) begin
ro_m_axis_valid <= 0;
end else if(r_m_axis_valid) begin
ro_m_axis_valid <= 1'b1;
end else begin
ro_m_axis_valid <= 0;
end
end
always @(posedge i_rx_clk) begin
if(i_rx_reset == 1'b1) begin
ro_m_axis_last <= 0;
end else if(m_axis_valid && m_axis_last) begin
ro_m_axis_last <= 1'b0;
end else if(r_m_axis_last == 1'b1) begin
ro_m_axis_last <= 1'b1;
end
end
always @(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 ;
end
always @(*) begin
if(w_sof_pre||w_eof_pre||w_data_frame) begin
r_i_valid <= 1'b1;
end else begin
r_i_valid <= 1'b0;
end
end
always @(*) begin
if((r_d1_i_valid && r_receiving)||m_axis_last) begin
r_m_axis_valid <= 1'b1;
end else begin
r_m_axis_valid <= 1'b0;
end
end
always @(posedge i_rx_clk) begin
if(i_rx_reset == 1'b1) begin
r_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) begin
r_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) begin
r_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 begin
r_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 ;
end
end
always @(posedge i_rx_clk) begin
if(i_rx_reset == 1'b1) begin
r_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) begin
r_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) begin
r_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 begin
r_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 ;
end
end
assign 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 @(*) begin
if((r_i_rx_header == P_FrameHeader_CONTROL)&&(r_i_rx_headervalid)&&(r_i_rx_data_valid)) begin
case (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;
endcase
end else begin
r_eof_local <= 0;
end
end
always @(*) begin
if((i_rx_header == P_FrameHeader_CONTROL)&&(i_rx_headervalid)&&(i_rx_data_valid)) begin
case (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;
endcase
end else begin
r_eof_local_pre <= 0;
end
end
always @(posedge i_rx_clk) begin
if(i_rx_reset == 1'b1) begin
r_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) begin
r_receiving <= 0;
end else if(r_d1_eof_local == 5 && r_d1_eof == 1'b1) begin
r_receiving <= 0;
end else if(r_d1_eof_local == 4 && r_d1_eof == 1'b1) begin
r_receiving <= 0;
end else if(r_d1_eof_local == 3 && r_d1_eof == 1'b1) begin
r_receiving <= 0;
end else if(r_d1_eof_local == 2 && r_d1_eof == 1'b1) begin
r_receiving <= 0;
end else if(r_eof_local == 1 && w_eof == 1'b1) begin
r_receiving <= 0;
end else if(r_eof_local == 8 && w_eof == 1'b1) begin
r_receiving <= 0;
end else if(w_sof) begin
r_receiving <= 1'b1;
end else begin
r_receiving <= r_receiving;
end
end
always @(*) begin
if(r_d1_eof_local == 7 && r_d1_eof == 1'b1) begin
r_m_axis_last <= 1'b1;
end else if(r_d1_eof_local == 6 && r_d1_eof == 1'b1) begin
r_m_axis_last <= 1'b1;
end else if(r_d1_eof_local == 5 && r_d1_eof == 1'b1) begin
r_m_axis_last <= 1'b1;
end else if(r_d1_eof_local == 4 && r_d1_eof == 1'b1) begin
r_m_axis_last <= 1'b1;
end else if(r_d1_eof_local == 3 && r_d1_eof == 1'b1) begin
r_m_axis_last <= 1'b1;
end else if(r_d1_eof_local == 2 && r_d1_eof == 1'b1) begin
r_m_axis_last <= 1'b1;
end else if(r_eof_local == 1 && w_eof == 1'b1) begin
r_m_axis_last <= 1'b1;
end else if(r_eof_local == 8 && w_eof == 1'b1) begin
r_m_axis_last <= 1'b1;
end else begin
r_m_axis_last <= 1'b0;
end
end
always @(posedge i_rx_clk) begin
if(i_rx_reset == 1'b1) begin
r_m_axis_data <= 0;
end else if(r_eof_local == 7 && w_eof == 1'b1) begin
r_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) begin
r_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) begin
r_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) begin
r_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) begin
r_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) begin
r_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) begin
r_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) begin
r_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) begin
r_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) begin
r_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) begin
r_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) begin
r_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) begin
r_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) begin
r_m_axis_data <= {{8'h0},r_i_rx_data[63-:56]};
end else begin
r_m_axis_data <= {i_rx_data[07:00],r_i_rx_data[63-:56]};
end
end
always @(posedge i_rx_clk) begin
if(i_rx_reset == 1'b1) begin
r_m_axis_keep <= 8'b0000_0000;
end else if(r_eof_local == 7 && w_eof == 1'b1) begin
r_m_axis_keep <= 8'b0011_1111;
end else if(r_eof_local == 6 && w_eof == 1'b1) begin
r_m_axis_keep <= 8'b0001_1111;
end else if(r_eof_local == 5 && w_eof == 1'b1) begin
r_m_axis_keep <= 8'b0000_1111;
end else if(r_eof_local == 4 && w_eof == 1'b1) begin
r_m_axis_keep <= 8'b0000_0111;
end else if(r_eof_local == 3 && w_eof == 1'b1) begin
r_m_axis_keep <= 8'b0000_0011;
end else if(r_eof_local == 2 && w_eof == 1'b1) begin
r_m_axis_keep <= 8'b0000_0001;
end else if(r_eof_local_pre == 1 && w_eof_pre == 1'b1) begin
r_m_axis_keep <= 8'b1111_1111;
end else if(r_eof_local_pre == 8 && w_eof_pre == 1'b1) begin
r_m_axis_keep <= 8'b0111_1111;
end
end
endmodule
View Code
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) begin
if(i_tx_reset == 1'b1) begin
r_o_tx_sequence <= 0;
end else if(r_o_tx_sequence == 'd32) begin
r_o_tx_sequence <= 0;
end else begin
r_o_tx_sequence <= r_o_tx_sequence + 1'b1;
end
end
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) begin
if(i_tx_reset == 1'b1) begin
r_o_tx_header <= 2'b00;
r_o_tx_data <= 0;
end else if(r_st_current == P_ST_FRAMESTART && w_send_valid) begin
r_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) begin
r_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) begin
case (r_s_axis_keep)
8'b1111_1111:begin
r_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:begin
r_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:begin
r_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:begin
r_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:begin
r_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:begin
r_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:begin
r_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:begin
r_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: begin
r_o_tx_header <= P_FrameHeader_CONTROL;
r_o_tx_data <= {{8{7'h16}},P_FLAG_IDLE};
end
endcase
end else if(r_st_current == P_ST_END2) begin
case (r_s_axis_keep)
8'b1111_1111:begin
r_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:begin
r_o_tx_header <= P_FrameHeader_CONTROL;
r_o_tx_data <= {{7{7'h16}},7'b0,P_FLAG_END_0};
end
default: begin
r_o_tx_header <= P_FrameHeader_CONTROL;
r_o_tx_data <= {{8{7'h16}},P_FLAG_IDLE};
end
endcase
end else begin
r_o_tx_header <= P_FrameHeader_CONTROL;
r_o_tx_data <= {{8{7'h16}},P_FLAG_IDLE};
end
end
always @(posedge i_tx_clk) begin
if(i_tx_reset == 1'b1) begin
r1_data_rd_data <= 0;
end else if(w_send_valid) begin
r1_data_rd_data <= w_data_rd_data_conv;
end
end
always @(posedge i_tx_clk) begin
r1_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) begin
if(i_tx_reset == 1'b1) begin
r_data_rd_en <= 1'b0;
end else if(w_send_valid == 1'b1 && r_send_cnt == r_valid_cnt - 1'b1) begin
r_data_rd_en <= 1'b0;
end else if(r_st_current == P_ST_FRAMESTART) begin
r_data_rd_en <= 1'b1;
end else begin
r_data_rd_en <= r_data_rd_en;
end
end
always @(posedge i_tx_clk) begin
if(i_tx_reset == 1'b1) begin
r_send_cnt <= 0;
end else if(w_send_valid == 1'b1 && r_send_cnt == r_valid_cnt - 1'b1) begin
r_send_cnt <= 0;
end else if(w_send_valid == 1'b1) begin
r_send_cnt <= r_send_cnt + 1'b1;
end
end
always @(posedge i_tx_clk) begin
if(i_tx_reset == 1'b1) begin
r_valid_cnt <= 0;
end else if(w_send_valid == 1'b1 && r_send_cnt == r_valid_cnt - 1'b1) begin
r_valid_cnt <= 0;
end else if(w_data_wr_en == 1'b1) begin
r_valid_cnt <= r_valid_cnt + 1'b1;
end else begin
r_valid_cnt <= r_valid_cnt;
end
end
always @(posedge i_tx_clk) begin
if(i_tx_reset == 1'b1) begin
r_st_current <= P_ST_INIT;
end else begin
r_st_current <= r_st_next;
end
end
always @(*) begin
case (r_st_current)
P_ST_INIT:begin
r_st_next <= P_ST_IDLE;
end
P_ST_IDLE:begin
if(r3_w_data_wr_en == 1) begin
r_st_next <= P_ST_FRAMESTART;
end else begin
r_st_next <= P_ST_IDLE;
end
end
P_ST_FRAMESTART:begin
if(w_send_valid) begin
r_st_next <= P_ST_DATALOADS;
end else begin
r_st_next <= P_ST_FRAMESTART;
end
end
P_ST_DATALOADS:begin
if(w_send_valid == 1'b1 && r_send_cnt == r_valid_cnt - 2 ) begin
r_st_next <= P_ST_END1;
end else begin
r_st_next <= P_ST_DATALOADS;
end
end
P_ST_END1:begin
if(w_send_valid) begin
case (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;
endcase
end else begin
r_st_next <= P_ST_END1;
end
end
P_ST_END2:begin
r_st_next <= P_ST_IDLE;
end
default:begin
r_st_next <= P_ST_INIT;
end
endcase
end
always @(posedge i_tx_clk) begin
if(i_tx_reset == 1'b1) begin
r_s_axis_keep <= 0;
end else if(s_axis_last) begin
r_s_axis_keep <= s_axis_keep;
end
end
always @(posedge i_tx_clk) begin
if(i_tx_reset == 1'b1) begin
r_s_axis_ready <= 1'b1;
end else if(s_axis_last) begin
r_s_axis_ready <= 1'b0;
end else if(r_st_current == P_ST_IDLE) begin
r_s_axis_ready <= 1'b1;
end else begin
r_s_axis_ready <= r_s_axis_ready;
end
end
endmodule
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标签：00,64b,自定义,Aurora,localparam,wire,data,reg,axis From： https://www.cnblogs.com/VerweileDoch/p/18346835