mirror of
https://github.com/alexforencich/verilog-ethernet.git
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238 lines
6.9 KiB
Verilog
238 lines
6.9 KiB
Verilog
/*
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Copyright (c) 2015-2018 Alex Forencich
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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// Language: Verilog 2001
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`timescale 1ns / 1ps
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/*
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* AXI4-Stream frame length adjuster with FIFO
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*/
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module axis_frame_length_adjust_fifo #
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(
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// Width of AXI stream interfaces in bits
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parameter DATA_WIDTH = 8,
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// Propagate tkeep signal
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// If disabled, tkeep assumed to be 1'b1
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parameter KEEP_ENABLE = (DATA_WIDTH>8),
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// tkeep signal width (words per cycle)
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parameter KEEP_WIDTH = (DATA_WIDTH/8),
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// Propagate tid signal
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parameter ID_ENABLE = 0,
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// tid signal width
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parameter ID_WIDTH = 8,
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// Propagate tdest signal
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parameter DEST_ENABLE = 0,
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// tdest signal width
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parameter DEST_WIDTH = 8,
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// Propagate tuser signal
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parameter USER_ENABLE = 1,
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// tuser signal width
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parameter USER_WIDTH = 1,
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// Depth of data FIFO in words
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parameter FRAME_FIFO_DEPTH = 4096,
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// Depth of header FIFO
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parameter HEADER_FIFO_DEPTH = 8
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)
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(
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input wire clk,
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input wire rst,
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/*
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* AXI input
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*/
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input wire [DATA_WIDTH-1:0] s_axis_tdata,
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input wire [KEEP_WIDTH-1:0] s_axis_tkeep,
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input wire s_axis_tvalid,
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output wire s_axis_tready,
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input wire s_axis_tlast,
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input wire [ID_WIDTH-1:0] s_axis_tid,
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input wire [DEST_WIDTH-1:0] s_axis_tdest,
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input wire [USER_WIDTH-1:0] s_axis_tuser,
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/*
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* AXI output
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*/
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output wire m_axis_hdr_valid,
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input wire m_axis_hdr_ready,
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output wire m_axis_hdr_pad,
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output wire m_axis_hdr_truncate,
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output wire [15:0] m_axis_hdr_length,
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output wire [15:0] m_axis_hdr_original_length,
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output wire [DATA_WIDTH-1:0] m_axis_tdata,
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output wire [KEEP_WIDTH-1:0] m_axis_tkeep,
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output wire m_axis_tvalid,
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input wire m_axis_tready,
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output wire m_axis_tlast,
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output wire [ID_WIDTH-1:0] m_axis_tid,
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output wire [DEST_WIDTH-1:0] m_axis_tdest,
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output wire [USER_WIDTH-1:0] m_axis_tuser,
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/*
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* Configuration
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*/
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input wire [15:0] length_min,
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input wire [15:0] length_max
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);
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wire [DATA_WIDTH-1:0] fifo_axis_tdata;
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wire [KEEP_WIDTH-1:0] fifo_axis_tkeep;
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wire fifo_axis_tvalid;
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wire fifo_axis_tready;
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wire fifo_axis_tlast;
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wire [ID_WIDTH-1:0] fifo_axis_tid;
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wire [DEST_WIDTH-1:0] fifo_axis_tdest;
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wire [USER_WIDTH-1:0] fifo_axis_tuser;
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wire status_valid;
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wire status_ready;
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wire status_frame_pad;
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wire status_frame_truncate;
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wire [15:0] status_frame_length;
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wire [15:0] status_frame_original_length;
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axis_frame_length_adjust #(
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.DATA_WIDTH(DATA_WIDTH),
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.KEEP_ENABLE(KEEP_ENABLE),
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.KEEP_WIDTH(KEEP_WIDTH),
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.ID_ENABLE(ID_ENABLE),
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.ID_WIDTH(ID_WIDTH),
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.DEST_ENABLE(DEST_ENABLE),
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.DEST_WIDTH(DEST_WIDTH),
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.USER_ENABLE(USER_ENABLE),
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.USER_WIDTH(USER_WIDTH)
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)
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axis_frame_length_adjust_inst (
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.clk(clk),
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.rst(rst),
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// AXI input
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.s_axis_tdata(s_axis_tdata),
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.s_axis_tkeep(s_axis_tkeep),
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.s_axis_tvalid(s_axis_tvalid),
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.s_axis_tready(s_axis_tready),
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.s_axis_tlast(s_axis_tlast),
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.s_axis_tid(s_axis_tid),
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.s_axis_tdest(s_axis_tdest),
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.s_axis_tuser(s_axis_tuser),
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// AXI output
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.m_axis_tdata(fifo_axis_tdata),
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.m_axis_tkeep(fifo_axis_tkeep),
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.m_axis_tvalid(fifo_axis_tvalid),
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.m_axis_tready(fifo_axis_tready),
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.m_axis_tlast(fifo_axis_tlast),
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.m_axis_tid(fifo_axis_tid),
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.m_axis_tdest(fifo_axis_tdest),
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.m_axis_tuser(fifo_axis_tuser),
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// Status
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.status_valid(status_valid),
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.status_ready(status_ready),
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.status_frame_pad(status_frame_pad),
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.status_frame_truncate(status_frame_truncate),
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.status_frame_length(status_frame_length),
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.status_frame_original_length(status_frame_original_length),
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// Configuration
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.length_min(length_min),
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.length_max(length_max)
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);
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axis_fifo #(
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.DEPTH(FRAME_FIFO_DEPTH),
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.DATA_WIDTH(DATA_WIDTH),
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.KEEP_ENABLE(KEEP_ENABLE),
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.KEEP_WIDTH(KEEP_WIDTH),
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.LAST_ENABLE(1),
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.ID_ENABLE(ID_ENABLE),
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.ID_WIDTH(ID_WIDTH),
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.DEST_ENABLE(DEST_ENABLE),
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.DEST_WIDTH(DEST_WIDTH),
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.USER_ENABLE(USER_ENABLE),
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.USER_WIDTH(USER_WIDTH),
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.FRAME_FIFO(0)
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)
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frame_fifo_inst (
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.clk(clk),
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.rst(rst),
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// AXI input
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.s_axis_tdata(fifo_axis_tdata),
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.s_axis_tkeep(fifo_axis_tkeep),
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.s_axis_tvalid(fifo_axis_tvalid),
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.s_axis_tready(fifo_axis_tready),
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.s_axis_tlast(fifo_axis_tlast),
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.s_axis_tid(fifo_axis_tid),
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.s_axis_tdest(fifo_axis_tdest),
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.s_axis_tuser(fifo_axis_tuser),
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// AXI output
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.m_axis_tdata(m_axis_tdata),
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.m_axis_tkeep(m_axis_tkeep),
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.m_axis_tvalid(m_axis_tvalid),
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.m_axis_tready(m_axis_tready),
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.m_axis_tlast(m_axis_tlast),
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.m_axis_tid(m_axis_tid),
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.m_axis_tdest(m_axis_tdest),
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.m_axis_tuser(m_axis_tuser),
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// Status
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.status_overflow(),
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.status_bad_frame(),
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.status_good_frame()
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);
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axis_fifo #(
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.DEPTH(HEADER_FIFO_DEPTH),
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.DATA_WIDTH(1+1+16+16),
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.KEEP_ENABLE(0),
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.LAST_ENABLE(0),
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.ID_ENABLE(0),
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.DEST_ENABLE(0),
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.USER_ENABLE(0),
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.FRAME_FIFO(0)
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)
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header_fifo_inst (
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.clk(clk),
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.rst(rst),
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// AXI input
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.s_axis_tdata({status_frame_pad, status_frame_truncate, status_frame_length, status_frame_original_length}),
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.s_axis_tkeep(0),
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.s_axis_tvalid(status_valid),
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.s_axis_tready(status_ready),
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.s_axis_tlast(0),
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.s_axis_tid(0),
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.s_axis_tdest(0),
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.s_axis_tuser(0),
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// AXI output
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.m_axis_tdata({m_axis_hdr_pad, m_axis_hdr_truncate, m_axis_hdr_length, m_axis_hdr_original_length}),
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.m_axis_tkeep(),
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.m_axis_tvalid(m_axis_hdr_valid),
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.m_axis_tready(m_axis_hdr_ready),
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.m_axis_tlast(),
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.m_axis_tid(),
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.m_axis_tdest(),
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.m_axis_tuser(),
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// Status
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.status_overflow(),
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.status_bad_frame(),
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.status_good_frame()
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);
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endmodule
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