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  • This comparison shows the changes necessary to convert path
    /qaz_libs/trunk/axi4_stream_lib
    from Rev 45 to Rev 49
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Rev 45 → Rev 49

/sim/src/legacy/tb_axis_register_slice.sv
0,0 → 1,159
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2015 Authors and OPENCORES.ORG ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
 
 
module tb_top();
 
// --------------------------------------------------------------------
// test bench clock & reset
wire clk_200mhz;
wire tb_clk = clk_200mhz;
wire tb_rst;
wire aclk = tb_clk;
wire aresetn = ~tb_rst;
 
tb_base #( .PERIOD(5_000) ) tb( clk_200mhz, tb_rst );
 
 
// --------------------------------------------------------------------
//
localparam TILES = 1;
localparam WIDTH = 32; // tile width
localparam HEIGHT = 16; // tile height
localparam OUTPUTS_PER_TILE = 1; // outputs per tile
localparam BYTES_PER_PIXEL = 2;
localparam BITS_PER_PIXEL = 16;
localparam VERTICAL_BLANKING = 20;
 
 
// --------------------------------------------------------------------
//
localparam AVF_N = BYTES_PER_PIXEL * OUTPUTS_PER_TILE; // data bus width in bytes
localparam AVF_U = 1; // TUSER width
 
axis_if #(.N(AVF_N), .U(AVF_U)) axis_in[TILES](.*);
axis_if #(.N(AVF_N), .U(AVF_U)) axis_out[TILES](.*);
 
 
// --------------------------------------------------------------------
//
axis_register_slice #(.N(AVF_N), .U(AVF_U))
dut
(
.axis_en(1'b1),
.axis_in(axis_in.slave[0]),
.axis_out(axis_out.master[0]),
.*
);
// --------------------------------------------------------------------
//
import axis_video_frame_bfm_pkg::*;
import avf_agent_class_pkg::*;
 
 
// --------------------------------------------------------------------
//
avf_agent_config_class avf_agent_config_h;
avf_agent_class #(BYTES_PER_PIXEL, OUTPUTS_PER_TILE) avf_agent_h;
 
initial
begin
 
avf_agent_config_h = new
(
.width(WIDTH),
.height(HEIGHT),
.bytes_per_pixel(BYTES_PER_PIXEL),
.bits_per_pixel(BITS_PER_PIXEL),
.tiles(TILES),
.outputs_per_tile(OUTPUTS_PER_TILE),
.name("AVF_"),
.vertical_blanking(VERTICAL_BLANKING)
);
 
avf_agent_config_h.tile[0].direction = RIGHT_DOWN;
 
avf_agent_h = new
(
.avf_agent_config(avf_agent_config_h),
.avf_axis_in_if(axis_out),
.avf_axis_out_if(axis_in)
);
 
avf_agent_h.init();
 
end
 
 
// --------------------------------------------------------------------
// sim models
// | | | | | | | | | | | | | | | | |
// \|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/
// ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
 
// --------------------------------------------------------------------
//
 
 
// ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
// /|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\
// | | | | | | | | | | | | | | | | |
// sim models
// --------------------------------------------------------------------
 
 
// --------------------------------------------------------------------
// debug wires
for(genvar j = 0; j < TILES; j++)
axis_video_debug #(BYTES_PER_PIXEL, OUTPUTS_PER_TILE) avf_debug(axis_out[j]);
 
 
// --------------------------------------------------------------------
// test
the_test test( tb_clk, tb_rst );
 
initial
begin
 
test.run_the_test();
 
$display("^^^---------------------------------");
$display("^^^ %16.t | Testbench done.", $time);
$display("^^^---------------------------------");
 
$display("^^^---------------------------------");
 
$stop();
 
end
 
endmodule
 
 
 
/sim/src/legacy/tb_axis_to_axi4_agent_class_pkg.sv
0,0 → 1,158
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2015 Authors and OPENCORES.ORG ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
 
 
package tb_axis_to_axi4_agent_class_pkg;
 
// --------------------------------------------------------------------
//
import axi4_memory_pkg::*;
import axis_bfm_pkg::*;
 
 
// --------------------------------------------------------------------
//
class tb_axis_to_axi4_agent_class #(N, A, I, D, U);
 
axi4_memory_class #(A, N, I) m_h;
axis_tx_bfm_class #(N, I, D, U) s_h;
memory_tr_class #(A, N, I) m_tr_h;
axis_tr_class #(N, I, D, U) s_tr_h;
 
virtual axi4_if #(.A(A), .N(N), .I(I)) axi4_m;
virtual axis_if #(.N(N), .I(I), .D(D), .U(U)) axis_in;
 
mailbox #(memory_tr_class #(A, N, I)) q;
 
 
// --------------------------------------------------------------------
//
task wait_for_sof;
@(posedge axis_in.cb_s.tuser);
$display("^^^ %16.t | %m", $time);
endtask: wait_for_sof
 
 
// --------------------------------------------------------------------
//
task wait_for_dma_done(int bvalid_count);
repeat(bvalid_count)
@(axi4_m.cb_s iff axi4_m.cb_m.bvalid & axi4_m.cb_s.bready);
$display("^^^ %16.t | %m", $time);
endtask: wait_for_dma_done
 
 
// --------------------------------------------------------------------
//
task random_transaction(int addr, int size, int stride);
m_h.clear_all();
m_tr_h = new();
m_tr_h.random(addr, size);
q.put(m_tr_h);
 
$display("^^^ %16.t | %m | m_tr_h.data.size = %x", $time, m_tr_h.data.size);
for(int i = 0; i < m_tr_h.data.size; i += N)
begin
s_tr_h = new();
for(int k = 0; k < N; k++)
begin
s_tr_h.tdata[k*8 +: 8] = m_tr_h.data[i + k];
end
 
if(i == 0)
s_tr_h.tuser = 'b1;
else
s_tr_h.tuser = 'b0;
 
if(i + N < m_tr_h.data.size)
s_tr_h.tlast = 1'b0;
else
s_tr_h.tlast = 1'b1;
 
s_h.q.put(s_tr_h);
end
 
wait_for_dma_done(size / stride);
endtask: random_transaction
 
 
// --------------------------------------------------------------------
//
task automatic compare(int offset);
byte data[];
 
$display("^^^ %16.t | %m", $time);
$display("^^^ %16.t | q.num = %d", $time, q.num);
$display("^^^ %16.t | s_h.q.num = %d", $time, s_h.q.num);
$display("^^^ %16.t | m_tr_h.data.size = %d", $time, m_tr_h.data.size);
 
if(q.try_get(m_tr_h) == 0)
begin
$display("!!! %16.t | ERROR!!! try_get(m_tr_h) == 0", $time);
$stop;
end
 
data = new[m_tr_h.data.size];
m_h.dump_words(offset, data);
 
foreach(m_tr_h.data[i])
if(data[i] != m_tr_h.data[i])
begin
$display("!!! %16.t | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^", $time);
$display("!!! %16.t | %x ", $time, i);
$display("!!! %16.t | %x | %x |", $time, data[i], m_tr_h.data[i]);
$stop;
end
 
$display("^^^ %16.t | %m | done!", $time);
 
endtask: compare
 
 
//--------------------------------------------------------------------
//
function new
(
virtual axi4_if #(.A(A), .N(N), .I(I)) axi4_m,
virtual axis_if #(.N(N), .I(I), .D(D), .U(U)) axis_in
);
 
this.axi4_m = axi4_m;
this.axis_in = axis_in;
m_h = new(axi4_m);
s_h = new(axis_in);
q = new();
endfunction: new
 
 
// --------------------------------------------------------------------
//
endclass: tb_axis_to_axi4_agent_class
 
// --------------------------------------------------------------------
//
endpackage: tb_axis_to_axi4_agent_class_pkg
/sim/src/legacy/tb_axis_upsizer.sv
0,0 → 1,144
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2015 Authors and OPENCORES.ORG ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
 
 
module tb_top();
 
// --------------------------------------------------------------------
// test bench clock & reset
wire clk_200mhz;
wire tb_clk = clk_200mhz;
wire tb_rst;
 
tb_base #(.PERIOD(5_000)) tb(clk_200mhz, tb_rst);
 
 
// --------------------------------------------------------------------
//
wire tb_rst_s;
wire aclk = tb_clk;
wire aresetn = ~tb_rst_s;
 
sync_reset
sync_reset_i(aclk, tb_rst, tb_rst_s);
 
 
// --------------------------------------------------------------------
//
import tb_axis_upsizer_class_pkg::*;
 
 
// --------------------------------------------------------------------
//
axis_if #(.N(AVF_N), .U(AVF_U)) axis_in(.*);
axis_if #(.N(AVF_N * S), .U(AVF_U * S)) axis_out(.*);
 
 
// --------------------------------------------------------------------
//
axis_upsizer
#(
.N(AVF_N), // data bus width in bytes
.I(1), // TID width
.D(1), // TDEST width
.U(AVF_U), // TUSER width
.S(S), // tdata size multiplier
.USE_TSTRB(0), // set to 1 to enable, 0 to disable
.USE_TKEEP(0), // set to 1 to enable, 0 to disable
.BYTES_PER_TUSER(0) // bytes per tuser bit. Set to 0 for transfer based.
)
dut(.*);
 
 
// --------------------------------------------------------------------
// sim models
// | | | | | | | | | | | | | | | | |
// \|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/
// ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
 
// --------------------------------------------------------------------
//
axis_checker #(.N(AVF_N * S), .I(1), .D(1), .U(AVF_U))
axis_checker_i(.*);
 
 
// --------------------------------------------------------------------
//
axis_if #(.N(AVF_N * S), .U(AVF_U)) avf_axis_in_if(.*);
 
assign axis_out.tready = avf_axis_in_if.tready;
assign avf_axis_in_if.tvalid = axis_out.tvalid;
assign avf_axis_in_if.tdata = axis_out.tdata;
assign avf_axis_in_if.tuser = {axis_out.tuser[(AVF_U*S)-1], axis_out.tuser[1:0]};
assign avf_axis_in_if.tlast = axis_out.tlast;
 
 
// --------------------------------------------------------------------
//
tb_axis_upsizer_class a_h;
 
initial
a_h = new(.avf_axis_in_if(avf_axis_in_if), .avf_axis_out_if(axis_in));
 
 
// --------------------------------------------------------------------
//
 
// ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
// /|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\-/|\
// | | | | | | | | | | | | | | | | |
// sim models
// --------------------------------------------------------------------
 
 
// --------------------------------------------------------------------
// debug wires
 
 
// --------------------------------------------------------------------
// test
the_test test( tb_clk, tb_rst );
 
initial
begin
 
test.run_the_test();
 
$display("^^^---------------------------------");
$display("^^^ %16.t | Testbench done.", $time);
$display("^^^---------------------------------");
 
$display("^^^---------------------------------");
 
$stop();
 
end
 
endmodule
 
 
 
/sim/src/legacy/tb_axis_upsizer_agent_class_pkg.sv
0,0 → 1,129
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2015 Authors and OPENCORES.ORG ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
 
 
package tb_axis_upsizer_agent_class_pkg;
 
// --------------------------------------------------------------------
//
import video_frame_pkg::*;
import axis_video_frame_bfm_pkg::*;
 
 
// --------------------------------------------------------------------
//
class tb_axis_upsizer_agent_class #(BYTES_PER_PIXEL, OUTPUTS_PER_TILE, AVF_N, AVF_U, S);
 
virtual axis_if #(.N(AVF_N * S), .U(AVF_U)) avf_axis_in_if;
virtual axis_if #(.N(AVF_N), .U(AVF_U)) avf_axis_out_if;
 
avf_config_class c_h;
 
avf_tx_class #(BYTES_PER_PIXEL, OUTPUTS_PER_TILE, AVF_U) tx_h;
avf_rx_class #(BYTES_PER_PIXEL, OUTPUTS_PER_TILE * S, AVF_U) rx_h;
 
video_frame_class clone_h;
video_frame_class sent_f_h;
video_frame_class rx_f_h;
 
mailbox #(video_frame_class) q;
 
 
// --------------------------------------------------------------------
//
virtual task
queue_frame
(
string pattern = "",
int pixel = 0
);
 
if(pattern != "")
tx_h.make_frame(pattern, pixel);
 
clone_h = tx_h.tx_bfm_h[0].f_h.clone();
tx_h.tx_bfm_h[0].put(clone_h);
q.put(clone_h);
 
$display("^^^ %16.t | %m | using %s pattern", $time, pattern);
 
endtask: queue_frame
 
 
// --------------------------------------------------------------------
//
virtual task automatic
compare_frame;
 
int mismatch_count;
 
$display("^^^ %16.t | %m", $time);
 
q.get(sent_f_h);
rx_h.rx_bfm_h[0].get(rx_f_h);
mismatch_count = sent_f_h.compare(8, rx_f_h);
 
endtask: compare_frame
 
 
//--------------------------------------------------------------------
//
function void init(avf_config_class in_c_h, avf_config_class out_c_h);
 
rx_h = new(in_c_h, '{avf_axis_in_if});
tx_h = new(out_c_h, '{avf_axis_out_if});
 
this.q = new();
 
endfunction: init
 
 
//--------------------------------------------------------------------
//
function new
(
virtual axis_if #(.N(AVF_N * S), .U(AVF_U)) avf_axis_in_if,
virtual axis_if #(.N(AVF_N), .U(AVF_U)) avf_axis_out_if
);
 
this.avf_axis_in_if = avf_axis_in_if;
this.avf_axis_out_if = avf_axis_out_if;
endfunction: new
 
 
// --------------------------------------------------------------------
//
endclass: tb_axis_upsizer_agent_class
 
// --------------------------------------------------------------------
//
endpackage: tb_axis_upsizer_agent_class_pkg
 
 
 
 
 
/sim/src/legacy/tb_axis_upsizer_class_pkg.sv
0,0 → 1,114
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2015 Authors and OPENCORES.ORG ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
 
 
package tb_axis_upsizer_class_pkg;
 
// --------------------------------------------------------------------
//
import axis_video_frame_bfm_pkg::*;
import tb_axis_upsizer_agent_class_pkg::*;
 
 
// --------------------------------------------------------------------
//
localparam WIDTH = 32; // tile width
localparam HEIGHT = 16; // tile height
localparam OUTPUTS_PER_TILE = 1; // outputs per tile
localparam BYTES_PER_PIXEL = 2;
localparam BITS_PER_PIXEL = 16;
localparam VERTICAL_BLANKING = 20;
 
localparam S = 4; // tdata size multiplier
localparam AVF_N = BYTES_PER_PIXEL * OUTPUTS_PER_TILE; // data bus width in bytes
localparam AVF_U = 3; // TUSER width
 
 
// --------------------------------------------------------------------
//
class tb_axis_upsizer_class
extends tb_axis_upsizer_agent_class #(BYTES_PER_PIXEL, OUTPUTS_PER_TILE, AVF_N, AVF_U, S);
 
avf_config_class in_c_h;
avf_config_class out_c_h;
avf_tile_config_t tile_config[];
 
 
//--------------------------------------------------------------------
//
function new
(
virtual axis_if #(.N(AVF_N * S), .U(AVF_U)) avf_axis_in_if,
virtual axis_if #(.N(AVF_N), .U(AVF_U)) avf_axis_out_if
);
 
super.new(avf_axis_in_if, avf_axis_out_if);
 
this.tile_config = new[1];
this.tile_config[0].direction = RIGHT_DOWN;
 
this.in_c_h = new
(
.width(WIDTH),
.height(HEIGHT),
.bytes_per_pixel(BYTES_PER_PIXEL),
.bits_per_pixel(BITS_PER_PIXEL),
.pixels_per_clk(OUTPUTS_PER_TILE * S),
.name("IN_"),
.vertical_blanking(VERTICAL_BLANKING),
.tile(tile_config)
);
 
this.out_c_h = new
(
.width(WIDTH),
.height(HEIGHT),
.bytes_per_pixel(BYTES_PER_PIXEL),
.bits_per_pixel(BITS_PER_PIXEL),
.pixels_per_clk(OUTPUTS_PER_TILE),
.name("OUT_"),
.vertical_blanking(VERTICAL_BLANKING),
.tile(tile_config)
);
 
super.init(in_c_h, out_c_h);
 
endfunction: new
 
 
// --------------------------------------------------------------------
//
endclass: tb_axis_upsizer_class
 
// --------------------------------------------------------------------
//
endpackage: tb_axis_upsizer_class_pkg
 
 
 
 
 
/src/axis_down_shift.sv
0,0 → 1,178
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2019 Authors and OPENCORES.ORG ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
 
// --------------------------------------------------------------------
module
axis_down_shift_tuser_mux
#(
U = 1, // TUSER width
logic [U-1:0] TUSER_MASK[3] = '{ {U{1'b0}}, // first
{U{1'b0}}, // middle
{U{1'b0}} } // last
)
(
axis_if axis_in,
axis_if axis_out,
input aclk,
input aresetn
);
 
// --------------------------------------------------------------------
endmodule
 
// --------------------------------------------------------------------
module
axis_down_shift
#(
N, // axis_in tdata bus width in bytes
S, // tdata size divisor
I = 1, // TID width
D = 1, // TDEST width
U = 1, // TUSER width
logic [U-1:0] TUSER_MASK[3] = '{ {U{1'b0}}, // first
{U{1'b0}}, // middle
{U{1'b0}} } // last
)
(
axis_if axis_in,
axis_if axis_out,
input aclk,
input aresetn
);
 
// --------------------------------------------------------------------
// synthesis translate_off
initial
begin
assert(S > 1) else $fatal;
assert(N % S == 0) else $fatal;
end
// synthesis translate_on
// --------------------------------------------------------------------
 
// --------------------------------------------------------------------
localparam N_OUT = (N / S); // width of axis_out.tdata in bytes
localparam W = N_OUT * 8; // width of axis_out.tdata in bits
localparam UB = (W*(S-1))-1;
 
// --------------------------------------------------------------------
axis_if #(.N(N_OUT), .I(I), .D(D), .U(U)) a_down(.*);
wire almost_last;
 
// --------------------------------------------------------------------
enum reg [2:0]
{
FIRST = 3'b001,
MIDDLE = 3'b010,
LAST = 3'b100
} state, next_state;
 
// --------------------------------------------------------------------
always_ff @(posedge aclk)
if(~aresetn)
state <= FIRST;
else
state <= next_state;
 
// --------------------------------------------------------------------
always_comb
case(state)
FIRST: if(axis_in.tvalid & a_down.tready)
if(almost_last)
next_state <= LAST;
else
next_state <= MIDDLE;
else
next_state <= FIRST;
 
MIDDLE: if(almost_last & a_down.tready)
next_state <= LAST;
else
next_state <= MIDDLE;
 
LAST: if(a_down.tready)
next_state <= FIRST;
else
next_state <= LAST;
 
default: next_state <= FIRST;
endcase
 
// --------------------------------------------------------------------
reg [$clog2(S)-1:0] index;
assign almost_last = (index >= S - 2);
 
always_ff @(posedge aclk)
if(next_state == FIRST)
index <= 0;
else if(a_down.tready)
index <= index + 1;
 
// --------------------------------------------------------------------
reg [UB:0] remainder;
wire [W-1:0] tdata_pass = axis_in.tdata[W-1:0];
wire [W-1:0] tdata_shift = remainder[W-1:0];
 
always_ff @(posedge aclk)
if(state == FIRST)
remainder <= axis_in.tdata[(N*8)-1:W];
else if(a_down.tready)
remainder <= { {W{1'b0}}, remainder[UB:W]};
 
// --------------------------------------------------------------------
reg [U-1:0] tuser;
 
generate
for(genvar j = 0; j < U; j++)
begin: tuser_gen
always_comb
case(state)
FIRST: tuser[j] = TUSER_MASK[0][j] ? axis_in.tuser[j] : 0;
MIDDLE: tuser[j] = TUSER_MASK[1][j] ? axis_in.tuser[j] : 0;
LAST: tuser[j] = TUSER_MASK[2][j] ? axis_in.tuser[j] : 0;
default: tuser[j] = 0;
endcase
end
endgenerate
 
// --------------------------------------------------------------------
assign axis_in.tready = (state == LAST) & (next_state != LAST);
// assign a_down.tstrb = axis_in.tstrb;
// assign a_down.tkeep = axis_in.tkeep;
assign a_down.tid = axis_in.tid;
assign a_down.tdest = axis_in.tdest;
assign a_down.tvalid = axis_in.tvalid;
assign a_down.tlast = (state == LAST) ? axis_in.tlast : 0;
assign a_down.tuser = tuser;
assign a_down.tdata = (state == FIRST) ? tdata_pass : tdata_shift;
 
// --------------------------------------------------------------------
axis_register_slice #(.N(N_OUT), .I(I), .D(D), .U(U))
slice_i(.axis_in(a_down), .*);
 
// --------------------------------------------------------------------
endmodule
/src/axis_fanout.sv
0,0 → 1,110
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2019 Authors and OPENCORES.ORG ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
 
module
axis_fanout #(F)
(
axis_if axis_in,
axis_if axis_out[F],
input aclk,
input aresetn
);
 
// --------------------------------------------------------------------
wire [F-1:0] handshake;
wire [F-1:0] stalled;
reg [F-1:0] transfer_stalled;
wire [F-1:0] out_tready;
wire all_ready = &out_tready;
wire [F-1:0] done;
wire all_done = &done;
 
// --------------------------------------------------------------------
enum reg [1:0]
{
FANOUT = 2'b01,
STALL = 2'b10
} state, next_state;
 
// --------------------------------------------------------------------
always_ff @(posedge aclk)
if(~aresetn)
state <= FANOUT;
else
state <= next_state;
 
// --------------------------------------------------------------------
always_comb
case(state)
FANOUT: if(~axis_in.tvalid)
next_state = FANOUT;
else if(all_ready)
next_state = FANOUT;
else
next_state = STALL;
 
STALL: if(all_done)
next_state = FANOUT;
else
next_state = STALL;
 
default: next_state = FANOUT;
endcase
 
// --------------------------------------------------------------------
generate
for(genvar j = 0; j < F; j++)
begin: tready_gen
// --------------------------------------------------------------------
assign handshake[j] = axis_in.tvalid & axis_out[j].tready;
assign stalled[j] = axis_in.tvalid & ~axis_out[j].tready;
assign done[j] = ~transfer_stalled[j] | handshake[j];
 
always_ff @(posedge aclk)
if(handshake[j])
transfer_stalled[j] <= 0;
else if(stalled[j])
transfer_stalled[j] <= 1;
 
// --------------------------------------------------------------------
assign out_tready[j] = axis_out[j].tready;
assign axis_out[j].tlast = axis_in.tlast;
assign axis_out[j].tuser = axis_in.tuser;
assign axis_out[j].tdata = axis_in.tdata;
assign axis_out[j].tstrb = axis_in.tstrb;
assign axis_out[j].tkeep = axis_in.tkeep;
assign axis_out[j].tid = axis_in.tid;
assign axis_out[j].tdest = axis_in.tdest;
assign axis_out[j].tvalid = (state == FANOUT) ? axis_in.tvalid : transfer_stalled[j];
end
endgenerate
 
// --------------------------------------------------------------------
assign axis_in.tready = (state == FANOUT) ? all_ready : (next_state == FANOUT);
 
// --------------------------------------------------------------------
endmodule

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