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//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2017 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_switch
#(
N, // data bus width in bytes
I = 1, // TID width
D = 1, // TDEST width
U = 1 // TUSER width
)
(
input select,
axis_if axis_in,
axis_if axis_out[1:0],
input aclk,
input aresetn
);
// --------------------------------------------------------------------
//
axis_if #(.N(N), .I(I), .D(D), .U(U)) axis_fanout[1:0](.*);
// --------------------------------------------------------------------
//
assign axis_fanout[0].tdata = axis_in.tdata;
assign axis_fanout[0].tstrb = axis_in.tstrb;
assign axis_fanout[0].tkeep = axis_in.tkeep;
assign axis_fanout[0].tlast = axis_in.tlast;
assign axis_fanout[0].tid = axis_in.tid;
assign axis_fanout[0].tdest = axis_in.tdest;
assign axis_fanout[0].tuser = axis_in.tuser;
// --------------------------------------------------------------------
//
assign axis_fanout[1].tdata = axis_in.tdata;
assign axis_fanout[1].tstrb = axis_in.tstrb;
assign axis_fanout[1].tkeep = axis_in.tkeep;
assign axis_fanout[1].tlast = axis_in.tlast;
assign axis_fanout[1].tid = axis_in.tid;
assign axis_fanout[1].tdest = axis_in.tdest;
assign axis_fanout[1].tuser = axis_in.tuser;
// --------------------------------------------------------------------
//
assign axis_in.tready = select ? axis_fanout[1].tready : axis_fanout[0].tready;
// --------------------------------------------------------------------
//
assign axis_fanout[0].tvalid = axis_in.tvalid & (select == 0);
assign axis_fanout[1].tvalid = axis_in.tvalid & (select == 1);
// --------------------------------------------------------------------
//
defparam axis_register_slice_lo.N = N; // why are these needed for recursive modules?
defparam axis_register_slice_lo.I = I;
defparam axis_register_slice_lo.D = D;
defparam axis_register_slice_lo.U = U;
defparam axis_register_slice_lo.USE_TSTRB = 0;
defparam axis_register_slice_lo.USE_TKEEP = 0;
axis_register_slice
// #(
// .N(N),
// .I(I),
// .D(D),
// .U(U),
// .USE_TSTRB(0),
// .USE_TKEEP(0)
// )
axis_register_slice_lo
(
.axis_in(axis_fanout[0]),
.axis_out(axis_out[0]),
.*
);
// --------------------------------------------------------------------
//
// why does questasim need these for recursive modules?
defparam axis_register_slice_hi.N = N;
defparam axis_register_slice_hi.I = I;
defparam axis_register_slice_hi.D = D;
defparam axis_register_slice_hi.U = U;
defparam axis_register_slice_hi.USE_TSTRB = 0;
defparam axis_register_slice_hi.USE_TKEEP = 0;
axis_register_slice
// #(
// .N(N),
// .I(I),
// .D(D),
// .U(U),
// .USE_TSTRB(0),
// .USE_TKEEP(0)
// )
axis_register_slice_hi
(
.axis_in(axis_fanout[1]),
.axis_out(axis_out[1]),
.*
);
// --------------------------------------------------------------------
//
endmodule