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[/] [qaz_libs/] [trunk/] [axi4_stream_lib/] [src/] [recursive_axis_mux.sv] - Rev 38
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//////////////////////////////////////////////////////////////////////
//// ////
//// 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
recursive_axis_mux
#(
N, // data bus width in bytes
I = 1, // TID width
D = 1, // TDEST width
U = 1, // TUSER width
MA, // mux select width
MD = 2 ** MA
)
(
input [MA-1:0] select,
axis_if axis_in [MD-1:0],
axis_if axis_out,
input aclk,
input aresetn
);
// --------------------------------------------------------------------
//
generate
if(MA == 1)
begin: mux_gen
axis_mux #(.N(N), .I(I), .D(D), .U(U))
axis_mux_i(.*);
end
else
begin: recurse_mux_gen
axis_if #(.N(N), .I(I), .D(D), .U(U)) axis_mux_out[1:0](.*);
recursive_axis_mux #(.N(N), .I(I), .D(D), .U(U), .MA(MA - 1))
mux_lo
(
.select(select[MA-2:0]),
.axis_in(axis_in[(MD/2)-1:0]),
.axis_out(axis_mux_out[0]),
.*
);
recursive_axis_mux #(.N(N), .I(I), .D(D), .U(U), .MA(MA - 1))
mux_hi
(
.select(select[MA-2:0]),
.axis_in(axis_in[MD-1:(MD/2)]),
.axis_out(axis_mux_out[1]),
.*
);
axis_mux #(.N(N), .I(I), .D(D), .U(U))
axis_mux_i
(
.select(select[MA-1]),
.axis_in(axis_mux_out),
.*
);
end
endgenerate
// --------------------------------------------------------------------
//
endmodule
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