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qaztronic |
//////////////////////////////////////////////////////////////////////
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//// ////
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//// Copyright (C) 2017 Authors and OPENCORES.ORG ////
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//// ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer. ////
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//// ////
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//// This source file is free software; you can redistribute it ////
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//// and/or modify it under the terms of the GNU Lesser General ////
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//// Public License as published by the Free Software Foundation; ////
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//// either version 2.1 of the License, or (at your option) any ////
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//// later version. ////
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//// ////
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//// This source is distributed in the hope that it will be ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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//// PURPOSE. See the GNU Lesser General Public License for more ////
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//// details. ////
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//// ////
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//// You should have received a copy of the GNU Lesser General ////
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//// Public License along with this source; if not, download it ////
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//// from http://www.opencores.org/lgpl.shtml ////
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//// ////
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//////////////////////////////////////////////////////////////////////
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module
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recursive_axis_switch
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#(
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N, // data bus width in bytes
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I = 1, // TID width
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D = 1, // TDEST width
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U = 1, // TUSER width
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SA, // mux select width
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SD = 2 ** SA
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)
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(
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input [SA-1:0] select,
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axis_if axis_in,
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axis_if axis_out[SD-1:0],
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input aclk,
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input aresetn
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);
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// --------------------------------------------------------------------
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//
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generate
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if(SA == 1)
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begin: switch_gen
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axis_switch #(.N(N), .I(I), .D(D), .U(U))
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axis_switch_i(.*);
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end
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else
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begin: recursive_switch_gen
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// --------------------------------------------------------------------
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//
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axis_if #(.N(N), .I(I), .D(D), .U(U)) axis_switch_out[1:0](.*);
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axis_switch #(.N(N), .I(I), .D(D), .U(U))
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axis_switch_i
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(
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.select(select[SA-1]),
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.axis_out(axis_switch_out),
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.*
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);
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// --------------------------------------------------------------------
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//
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recursive_axis_switch #(.N(N), .I(I), .D(D), .U(U), .SA(SA - 1))
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switch_lo
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(
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.select(select[SA-2:0]),
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.axis_in(axis_switch_out[0]),
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.axis_out(axis_out[(SD/2)-1:0]),
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.*
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);
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// --------------------------------------------------------------------
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//
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recursive_axis_switch #(.N(N), .I(I), .D(D), .U(U), .SA(SA - 1))
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switch_hi
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(
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.select(select[SA-2:0]),
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.axis_in(axis_switch_out[1]),
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.axis_out(axis_out[SD-1:(SD/2)]),
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.*
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);
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end
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endgenerate
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// --------------------------------------------------------------------
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//
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endmodule
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