1// 2// Copyright 2014 Ettus Research LLC 3// Copyright 2018 Ettus Research, a National Instruments Company 4// 5// SPDX-License-Identifier: LGPL-3.0-or-later 6// 7 8module split_stream 9 #(parameter WIDTH=16, 10 parameter ACTIVE_MASK=4'b1111) 11 (input clk, input reset, input clear, // These are not used in plain split_stream 12 input [WIDTH-1:0] i_tdata, input i_tlast, input i_tvalid, output i_tready, 13 output [WIDTH-1:0] o0_tdata, output o0_tlast, output o0_tvalid, input o0_tready, 14 output [WIDTH-1:0] o1_tdata, output o1_tlast, output o1_tvalid, input o1_tready, 15 output [WIDTH-1:0] o2_tdata, output o2_tlast, output o2_tvalid, input o2_tready, 16 output [WIDTH-1:0] o3_tdata, output o3_tlast, output o3_tvalid, input o3_tready); 17 18 assign { o0_tlast, o0_tdata } = { i_tlast, i_tdata }; 19 assign { o1_tlast, o1_tdata } = { i_tlast, i_tdata }; 20 assign { o2_tlast, o2_tdata } = { i_tlast, i_tdata }; 21 assign { o3_tlast, o3_tdata } = { i_tlast, i_tdata }; 22 23 // NOTE -- this violates the AXI spec because tvalids are dependent on treadys. 24 // It will be ok most of the time, but muxes and demuxes will need a fifo in 25 // the middle to avoid deadlock 26 27 assign i_tready = ~|(~{o3_tready,o2_tready,o1_tready,o0_tready} & ACTIVE_MASK); 28 assign { o3_tvalid, o2_tvalid, o1_tvalid, o0_tvalid } = {4{i_tready & i_tvalid}}; 29 30endmodule // split_stream 31