// Copyright 2014 Ettus Research LLC // Copyright 2018 Ettus Research, a National Instruments Company // // SPDX-License-Identifier: LGPL-3.0-or-later module axi_chdr_header_trigger #( parameter WIDTH=64, parameter SID=0 ) (input clk, input reset, input clear, input [WIDTH-1:0] i_tdata, input i_tlast, input i_tvalid, input i_tready, output trigger ); reg state; localparam IDLE = 0; localparam RUN = 1; always @(posedge clk) if(reset | clear) state <= IDLE; else case (state) IDLE : if(i_tvalid && i_tready) state <= RUN; RUN : if(i_tready && i_tvalid && i_tlast) state <= IDLE; default : state <= IDLE; endcase // case (state) assign trigger = i_tvalid && i_tready && (state == IDLE) && (i_tdata[15:0] != SID); endmodule // axi_chdr_header_trigger