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// 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
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