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//
// Copyright 2012-2013 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: LGPL-3.0-or-later
//
module fifo64_to_gpif2
#(
parameter FIFO_SIZE = 9,
parameter MTU = 12
)
(
//input fifo interface
input fifo_clk, input fifo_rst,
input [63:0] i_tdata,
input i_tlast,
input i_tvalid,
output i_tready,
//output interface
input gpif_clk, input gpif_rst,
output [31:0] o_tdata,
output o_tlast,
output o_tvalid,
input o_tready
);
wire [31:0] i32_tdata;
wire i32_tlast;
wire i32_tvalid, i32_tready;
axi_fifo64_to_fifo32 fifo64_to_fifo32
(
.clk(fifo_clk), .reset(fifo_rst), .clear(1'b0),
.i_tdata(i_tdata), .i_tuser(3'b0/*done care*/), .i_tlast(i_tlast), .i_tvalid(i_tvalid), .i_tready(i_tready),
.o_tdata(i32_tdata), .o_tuser(/*ignored cuz vita has len*/), .o_tlast(i32_tlast), .o_tvalid(i32_tvalid), .o_tready(i32_tready)
);
wire [31:0] gate_tdata;
wire gate_tlast;
wire gate_tvalid, gate_tready;
axi_fifo_2clk #(.WIDTH(33), .SIZE(FIFO_SIZE)) cross_clock_fifo
(
.reset(fifo_rst | gpif_rst),
.i_aclk(fifo_clk), .i_tdata({i32_tlast, i32_tdata}), .i_tvalid(i32_tvalid), .i_tready(i32_tready),
.o_aclk(gpif_clk), .o_tdata({gate_tlast, gate_tdata}), .o_tvalid(gate_tvalid), .o_tready(gate_tready)
);
wire [31:0] int0_tdata; wire int0_tlast, int0_tvalid, int0_tready;
axi_packet_gate #(.WIDTH(32), .SIZE(MTU), .USE_AS_BUFF(0)) buffer_whole_pkt
(
.clk(gpif_clk), .reset(gpif_rst), .clear(1'b0),
.i_tdata(gate_tdata), .i_tlast(gate_tlast), .i_terror(1'b0), .i_tvalid(gate_tvalid), .i_tready(gate_tready),
.o_tdata(int0_tdata), .o_tlast(int0_tlast), .o_tvalid(int0_tvalid), .o_tready(int0_tready)
);
axi_fifo #(.WIDTH(33), .SIZE(1)) outgress_timing_fifo
(
.clk(gpif_clk), .reset(gpif_rst), .clear(1'b0),
.i_tdata({int0_tlast, int0_tdata}), .i_tvalid(int0_tvalid), .i_tready(int0_tready), .space(),
.o_tdata({o_tlast, o_tdata}), .o_tvalid(o_tvalid), .o_tready(o_tready), .occupied()
);
endmodule //fifo_to_gpmc16
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