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//
// Copyright 2011 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
module gpif_tb();
reg sys_clk = 0;
reg sys_rst = 1;
reg gpif_clk = 0;
reg gpif_rst = 1;
reg [15:0] gpif_data;
reg WR = 0, EP = 0;
wire CF, DF;
wire gpif_full_d, gpif_full_c;
wire [18:0] data_o, ctrl_o, data_splt;
wire src_rdy, dst_rdy, src_rdy_splt, dst_rdy_splt;
wire ctrl_src_rdy, ctrl_dst_rdy;
assign ctrl_dst_rdy = 1;
initial $dumpfile("gpif_tb.vcd");
initial $dumpvars(0,gpif_tb);
initial #1000 gpif_rst = 0;
initial #1000 sys_rst = 0;
always #64 gpif_clk <= ~gpif_clk;
always #47.9 sys_clk <= ~sys_clk;
wire [18:0] data_int;
wire src_rdy_int, dst_rdy_int;
assign dst_rdy_splt = 1;
gpif_wr gpif_write
(.gpif_clk(gpif_clk), .gpif_rst(gpif_rst),
.gpif_data(gpif_data), .gpif_wr(WR), .gpif_ep(EP),
.gpif_full_d(DF), .gpif_full_c(CF),
.sys_clk(sys_clk), .sys_rst(sys_rst),
.data_o(data_int), .src_rdy_o(src_rdy_int), .dst_rdy_i(dst_rdy_int),
.ctrl_o(ctrl_o), .ctrl_src_rdy_o(ctrl_src_rdy), .ctrl_dst_rdy_i(ctrl_dst_rdy) );
packet_reframer tx_packet_reframer
(.clk(sys_clk), .reset(sys_rst), .clear(0),
.data_i(data_int), .src_rdy_i(src_rdy_int), .dst_rdy_o(dst_rdy_int),
.data_o(data_o), .src_rdy_o(src_rdy), .dst_rdy_i(dst_rdy));
packet_splitter #(.FRAME_LEN(256)) rx_packet_splitter
(.clk(sys_clk), .reset(sys_rst), .clear(0),
.frames_per_packet(2),
.data_i(data_o), .src_rdy_i(src_rdy), .dst_rdy_o(dst_rdy),
.data_o(data_splt), .src_rdy_o(src_rdy_splt), .dst_rdy_i(dst_rdy_splt));
always @(posedge sys_clk)
if(ctrl_src_rdy & ctrl_dst_rdy)
$display("CTRL: %x",ctrl_o);
always @(posedge sys_clk)
if(src_rdy_splt & dst_rdy_splt)
begin
if(data_splt[16])
$display("<-------- DATA SOF--------->");
$display("DATA: %x",data_splt);
if(data_splt[17])
$display("<-------- DATA EOF--------->");
end
initial
begin
#10000;
repeat (1)
begin
@(posedge gpif_clk);
WR <= 1;
gpif_data <= 256; // Length
@(posedge gpif_clk);
gpif_data <= 16'h00;
@(posedge gpif_clk);
repeat(254)
begin
gpif_data <= gpif_data + 1;
@(posedge gpif_clk);
end
WR <= 0;
while(DF)
@(posedge gpif_clk);
repeat (16)
@(posedge gpif_clk);
WR <= 1;
repeat(256)
begin
gpif_data <= gpif_data - 1;
@(posedge gpif_clk);
end
WR <= 0;
/*
while(DF)
@(posedge gpif_clk);
repeat (20)
@(posedge gpif_clk);
WR <= 1;
gpif_data <= 16'h5;
@(posedge gpif_clk);
gpif_data <= 16'h00;
@(posedge gpif_clk);
repeat(254)
begin
gpif_data <= gpif_data - 1;
@(posedge gpif_clk);
end
WR <= 0;
*/
end
end // initial begin
initial #200000 $finish;
endmodule // gpif_tb
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