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|
`timescale 1us/1us
module fifo_tb (
);
reg clk_i;
reg rst_i;
reg read_i, write_i;
reg [7:0] data_i;
fifo #(
.DATA_WIDTH(8),
.DATA_DEPTH(8)
) uut (
.clk_i(clk_i),
.rst_i(rst_i),
.write_i(write_i),
.read_i(read_i),
.data_i(data_i),
.empty_o(),
.full_o(),
.data_o()
);
string filename;
initial begin
`ifdef DUMP_FILE_NAME
filename=`DUMP_FILE_NAME;
`else
filename="fifo.lxt2";
`endif
$dumpfile(filename); $dumpvars();
clk_i = 0;
rst_i = 1'b1;
read_i = 0;
write_i = 0;
data_i = 0;
end
always #10 clk_i = ~clk_i;
initial begin
#15
for (integer run = 1; run < 3; run++) begin
write_i = 1;
for (integer addr = 0; addr < 10; addr++) begin
data_i = (run << 4) | addr;
#20
;
end
write_i = 0;
read_i = 1;
for (integer addr = 0; addr < 10; addr++) begin
#20
;
end
read_i = 0;
#20
;
end
#100
$finish();
end
endmodule
|
