move stuff around

1 files changed, 72 insertions, 0 deletions

diff --git a/playground/fifo_tb.v b/playground/fifo_tb.v
new file mode 100644
index 0000000..38199a6
--- /dev/null
+++ b/playground/fifo_tb.v
@@ -0,0 +1,72 @@
+`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