Hello world

interface2/tests/hello_world_tb.v

@@ -0,0 +1,32 @@
+`default_nettype none
+
+module hello_world_tb();
+    reg clk = 0;
+
+    initial
+    begin
+        forever
+        begin
+            #1 clk <= ~clk;
+        end
+    end
+
+    wire tx;
+    wire tx_active;
+
+    hello_world dut (
+        .clk(clk),
+        .tx(tx),
+        .tx_active(tx_active)
+    );
+
+    initial
+    begin
+        $dumpfile("hello_world_tb.vcd");
+        $dumpvars(0, hello_world_tb);
+
+        repeat(2000) @(posedge clk);
+
+        $finish;
+    end
+endmodule