From 6c83fd8730e55de8b1daaac1deb111d3d9bd408e Mon Sep 17 00:00:00 2001
From: uvok
Date: Fri, 9 Jan 2026 15:18:23 +0100
Subject: move stuff around

---
 playground/led_toggle_tb.v | 59 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 playground/led_toggle_tb.v

(limited to 'playground/led_toggle_tb.v')

diff --git a/playground/led_toggle_tb.v b/playground/led_toggle_tb.v
new file mode 100644
index 0000000..78d4f21
--- /dev/null
+++ b/playground/led_toggle_tb.v
@@ -0,0 +1,59 @@
+`timescale 1us/1us
+
+module led_toggle_tb;
+
+logic clk_i;
+logic rst_i;
+logic key_i;
+
+logic [5:0] led;
+
+led_toggle #(.STABLE_PERIOD(2)) uut (
+  .rst_i(rst_i),
+  .clk_i(clk_i),
+  .key_i(key_i),
+  .led(led)
+);
+
+string filename;
+initial begin
+`ifdef DUMP_FILE_NAME
+  filename=`DUMP_FILE_NAME;
+`else
+  filename="led_toggle.lxt2";
+`endif
+  $dumpfile(filename); $dumpvars();
+  clk_i = 0;
+  key_i = 1'b1;
+  #1
+  rst_i = 0;
+  #1
+  rst_i = 1;
+end
+
+always #10 clk_i = ~clk_i;
+
+
+initial begin
+  // initial key press
+  #13
+  key_i = ~key_i;
+  repeat(2) @(negedge clk_i);
+  key_i = ~key_i;
+
+  // try bouncing
+
+  repeat(3) @(negedge clk_i);
+
+  for (integer i=0; i < 19; i = i + 1) begin
+    @(negedge clk_i);
+    key_i = ~key_i;
+  end
+  repeat(10) @(negedge clk_i);
+  key_i = ~key_i;
+
+  repeat(10) @(negedge clk_i);
+  $finish();
+end
+
+endmodule
-- 
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