From c756a4d5b920602873a938a7adde6f626e2199b0 Mon Sep 17 00:00:00 2001
From: uvok
Date: Fri, 26 Dec 2025 14:50:22 +0100
Subject: debounde: implement

using params
---
 debounce.v | 32 ++++++++++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

(limited to 'debounce.v')

diff --git a/debounce.v b/debounce.v
index efeb845..704a588 100644
--- a/debounce.v
+++ b/debounce.v
@@ -5,11 +5,39 @@ module debounce (
   output reg signal_o
 );
 
+parameter STABLE_PERIOD = 50;
+parameter INIT_SIG_STATE = 1'b1;
+
+reg [31:0] clk_counter;
+reg prev_state;
+
 always @(posedge clk_i or negedge rst_i) begin
   if (!rst_i) begin
-    
+    clk_counter <= 0;
+    prev_state <= INIT_SIG_STATE;
+    signal_o <= INIT_SIG_STATE;
+  end else begin
+    clk_counter <= clk_counter + 1;
+
+    if (signal_i != prev_state) begin
+      clk_counter <= 0;
+      prev_state <= signal_i;
+    end
+
+    if (clk_counter == STABLE_PERIOD) begin
+      signal_o <= signal_i;
+    end
   end
-  signal_o <= signal_i;
 end
 
+// Learning?
+// Apparently, (and obviously, when you think about it),
+// it's not possible to drive a signal by two blocks
+// always @(signal_i) begin
+//   if (signal_i != prev_state) begin
+//     clk_counter <= 0;
+//     prev_state <= signal_i;
+//   end
+// end
+
 endmodule
-- 
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