From 11a0ed5a6e8af2e224caf1cb782829dfd8737b5e Mon Sep 17 00:00:00 2001
From: Michael Abed <michaelabed@gmail.com>
Date: Thu, 22 Mar 2012 16:14:11 -0400
Subject: updates

---
 Countdown.v | 52 ++++++++++++++++++++++++++++++----------------------
 1 file changed, 30 insertions(+), 22 deletions(-)

(limited to 'Countdown.v')

diff --git a/Countdown.v b/Countdown.v
index 78e4162..a8c7506 100644
--- a/Countdown.v
+++ b/Countdown.v
@@ -23,35 +23,43 @@ module Countdown(
     input rst,
     input start,
     input [7:0] init,
-    output [7:0] t
+    output [7:0] t,
+	 output running
     );
 
 reg [7:0] t;
-reg running = 0;
+reg running = 0;
+reg [7:0] count;
+
+always @(posedge clk_1hz or posedge rst) begin
+	if (rst)
+		count <= 0;
+	else if (running)
+		count <= count + 1;
+	else
+		count <= 0;
+end
 
-always @(init) begin
-	if (!running) begin
-		t = init;
-	end else begin
-		t = t;
-	end
-end
-
-always @(posedge clk_1hz) begin
-	if (running) begin
-		t <= t - 1;
-	end else begin
-		t <= init;
-	end
-end
+always @(posedge clk_1hz or posedge rst) begin
+
+	if (rst)
+		t <= 0;
+	else //if (running)
+		t <= init - count;
 
-always @(posedge start) begin
-	running = 1;
 end
 
-always @(rst) begin
-	running = 0;
-	t = 0;
+always @(posedge start or posedge rst) begin
+	
+	if (rst)
+		running <= 0;
+	else if (count == init) begin
+		running <= 0;
+	end else if (start)
+		running <= 1;
+	else
+		running <= running;
+	
 end
 
 endmodule
-- 
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