hdl/include/random_pulse_gen.svh: burst generation

0e98042e · Tomasz Wlostowski · 043329c6 · 0e98042e
Commit 0e98042e authored Feb 21, 2013 by Tomasz Wlostowski
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Showing with 17 additions and 5 deletions

random_pulse_gen.svh hdl/include/random_pulse_gen.svh +17 -5

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--- a/hdl/include/random_pulse_gen.svh
+++ b/hdl/include/random_pulse_gen.svh
@@ -8,21 +8,33 @@ module random_pulse_gen
   parameter real g_pulse_width  = 30ns;
   parameter real g_min_spacing  = 300ns;
   parameter real g_max_spacing  = 600ns;
-
+   parameter int  g_repetition = 1;
+   parameter real g_burst_spacing = 50ns;
+   
+   
   int seed 			 = 1;
   

   initial forever
     if(enable_i)
       begin
+          int i;
+          
 	  real delta;
 	  seed 	   = $urandom(seed);
 	  delta    = $dist_uniform(seed, g_min_spacing - g_pulse_width, g_max_spacing - g_pulse_width);
-	  pulse_o  = 1;
-	  #(g_pulse_width);
-	  pulse_o  = 0;
-	  #(delta);
+	  for(i=0;i<g_repetition;i++)
+            begin
+               pulse_o  = 1;
+	       #(g_pulse_width);
+	       pulse_o  = 0;
+               if(g_repetition > 1)
+                 #(g_burst_spacing);
+               
+            end
 	  
+          #(delta);
+          
       end else begin
 	  pulse_o <= 1'b0;
 	  @(posedge enable_i);