Ad reset conditioner

first/reset_conditioner.v

@@ -0,0 +1,31 @@
+/*
+   Parameters:
+     STAGES = 4
+*/
+module reset_conditioner (
+    input clk,
+    input rin,
+    output reg rout
+  );
+  
+  localparam STAGES = 3'h4;
+  
+  
+  reg [3:0] M_stage_d, M_stage_q = 4'hf;
+  
+  always @* begin
+    M_stage_d = M_stage_q;
+    
+    M_stage_d = {M_stage_q[0+2-:3], 1'h0};
+    rout = M_stage_q[3+0-:1];
+  end
+  
+  always @(posedge clk) begin
+    if (rin == 1'b1) begin
+      M_stage_q <= 4'hf;
+    end else begin
+      M_stage_q <= M_stage_d;
+    end
+  end
+  
+endmodule