axi_mc_controller: Added delay module

library/axi_mc_controller/delay.v

@@ -0,0 +1,80 @@
+// -----------------------------------------------------------------------------
+//
+// Copyright 2014(c) Analog Devices, Inc.
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//  - Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//  - Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in
+//    the documentation and/or other materials provided with the
+//    distribution.
+//  - Neither the name of Analog Devices, Inc. nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//  - The use of this software may or may not infringe the patent rights
+//    of one or more patent holders.  This license does not release you
+//    from the requirement that you obtain separate licenses from these
+//    patent holders to use this software.
+//  - Use of the software either in source or binary form, must be run
+//    on or directly connected to an Analog Devices Inc. component.
+//
+// THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED
+// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY
+// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+// IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// -----------------------------------------------------------------------------
+// FILE NAME : delay.v
+// MODULE NAME : debouncer
+// AUTHOR : ACozma
+// AUTHOR’S EMAIL : andrei.cozma@analog.com
+//
+// -----------------------------------------------------------------------------
+
+`timescale 1ns / 1ps
+
+module delay
+//----------- Parameters Declarations -------------------------------------------
+#(
+    parameter DELAY = 128
+)
+//----------- Ports Declarations -----------------------------------------------
+(
+    input       clk_i,
+    input       rst_n_i,
+    input       sig_i,
+    output reg  sig_o
+);
+//------------------------------------------------------------------------------
+//----------- Registers Declarations -------------------------------------------
+//------------------------------------------------------------------------------
+reg [DELAY-1:0] shift_reg;
+
+//------------------------------------------------------------------------------
+//----------- Assign/Always Blocks ---------------------------------------------
+//------------------------------------------------------------------------------
+always @(posedge clk_i)
+begin
+    if(rst_n_i == 0)
+    begin
+        shift_reg   <= 0;
+        sig_o       <= 0;
+    end
+    else
+    begin
+        shift_reg   <= {shift_reg[DELAY-2:0], sig_i};
+        sig_o       <= shift_reg[DELAY-1];
+    end
+end
+
+endmodule