60 lines
2.6 KiB
Coq
60 lines
2.6 KiB
Coq
|
// ***************************************************************************
|
||
|
|
// ***************************************************************************
|
||
|
|
// Copyright 2017(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.
|
||
|
|
// ***************************************************************************
|
||
|
|
// ***************************************************************************
|
||
|
|
|
||
|
|
module cic_int #(
|
||
|
|
parameter DATA_WIDTH = 12
|
||
|
|
) (
|
||
|
|
input clk,
|
||
|
|
input ce,
|
||
|
|
input [DATA_WIDTH-1:0] data_in,
|
||
|
|
output [DATA_WIDTH-1:0] data_out
|
||
|
|
);
|
||
|
|
|
||
|
|
reg [DATA_WIDTH-1:0] state = 'h00;
|
||
|
|
wire [DATA_WIDTH-1:0] sum;
|
||
|
|
|
||
|
|
assign data_out = state;
|
||
|
|
assign sum = data_in + state;
|
||
|
|
|
||
|
|
always @(posedge clk) begin
|
||
|
|
if (ce == 1'b1) begin
|
||
|
|
state <= sum;
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
endmodule
|