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51 lines
1.9 KiB
Verilog
51 lines
1.9 KiB
Verilog
// Copyright 2007 Altera Corporation. All rights reserved.
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// Altera products are protected under numerous U.S. and foreign patents,
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// maskwork rights, copyrights and other intellectual property laws.
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//
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// This reference design file, and your use thereof, is subject to and governed
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// by the terms and conditions of the applicable Altera Reference Design
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// License Agreement (either as signed by you or found at www.altera.com). By
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// using this reference design file, you indicate your acceptance of such terms
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// and conditions between you and Altera Corporation. In the event that you do
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// not agree with such terms and conditions, you may not use the reference
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// design file and please promptly destroy any copies you have made.
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//
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// This reference design file is being provided on an "as-is" basis and as an
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// accommodation and therefore all warranties, representations or guarantees of
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// any kind (whether express, implied or statutory) including, without
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// limitation, warranties of merchantability, non-infringement, or fitness for
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// a particular purpose, are specifically disclaimed. By making this reference
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// design file available, Altera expressly does not recommend, suggest or
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// require that this reference design file be used in combination with any
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// other product not provided by Altera.
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/////////////////////////////////////////////////////////////////////////////
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// baeckler - 06-16-2006
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//
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// (1 cell per bit)
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module cntr_modulus (clk,ena,rst,sload,sdata,sclear,q);
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parameter WIDTH = 16;
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parameter MOD_VAL = 50223;
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input clk,ena,rst,sload,sclear;
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input [WIDTH-1:0] sdata;
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output [WIDTH-1:0] q;
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reg [WIDTH-1:0] q;
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wire maxed = (q == MOD_VAL-1) /* synthesis keep */;
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always @(posedge clk or posedge rst) begin
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if (rst) q <= 0;
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else begin
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if (ena) begin
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if (sclear) q <= 0;
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else if (sload) q <= sdata;
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else q <= (maxed ? 0 : q) + (maxed ? 0 : 1'b1);
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end
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end
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end
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endmodule |