122 lines
4.1 KiB
Verilog
122 lines
4.1 KiB
Verilog
// ***************************************************************************
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// ***************************************************************************
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// Copyright 2011(c) Analog Devices, Inc.
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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// - Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// - Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in
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// the documentation and/or other materials provided with the
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// distribution.
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// - Neither the name of Analog Devices, Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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// - The use of this software may or may not infringe the patent rights
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// of one or more patent holders. This license does not release you
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// from the requirement that you obtain separate licenses from these
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// patent holders to use this software.
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// - Use of the software either in source or binary form, must be run
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// on or directly connected to an Analog Devices Inc. component.
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//
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// THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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// INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A
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// PARTICULAR PURPOSE ARE DISCLAIMED.
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//
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// IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY
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// RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// ***************************************************************************
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// ***************************************************************************
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// PN monitors
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`timescale 1ns/100ps
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module axi_ad9963_rx_pnmon (
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// adc interface
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input adc_clk,
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input adc_valid,
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input [11:0] adc_data,
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// pn out of sync and error
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input [ 3:0] adc_pnseq_sel,
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output adc_pn_oos,
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output adc_pn_err);
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// internal registers
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reg [23:0] adc_pn_data_in = 'd0;
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reg [23:0] adc_pn_data_pn = 'd0;
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// internal signals
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wire [31:0] adc_pn_data_pn_s;
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// bit reversal function
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function [11:0] brfn;
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input [11:0] din;
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reg [11:0] dout;
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begin
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dout[11] = din[ 0];
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dout[10] = din[ 1];
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dout[ 9] = din[ 2];
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dout[ 8] = din[ 3];
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dout[ 7] = din[ 4];
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dout[ 6] = din[ 5];
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dout[ 5] = din[ 6];
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dout[ 4] = din[ 7];
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dout[ 3] = din[ 8];
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dout[ 2] = din[ 9];
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dout[ 1] = din[10];
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dout[ 0] = din[11];
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brfn = dout;
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end
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endfunction
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// standard prbs functions
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function [23:0] pn23;
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input [23:0] din;
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reg [23:0] dout;
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begin
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dout = {din[22:0], din[22] ^ din[17]};
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pn23 = dout;
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end
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endfunction
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// standard, runs on 24bit
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assign adc_pn_data_pn_s = (adc_pn_oos == 1'b1) ? adc_pn_data_in : adc_pn_data_pn;
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always @(posedge adc_clk) begin
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if(adc_valid == 1'b1) begin
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adc_pn_data_in <= {adc_pn_data_in[22:11], adc_data};
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adc_pn_data_pn <= pn23(adc_pn_data_pn_s);
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end
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end
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// pn oos & pn err
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ad_pnmon #(.DATA_WIDTH(24)) i_pnmon (
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.adc_clk (adc_clk),
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.adc_valid_in (adc_valid),
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.adc_data_in (adc_pn_data_in),
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.adc_data_pn (adc_pn_data_pn),
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.adc_pn_oos (adc_pn_oos),
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.adc_pn_err (adc_pn_err));
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endmodule
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// ***************************************************************************
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// ***************************************************************************
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