pluto_hdl_adi/library/prcfg/bist/prcfg_dac.v

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// ***************************************************************************
// ***************************************************************************
// Copyright 2013(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.
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************
`timescale 1ns/1ns
module prcfg_dac(
clk,
// control ports
control,
status,
// FIFO interface
src_dac_en,
src_dac_ddata,
src_dac_dunf,
src_dac_dvalid,
dst_dac_en,
dst_dac_ddata,
dst_dac_dunf,
dst_dac_dvalid
);
localparam RP_ID = 8'hA1;
parameter CHANNEL_ID = 0;
input clk;
input [31:0] control;
output [31:0] status;
output src_dac_en;
input [31:0] src_dac_ddata;
input src_dac_dunf;
input src_dac_dvalid;
input dst_dac_en;
output [31:0] dst_dac_ddata;
output dst_dac_dunf;
output dst_dac_dvalid;
reg dst_dac_dunf = 0;
reg [31:0] dst_dac_ddata = 0;
reg dst_dac_dvalid = 0;
reg src_dac_en = 0;
reg [31:0] dac_prbs = 32'hA2F19C;
reg [31:0] status = 0;
reg [ 2:0] counter = 0;
reg pattern = 0;
reg [15:0] sin_tone = 0;
reg [15:0] cos_tone = 0;
reg [ 3:0] mode;
wire [31:0] dac_pattern_s;
// prbs function
function [31:0] pn;
input [31:0] din;
reg [31:0] dout;
begin
dout[31] = din[14] ^ din[13];
dout[30] = din[13] ^ din[12];
dout[29] = din[12] ^ din[11];
dout[28] = din[11] ^ din[10];
dout[27] = din[10] ^ din[9];
dout[26] = din[9] ^ din[8];
dout[25] = din[8] ^ din[7];
dout[24] = din[7] ^ din[6];
dout[23] = din[6] ^ din[5];
dout[22] = din[5] ^ din[4];
dout[21] = din[4] ^ din[3];
dout[20] = din[3] ^ din[2];
dout[19] = din[2] ^ din[1];
dout[18] = din[1] ^ din[0];
dout[17] = din[0] ^ din[14] ^ din[13];
dout[16] = din[14] ^ din[12];
dout[15] = din[13] ^ din[11];
dout[14] = din[12] ^ din[10];
dout[13] = din[11] ^ din[9];
dout[12] = din[10] ^ din[8];
dout[11] = din[9] ^ din[7];
dout[10] = din[8] ^ din[6];
dout[9] = din[7] ^ din[5];
dout[8] = din[6] ^ din[4];
dout[7] = din[5] ^ din[3];
dout[6] = din[4] ^ din[2];
dout[5] = din[3] ^ din[1];
dout[4] = din[2] ^ din[0];
dout[3] = din[1] ^ din[14] ^ din[13];
dout[2] = din[0] ^ din[13] ^ din[12];
dout[1] = din[14] ^ din[12] ^ din[13] ^ din[11];
dout[0] = din[13] ^ din[11] ^ din[12] ^ din[10];
pn = dout;
end
endfunction
always @(posedge clk) begin
status <= {24'h0, RP_ID};
mode <= control[7:4];
end
// sine tone generation
always @(posedge clk) begin
if (dst_dac_en == 1'h1) begin
counter <= counter + 1;
end
end
always @(counter) begin
case(counter)
3'd0 : begin
sin_tone <= 16'h0000;
cos_tone <= 16'h7FFF;
end
3'd1 : begin
sin_tone <= 16'h5A82;
cos_tone <= 16'h5A82;
end
3'd2 : begin
sin_tone <= 16'h7FFF;
cos_tone <= 16'h0000;
end
3'd3 : begin
sin_tone <= 16'h5A82;
cos_tone <= 16'hA57E;
end
3'd4 : begin
sin_tone <= 16'h0000;
cos_tone <= 16'h8001;
end
3'd5 : begin
sin_tone <= 16'hA57E;
cos_tone <= 16'hA57E;
end
3'd6 : begin
sin_tone <= 16'h8001;
cos_tone <= 16'h0000;
end
3'd7 : begin
sin_tone <= 16'hA57E;
cos_tone <= 16'h5A82;
end
endcase
end
// prbs generation
always @(posedge clk) begin
if(dst_dac_en == 1'h1) begin
dac_prbs <= pn(dac_prbs);
end
end
// constant pattern generator
always @(posedge clk) begin
if(dst_dac_en == 1'h1) begin
pattern <= ~pattern;
end
end
assign dac_pattern_s = (pattern == 1'h1) ?
{16'h5555, 16'hAAAA, 16'h5555, 16'hAAAA} :
{16'hAAAA, 16'h5555, 16'hAAAA, 16'h5555};
// output mux for tx side
always @(posedge clk) begin
src_dac_en <= (mode == 0) ? dst_dac_en : 1'b0;
dst_dac_dvalid <= (mode == 0) ? src_dac_dvalid : dst_dac_en;
dst_dac_dunf <= (mode == 0) ? src_dac_dunf : 1'b0;
end
always @(posedge clk) begin
case(mode)
4'h0 : begin
dst_dac_ddata <= src_dac_ddata;
end
4'h1 : begin
dst_dac_ddata <= {cos_tone, sin_tone};
end
4'h2 : begin
dst_dac_ddata <= dac_prbs;
end
4'h3 : begin
dst_dac_ddata <= dac_pattern_s;
end
default : begin
dst_dac_ddata <= src_dac_ddata;
end
endcase
end
endmodule