pluto_hdl_adi/library/prcfg/bist/prcfg_adc.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_adc (
clk,
// control ports
control,
status,
// FIFO interface
src_adc_enable,
src_adc_valid,
src_adc_data,
dst_adc_enable,
dst_adc_valid,
dst_adc_data
);
localparam RP_ID = 8'hA1;
parameter CHANNEL_ID = 0;
input clk;
input [31:0] control;
output [31:0] status;
input src_adc_enable;
input src_adc_valid;
input [15:0] src_adc_data;
output dst_adc_enable;
output dst_adc_valid;
output [15:0] dst_adc_data;
reg dst_adc_enable;
reg dst_adc_valid;
reg [15:0] dst_adc_data;
reg [31:0] status = 0;
reg [15:0] adc_pn_data = 0;
reg [ 3:0] mode;
reg [ 3:0] channel_sel;
wire adc_dvalid;
wire [15:0] adc_pn_data_s;
wire adc_pn_oos_s;
wire adc_pn_err_s;
// prbs function
function [15:0] pn;
input [15:0] din;
reg [15:0] dout;
begin
dout[15] = din[14] ^ din[15];
dout[14] = din[13] ^ din[14];
dout[13] = din[12] ^ din[13];
dout[12] = din[11] ^ din[12];
dout[11] = din[10] ^ din[11];
dout[10] = din[ 9] ^ din[10];
dout[ 9] = din[ 8] ^ din[ 9];
dout[ 8] = din[ 7] ^ din[ 8];
dout[ 7] = din[ 6] ^ din[ 7];
dout[ 6] = din[ 5] ^ din[ 6];
dout[ 5] = din[ 4] ^ din[ 5];
dout[ 4] = din[ 3] ^ din[ 4];
dout[ 3] = din[ 2] ^ din[ 3];
dout[ 2] = din[ 1] ^ din[ 2];
dout[ 1] = din[ 0] ^ din[ 1];
dout[ 0] = din[14] ^ din[15] ^ din[ 0];
pn = dout;
end
endfunction
assign adc_dvalid = src_adc_enable & src_adc_valid;
always @(posedge clk) begin
channel_sel <= control[3:0];
mode <= control[7:4];
end
// prbs generation
always @(posedge clk) begin
if(adc_dvalid == 1'b1) begin
adc_pn_data <= pn(adc_pn_data_s);
end
end
assign adc_pn_data_s = (adc_pn_oos_s == 1'b1) ? src_adc_ddata : adc_pn_data;
ad_pnmon #(
.DATA_WIDTH(32)
) i_pn_mon (
.adc_clk(clk),
.adc_valid_in(adc_dvalid),
.adc_data_in(src_adc_ddata),
.adc_data_pn(adc_pn_data),
.adc_pn_oos(adc_pn_oos_s),
.adc_pn_err(adc_pn_err_s));
// rx path are passed through on test mode
always @(posedge clk) begin
dst_adc_enable <= src_adc_enable;
dst_adc_data <= src_adc_data;
dst_adc_valid <= src_adc_valid;
end
// setup status bits for gpio_out
always @(posedge clk) begin
if((mode == 3'd2) && (channel_sel == CHANNEL_ID)) begin
status <= {22'h0, adc_pn_err_s, adc_pn_oos_s, RP_ID};
end else begin
status <= {24'h0, RP_ID};
end
end
endmodule