pluto_hdl_adi/library/axi_logic_analyzer/axi_logic_analyzer.v

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// ***************************************************************************
// ***************************************************************************
// Copyright 2014 - 2017 (c) Analog Devices, Inc. All rights reserved.
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//
// Each core or library found in this collection may have its own licensing terms.
// The user should keep this in in mind while exploring these cores.
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//
// Redistribution and use in source and binary forms,
// with or without modification of this file, are permitted under the terms of either
// (at the option of the user):
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//
// 1. The GNU General Public License version 2 as published by the
// Free Software Foundation, which can be found in the top level directory, or at:
// https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html
//
// OR
//
// 2. An ADI specific BSD license as noted in the top level directory, or on-line at:
// https://github.com/analogdevicesinc/hdl/blob/dev/LICENSE
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//
// ***************************************************************************
// ***************************************************************************
`timescale 1ns/100ps
module axi_logic_analyzer (
input clk,
output clk_out,
input [15:0] data_i,
output reg [15:0] data_o,
output [15:0] data_t,
input [ 1:0] trigger_i,
output reg adc_valid,
output reg [15:0] adc_data,
input [15:0] dac_data,
input dac_valid,
output reg dac_read,
output trigger_out,
output [31:0] trigger_offset,
// axi interface
input s_axi_aclk,
input s_axi_aresetn,
input s_axi_awvalid,
input [ 6:0] s_axi_awaddr,
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input [ 2:0] s_axi_awprot,
output s_axi_awready,
input s_axi_wvalid,
input [31:0] s_axi_wdata,
input [ 3:0] s_axi_wstrb,
output s_axi_wready,
output s_axi_bvalid,
output [ 1:0] s_axi_bresp,
input s_axi_bready,
input s_axi_arvalid,
input [ 6:0] s_axi_araddr,
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input [ 2:0] s_axi_arprot,
output s_axi_arready,
output s_axi_rvalid,
output [31:0] s_axi_rdata,
output [ 1:0] s_axi_rresp,
input s_axi_rready);
// internal registers
reg [15:0] data_m1 = 'd0;
reg [15:0] data_r = 'd0;
reg [ 1:0] trigger_m1 = 'd0;
reg [ 1:0] trigger_m2 = 'd0;
reg [31:0] downsampler_counter_la = 'd0;
reg [31:0] upsampler_counter_pg = 'd0;
reg sample_valid_la = 'd0;
reg adc_valid_d1 = 'd0;
reg adc_valid_d2 = 'd0;
reg [15:0] io_selection; // 1 - input, 0 - output
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// internal signals
wire up_clk;
wire up_rstn;
wire [ 4:0] up_waddr;
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wire [31:0] up_wdata;
wire up_wack;
wire up_wreq;
wire up_rack;
wire [31:0] up_rdata;
wire up_rreq;
wire [ 4:0] up_raddr;
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wire reset;
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wire [31:0] divider_counter_la;
wire [31:0] divider_counter_pg;
wire [17:0] edge_detect_enable;
wire [17:0] rise_edge_enable;
wire [17:0] fall_edge_enable;
wire [17:0] low_level_enable;
wire [17:0] high_level_enable;
wire [31:0] trigger_delay;
wire trigger_logic; // 0-OR,1-AND,2-XOR,3-NOR,4-NAND,5-NXOR
wire clock_select;
wire [15:0] overwrite_enable;
wire [15:0] overwrite_data;
wire [15:0] io_selection_s; // 1 - input, 0 - output
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wire [15:0] od_pp_n; // 0 - push/pull, 1 - open drain
genvar i;
// signal name changes
assign up_clk = s_axi_aclk;
assign up_rstn = s_axi_aresetn;
assign trigger_offset = trigger_delay;
generate
for (i = 0 ; i < 16; i = i + 1) begin
assign data_t[i] = od_pp_n[i] ? io_selection[i] & !data_o[i] : io_selection[i];
always @(posedge clk_out) begin
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data_o[i] <= overwrite_enable[i] ? overwrite_data[i] : data_r[i];
end
always @(posedge clk_out) begin
if(dac_valid == 1'b1) begin
data_r[i] <= dac_data[i];
end
if (io_selection_s[i] == 1'b1) begin
io_selection[i] <= 1'b1;
end else begin
if(dac_valid == 1'b1 || overwrite_data[i] == 1'b1) begin
io_selection[i] <= 1'b0;
end
end
end
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end
endgenerate
BUFGMUX_CTRL BUFGMUX_CTRL_inst (
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.O (clk_out),
.I0 (clk),
.I1 (data_i[0]),
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.S (clock_select));
// synchronization
always @(posedge clk_out) begin
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data_m1 <= data_i;
trigger_m1 <= trigger_i;
trigger_m2 <= trigger_m1;
end
// transfer data at clock frequency
// if capture is enabled
always @(posedge clk_out) begin
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adc_valid_d1 <= adc_valid_d2;
adc_valid <= adc_valid_d1;
if (sample_valid_la == 1'b1) begin
adc_data <= data_m1;
adc_valid_d2 <= 1'b1;
end else begin
adc_valid_d2 <= 1'b0;
end
end
// downsampler logic analyzer
always @(posedge clk_out) begin
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if (reset == 1'b1) begin
sample_valid_la <= 1'b0;
downsampler_counter_la <= 32'h0;
end else begin
if (downsampler_counter_la < divider_counter_la ) begin
downsampler_counter_la <= downsampler_counter_la + 1;
sample_valid_la <= 1'b0;
end else begin
downsampler_counter_la <= 32'h0;
sample_valid_la <= 1'b1;
end
end
end
// upsampler pattern generator
always @(posedge clk_out) begin
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if (reset == 1'b1) begin
upsampler_counter_pg <= 32'h0;
dac_read <= 1'b0;
end else begin
dac_read <= 1'b0;
if (upsampler_counter_pg < divider_counter_pg) begin
upsampler_counter_pg <= upsampler_counter_pg + 1;
end else begin
upsampler_counter_pg <= 32'h0;
dac_read <= 1'b1;
end
end
end
axi_logic_analyzer_trigger i_trigger (
.clk (clk_out),
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.reset (reset),
.data (adc_data),
.data_valid(sample_valid_la),
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.trigger (trigger_m2),
.edge_detect_enable (edge_detect_enable),
.rise_edge_enable (rise_edge_enable),
.fall_edge_enable (fall_edge_enable),
.low_level_enable (low_level_enable),
.high_level_enable (high_level_enable),
.trigger_logic (trigger_logic),
.trigger_out (trigger_out));
axi_logic_analyzer_reg i_registers (
.clk (clk_out),
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.reset (reset),
.divider_counter_la (divider_counter_la),
.divider_counter_pg (divider_counter_pg),
.io_selection (io_selection_s),
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.edge_detect_enable (edge_detect_enable),
.rise_edge_enable (rise_edge_enable),
.fall_edge_enable (fall_edge_enable),
.low_level_enable (low_level_enable),
.high_level_enable (high_level_enable),
.trigger_delay (trigger_delay),
.trigger_logic (trigger_logic),
.clock_select (clock_select),
.overwrite_enable (overwrite_enable),
.overwrite_data (overwrite_data),
.input_data (adc_data),
.od_pp_n (od_pp_n),
// bus interface
.up_rstn (up_rstn),
.up_clk (up_clk),
.up_wreq (up_wreq),
.up_waddr (up_waddr),
.up_wdata (up_wdata),
.up_wack (up_wack),
.up_rreq (up_rreq),
.up_raddr (up_raddr),
.up_rdata (up_rdata),
.up_rack (up_rack));
// axi interface
up_axi #(
.AXI_ADDRESS_WIDTH(7),
.ADDRESS_WIDTH(5)
) i_up_axi (
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.up_rstn (up_rstn),
.up_clk (up_clk),
.up_axi_awvalid (s_axi_awvalid),
.up_axi_awaddr (s_axi_awaddr),
.up_axi_awready (s_axi_awready),
.up_axi_wvalid (s_axi_wvalid),
.up_axi_wdata (s_axi_wdata),
.up_axi_wstrb (s_axi_wstrb),
.up_axi_wready (s_axi_wready),
.up_axi_bvalid (s_axi_bvalid),
.up_axi_bresp (s_axi_bresp),
.up_axi_bready (s_axi_bready),
.up_axi_arvalid (s_axi_arvalid),
.up_axi_araddr (s_axi_araddr),
.up_axi_arready (s_axi_arready),
.up_axi_rvalid (s_axi_rvalid),
.up_axi_rresp (s_axi_rresp),
.up_axi_rdata (s_axi_rdata),
.up_axi_rready (s_axi_rready),
.up_wreq (up_wreq),
.up_waddr (up_waddr),
.up_wdata (up_wdata),
.up_wack (up_wack),
.up_rreq (up_rreq),
.up_raddr (up_raddr),
.up_rdata (up_rdata),
.up_rack (up_rack));
endmodule
// ***************************************************************************
// ***************************************************************************