pluto_hdl_adi/library/common/tb/tb_base.v

76 lines
2.4 KiB
Verilog

// ***************************************************************************
// ***************************************************************************
// Copyright (C) 2017-2023 Analog Devices, Inc. All rights reserved.
//
// In this HDL repository, there are many different and unique modules, consisting
// of various HDL (Verilog or VHDL) components. The individual modules are
// developed independently, and may be accompanied by separate and unique license
// terms.
//
// The user should read each of these license terms, and understand the
// freedoms and responsibilities that he or she has by using this source/core.
//
// This core is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
// A PARTICULAR PURPOSE.
//
// Redistribution and use of source or resulting binaries, with or without modification
// of this file, are permitted under one of the following two license terms:
//
// 1. The GNU General Public License version 2 as published by the
// Free Software Foundation, which can be found in the top level directory
// of this repository (LICENSE_GPL2), and also online at:
// <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
//
// OR
//
// 2. An ADI specific BSD license, which can be found in the top level directory
// of this repository (LICENSE_ADIBSD), and also on-line at:
// https://github.com/analogdevicesinc/hdl/blob/master/LICENSE_ADIBSD
// This will allow to generate bit files and not release the source code,
// as long as it attaches to an ADI device.
//
// ***************************************************************************
// ***************************************************************************
reg clk = 1'b0;
reg [3:0] reset_shift = 4'b1111;
reg trigger_reset = 1'b0;
wire reset;
reg failed = 1'b0;
initial
begin
$dumpfile (VCD_FILE);
$dumpvars;
`ifdef TIMEOUT
#`TIMEOUT
`else
#100000
`endif
if (failed == 1'b0)
$display("SUCCESS");
else
$display("FAILED");
$finish;
end
always @(*) #10 clk <= ~clk;
always @(posedge clk) begin
if (trigger_reset == 1'b1) begin
reset_shift <= 3'b111;
end else begin
reset_shift <= {reset_shift[2:0],1'b0};
end
end
assign reset = reset_shift[3];
task do_trigger_reset;
begin
@(posedge clk) trigger_reset <= 1'b1;
@(posedge clk) trigger_reset <= 1'b0;
end
endtask