pluto_hdl_adi/library/axi_dmac/tb/dma_write_tb.v

193 lines
5.1 KiB
Verilog

// ***************************************************************************
// ***************************************************************************
// Copyright 2018 (c) 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.
//
// ***************************************************************************
// ***************************************************************************
`timescale 1ns/100ps
module dmac_dma_write_tb;
parameter VCD_FILE = {`__FILE__,"cd"};
parameter WIDTH_DEST = 32;
parameter WIDTH_SRC = 32;
parameter REQ_LEN_INC = 4;
parameter REQ_LEN_INIT = 4;
`include "tb_base.v"
localparam TRANSFER_ADDR = 32'h80000000;
reg req_valid = 1'b1;
wire req_ready;
reg [23:0] req_length = REQ_LEN_INIT - 1;
wire awvalid;
wire awready;
wire [31:0] awaddr;
wire [7:0] awlen;
wire [2:0] awsize;
wire [1:0] awburst;
wire [2:0] awprot;
wire [3:0] awcache;
wire wlast;
wire wvalid;
wire wready;
wire [WIDTH_DEST/8-1:0] wstrb;
wire [WIDTH_DEST-1:0] wdata;
reg [WIDTH_SRC-1:0] fifo_wr_din = 'b0;
reg fifo_wr_rq = 'b0;
wire fifo_wr_xfer_req;
wire bready;
wire bvalid;
wire [1:0] bresp;
always @(posedge clk) begin
if (reset != 1'b1 && req_ready == 1'b1) begin
req_valid <= 1'b1;
req_length <= req_length + REQ_LEN_INC;
end
end
axi_write_slave #(
.DATA_WIDTH(WIDTH_DEST)
) i_write_slave (
.clk(clk),
.reset(reset),
.awvalid(awvalid),
.awready(awready),
.awaddr(awaddr),
.awlen(awlen),
.awsize(awsize),
.awburst(awburst),
.awprot(awprot),
.awcache(awcache),
.wready(wready),
.wvalid(wvalid),
.wdata(wdata),
.wstrb(wstrb),
.wlast(wlast),
.bvalid(bvalid),
.bready(bready),
.bresp(bresp)
);
axi_dmac_transfer #(
.DMA_DATA_WIDTH_SRC(WIDTH_SRC),
.DMA_DATA_WIDTH_DEST(WIDTH_DEST),
.DMA_LENGTH_ALIGN($clog2(WIDTH_SRC/8))
) i_transfer (
.m_dest_axi_aclk (clk),
.m_dest_axi_aresetn(resetn),
.m_axi_awvalid(awvalid),
.m_axi_awready(awready),
.m_axi_awaddr(awaddr),
.m_axi_awlen(awlen),
.m_axi_awsize(awsize),
.m_axi_awburst(awburst),
.m_axi_awprot(awprot),
.m_axi_awcache(awcache),
.m_axi_wready(wready),
.m_axi_wvalid(wvalid),
.m_axi_wdata(wdata),
.m_axi_wstrb(wstrb),
.m_axi_wlast(wlast),
.m_axi_bvalid(bvalid),
.m_axi_bready(bready),
.m_axi_bresp(bresp),
.ctrl_clk(clk),
.ctrl_resetn(resetn),
.ctrl_enable(1'b1),
.ctrl_pause(1'b0),
.req_eot(eot),
.req_response_ready(1'b1),
.req_valid(req_valid),
.req_ready(req_ready),
.req_dest_address(TRANSFER_ADDR[31:$clog2(WIDTH_DEST/8)]),
.req_src_address(TRANSFER_ADDR[31:$clog2(WIDTH_SRC/8)]),
.req_x_length(req_length),
.req_y_length(24'h00),
.req_dest_stride(24'h00),
.req_src_stride(24'h00),
.req_sync_transfer_start(1'b0),
.fifo_wr_clk(clk),
.fifo_wr_en(fifo_wr_en),
.fifo_wr_din(fifo_wr_din),
.fifo_wr_overflow(fifo_wr_overflow),
.fifo_wr_sync(1'b1),
.fifo_wr_xfer_req(fifo_wr_xfer_req)
);
always @(posedge clk) begin: fifo_wr
integer i;
if (reset == 1'b1) begin
for (i = 0; i < WIDTH_SRC; i = i + 8) begin
fifo_wr_din[i+:8] <= i / 8;
end
fifo_wr_rq <= 'b0;
end else begin
if (fifo_wr_en == 1'b1) begin
for (i = 0; i < WIDTH_SRC; i = i + 8) begin
fifo_wr_din[i+:8] <= fifo_wr_din[i+:8] + WIDTH_SRC / 8;
end
end
fifo_wr_rq <= (($random % 4) == 0);
end
end
assign fifo_wr_en = fifo_wr_rq & fifo_wr_xfer_req;
always @(posedge clk) begin
if (reset) begin
failed <= 'b0;
end else begin
failed <= failed |
i_write_slave.failed |
fifo_wr_overflow;
end
end
endmodule