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// SPDX-FileCopyrightText: 2020 Efabless Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// SPDX-License-Identifier: Apache-2.0
`default_nettype none
`timescale 1 ns / 1 ps
module wb_port_tb;
reg clock;
reg RSTB;
reg CSB;
reg power1, power2;
reg power3, power4;
tri gpio;
wire [37:0] mprj_io;
wire [7:0] mprj_io_0;
wire [15:0] checkbits;
assign checkbits = mprj_io[31:16];
assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
// External clock is used by default. Make this artificially fast for the
// simulation. Normally this would be a slow clock and the digital PLL
// would be the fast clock.
always #12.5 clock <= (clock === 1'b0);
initial begin
clock = 0;
end
pullup(mprj_io[3]);
`ifdef WFDUMP
initial begin
$dumpfile("simx.vcd");
$dumpvars(1, wb_port_tb);
$dumpvars(2, wb_port_tb.u_top);
$dumpvars(1, wb_port_tb.u_top.mgmt_buffers);
$dumpvars(1, wb_port_tb.u_top.housekeeping);
$dumpvars(1, wb_port_tb.u_top.pll);
$dumpvars(1, wb_port_tb.u_top.soc);
$dumpvars(1, wb_port_tb.u_top.soc.core);
$dumpvars(1, wb_port_tb.u_top.mprj);
$dumpvars(1, wb_port_tb.u_top.mprj.u_wb_host);
//$dumpvars(2, wb_port_tb.u_top.mprj.u_pinmux);
end
`endif
initial begin
// Repeat cycles of 1000 clock edges as needed to complete testbench
repeat (30) begin
repeat (2000) @(posedge clock);
// $display("+1000 cycles");
end
$display("%c[1;31m",27);
$display ("##########################################################");
`ifdef GL
$display ("Monitor: Timeout, %m (GL) Failed");
`else
$display ("Monitor: Timeout, %m (RTL) Failed");
`endif
$display ("##########################################################");
$display("%c[0m",27);
$finish;
end
initial begin
init();
wait(checkbits == 16'h AB60);
$display("Monitor: MPRJ-Logic WB Started");
wait(checkbits == 16'h AB6A);
$display ("##########################################################");
`ifdef GL
$display("Monitor: %m (GL) Passed");
`else
$display("Monitor: %m (RTL) Passed");
`endif
$display ("##########################################################");
$finish;
end
initial begin
CSB <= 1'b1; // Force CSB high
#2000;
#170000;
CSB = 1'b0; // CSB can be released
end
initial begin // Power-up sequence
power1 <= 1'b0;
power2 <= 1'b0;
power3 <= 1'b0;
power4 <= 1'b0;
#100;
power1 <= 1'b1;
#100;
power2 <= 1'b1;
#100;
power3 <= 1'b1;
#100;
power4 <= 1'b1;
end
//always @(mprj_io) begin
// #1 $display("MPRJ-IO state = %b ", mprj_io[7:0]);
//end
wire flash_csb;
wire flash_clk;
wire flash_io0;
wire flash_io1;
wire VDD3V3 = power1;
wire VDD1V8 = power2;
wire USER_VDD3V3 = power3;
wire USER_VDD1V8 = power4;
wire VSS = 1'b0;
caravel u_top (
.vddio (VDD3V3),
.vssio (VSS),
.vdda (VDD3V3),
.vssa (VSS),
.vccd (VDD1V8),
.vssd (VSS),
.vdda1 (USER_VDD3V3),
.vdda2 (USER_VDD3V3),
.vssa1 (VSS),
.vssa2 (VSS),
.vccd1 (USER_VDD1V8),
.vccd2 (USER_VDD1V8),
.vssd1 (VSS),
.vssd2 (VSS),
.clock (clock),
.gpio (gpio),
.mprj_io (mprj_io),
.flash_csb(flash_csb),
.flash_clk(flash_clk),
.flash_io0(flash_io0),
.flash_io1(flash_io1),
.resetb (RSTB)
);
spiflash #(
.FILENAME("wb_port.hex")
) spiflash (
.csb(flash_csb),
.clk(flash_clk),
.io0(flash_io0),
.io1(flash_io1),
.io2(), // not used
.io3() // not used
);
`ifndef GL // Drive Power for Hold Fix Buf
// All standard cell need power hook-up for functionality work
initial begin
end
`endif
`include "caravel_task.sv"
endmodule
`default_nettype wire