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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
`include "uprj_netlists.v"
`include "caravel_netlists.v"
`include "spiflash.v"
`include "tbuart.v"
module testPrint_tb;
reg clock;
reg RSTB;
reg CSB;
reg power1, power2;
wire gpio;
wire uart_tx;
wire [37:0] mprj_io;
wire [15:0] checkbits;
assign checkbits = mprj_io[31:16];
assign uart_tx = mprj_io[6];
always #12.5 clock <= (clock === 1'b0);
initial begin
clock = 0;
end
assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
initial begin
$dumpfile("testPrint.vcd");
$dumpvars(0, testPrint_tb);
// TIP. Increase the first repeat number until it is needed
// Repeat cycles of 1000 clock edges as needed to complete testbench
repeat (100) begin
repeat (1000) @(posedge clock);
// $display("+1000 cycles");
end
$display("%c[1;31m",27);
`ifdef GL
$display ("Monitor: Timeout, Test Output (print) to Elpis (GL) Failed");
`else
$display ("Monitor: Timeout, Test Output (print) to Elpis (RTL) Failed");
`endif
$display("%c[0m",27);
$finish;
end
initial begin
$display("Test 1 (Output (print) to Elpis) started");
wait(testPrint_tb.uut.mprj.la_data_out[100] == 1'b1);
wait(testPrint_tb.uut.mprj.wbs_dat_o == 'd2);
$display("%c[1;32m",27);
$display("Test 1 (Output (print) to Elpis) Finished correctly");
$display("%c[0m",27);
#1;
$finish;
end
// TIP. Dumping of memory addresses. Do something similar with registers
`ifdef RTL
integer i_mem;
initial begin
for (i_mem = 0; i_mem < 512; i_mem = i_mem + 1) begin
$dumpvars(0, testPrint_tb.uut.mprj.custom_sram.mem[i_mem]);
end
end
integer i_reg;
initial begin
for (i_reg = 0; i_reg < 32; i_reg = i_reg + 1) begin
$dumpvars(0, testPrint_tb.uut.mprj.core0.datapath.regfile.registers[i_reg]);
end
end
`endif
initial begin
RSTB <= 1'b0;
CSB <= 1'b1; // Force CSB high
#2000;
RSTB <= 1'b1; // Release reset
#170000;
CSB = 1'b0; // CSB can be released
end
initial begin // Power-up sequence
power1 <= 1'b0;
power2 <= 1'b0;
#200;
power1 <= 1'b1;
#200;
power2 <= 1'b1;
end
wire flash_csb;
wire flash_clk;
wire flash_io0;
wire flash_io1;
wire VDD1V8;
wire VDD3V3;
wire VSS;
assign VDD3V3 = power1;
assign VDD1V8 = power2;
assign VSS = 1'b0;
caravel uut (
.vddio (VDD3V3),
.vssio (VSS),
.vdda (VDD3V3),
.vssa (VSS),
.vccd (VDD1V8),
.vssd (VSS),
.vdda1 (VDD3V3),
.vdda2 (VDD3V3),
.vssa1 (VSS),
.vssa2 (VSS),
.vccd1 (VDD1V8),
.vccd2 (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("testPrint.hex")
) spiflash (
.csb(flash_csb),
.clk(flash_clk),
.io0(flash_io0),
.io1(flash_io1),
.io2(), // not used
.io3() // not used
);
// Testbench UART
tbuart tbuart (
.ser_rx(uart_tx)
);
endmodule
`default_nettype wire