1 files changed, 74 insertions, 0 deletions
diff --git a/picosoc/testbench.v b/picosoc/testbench.v
new file mode 100644
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+++ b/picosoc/testbench.v
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+/*
+ *  PicoSoC - A simple example SoC using PicoRV32
+ *
+ *  Copyright (C) 2017  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+module testbench;
+	reg clk = 1;
+	always #5 clk = ~clk;
+
+	initial begin
+		$dumpfile("testbench.vcd");
+		$dumpvars(0, testbench);
+		repeat (100000) @(posedge clk);
+		$display("");
+		$display("[TIMEOUT]");
+		$stop;
+	end
+
+	wire [31:0] gpio_i = 0;
+	wire [31:0] gpio_o;
+
+	wire flash_csb;
+	wire flash_clk;
+	wire flash_io0;
+	wire flash_io1;
+	wire flash_io2;
+	wire flash_io3;
+
+	always @(gpio_o) begin
+		$write("<GPIO:%02x>", gpio_o[7:0]);
+		if (gpio_o == 63) begin
+			$display("[OK]");
+			$finish;
+		end
+		if (gpio_o % 8 == 7) begin
+			$display("");
+		end
+	end
+
+	picosoc uut (
+		.clk      (clk      ),
+		.gpio_i   (gpio_i   ),
+		.gpio_o   (gpio_o   ),
+		.flash_csb(flash_csb),
+		.flash_clk(flash_clk),
+		.flash_io0(flash_io0),
+		.flash_io1(flash_io1),
+		.flash_io2(flash_io2),
+		.flash_io3(flash_io3)
+	);
+
+	spiflash spiflash (
+		.csb(flash_csb),
+		.clk(flash_clk),
+		.io0(flash_io0),
+		.io1(flash_io1),
+		.io2(flash_io2),
+		.io3(flash_io3)
+	);
+endmodule