ADD: Print BlackBox

src/main/resources/vsrc/BytePrinter.v

@@ -0,0 +1,36 @@
+module BytePrinter
+#(
+    parameter FILE_NAME = "byte_printer.txt"
+)
+(
+    input clk,
+    input reset,
+    input in_valid,
+    input[7:0] in_byte
+);
+
+`ifdef VCS
+
+integer file;
+
+initial begin
+    file = $fopen(FILE_NAME, "w");
+    if (file == 0) begin
+        $display("Failed to open byte_printer.txt");
+        $finish;
+    end
+end
+
+always @(posedge clk) begin
+    if (in_valid & ~reset) begin
+        $fwrite(file, "%c", in_byte);
+    end
+end 
+
+final begin
+    $fclose(file);
+end
+
+`endif
+
+endmodule