Subversion Repositories simon_core

`timescale 1ns / 1ps
 
////////////////////////////////////////////////////////////////////////////////
// Team: Virginia Tech Secure Embedded Systems (SES) Lab 
// Implementer: Ege Gulcan
//
// Create Date:   19:49:46 11/13/2013
// Design Name:   top_module
// Module Name:   top_module_test.v
// Project Name:  SIMON
// Target Device:  
// Tool versions:  
// Description: 
//
// Verilog Test Fixture created by ISE for module: top_module
//
// Dependencies:
// 
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
// 
////////////////////////////////////////////////////////////////////////////////
 
module top_module_test;
 
	// Inputs
	reg clk;
	reg data_in;
	reg [1:0] data_rdy;
 
	// Outputs
	wire cipher_out;
 
	// Plaintext and key from the NSA Simon and Speck paper
	reg [127:0] plaintext = 128'h63736564207372656c6c657661727420;
	reg [127:0] key = 128'h0f0e0d0c0b0a09080706050403020100;
 
	integer i;
 
	// Instantiate the Unit Under Test (UUT)
	top_module uut (
		.clk(clk), 
		.data_in(data_in), 
		.data_rdy(data_rdy), 
		.cipher_out(cipher_out)
	);
 
	initial begin
		// Initialize Inputs
		clk = 0;
		data_in = 0;
		data_rdy = 0;
 
		#110;
		#5;
		//Set data_rdy=1 to load plaintext
		data_rdy=1;
 
		//Loads the plaintext one bit per clock cycle for 128 cycles
		for(i=0;i<128;i = i+1)
		begin
			data_in = plaintext[i];
			#20;
		end
 
		//Set data_rdy=2 to load key
		data_rdy = 2;
 
		//Loads the key one bit per clock cycle for 128 cycles
		for(i=0;i<128;i = i+1)
		begin
			data_in = key[i];
			#20;
		end
		//Set data_rdy=0 after loading is done
		data_rdy = 0;
		#20;
 
		//Keep data_rdy=3 while the cipher is running
		data_rdy = 3;
 
 
	end
 
 
 
	always #10 clk = ~clk;
 
 
 
endmodule