//
// Title       : 4-16 decoder test fixture
// Author      : Carl Ebeling
// Company     : CSE 370
//
//-------------------------------------------------------------------------------------------------
//
// File        : decode4_16_tf.v
//
// Description : This test fixture tests the 4-16 Decoder
//
//-------------------------------------------------------------------------------------------------
`timescale 1ns / 1ns


module decode4_16_tf (A, En, Q);

output [3:0] A;		
output En;
input [15:0] Q;
reg [3:0] A; 
reg En;

integer	errors;
integer count;

initial	begin  
	errors = 0;	   
	for (count = 0; count < 32; count = count + 1) begin
		{ A, En } = count;
		#10	// Wait 10 ns.
		if (Q != (En<<A)) begin
			$display("***Error***  A:%d, Q:%b", A, Q); 
			errors = errors + 1;  
			$stop;		// Stop simulation so we can see what's going on.
						// We can continue simulation after $stop
		end
		
	end
	if (errors == 0) $display("Test passed - No errors!!");
		else $display("**** %d Errors****", errors);
end
	
endmodule