//--------------------------------------------------------------------------------

// encoder_tb.v

// Konstantin Pavlov, pavlovconst@gmail.com

//--------------------------------------------------------------------------------

// INFO --------------------------------------------------------------------------------

//

//

`timescale 1ns / 1ps

module encoder_tb();

reg clk200;

initial begin

#0 clk200 = 1;

forever

#2.5 clk200 = ~clk200;

end

reg rst;

initial begin

#10.2 rst = 1;

#5 rst = 0;

//#10000;

forever begin

#9985 rst = ~rst;

#5 rst = ~rst;

end

end

wire nrst = ~rst;

wire [31:0] DerivedClocks;

ClkDivider CD1 (

.clk(clk200),

.nrst(nrst),

.out(DerivedClocks[31:0]));

defparam CD1.WIDTH = 32;

wire [31:0] E_DerivedClocks;

EdgeDetect ED1 (

.clk(clk200),

.nrst(nrst),

.in(DerivedClocks[31:0]),

.rising(E_DerivedClocks[31:0]),

.falling(),

.both()

);

defparam ED1.WIDTH = 32;

wire [15:0] RandomNumber1;

reg rst_once;

initial begin

#10.2 rst_once = 1;

#5 rst_once = 0;

end

c_rand RNG1 (

.clk(clk200),

.rst(rst_once),

.reseed(1'b0),

.seed_val(DerivedClocks[15:0]),

.out(RandomNumber1[15:0]));

reg start;

initial begin

#100.2 start = 1;

#5 start = 0;

end

//=================================================

wire p,m;

encoder E1(

.clk(clk200),

.nrst(nrst),

.incA(RandomNumber1[0]),

.incB(RandomNumber1[1]),

.plus1(p),

.minus1(m)

);

endmodule