//`timescale 1ns / 1ns
module tb();
    logic  clk;
    logic  clk_enable;
    logic  reset;
    logic [63:0] fcw;
    logic [63:0] ptw;
    logic 	 clr;
    logic [63:0] acc;
    logic [63:0] result_cos;
    logic [63:0] result_sin;
    logic [63:0] result_acc;

initial
begin
     $fsdbDumpfile("TB.fsdb");
     $fsdbDumpvars(0, tb);
end

    logic [21:0]	cnt;
always@(posedge clk or negedge reset)begin
		if(reset)
			cnt	<=	22'd0;
		else
			cnt	<=	cnt + 22'd1;
end
initial	begin
	wait(cnt[14]==1'b1)
			$finish(0);
end

initial	begin
		#0;
		reset = 1'b1;
		#100;
		reset = 1'b0;				
end
//clk
initial	begin
		#0;
		clk = 1'b1;			
end
always #5 clk = ~clk;

initial begin
	#0;
	clk_enable = 1'b1;
	clr	   = 1'b0;
	fcw 		= 48'h0010_0000_0000;
	ptw 		= 16'h0;
	acc 		= 16'h0;
end
logic [63:0] acc_reg;
always@(posedge clk or negedge reset)begin
		if(reset)
			acc_reg	<=	63'd0;
		else
			acc_reg	<=	result_acc + fcw;
end

nco_dpi inst_nco_dpi(
.clk(clk),
.clk_enable(clk_enable),
.reset(reset),
.fcw(fcw),
.ptw(ptw),
.clr(clr),
.acc(acc_reg),
.result_cos(result_cos),
.result_sin(result_sin),
.result_acc(result_acc)
);


endmodule