module ring_bcd4(Q,Init, Enable, Clk);
output [15:0] Q;
input Init;
input Enable;
input Clk;
parameter WIDTH=10;
function [3:0] decode_ring; //Good to 16 bits
 input  [WIDTH-1:0] Q;
 case (Q)
  1:     decode_ring = 0;
  2:     decode_ring = 1;
  4:     decode_ring = 2;
  8:     decode_ring = 3;
  16:    decode_ring = 4;
  32:    decode_ring = 5;
  64:    decode_ring = 6;
  128:   decode_ring = 7;
  256:   decode_ring = 8;
  512:   decode_ring = 9;
  1024:  decode_ring = 'hA;
  2048:  decode_ring = 'hB;
  4096:  decode_ring = 'hC;
  8192:  decode_ring = 'hD;
  16384: decode_ring = 'hE;
  32768: decode_ring = 'hF;
  default: decode_ring = 'hx;
 endcase
endfunction
wire [WIDTH - 1:0] Q1,Q2,Q3,Q4;
ring #(WIDTH) DUT1(Q1, Co1, Init, Enable, Clk);
ring #(WIDTH) DUT2(Q2, Co2, Init, Co1, Clk);
ring #(WIDTH) DUT3(Q3, Co3, Init, Co2, Clk);
ring #(WIDTH) DUT4(Q4, Co4, Init, Co3, Clk);
assign Q ={decode_ring(Q4),
           decode_ring(Q3),
	   decode_ring(Q2),
	   decode_ring(Q1)};
endmodule