--- /dev/null
+// -*- verilog -*-
+//
+// USRP - Universal Software Radio Peripheral
+//
+// Copyright (C) 2007 Corgan Enterprises LLC
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301 USA
+//
+
+module cordic_nco(clk_i,rst_i,ena_i,strobe_i,ampl_i,freq_i,phs_i,data_i_o,data_q_o);
+ input clk_i;
+ input rst_i;
+ input ena_i;
+ input strobe_i;
+
+ input [15:0] ampl_i;
+ input [31:0] freq_i;
+ input [31:0] phs_i;
+
+ output [15:0] data_i_o;
+ output [15:0] data_q_o;
+
+ reg [31:0] phase_reg;
+ wire [31:0] phase = phase_reg + phs_i;
+ wire [15:0] ampl;
+
+ always @(posedge clk_i)
+ begin
+ if (rst_i | ~ena_i)
+ phase_reg <= 32'b0;
+ else if (strobe_i)
+ phase_reg <= phase_reg + freq_i;
+ end
+
+ assign ampl = ena_i ? ampl_i : 16'b0;
+
+ cordic tx_cordic
+ (.clock(clk_i),.reset(rst_in),.enable(strobe_i),
+ .xi(ampl),.yi(16'b0),.zi(phase[31:16]),
+ .xo(data_i_o),.yo(data_q_o),.zo());
+
+endmodule // cordic_nco