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// -*- verilog -*-
//
// USRP - Universal Software Radio Peripheral
//
// Copyright (C) 2003 Matt Ettus
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Following defines conditionally include RX path circuitry
`include "usrp_std.vh"
module rx_chain
(input clock,
input reset,
input enable,
input wire [7:0] decim_rate,
input sample_strobe,
input decimator_strobe,
output wire hb_strobe,
input [6:0] serial_addr, input [31:0] serial_data, input serial_strobe,
input wire [15:0] i_in,
input wire [15:0] q_in,
output wire [15:0] i_out,
output wire [15:0] q_out,
output wire [15:0] debugdata,output wire [15:0] debugctrl
);
parameter FREQADDR = 0;
parameter PHASEADDR = 0;
wire [31:0] phase;
wire [15:0] bb_i, bb_q;
wire [15:0] hb_in_i, hb_in_q;
assign debugdata = hb_in_i;
`ifdef RX_NCO_ON
phase_acc #(FREQADDR,PHASEADDR,32) rx_phase_acc
(.clk(clock),.reset(reset),.enable(enable),
.serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe),
.strobe(sample_strobe),.phase(phase) );
cordic rx_cordic
( .clock(clock),.reset(reset),.enable(enable),
.xi(i_in),.yi(q_in),.zi(phase[31:16]),
.xo(bb_i),.yo(bb_q),.zo() );
`else
assign bb_i = i_in;
assign bb_q = q_in;
assign sample_strobe = 1;
`endif // !`ifdef RX_NCO_ON
`ifdef RX_CIC_ON
cic_decim cic_decim_i_0
( .clock(clock),.reset(reset),.enable(enable),
.rate(decim_rate),.strobe_in(sample_strobe),.strobe_out(decimator_strobe),
.signal_in(bb_i),.signal_out(hb_in_i) );
`else
assign hb_in_i = bb_i;
assign decimator_strobe = sample_strobe;
`endif
`ifdef RX_HB_ON
halfband_decim hbd_i_0
( .clock(clock),.reset(reset),.enable(enable),
.strobe_in(decimator_strobe),.strobe_out(hb_strobe),
.data_in(hb_in_i),.data_out(i_out),.debugctrl(debugctrl) );
`else
assign i_out = hb_in_i;
assign hb_strobe = decimator_strobe;
`endif
`ifdef RX_CIC_ON
cic_decim cic_decim_q_0
( .clock(clock),.reset(reset),.enable(enable),
.rate(decim_rate),.strobe_in(sample_strobe),.strobe_out(decimator_strobe),
.signal_in(bb_q),.signal_out(hb_in_q) );
`else
assign hb_in_q = bb_q;
`endif
`ifdef RX_HB_ON
halfband_decim hbd_q_0
( .clock(clock),.reset(reset),.enable(enable),
.strobe_in(decimator_strobe),.strobe_out(),
.data_in(hb_in_q),.data_out(q_out) );
`else
assign q_out = hb_in_q;
`endif
endmodule // rx_chain
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