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// -*- 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
//
`include "../../../../usrp/firmware/include/fpga_regs_common.v"
`include "../../../../usrp/firmware/include/fpga_regs_standard.v"
module radar_rx(clk_i,rst_i,ena_i,strobe_i,saddr_i,sdata_i,s_strobe_i,
rx_in_i_i,rx_in_q_i,rx_i_o,rx_q_o,rx_strobe_o);
input clk_i;
input rst_i;
input ena_i;
input strobe_i;
input [6:0] saddr_i;
input [31:0] sdata_i;
input s_strobe_i;
input [15:0] rx_in_i_i;
input [15:0] rx_in_q_i;
output [15:0] rx_i_o;
output [15:0] rx_q_o;
output rx_strobe_o;
// Just count up for debugging
reg [31:0] counter;
always @(posedge clk_i)
begin
if (rst_i | ~ena_i)
counter <= 32'b0;
else if (strobe_i & rx_strobe_o)
counter <= counter + 32'b1;
end
assign rx_i_o = ena_i ? counter[31:16] : 16'b0;
assign rx_q_o = ena_i ? counter[15:0] : 16'b0;
// Temporarily we duplicate what master_control.v did to generate decim_strobe
// so we can do receive debugging. Later we'll drive rx_strobe_o in bursts to
// load receiver data into the rx fifo.
strobe_gen rx_strobe_gen
( .clock(clk_i),.reset(rst_i),.enable(ena_i),.rate(7),.strobe_in(strobe_i),.strobe(rx_strobe_o) );
endmodule // radar_rx
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