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-rw-r--r--gr-sounder/src/fpga/lib/sounder.v90
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diff --git a/gr-sounder/src/fpga/lib/sounder.v b/gr-sounder/src/fpga/lib/sounder.v
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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 sounder(clk_i, saddr_i, sdata_i, s_strobe_i,
- tx_strobe_o, tx_dac_i_o, tx_dac_q_o,
- rx_adc_i_i,rx_adc_q_i,
- rx_strobe_o, rx_imp_i_o,rx_imp_q_o);
-
- // System interface
- input clk_i; // Master clock @ 64 MHz
- input [6:0] saddr_i; // Configuration bus address
- input [31:0] sdata_i; // Configuration bus data
- input s_strobe_i; // Configuration bus write
-
- // Transmit subsystem
- output tx_strobe_o; // Generate an transmitter output sample
- output [13:0] tx_dac_i_o; // I channel transmitter output to DAC
- output [13:0] tx_dac_q_o; // Q channel transmitter output to DAC
-
- // Receive subsystem
- output rx_strobe_o; // Indicates output samples ready for Rx FIFO
- input [15:0] rx_adc_i_i; // I channel input from ADC interface module
- input [15:0] rx_adc_q_i; // Q channel input from ADC interface module
- output [15:0] rx_imp_i_o; // I channel impulse response to Rx FIFO
- output [15:0] rx_imp_q_o; // Q channel impulse response to Rx FIFO
-
- // Internal variables
- wire reset;
- wire transmit;
- wire receive;
- wire loopback;
-
- wire [4:0] degree;
- wire [13:0] ampl;
- wire [15:0] mask;
-
- wire ref_strobe;
- wire sum_strobe;
- sounder_ctrl master(.clk_i(clk_i),.rst_i(reset),.saddr_i(saddr_i),
- .sdata_i(sdata_i),.s_strobe_i(s_strobe_i),
- .reset_o(reset),.transmit_o(transmit),.receive_o(receive),.loopback_o(loopback),
- .degree_o(degree),.ampl_o(ampl),.mask_o(mask),.tx_strobe_o(tx_strobe_o),
- .rx_strobe_o(rx_strobe_o),.sum_strobe_o(sum_strobe),.ref_strobe_o(ref_strobe));
-
- // Loopback implementation
- wire [13:0] tx_i, tx_q;
- wire [15:0] tx_i_ext, tx_q_ext;
- wire [15:0] rx_i, rx_q;
-
- sign_extend #(14,16) tx_i_extender(tx_i, tx_i_ext);
- sign_extend #(14,16) tx_q_extender(tx_q, tx_q_ext);
-
- assign tx_dac_i_o = loopback ? 14'b0 : tx_i;
- assign tx_dac_q_o = loopback ? 14'b0 : tx_q;
- assign rx_i = loopback ? tx_i_ext : rx_adc_i_i;
- assign rx_q = loopback ? tx_q_ext : rx_adc_q_i;
-
- sounder_tx transmitter
- ( .clk_i(clk_i),.rst_i(reset),.ena_i(transmit),
- .strobe_i(tx_strobe_o),.mask_i(mask),.ampl_i(ampl),
- .tx_i_o(tx_i),.tx_q_o(tx_q) );
-
- sounder_rx receiver
- ( .clk_i(clk_i),.rst_i(reset),.ena_i(receive),
- .sum_strobe_i(sum_strobe),.ref_strobe_i(ref_strobe),
- .mask_i(mask),.degree_i(degree),
- .rx_in_i_i(rx_i),.rx_in_q_i(rx_q),.rx_i_o(rx_imp_i_o),.rx_q_o(rx_imp_q_o));
-
-endmodule // sounder