diff options
Diffstat (limited to 'gr-sounder/src/fpga/lib/sounder.v')
| -rw-r--r-- | gr-sounder/src/fpga/lib/sounder.v | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/gr-sounder/src/fpga/lib/sounder.v b/gr-sounder/src/fpga/lib/sounder.v new file mode 100644 index 000000000..ea4007cb8 --- /dev/null +++ b/gr-sounder/src/fpga/lib/sounder.v @@ -0,0 +1,86 @@ +// -*- 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_rst_i,tx_enable_i,tx_strobe_i, + tx_dac_i_o,tx_dac_q_o, + rx_rst_i,rx_enable_i,rx_strobe_i,rx_strobe_o, + rx_adc_i_i,rx_adc_q_i,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 + input tx_rst_i; // Independent subsystem reset + input tx_enable_i; // Turn on transmitter functionality + input tx_strobe_i; // Generate an transmitter output sample + output [15:0] tx_dac_i_o; // I channel transmitter output to DAC + output [15:0] tx_dac_q_o; // Q channel transmitter output to DAC + + // Receive subsystem + input rx_rst_i; // Independent subsystem reset + input rx_enable_i; // Turn on receiver functionality + input rx_strobe_i; // Indicates receive sample ready from ADC + output rx_strobe_o; // Indicates output samples ready for Rx FIFO + input [15:0] rx_adc_i_i; // I channel input from ADC + input [15:0] rx_adc_q_i; // Q channel input from ADC + 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 + + // Configuration + wire [4:0] degree; // LFSR register length + wire [15:0] mask; // LFSR parity mask + wire [15:0] len; // PN code sequence length + wire loopback; // Enable digital loopback + + // Loopback implementation + wire [15:0] tx_i, tx_q, rx_i, rx_q; // Internal transmit and receive data bus + + assign tx_dac_i_o = loopback ? 16'b0 : tx_i; + assign tx_dac_q_o = loopback ? 16'b0 : tx_q; + assign rx_i = loopback ? tx_i : rx_adc_i_i; + assign rx_q = loopback ? tx_q : rx_adc_q_i; + + setting_reg #(`FR_USER_0) sr_lfsr_degree + ( .clock(clk_i),.reset(1'b0),.strobe(s_strobe_i),.addr(saddr_i),.in(sdata_i),.out(degree) ); + + setting_reg #(`FR_USER_1) sr_mode + ( .clock(clk_i),.reset(1'b0),.strobe(s_strobe_i),.addr(saddr_i),.in(sdata_i), + .out({loopback}) ); + + lfsr_constants constants(.degree_i(degree),.mask_o(mask),.len_o(len)); + + sounder_tx transmitter + ( .clk_i(clk_i),.rst_i(tx_rst_i),.ena_i(tx_enable_i),.strobe_i(tx_strobe_i),.mask_i(mask), + .tx_i_o(tx_i),.tx_q_o(tx_q) ); + + sounder_rx receiver + ( .clk_i(clk_i),.rst_i(rx_rst_i),.ena_i(rx_enable_i), + .rx_strobe_i(rx_strobe_i),.tx_strobe_i(tx_strobe_i),.mask_i(mask),.len_i(len), + .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), + .rx_strobe_o(rx_strobe_o) ); + +endmodule // sounder |