diff options
Diffstat (limited to 'gr-sounder/src/fpga/lib/sounder_tx.v')
| -rw-r--r-- | gr-sounder/src/fpga/lib/sounder_tx.v | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/gr-sounder/src/fpga/lib/sounder_tx.v b/gr-sounder/src/fpga/lib/sounder_tx.v new file mode 100644 index 000000000..d5300fecb --- /dev/null +++ b/gr-sounder/src/fpga/lib/sounder_tx.v @@ -0,0 +1,45 @@ +// -*- 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" + +`define MAX_VALUE 16'h7FFF // 2s complement +`define MIN_VALUE 16'h8000 + +module sounder_tx(clk_i,rst_i,ena_i,strobe_i,mask_i,tx_i_o,tx_q_o); + input clk_i; + input rst_i; + input ena_i; + input strobe_i; + input [15:0] mask_i; + output [15:0] tx_i_o; + output [15:0] tx_q_o; + + wire pn; + + lfsr pn_code + ( .clk_i(clk_i),.rst_i(rst_i),.ena_i(ena_i),.strobe_i(strobe_i),.mask_i(mask_i),.pn_o(pn) ); + + assign tx_i_o = pn ? `MAX_VALUE : `MIN_VALUE; // Bipolar + assign tx_q_o = 16'b0; + +endmodule // sounder_tx |