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Diffstat (limited to 'sdr_lib/phase_acc.v')
-rwxr-xr-x | sdr_lib/phase_acc.v | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/sdr_lib/phase_acc.v b/sdr_lib/phase_acc.v new file mode 100755 index 000000000..d00716fd0 --- /dev/null +++ b/sdr_lib/phase_acc.v @@ -0,0 +1,52 @@ +// -*- 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 +// + + + +// Basic Phase accumulator for DDS + + +module phase_acc (clk,reset,enable,strobe,serial_addr,serial_data,serial_strobe,phase); + parameter FREQADDR = 0; + parameter PHASEADDR = 0; + parameter resolution = 32; + + input clk, reset, enable, strobe; + input [6:0] serial_addr; + input [31:0] serial_data; + input serial_strobe; + + output reg [resolution-1:0] phase; + wire [resolution-1:0] freq; + + setting_reg #(FREQADDR) sr_rxfreq0(.clock(clk),.reset(1'b0),.strobe(serial_strobe),.addr(serial_addr),.in(serial_data),.out(freq)); + + always @(posedge clk) + if(reset) + phase <= #1 32'b0; + else if(serial_strobe & (serial_addr == PHASEADDR)) + phase <= #1 serial_data; + else if(enable & strobe) + phase <= #1 phase + freq; + +endmodule // phase_acc + + |