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-rw-r--r--fpga/usrp2/custom/custom_dsp_rx.v71
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diff --git a/fpga/usrp2/custom/custom_dsp_rx.v b/fpga/usrp2/custom/custom_dsp_rx.v
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-//
-// Copyright 2012 Ettus Research 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 3 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, see <http://www.gnu.org/licenses/>.
-//
-
-//COPY ME, CUSTOMIZE ME...
-
-//The following module effects the IO of the DDC chain.
-//By default, this entire module is a simple pass-through.
-
-//To implement DSP logic before the DDC:
-//Implement custom DSP between frontend and ddc input.
-
-//To implement DSP logic after the DDC:
-//Implement custom DSP between ddc output and baseband.
-
-//To bypass the DDC with custom logic:
-//Implement custom DSP between frontend and baseband.
-
-module custom_dsp_rx
-#(
- //frontend bus width
- parameter WIDTH = 24
-)
-(
- //control signals
- input clock, //dsp clock
- input reset, //active high synchronous reset
- input clear, //active high on packet control init
- input enable, //active high when streaming enabled
-
- //user settings bus, controlled through user setting regs API
- input set_stb, input [7:0] set_addr, input [31:0] set_data,
-
- //full rate inputs directly from the RX frontend
- input [WIDTH-1:0] frontend_i,
- input [WIDTH-1:0] frontend_q,
-
- //full rate outputs directly to the DDC chain
- output [WIDTH-1:0] ddc_in_i,
- output [WIDTH-1:0] ddc_in_q,
-
- //strobed samples {I16,Q16} from the RX DDC chain
- input [31:0] ddc_out_sample,
- input ddc_out_strobe, //high on valid sample
- output ddc_out_enable, //enables DDC module
-
- //strobbed baseband samples {I16,Q16} from this module
- output [31:0] bb_sample,
- output bb_strobe //high on valid sample
-);
-
- assign ddc_in_i = frontend_i;
- assign ddc_in_q = frontend_q;
- assign bb_sample = ddc_out_sample;
- assign bb_strobe = ddc_out_strobe;
- assign ddc_out_enable = enable;
-
-endmodule //custom_dsp_rx