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Diffstat (limited to 'gr-gpio/src/fpga/lib/integ_shifter.v')
-rw-r--r--gr-gpio/src/fpga/lib/integ_shifter.v68
1 files changed, 0 insertions, 68 deletions
diff --git a/gr-gpio/src/fpga/lib/integ_shifter.v b/gr-gpio/src/fpga/lib/integ_shifter.v
deleted file mode 100644
index 1ad0504cb..000000000
--- a/gr-gpio/src/fpga/lib/integ_shifter.v
+++ /dev/null
@@ -1,68 +0,0 @@
-// -*- verilog -*-
-//
-// USRP - Universal Software Radio Peripheral
-//
-// Copyright (C) 2003 Matt Ettus
-// Copyright (C) 2008 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
-//
-
-
-// NOTE: This only works for a max decim rate of 256
-// NOTE: Signal "rate" is ONE LESS THAN the actual rate
-
-module integ_shifter(rate,signal_in,signal_out);
- parameter bw = 16;
- parameter maxbitgain = 8;
-
- input [7:0] rate;
- input wire [bw+maxbitgain-1:0] signal_in;
- output reg [bw-1:0] signal_out;
-
- reg [3:0] bitgain;
-
- // Nearest without overflow -- ceil(log2(rate+1))
- always @*
- if (rate >= 8'd128)
- bitgain = 8;
- else if (rate >= 8'd64)
- bitgain = 7;
- else if (rate >= 8'd32)
- bitgain = 6;
- else if (rate >= 8'd16)
- bitgain = 5;
- else if (rate >= 8'd8)
- bitgain = 4;
- else if (rate >= 8'd4)
- bitgain = 3;
- else if (rate >= 8'd2)
- bitgain = 2;
- else
- bitgain = 1;
-
- always @*
- case(bitgain)
- 5'd1 : signal_out = signal_in[1+bw-1:1];
- 5'd2 : signal_out = signal_in[2+bw-1:2];
- 5'd3 : signal_out = signal_in[3+bw-1:3];
- 5'd4 : signal_out = signal_in[4+bw-1:4];
- 5'd5 : signal_out = signal_in[5+bw-1:5];
- 5'd6 : signal_out = signal_in[6+bw-1:6];
- 5'd7 : signal_out = signal_in[7+bw-1:7];
- default : signal_out = signal_in[8+bw-1:8];
- endcase // case(shift)
-
-endmodule // integ_shifter