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-rw-r--r--fpga/usrp2/fifo/fifo36_to_ll8.v92
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diff --git a/fpga/usrp2/fifo/fifo36_to_ll8.v b/fpga/usrp2/fifo/fifo36_to_ll8.v
deleted file mode 100644
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--- a/fpga/usrp2/fifo/fifo36_to_ll8.v
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@@ -1,92 +0,0 @@
-//
-// Copyright 2011 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/>.
-//
-
-
-module fifo36_to_ll8
- (input clk, input reset, input clear,
- input [35:0] f36_data,
- input f36_src_rdy_i,
- output f36_dst_rdy_o,
-
- output [7:0] ll_data,
- output ll_sof,
- output ll_eof,
- output ll_src_rdy,
- input ll_dst_rdy,
-
- output [31:0] debug);
-
- // Shortfifo on input to guarantee no deadlock
- wire [35:0] f36_data_int;
- wire f36_src_rdy_int, f36_dst_rdy_int;
- reg [7:0] ll_data_int;
- wire ll_sof_int, ll_eof_int, ll_src_rdy_int, ll_dst_rdy_int;
-
- fifo_short #(.WIDTH(36)) head_fifo
- (.clk(clk),.reset(reset),.clear(clear),
- .datain(f36_data), .src_rdy_i(f36_src_rdy_i), .dst_rdy_o(f36_dst_rdy_o),
- .dataout(f36_data_int), .src_rdy_o(f36_src_rdy_int), .dst_rdy_i(f36_dst_rdy_int),
- .space(),.occupied() );
-
- // Actual fifo36 to ll8, can deadlock if not connected to shortfifo
- wire [1:0] f36_occ_int = f36_data_int[35:34];
- wire f36_sof_int = f36_data_int[32];
- wire f36_eof_int = f36_data_int[33];
- wire advance, end_early;
- reg [1:0] state;
-
- assign debug = {29'b0,state};
-
- always @(posedge clk)
- if(reset)
- state <= 0;
- else
- if(advance)
- if(ll_eof_int)
- state <= 0;
- else
- state <= state + 1;
-
- always @*
- case(state)
- 0 : ll_data_int = f36_data_int[31:24];
- 1 : ll_data_int = f36_data_int[23:16];
- 2 : ll_data_int = f36_data_int[15:8];
- 3 : ll_data_int = f36_data_int[7:0];
- default : ll_data_int = f36_data_int[31:24];
- endcase // case (state)
-
- assign ll_sof_int = (state==0) & f36_sof_int;
- assign ll_eof_int = f36_eof_int & (((state==0)&(f36_occ_int==1)) |
- ((state==1)&(f36_occ_int==2)) |
- ((state==2)&(f36_occ_int==3)) |
- (state==3));
-
- assign ll_src_rdy_int = f36_src_rdy_int;
-
- assign advance = ll_src_rdy_int & ll_dst_rdy_int;
- assign f36_dst_rdy_int= advance & ((state==3)|ll_eof_int);
-
- // Short FIFO on output to guarantee no deadlock
- ll8_shortfifo tail_fifo
- (.clk(clk), .reset(reset), .clear(clear),
- .datain(ll_data_int), .sof_i(ll_sof_int), .eof_i(ll_eof_int),
- .error_i(0), .src_rdy_i(ll_src_rdy_int), .dst_rdy_o(ll_dst_rdy_int),
- .dataout(ll_data), .sof_o(ll_sof), .eof_o(ll_eof),
- .error_o(), .src_rdy_o(ll_src_rdy), .dst_rdy_i(ll_dst_rdy));
-
-endmodule // fifo36_to_ll8