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authorMartin Braun <martin.braun@ettus.com>2014-10-07 11:25:20 +0200
committerMartin Braun <martin.braun@ettus.com>2014-10-07 11:25:20 +0200
commitfd3e84941de463fa1a7ebab0a69515b4bf2614cd (patch)
tree3fa721a13d41d2c0451d663a59a220a38fd5e614 /fpga/usrp2/gpif/packet_splitter.v
parent3b66804e41891e358c790b453a7a59ec7462dba4 (diff)
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Removed copy of FPGA source files.
Diffstat (limited to 'fpga/usrp2/gpif/packet_splitter.v')
-rw-r--r--fpga/usrp2/gpif/packet_splitter.v123
1 files changed, 0 insertions, 123 deletions
diff --git a/fpga/usrp2/gpif/packet_splitter.v b/fpga/usrp2/gpif/packet_splitter.v
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--- a/fpga/usrp2/gpif/packet_splitter.v
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@@ -1,123 +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/>.
-//
-
-
-// Split vita packets longer than one GPIF frame, add padding on short frames
-
-module packet_splitter
- #(parameter FRAME_LEN=256)
- (input clk, input reset, input clear,
- input [7:0] frames_per_packet,
- input [18:0] data_i,
- input src_rdy_i,
- output dst_rdy_o,
- output [18:0] data_o,
- output src_rdy_o,
- input dst_rdy_i,
- output [31:0] debug0,
- output [31:0] debug1);
-
- reg [1:0] state;
- reg [15:0] length;
- reg [15:0] frame_len;
- reg [7:0] frame_count;
-
- localparam PS_IDLE = 0;
- localparam PS_FRAME = 1;
- localparam PS_NEW_FRAME = 2;
- localparam PS_PAD = 3;
-
- wire eof_i = data_i[17];
-
- always @(posedge clk)
- if(reset | clear)
- begin
- state <= PS_IDLE;
- frame_count <= 0;
- end
- else
- case(state)
- PS_IDLE :
- if(src_rdy_i & dst_rdy_i)
- begin
- length <= { data_i[14:0],1'b0};
- frame_len <= FRAME_LEN;
- state <= PS_FRAME;
- frame_count <= 1;
- end
- PS_FRAME :
- if(src_rdy_i & dst_rdy_i)
- if((frame_len == 2) & ((length == 2) | eof_i))
- state <= PS_IDLE;
- else if(frame_len == 2)
- begin
- length <= length - 1;
- state <= PS_NEW_FRAME;
- frame_count <= frame_count + 1;
- end
- else if((length == 2)|eof_i)
- begin
- frame_len <= frame_len - 1;
- state <= PS_PAD;
- end
- else
- begin
- frame_len <= frame_len - 1;
- length <= length - 1;
- end
- PS_NEW_FRAME :
- if(src_rdy_i & dst_rdy_i)
- begin
- frame_len <= FRAME_LEN;
- if((length == 2)|eof_i)
- state <= PS_PAD;
- else
- begin
- state <= PS_FRAME;
- length <= length - 1;
- end // else: !if((length == 2)|eof_i)
- end // if (src_rdy_i & dst_rdy_i)
-
- PS_PAD :
- if(dst_rdy_i)
- if(frame_len == 2)
- state <= PS_IDLE;
- else
- frame_len <= frame_len - 1;
-
- endcase // case (state)
-
- wire next_state_is_idle = dst_rdy_i & (frame_len==2) &
- ( (state==PS_PAD) | ( (state==PS_FRAME) & src_rdy_i & ((length==2)|eof_i) ) );
-
-
-
-
- assign dst_rdy_o = dst_rdy_i & (state != PS_PAD);
- assign src_rdy_o = src_rdy_i | (state == PS_PAD);
-
- wire eof_out = (frame_len == 2) & (state != PS_IDLE) & (state != PS_NEW_FRAME);
- wire sof_out = (state == PS_IDLE) | (state == PS_NEW_FRAME);
- wire occ_out = eof_out & next_state_is_idle & (frames_per_packet != frame_count);
-
- wire [15:0] data_out = data_i[15:0];
- assign data_o = {occ_out, eof_out, sof_out, data_out};
-
- assign debug0 = { 8'd0, dst_rdy_o, src_rdy_o, next_state_is_idle, eof_out, sof_out, occ_out, state[1:0], frame_count[7:0], frames_per_packet[7:0] };
- assign debug1 = { length[15:0], frame_len[15:0] };
-
-endmodule // packet_splitter