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Diffstat (limited to 'fpga/usrp2/gpif/packet_splitter.v')
| -rw-r--r-- | fpga/usrp2/gpif/packet_splitter.v | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/fpga/usrp2/gpif/packet_splitter.v b/fpga/usrp2/gpif/packet_splitter.v deleted file mode 100644 index ba4c8cded..000000000 --- a/fpga/usrp2/gpif/packet_splitter.v +++ /dev/null @@ -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 |