diff options
Diffstat (limited to 'fpga/usrp2/fifo/fifo36_to_ll8.v')
-rw-r--r-- | fpga/usrp2/fifo/fifo36_to_ll8.v | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/fpga/usrp2/fifo/fifo36_to_ll8.v b/fpga/usrp2/fifo/fifo36_to_ll8.v deleted file mode 100644 index 5c2da812f..000000000 --- a/fpga/usrp2/fifo/fifo36_to_ll8.v +++ /dev/null @@ -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 |