aboutsummaryrefslogtreecommitdiffstats
path: root/usrp2/gpif/gpif_wr.v
diff options
context:
space:
mode:
Diffstat (limited to 'usrp2/gpif/gpif_wr.v')
-rw-r--r--usrp2/gpif/gpif_wr.v95
1 files changed, 0 insertions, 95 deletions
diff --git a/usrp2/gpif/gpif_wr.v b/usrp2/gpif/gpif_wr.v
deleted file mode 100644
index 89fae282e..000000000
--- a/usrp2/gpif/gpif_wr.v
+++ /dev/null
@@ -1,95 +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 gpif_wr
- (input gpif_clk, input gpif_rst,
- input [15:0] gpif_data, input gpif_wr, input gpif_ep,
- output reg gpif_full_d, output reg gpif_full_c,
-
- input sys_clk, input sys_rst,
- output [18:0] data_o, output src_rdy_o, input dst_rdy_i,
- output [18:0] ctrl_o, output ctrl_src_rdy_o, input ctrl_dst_rdy_i,
- output [31:0] debug );
-
- reg wr_reg, ep_reg;
- reg [15:0] gpif_data_reg;
-
- always @(posedge gpif_clk)
- begin
- ep_reg <= gpif_ep;
- wr_reg <= gpif_wr;
- gpif_data_reg <= gpif_data;
- end
-
- reg [9:0] write_count;
-
- always @(posedge gpif_clk)
- if(gpif_rst)
- write_count <= 0;
- else if(wr_reg)
- write_count <= write_count + 1;
- else
- write_count <= 0;
-
- reg sop;
- wire eop = (write_count == 255);
- wire eop_ctrl = (write_count == 15);
-
- always @(posedge gpif_clk)
- sop <= gpif_wr & ~wr_reg;
-
- // Data Path
- wire [15:0] fifo_space;
- always @(posedge gpif_clk)
- if(gpif_rst)
- gpif_full_d <= 1;
- else
- gpif_full_d <= fifo_space < 256;
-
- wire [17:0] data_int;
- wire src_rdy_int, dst_rdy_int;
-
- fifo_cascade #(.WIDTH(18), .SIZE(10)) wr_fifo
- (.clk(gpif_clk), .reset(gpif_rst), .clear(0),
- .datain({eop,sop,gpif_data_reg}), .src_rdy_i(~ep_reg & wr_reg & ~write_count[8]), .dst_rdy_o(), .space(fifo_space),
- .dataout(data_int), .src_rdy_o(src_rdy_int), .dst_rdy_i(dst_rdy_int), .occupied());
-
- fifo_2clock_cascade #(.WIDTH(18), .SIZE(4)) wr_fifo_2clk
- (.wclk(gpif_clk), .datain(data_int), .src_rdy_i(src_rdy_int), .dst_rdy_o(dst_rdy_int), .space(),
- .rclk(sys_clk), .dataout(data_o[17:0]), .src_rdy_o(src_rdy_o), .dst_rdy_i(dst_rdy_i), .occupied(),
- .arst(sys_rst));
- assign data_o[18] = 1'b0;
-
- // Control Path
- wire [15:0] ctrl_fifo_space;
- always @(posedge gpif_clk)
- if(gpif_rst)
- gpif_full_c <= 1;
- else
- gpif_full_c <= ctrl_fifo_space < 16;
-
- fifo_2clock_cascade #(.WIDTH(19), .SIZE(4)) ctrl_fifo_2clk
- (.wclk(gpif_clk), .datain({1'b0,eop_ctrl,sop,gpif_data_reg}),
- .src_rdy_i(ep_reg & wr_reg & ~write_count[4]), .dst_rdy_o(), .space(ctrl_fifo_space),
- .rclk(sys_clk), .dataout(ctrl_o[18:0]),
- .src_rdy_o(ctrl_src_rdy_o), .dst_rdy_i(ctrl_dst_rdy_i), .occupied(),
- .arst(sys_rst));
-
- assign debug = { 16'd0, ep_reg, wr_reg, eop, sop, (~ep_reg & wr_reg & ~write_count[8]), src_rdy_int, dst_rdy_int, write_count[8:0]};
-
-endmodule // gpif_wr