aboutsummaryrefslogtreecommitdiffstats
path: root/fpga/usrp2/timing/time_64bit.v
diff options
context:
space:
mode:
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/timing/time_64bit.v
parent3b66804e41891e358c790b453a7a59ec7462dba4 (diff)
downloaduhd-fd3e84941de463fa1a7ebab0a69515b4bf2614cd.tar.gz
uhd-fd3e84941de463fa1a7ebab0a69515b4bf2614cd.tar.bz2
uhd-fd3e84941de463fa1a7ebab0a69515b4bf2614cd.zip
Removed copy of FPGA source files.
Diffstat (limited to 'fpga/usrp2/timing/time_64bit.v')
-rw-r--r--fpga/usrp2/timing/time_64bit.v162
1 files changed, 0 insertions, 162 deletions
diff --git a/fpga/usrp2/timing/time_64bit.v b/fpga/usrp2/timing/time_64bit.v
deleted file mode 100644
index 6f335890e..000000000
--- a/fpga/usrp2/timing/time_64bit.v
+++ /dev/null
@@ -1,162 +0,0 @@
-//
-// Copyright 2011-2012 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 time_64bit
- #(
- parameter BASE = 0)
- (input clk, input rst,
- input set_stb, input [7:0] set_addr, input [31:0] set_data,
- input pps,
- output reg [63:0] vita_time,
- output reg [63:0] vita_time_pps,
- output pps_int,
- input exp_time_in, output exp_time_out,
- output reg good_sync,
- output [31:0] debug
- );
-
- localparam NEXT_TICKS_HI = 0;
- localparam NEXT_TICKS_LO = 1;
- localparam PPS_POLSRC = 2;
- localparam PPS_IMM = 3;
- localparam MIMO_SYNC = 5;
-
- reg [63:0] ticks;
-
- always @(posedge clk)
- vita_time <= ticks;
-
- wire [63:0] vita_time_rcvd;
-
- wire [63:0] next_ticks_preset;
- wire set_on_pps_trig;
- reg set_on_next_pps;
- wire pps_polarity, pps_source, set_imm;
- reg [1:0] pps_del;
- reg pps_reg_p, pps_reg_n, pps_reg;
- wire pps_edge;
-
- reg [15:0] sync_counter;
- wire sync_rcvd;
- wire [63:0] mimo_ticks;
- wire mimo_sync_now;
- wire mimo_sync;
- wire [7:0] sync_delay;
-
- setting_reg #(.my_addr(BASE+NEXT_TICKS_LO)) sr_next_ticks_lo
- (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
- .in(set_data),.out(next_ticks_preset[31:0]),.changed());
-
- setting_reg #(.my_addr(BASE+NEXT_TICKS_HI)) sr_next_ticks_hi
- (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
- .in(set_data),.out(next_ticks_preset[63:32]),.changed(set_on_pps_trig));
-
- setting_reg #(.my_addr(BASE+PPS_POLSRC), .width(2)) sr_pps_polsrc
- (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
- .in(set_data),.out({pps_source,pps_polarity}),.changed());
-
- setting_reg #(.my_addr(BASE+PPS_IMM), .width(1)) sr_pps_imm
- (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
- .in(set_data),.out(set_imm),.changed());
-
- setting_reg #(.my_addr(BASE+MIMO_SYNC), .at_reset(0), .width(9)) sr_mimosync
- (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
- .in(set_data),.out({mimo_sync,sync_delay}),.changed());
-
- always @(posedge clk) pps_reg_p <= pps;
- always @(negedge clk) pps_reg_n <= pps;
- always @* pps_reg <= pps_polarity ? pps_reg_p : pps_reg_n;
-
- always @(posedge clk)
- if(rst)
- pps_del <= 2'b00;
- else
- pps_del <= {pps_del[0],pps_reg};
-
- assign pps_edge = pps_del[0] & ~pps_del[1];
-
- always @(posedge clk)
- if(pps_edge)
- vita_time_pps <= vita_time;
-
- always @(posedge clk)
- if(rst)
- set_on_next_pps <= 0;
- else if(set_on_pps_trig)
- set_on_next_pps <= 1;
- else if(set_imm | pps_edge)
- set_on_next_pps <= 0;
-
- wire [63:0] ticks_plus_one = ticks + 1;
-
- always @(posedge clk)
- if(rst)
- begin
- ticks <= 64'd0;
- end
- else if((set_imm | pps_edge) & set_on_next_pps)
- begin
- ticks <= next_ticks_preset;
- end
- else if(mimo_sync_now)
- begin
- ticks <= mimo_ticks;
- end
- else
- ticks <= ticks_plus_one;
-
- assign pps_int = pps_edge;
-
- // MIMO Connector Time Sync
- wire send_sync = (sync_counter == 59999); // X % 10 = 9
-
- always @(posedge clk)
- if(rst)
- sync_counter <= 0;
- else
- if(send_sync)
- sync_counter <= 0;
- else
- sync_counter <= sync_counter + 1;
-
- time_sender time_sender
- (.clk(clk),.rst(rst),
- .vita_time(vita_time),
- .send_sync(send_sync),
- .exp_time_out(exp_time_out) );
-
- time_receiver time_receiver
- (.clk(clk),.rst(rst),
- .vita_time(vita_time_rcvd),
- .sync_rcvd(sync_rcvd),
- .exp_time_in(exp_time_in) );
-
- assign mimo_ticks = vita_time_rcvd[63:0] + {48'd0,sync_delay};
- assign mimo_sync_now = mimo_sync & sync_rcvd;
-
- assign debug = { { 24'b0} ,
- { 2'b0, exp_time_in, exp_time_out, mimo_sync, mimo_sync_now, sync_rcvd, send_sync} };
-
- always @(posedge clk)
- if(rst)
- good_sync <= 0;
- else if(sync_rcvd)
- good_sync <= 1;
-
-endmodule // time_64bit