aboutsummaryrefslogtreecommitdiffstats
path: root/fpga/usrp3/lib/timing/timekeeper.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/usrp3/lib/timing/timekeeper.v
parent3b66804e41891e358c790b453a7a59ec7462dba4 (diff)
downloaduhd-fd3e84941de463fa1a7ebab0a69515b4bf2614cd.tar.gz
uhd-fd3e84941de463fa1a7ebab0a69515b4bf2614cd.tar.bz2
uhd-fd3e84941de463fa1a7ebab0a69515b4bf2614cd.zip
Removed copy of FPGA source files.
Diffstat (limited to 'fpga/usrp3/lib/timing/timekeeper.v')
-rw-r--r--fpga/usrp3/lib/timing/timekeeper.v74
1 files changed, 0 insertions, 74 deletions
diff --git a/fpga/usrp3/lib/timing/timekeeper.v b/fpga/usrp3/lib/timing/timekeeper.v
deleted file mode 100644
index 761bda5bc..000000000
--- a/fpga/usrp3/lib/timing/timekeeper.v
+++ /dev/null
@@ -1,74 +0,0 @@
-//
-// Copyright 2013-2014 Ettus Research LLC
-//
-
-
-module timekeeper
- #(parameter BASE = 0)
- (input clk, input reset, input pps,
- input set_stb, input [7:0] set_addr, input [31:0] set_data,
- output reg [63:0] vita_time, output reg [63:0] vita_time_lastpps);
-
- //////////////////////////////////////////////////////////////////////////
- // timer settings for this module
- //////////////////////////////////////////////////////////////////////////
- wire [63:0] time_at_next_event;
- wire set_time_pps, set_time_now;
- wire cmd_trigger;
-
- setting_reg #(.my_addr(BASE), .width()) sr_time_hi
- (.clk(clk), .rst(reset), .strobe(set_stb), .addr(set_addr), .in(set_data),
- .out(time_at_next_event[63:32]), .changed());
-
- setting_reg #(.my_addr(BASE+1), .width()) sr_time_lo
- (.clk(clk), .rst(reset), .strobe(set_stb), .addr(set_addr), .in(set_data),
- .out(time_at_next_event[31:0]), .changed());
-
- setting_reg #(.my_addr(BASE+2), .width(2)) sr_ctrl
- (.clk(clk), .rst(reset), .strobe(set_stb), .addr(set_addr), .in(set_data),
- .out({set_time_pps, set_time_now}), .changed(cmd_trigger));
-
- //////////////////////////////////////////////////////////////////////////
- // PPS edge detection logic
- //////////////////////////////////////////////////////////////////////////
- reg pps_del, pps_del2;
- always @(posedge clk)
- {pps_del2,pps_del} <= {pps_del, pps};
-
- wire pps_edge = !pps_del2 & pps_del;
-
- //////////////////////////////////////////////////////////////////////////
- // arm the trigger to latch a new time when the ctrl register is written
- //////////////////////////////////////////////////////////////////////////
- reg armed;
- wire time_event = armed && ((set_time_now) || (set_time_pps && pps_edge));
- always @(posedge clk) begin
- if (reset) armed <= 1'b0;
- else if (cmd_trigger) armed <= 1'b1;
- else if (time_event) armed <= 1'b0;
- end
-
- //////////////////////////////////////////////////////////////////////////
- // vita time tracker - update every tick or when we get an "event"
- //////////////////////////////////////////////////////////////////////////
- always @(posedge clk)
- if(reset)
- vita_time <= 64'h0;
- else if (time_event)
- vita_time <= time_at_next_event;
- else
- vita_time <= vita_time + 64'h1;
-
- //////////////////////////////////////////////////////////////////////////
- // track the time at last pps so host can detect the pps
- //////////////////////////////////////////////////////////////////////////
- always @(posedge clk)
- if(reset)
- vita_time_lastpps <= 64'h0;
- else if(pps_edge)
- if(time_event)
- vita_time_lastpps <= time_at_next_event;
- else
- vita_time_lastpps <= vita_time + 64'h1;
-
-endmodule // timekeeper