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author | Martin Braun <martin.braun@ettus.com> | 2014-10-07 11:25:20 +0200 |
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committer | Martin Braun <martin.braun@ettus.com> | 2014-10-07 11:25:20 +0200 |
commit | fd3e84941de463fa1a7ebab0a69515b4bf2614cd (patch) | |
tree | 3fa721a13d41d2c0451d663a59a220a38fd5e614 /fpga/usrp3/lib/timing/timekeeper.v | |
parent | 3b66804e41891e358c790b453a7a59ec7462dba4 (diff) | |
download | uhd-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.v | 74 |
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 |