diff options
Diffstat (limited to 'fpga/usrp3/lib/timing/timekeeper.v')
| -rw-r--r-- | fpga/usrp3/lib/timing/timekeeper.v | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/fpga/usrp3/lib/timing/timekeeper.v b/fpga/usrp3/lib/timing/timekeeper.v index 627472094..761bda5bc 100644 --- a/fpga/usrp3/lib/timing/timekeeper.v +++ b/fpga/usrp3/lib/timing/timekeeper.v @@ -1,5 +1,5 @@ // -// Copyright 2013 Ettus Research LLC +// Copyright 2013-2014 Ettus Research LLC // @@ -19,11 +19,11 @@ module timekeeper 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)); @@ -38,12 +38,6 @@ module timekeeper wire pps_edge = !pps_del2 & pps_del; ////////////////////////////////////////////////////////////////////////// - // track the time at last pps so host can detect the pps - ////////////////////////////////////////////////////////////////////////// - always @(posedge clk) - if(pps_edge) vita_time_lastpps <= vita_time; - - ////////////////////////////////////////////////////////////////////////// // arm the trigger to latch a new time when the ctrl register is written ////////////////////////////////////////////////////////////////////////// reg armed; @@ -65,4 +59,16 @@ module timekeeper 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 |