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-rw-r--r--usrp2/timing/time_64bit.v70
-rw-r--r--usrp2/timing/time_receiver.v102
-rw-r--r--usrp2/timing/time_sender.v68
-rw-r--r--usrp2/timing/time_transfer_tb.v26
-rw-r--r--usrp2/top/u2_rev3/Makefile4
-rw-r--r--usrp2/top/u2_rev3/u2_core.v13
-rw-r--r--usrp2/top/u2_rev3/u2_rev3.ucf8
-rw-r--r--usrp2/top/u2_rev3/u2_rev3.v24
-rwxr-xr-xusrp2/top/u2plus/u2plus.ucf2
-rw-r--r--usrp2/top/u2plus/u2plus.v6
-rw-r--r--usrp2/top/u2plus/u2plus_core.v7
-rw-r--r--usrp2/vrt/vita_tx_control.v18
12 files changed, 241 insertions, 107 deletions
diff --git a/usrp2/timing/time_64bit.v b/usrp2/timing/time_64bit.v
index 51c006962..33eb2b25a 100644
--- a/usrp2/timing/time_64bit.v
+++ b/usrp2/timing/time_64bit.v
@@ -3,27 +3,41 @@
module time_64bit
#(parameter TICKS_PER_SEC = 32'd100000000,
parameter BASE = 0)
- (input clk, input rst,
- input set_stb, input [7:0] set_addr, input [31:0] set_data,
- input pps,
- output [63:0] vita_time, output pps_int
- );
-
+ (input clk, input rst,
+ input set_stb, input [7:0] set_addr, input [31:0] set_data,
+ input pps,
+ output [63:0] vita_time, output pps_int,
+ input exp_time_in, output exp_time_out,
+ output [31:0] debug
+ );
+
localparam NEXT_SECS = 0;
localparam NEXT_TICKS = 1;
localparam PPS_POLSRC = 2;
localparam PPS_IMM = 3;
localparam TPS = 4;
+ localparam MIMO_SYNC = 5;
reg [31:0] seconds, ticks;
wire end_of_second;
assign vita_time = {seconds,ticks};
+ wire [63:0] vita_time_rcvd;
wire [31:0] next_ticks_preset, next_seconds_preset;
wire [31:0] ticks_per_sec_reg;
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 [31:0] mimo_secs, mimo_ticks;
+ wire mimo_sync_now;
+ wire mimo_sync;
+ wire [7:0] sync_delay;
setting_reg #(.my_addr(BASE+NEXT_TICKS)) sr_next_ticks
(.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
@@ -45,10 +59,10 @@ module time_64bit
(.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
.in(set_data),.out(ticks_per_sec_reg),.changed());
- reg [1:0] pps_del;
- reg pps_reg_p, pps_reg_n, pps_reg;
- wire pps_edge;
-
+ 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;
@@ -82,6 +96,11 @@ module time_64bit
seconds <= next_seconds_preset;
ticks <= next_ticks_preset;
end
+ else if(mimo_sync_now)
+ begin
+ seconds <= mimo_secs;
+ ticks <= mimo_ticks;
+ end
else if(ticks_plus_one == ticks_per_sec_reg)
begin
seconds <= seconds + 1;
@@ -91,5 +110,36 @@ module time_64bit
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_secs = vita_time_rcvd[63:32];
+ assign mimo_ticks = vita_time_rcvd[31:0] + {16'd0,sync_delay};
+ assign mimo_sync_now = mimo_sync & sync_rcvd & (mimo_ticks <= TICKS_PER_SEC);
+
+ assign debug = { { 24'b0} ,
+ { 2'b0, exp_time_in, exp_time_out, mimo_sync, mimo_sync_now, sync_rcvd, send_sync} };
endmodule // time_64bit
diff --git a/usrp2/timing/time_receiver.v b/usrp2/timing/time_receiver.v
index 8e7d3f1ea..fd8651d29 100644
--- a/usrp2/timing/time_receiver.v
+++ b/usrp2/timing/time_receiver.v
@@ -1,9 +1,9 @@
module time_receiver
(input clk, input rst,
- output [31:0] master_time,
- output sync_rcvd,
- input exp_pps_in);
+ output reg [63:0] vita_time,
+ output reg sync_rcvd,
+ input exp_time_in);
wire code_err, disp_err, dispout, complete_word;
reg disp_reg;
@@ -13,7 +13,7 @@ module time_receiver
reg [8:0] dataout_reg;
always @(posedge clk)
- shiftreg <= {exp_pps_in, shiftreg[9:1]};
+ shiftreg <= {exp_time_in, shiftreg[9:1]};
localparam COMMA_0 = 10'h283;
localparam COMMA_1 = 10'h17c;
@@ -55,40 +55,76 @@ module time_receiver
localparam STATE_T1 = 2;
localparam STATE_T2 = 3;
localparam STATE_T3 = 4;
+ localparam STATE_T4 = 5;
+ localparam STATE_T5 = 6;
+ localparam STATE_T6 = 7;
+ localparam STATE_T7 = 8;
+ localparam STATE_TAIL = 9;
localparam HEAD = 9'h13c;
-
- reg [7:0] clock_a, clock_b, clock_c;
- reg [2:0] state;
+ localparam TAIL = 9'h1F7;
+
+ reg [3:0] state;
always @(posedge clk)
if(rst)
state <= STATE_IDLE;
else if(complete_word)
- case(state)
- STATE_IDLE :
- if(dataout_reg == HEAD)
- state <= STATE_T0;
- STATE_T0 :
- begin
- clock_a <= dataout_reg[7:0];
- state <= STATE_T1;
- end
- STATE_T1 :
- begin
- clock_b <= dataout_reg[7:0];
- state <= STATE_T2;
- end
- STATE_T2 :
- begin
- clock_c <= dataout_reg[7:0];
- state <= STATE_T3;
- end
- STATE_T3 :
- state <= STATE_IDLE;
- endcase // case(state)
-
- assign master_time = {clock_a, clock_b, clock_c, dataout_reg[7:0]};
- assign sync_rcvd = (complete_word & (state == STATE_T3));
-
+ if(code_err | disp_err)
+ state <= STATE_IDLE;
+ else
+ case(state)
+ STATE_IDLE :
+ if(dataout_reg == HEAD)
+ state <= STATE_T0;
+ STATE_T0 :
+ begin
+ vita_time[63:56] <= dataout_reg[7:0];
+ state <= STATE_T1;
+ end
+ STATE_T1 :
+ begin
+ vita_time[55:48] <= dataout_reg[7:0];
+ state <= STATE_T2;
+ end
+ STATE_T2 :
+ begin
+ vita_time[47:40] <= dataout_reg[7:0];
+ state <= STATE_T3;
+ end
+ STATE_T3 :
+ begin
+ vita_time[39:32] <= dataout_reg[7:0];
+ state <= STATE_T4;
+ end
+ STATE_T4 :
+ begin
+ vita_time[31:24] <= dataout_reg[7:0];
+ state <= STATE_T5;
+ end
+ STATE_T5 :
+ begin
+ vita_time[23:16] <= dataout_reg[7:0];
+ state <= STATE_T6;
+ end
+ STATE_T6 :
+ begin
+ vita_time[15:8] <= dataout_reg[7:0];
+ state <= STATE_T7;
+ end
+ STATE_T7 :
+ begin
+ vita_time[7:0] <= dataout_reg[7:0];
+ state <= STATE_TAIL;
+ end
+ STATE_TAIL :
+ state <= STATE_IDLE;
+ endcase // case(state)
+
+ always @(posedge clk)
+ if(rst)
+ sync_rcvd <= 0;
+ else
+ sync_rcvd <= (complete_word & (state == STATE_TAIL) & (dataout_reg[8:0] == TAIL));
+
endmodule // time_sender
diff --git a/usrp2/timing/time_sender.v b/usrp2/timing/time_sender.v
index aa2fcbbdb..f4ee5226a 100644
--- a/usrp2/timing/time_sender.v
+++ b/usrp2/timing/time_sender.v
@@ -2,23 +2,23 @@
module time_sender
(input clk, input rst,
- input [31:0] master_time,
+ input [63:0] vita_time,
input send_sync,
- output exp_pps_out);
+ output reg exp_time_out);
reg [7:0] datain;
reg k;
wire [9:0] dataout;
- reg [9:0] dataout_reg;
- reg disp_reg;
- wire disp, new_word;
+ reg [9:0] dataout_reg;
+ reg disp_reg;
+ wire disp, new_word;
+ reg [4:0] state;
+ reg [3:0] bit_count;
encode_8b10b encode_8b10b
(.datain({k,datain}),.dispin(disp_reg),
.dataout(dataout),.dispout(disp));
- assign exp_pps_out = dataout_reg[0];
-
always @(posedge clk)
if(rst)
disp_reg <= 0;
@@ -33,9 +33,9 @@ module time_sender
else
dataout_reg <= {1'b0,dataout_reg[9:1]};
- reg [4:0] state;
- reg [3:0] bit_count;
-
+ always @(posedge clk)
+ exp_time_out <= dataout_reg[0];
+
assign new_word = (bit_count == 9);
always @(posedge clk)
@@ -52,17 +52,23 @@ module time_sender
localparam SEND_T1 = 3;
localparam SEND_T2 = 4;
localparam SEND_T3 = 5;
+ localparam SEND_T4 = 6;
+ localparam SEND_T5 = 7;
+ localparam SEND_T6 = 8;
+ localparam SEND_T7 = 9;
+ localparam SEND_TAIL = 10;
localparam COMMA = 8'hBC;
localparam HEAD = 8'h3C;
-
- reg [31:0] master_time_reg;
+ localparam TAIL = 8'hF7;
+
+ reg [63:0] vita_time_reg;
always @(posedge clk)
if(rst)
- master_time_reg <= 0;
+ vita_time_reg <= 0;
else if(send_sync)
- master_time_reg <= master_time;
+ vita_time_reg <= vita_time;
always @(posedge clk)
if(rst)
@@ -84,27 +90,51 @@ module time_sender
end
SEND_T0 :
begin
- {k,datain} <= {1'b0, master_time_reg[31:24] };
+ {k,datain} <= {1'b0, vita_time_reg[63:56] };
state <= SEND_T1;
end
SEND_T1 :
begin
- {k,datain} <= {1'b0, master_time_reg[23:16]};
+ {k,datain} <= {1'b0, vita_time_reg[55:48]};
state <= SEND_T2;
end
SEND_T2 :
begin
- {k,datain} <= {1'b0, master_time_reg[15:8]};
+ {k,datain} <= {1'b0, vita_time_reg[47:40]};
state <= SEND_T3;
end
SEND_T3 :
begin
- {k,datain} <= {1'b0, master_time_reg[7:0]};
+ {k,datain} <= {1'b0, vita_time_reg[39:32]};
+ state <= SEND_T4;
+ end
+ SEND_T4 :
+ begin
+ {k,datain} <= {1'b0, vita_time_reg[31:24]};
+ state <= SEND_T5;
+ end
+ SEND_T5 :
+ begin
+ {k,datain} <= {1'b0, vita_time_reg[23:16]};
+ state <= SEND_T6;
+ end
+ SEND_T6 :
+ begin
+ {k,datain} <= {1'b0, vita_time_reg[15:8]};
+ state <= SEND_T7;
+ end
+ SEND_T7 :
+ begin
+ {k,datain} <= {1'b0, vita_time_reg[7:0]};
+ state <= SEND_TAIL;
+ end
+ SEND_TAIL :
+ begin
+ {k,datain} <= {1'b1, TAIL};
state <= SEND_IDLE;
end
default :
state <= SEND_IDLE;
endcase // case(state)
-
endmodule // time_sender
diff --git a/usrp2/timing/time_transfer_tb.v b/usrp2/timing/time_transfer_tb.v
index 2b75c60bd..0c164f82c 100644
--- a/usrp2/timing/time_transfer_tb.v
+++ b/usrp2/timing/time_transfer_tb.v
@@ -18,12 +18,12 @@ module time_transfer_tb();
initial #100000000 $finish;
- wire exp_pps, pps, pps_rcv;
- wire [31:0] master_clock_rcv;
- reg [31:0] master_clock = 0;
- reg [31:0] counter = 0;
+ wire exp_time, pps, pps_rcv;
+ wire [63:0] vita_time_rcv;
+ reg [63:0] vita_time = 0;
+ reg [63:0] counter = 0;
- localparam PPS_PERIOD = 109;
+ localparam PPS_PERIOD = 439; // PPS_PERIOD % 10 must = 9
always @(posedge clk)
if(counter == PPS_PERIOD)
counter <= 0;
@@ -32,19 +32,19 @@ module time_transfer_tb();
assign pps = (counter == (PPS_PERIOD-1));
always @(posedge clk)
- master_clock <= master_clock + 1;
+ vita_time <= vita_time + 1;
time_sender time_sender
(.clk(clk),.rst(rst),
- .master_clock(master_clock),
- .pps(pps),
- .exp_pps_out(exp_pps) );
+ .vita_time(vita_time),
+ .send_sync(pps),
+ .exp_time_out(exp_time) );
time_receiver time_receiver
(.clk(clk),.rst(rst),
- .master_clock(master_clock_rcv),
- .pps(pps_rcv),
- .exp_pps_in(exp_pps) );
+ .vita_time(vita_time_rcv),
+ .sync_rcvd(pps_rcv),
+ .exp_time_in(exp_time) );
- wire [31:0] delta = master_clock - master_clock_rcv;
+ wire [31:0] delta = vita_time - vita_time_rcv;
endmodule // time_transfer_tb
diff --git a/usrp2/top/u2_rev3/Makefile b/usrp2/top/u2_rev3/Makefile
index 99effb038..05ada2476 100644
--- a/usrp2/top/u2_rev3/Makefile
+++ b/usrp2/top/u2_rev3/Makefile
@@ -6,7 +6,7 @@
# Project Setup
##################################################
TOP_MODULE = u2_rev3
-BUILD_DIR = $(abspath build-udp$(ISE))
+BUILD_DIR = $(abspath build)
##################################################
# Include other makefiles
@@ -46,7 +46,7 @@ simulator "ISE Simulator (VHDL/Verilog)" \
# Sources
##################################################
TOP_SRCS = \
-u2_core_udp.v \
+u2_core.v \
u2_rev3.v \
u2_rev3.ucf
diff --git a/usrp2/top/u2_rev3/u2_core.v b/usrp2/top/u2_rev3/u2_core.v
index c85e81140..363ac3635 100644
--- a/usrp2/top/u2_rev3/u2_core.v
+++ b/usrp2/top/u2_rev3/u2_core.v
@@ -17,8 +17,8 @@ module u2_core
output [1:0] debug_clk,
// Expansion
- input exp_pps_in,
- output exp_pps_out,
+ input exp_time_in,
+ output exp_time_out,
// GMII
// GMII-CTRL
@@ -431,7 +431,6 @@ module u2_core
wb_readback_mux buff_pool_status
(.wb_clk_i(wb_clk), .wb_rst_i(wb_rst), .wb_stb_i(s5_stb),
.wb_adr_i(s5_adr), .wb_dat_o(s5_dat_i), .wb_ack_o(s5_ack),
-
.word00(32'b0),.word01(32'b0),.word02(32'b0),.word03(32'b0),
.word04(32'b0),.word05(32'b0),.word06(32'b0),.word07(32'b0),
.word08(status),.word09({sim_mode,27'b0,clock_divider[3:0]}),.word10(vita_time[63:32]),
@@ -721,10 +720,14 @@ module u2_core
// /////////////////////////////////////////////////////////////////////////
// VITA Timing
+ wire [31:0] debug_sync;
+
time_64bit #(.TICKS_PER_SEC(32'd100000000),.BASE(SR_TIME64)) time_64bit
(.clk(dsp_clk), .rst(dsp_rst), .set_stb(set_stb_dsp), .set_addr(set_addr_dsp), .set_data(set_data_dsp),
- .pps(pps_in), .vita_time(vita_time), .pps_int(pps_int));
-
+ .pps(pps_in), .vita_time(vita_time), .pps_int(pps_int),
+ .exp_time_in(exp_time_in), .exp_time_out(exp_time_out),
+ .debug(debug_sync));
+
// /////////////////////////////////////////////////////////////////////////////////////////
// Debug Pins
diff --git a/usrp2/top/u2_rev3/u2_rev3.ucf b/usrp2/top/u2_rev3/u2_rev3.ucf
index 6e0caedd5..8017f61ff 100644
--- a/usrp2/top/u2_rev3/u2_rev3.ucf
+++ b/usrp2/top/u2_rev3/u2_rev3.ucf
@@ -40,10 +40,10 @@ NET "debug_clk[0]" LOC = "N4" ;
NET "debug_clk[1]" LOC = "M1" ;
NET "uart_tx_o" LOC = "C7" ;
NET "uart_rx_i" LOC = "A3" ;
-NET "exp_pps_in_p" LOC = "V3" ;
-NET "exp_pps_in_n" LOC = "V4" ;
-NET "exp_pps_out_p" LOC = "V1" ;
-NET "exp_pps_out_n" LOC = "V2" ;
+NET "exp_time_in_p" LOC = "V3" ;
+NET "exp_time_in_n" LOC = "V4" ;
+NET "exp_time_out_p" LOC = "V1" ;
+NET "exp_time_out_n" LOC = "V2" ;
NET "GMII_COL" LOC = "U16" ;
NET "GMII_CRS" LOC = "U17" ;
NET "GMII_TXD[0]" LOC = "W14" |IOSTANDARD = LVCMOS25 |DRIVE = 12 |SLEW = FAST ;
diff --git a/usrp2/top/u2_rev3/u2_rev3.v b/usrp2/top/u2_rev3/u2_rev3.v
index 4f7f9bf1a..f2bba6c50 100644
--- a/usrp2/top/u2_rev3/u2_rev3.v
+++ b/usrp2/top/u2_rev3/u2_rev3.v
@@ -11,10 +11,10 @@ module u2_rev3
input uart_rx_i,
// Expansion
- input exp_pps_in_p, // Diff
- input exp_pps_in_n, // Diff
- output exp_pps_out_p, // Diff
- output exp_pps_out_n, // Diff
+ input exp_time_in_p, // Diff
+ input exp_time_in_n, // Diff
+ output exp_time_out_p, // Diff
+ output exp_time_out_n, // Diff
// GMII
// GMII-CTRL
@@ -181,13 +181,13 @@ module u2_rev3
wire cpld_clock_buf;
BUFG cpld_clock_BUF (.O(cpld_clock_buf),.I(cpld_clock));
- wire exp_pps_in;
- IBUFDS exp_pps_in_pin (.O(exp_pps_in),.I(exp_pps_in_p),.IB(exp_pps_in_n));
- defparam exp_pps_in_pin.IOSTANDARD = "LVDS_25";
+ wire exp_time_in;
+ IBUFDS exp_time_in_pin (.O(exp_time_in),.I(exp_time_in_p),.IB(exp_time_in_n));
+ defparam exp_time_in_pin.IOSTANDARD = "LVDS_25";
- wire exp_pps_out;
- OBUFDS exp_pps_out_pin (.O(exp_pps_out_p),.OB(exp_pps_out_n),.I(exp_pps_out));
- defparam exp_pps_out_pin.IOSTANDARD = "LVDS_25";
+ wire exp_time_out;
+ OBUFDS exp_time_out_pin (.O(exp_time_out_p),.OB(exp_time_out_n),.I(exp_time_out));
+ defparam exp_time_out_pin.IOSTANDARD = "LVDS_25";
reg [5:0] clock_ready_d;
always @(posedge clk_fpga)
@@ -480,8 +480,8 @@ module u2_rev3
.leds (leds_int),
.debug (debug[31:0]),
.debug_clk (debug_clk[1:0]),
- .exp_pps_in (exp_pps_in),
- .exp_pps_out (exp_pps_out),
+ .exp_time_in (exp_time_in),
+ .exp_time_out (exp_time_out),
.GMII_COL (GMII_COL),
.GMII_CRS (GMII_CRS),
.GMII_TXD (GMII_TXD_unreg[7:0]),
diff --git a/usrp2/top/u2plus/u2plus.ucf b/usrp2/top/u2plus/u2plus.ucf
index 25267a67e..5fbe55c26 100755
--- a/usrp2/top/u2plus/u2plus.ucf
+++ b/usrp2/top/u2plus/u2plus.ucf
@@ -158,7 +158,7 @@ NET "RXD<2>" LOC = "AF15" ;
NET "RXD<1>" LOC = "AD12" ;
## AD9510
-NET "CLK_STATUS" LOC = "AD22" ;
+NET "clk_status" LOC = "AD22" ;
NET "CLK_FUNC" LOC = "AC21" ;
NET "clk_sel<0>" LOC = "AE21" ;
NET "clk_sel<1>" LOC = "AD21" ;
diff --git a/usrp2/top/u2plus/u2plus.v b/usrp2/top/u2plus/u2plus.v
index 270655a8d..c0140e989 100644
--- a/usrp2/top/u2plus/u2plus.v
+++ b/usrp2/top/u2plus/u2plus.v
@@ -44,7 +44,7 @@ module u2plus
output [1:0] clk_en,
output [1:0] clk_sel,
input CLK_FUNC, // FIXME is an input to control the 9510
- input CLK_STATUS,
+ input clk_status,
inout SCL, inout SDA, // I2C
@@ -357,8 +357,8 @@ module u2plus
.leds (leds_int),
.debug (debug[31:0]),
.debug_clk (debug_clk[1:0]),
- .exp_pps_in (exp_time_in),
- .exp_pps_out (exp_time_out),
+ .exp_time_in (exp_time_in),
+ .exp_time_out (exp_time_out),
.GMII_COL (GMII_COL),
.GMII_CRS (GMII_CRS),
.GMII_TXD (GMII_TXD_unreg[7:0]),
diff --git a/usrp2/top/u2plus/u2plus_core.v b/usrp2/top/u2plus/u2plus_core.v
index 8426826e2..4e0b190ef 100644
--- a/usrp2/top/u2plus/u2plus_core.v
+++ b/usrp2/top/u2plus/u2plus_core.v
@@ -16,8 +16,8 @@ module u2plus_core
output [1:0] debug_clk,
// Expansion
- input exp_pps_in,
- output exp_pps_out,
+ input exp_time_in,
+ output exp_time_out,
// GMII
// GMII-CTRL
@@ -683,7 +683,8 @@ module u2plus_core
time_64bit #(.TICKS_PER_SEC(32'd100000000),.BASE(SR_TIME64)) time_64bit
(.clk(dsp_clk), .rst(dsp_rst), .set_stb(set_stb_dsp), .set_addr(set_addr_dsp), .set_data(set_data_dsp),
- .pps(pps_in), .vita_time(vita_time), .pps_int(pps_int));
+ .pps(pps_in), .vita_time(vita_time), .pps_int(pps_int),
+ .exp_time_in(exp_time_in), .exp_time_out(exp_time_out));
// /////////////////////////////////////////////////////////////////////////////////////////
// Debug Pins
diff --git a/usrp2/vrt/vita_tx_control.v b/usrp2/vrt/vita_tx_control.v
index 20ad6b995..ab6da8bd0 100644
--- a/usrp2/vrt/vita_tx_control.v
+++ b/usrp2/vrt/vita_tx_control.v
@@ -40,7 +40,21 @@ module vita_tx_control
time_compare
time_compare (.time_now(vita_time), .trigger_time(send_time),
.now(now), .early(early), .late(late), .too_early());
+
+ reg late_qual, late_del;
+
+ always @(posedge clk)
+ if(reset | clear)
+ late_del <= 0;
+ else
+ late_del <= late;
+ always @(posedge clk)
+ if(reset | clear)
+ late_qual <= 0;
+ else
+ late_qual <= (sample_fifo_src_rdy_i & ~sample_fifo_dst_rdy_o);
+
localparam IBS_IDLE = 0;
localparam IBS_RUN = 1; // FIXME do we need this?
localparam IBS_CONT_BURST = 2;
@@ -87,7 +101,7 @@ module vita_tx_control
end
else if(~send_at | now)
ibs_state <= IBS_RUN;
- else if(late | too_early)
+ else if((late_qual & late_del) | too_early)
begin
ibs_state <= IBS_ERROR;
error_code <= CODE_TIME_ERROR;
@@ -166,7 +180,7 @@ module vita_tx_control
else
packet_consumed <= eop & sample_fifo_src_rdy_i & sample_fifo_dst_rdy_o;
- assign debug = { { now,early,late,ack,eop,eob,sob,send_at },
+ assign debug = { { now,late_qual,late_del,ack,eop,eob,sob,send_at },
{ sample_fifo_src_rdy_i, sample_fifo_dst_rdy_o, strobe, run, error, ibs_state[2:0] },
{ 8'b0 },
{ 8'b0 } };
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 22:50:06 +0000