From ac41c5a7adaf7f004c535b3a8b13aa5343562f50 Mon Sep 17 00:00:00 2001
From: Matt Ettus <matt@ettus.com>
Date: Mon, 6 Dec 2010 11:23:55 -0800
Subject: should safely delay the late signal which was causing timing problems

---
 usrp2/vrt/vita_tx_control.v | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

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 } };
-- 
cgit v1.2.3


From 355382f4c687f5d997f4589a34915d6e465bd387 Mon Sep 17 00:00:00 2001
From: Nick Foster <nick@nerdnetworks.org>
Date: Mon, 6 Dec 2010 19:41:44 -0800
Subject: u2plus: clock lock pin capitalization fail

---
 usrp2/top/u2plus/u2plus.ucf | 2 +-
 usrp2/top/u2plus/u2plus.v   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

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..5facca298 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
 
-- 
cgit v1.2.3