Merge branch 'master' into u1e_newbuild

Made so Makefile changes as well to get it to build
* master:
  new make works on ise12
  produces good bin files
  first attempt at cleaning up the build system
  get rid of debug stuff to help timing
  move u2_core into u2_rev3 directory to simplify directory structure and save headaches

Conflicts:
	usrp2/fifo/fifo36_to_fifo18.v
	usrp2/top/u2_rev3/Makefile
	usrp2/top/u2_rev3/Makefile.udp
	usrp2/top/u2_rev3/u2_core_udp.v

1 files changed, 45 insertions, 0 deletions

diff --git a/usrp2/fifo/fifo36_to_fifo19.v b/usrp2/fifo/fifo36_to_fifo19.v
new file mode 100644
index 000000000..517a2a476
--- /dev/null
+++ b/usrp2/fifo/fifo36_to_fifo19.v
@@ -0,0 +1,45 @@
+
+// Parameter LE tells us if we are little-endian.  
+// Little-endian means send lower 16 bits first.
+// Default is big endian (network order), send upper bits first.
+
+module fifo36_to_fifo19
+  #(parameter LE=0)
+   (input clk, input reset, input clear,
+    input [35:0] f36_datain,
+    input f36_src_rdy_i,
+    output f36_dst_rdy_o,
+    
+    output [18:0] f19_dataout,
+    output f19_src_rdy_o,
+    input f19_dst_rdy_i );
+   
+   wire   f36_sof  = f36_datain[32];
+   wire   f36_eof  = f36_datain[33];
+   wire   f36_occ  = f36_datain[35:34];
+   
+   reg 	  phase;
+   
+   wire   half_line 	   = f36_eof & ((f36_occ==1)|(f36_occ==2));
+   
+   assign f19_dataout[15:0] = (LE ^ phase) ? f36_datain[15:0] : f36_datain[31:16];
+   assign f19_dataout[16]  = phase ? 0 : f36_sof;
+   assign f19_dataout[17]  = phase ? f36_eof : half_line;
+   assign f19_dataout[18]  = f19_dataout[17] & ((f36_occ==1)|(f36_occ==3));
+   
+   assign f19_src_rdy_o    = f36_src_rdy_i;
+   assign f36_dst_rdy_o    = (phase | half_line) & f19_dst_rdy_i;
+   
+   wire   f19_xfer 	   = f19_src_rdy_o & f19_dst_rdy_i;
+   wire   f36_xfer 	   = f36_src_rdy_i & f36_dst_rdy_o;
+   
+   always @(posedge clk)
+     if(reset)
+       phase 		  <= 0;
+     else if(f36_xfer)
+       phase 		  <= 0;
+     else if(f19_xfer)
+       phase 		  <= 1;
+   
+   
+endmodule // fifo36_to_fifo19