Merged r9433:9527 from features/gr-usrp2 into trunk. Adds usrp2 and gr-usrp2 top-level components. Trunk passes distcheck with mb-gcc installed, but currently not without them. The key issue is that when mb-gcc is not installed, the build system skips over the usrp2/firmware directory, and the firmware include files don't get put into the dist tarball. But we can't do the usual DIST_SUBDIRS method as the firmware is a subpackage.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9528 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 165 insertions, 0 deletions

diff --git a/usrp2/fpga/opencores/8b10b/decode_8b10b.v b/usrp2/fpga/opencores/8b10b/decode_8b10b.v
new file mode 100644
index 000000000..0b2a8ac59
--- /dev/null
+++ b/usrp2/fpga/opencores/8b10b/decode_8b10b.v
@@ -0,0 +1,165 @@
+// Chuck Benz, Hollis, NH   Copyright (c)2002
+//
+// The information and description contained herein is the
+// property of Chuck Benz.
+//
+// Permission is granted for any reuse of this information
+// and description as long as this copyright notice is
+// preserved.  Modifications may be made as long as this
+// notice is preserved.
+
+// per Widmer and Franaszek
+
+module decode_8b10b (datain, dispin, dataout, dispout, code_err, disp_err) ;
+  input [9:0]   datain ;
+  input		dispin ;
+  output [8:0]	dataout ;
+  output	dispout ;
+  output	code_err ;
+  output	disp_err ;
+
+  wire ai = datain[0] ;
+  wire bi = datain[1] ;
+  wire ci = datain[2] ;
+  wire di = datain[3] ;
+  wire ei = datain[4] ;
+  wire ii = datain[5] ;
+  wire fi = datain[6] ;
+  wire gi = datain[7] ;
+  wire hi = datain[8] ;
+  wire ji = datain[9] ;
+
+  wire aeqb = (ai & bi) | (!ai & !bi) ;
+  wire ceqd = (ci & di) | (!ci & !di) ;
+  wire p22 = (ai & bi & !ci & !di) |
+	     (ci & di & !ai & !bi) |
+	     ( !aeqb & !ceqd) ;
+  wire p13 = ( !aeqb & !ci & !di) |
+	     ( !ceqd & !ai & !bi) ;
+  wire p31 = ( !aeqb & ci & di) |
+	     ( !ceqd & ai & bi) ;
+
+  wire p40 = ai & bi & ci & di ;
+  wire p04 = !ai & !bi & !ci & !di ;
+
+  wire disp6a = p31 | (p22 & dispin) ; // pos disp if p22 and was pos, or p31.
+   wire disp6a2 = p31 & dispin ;  // disp is ++ after 4 bits
+   wire disp6a0 = p13 & ! dispin ; // -- disp after 4 bits
+    
+  wire disp6b = (((ei & ii & ! disp6a0) | (disp6a & (ei | ii)) | disp6a2 |
+		  (ei & ii & di)) & (ei | ii | di)) ;
+
+  // The 5B/6B decoding special cases where ABCDE != abcde
+
+  wire p22bceeqi = p22 & bi & ci & (ei == ii) ;
+  wire p22bncneeqi = p22 & !bi & !ci & (ei == ii) ;
+  wire p13in = p13 & !ii ;
+  wire p31i = p31 & ii ;
+  wire p13dei = p13 & di & ei & ii ;
+  wire p22aceeqi = p22 & ai & ci & (ei == ii) ;
+  wire p22ancneeqi = p22 & !ai & !ci & (ei == ii) ;
+  wire p13en = p13 & !ei ;
+  wire anbnenin = !ai & !bi & !ei & !ii ;
+  wire abei = ai & bi & ei & ii ;
+  wire cdei = ci & di & ei & ii ;
+  wire cndnenin = !ci & !di & !ei & !ii ;
+
+  // non-zero disparity cases:
+  wire p22enin = p22 & !ei & !ii ;
+  wire p22ei = p22 & ei & ii ;
+  //wire p13in = p12 & !ii ;
+  //wire p31i = p31 & ii ;
+  wire p31dnenin = p31 & !di & !ei & !ii ;
+  //wire p13dei = p13 & di & ei & ii ;
+  wire p31e = p31 & ei ;
+
+  wire compa = p22bncneeqi | p31i | p13dei | p22ancneeqi | 
+		p13en | abei | cndnenin ;
+  wire compb = p22bceeqi | p31i | p13dei | p22aceeqi | 
+		p13en | abei | cndnenin ;
+  wire compc = p22bceeqi | p31i | p13dei | p22ancneeqi | 
+		p13en | anbnenin | cndnenin ;
+  wire compd = p22bncneeqi | p31i | p13dei | p22aceeqi |
+		p13en | abei | cndnenin ;
+  wire compe = p22bncneeqi | p13in | p13dei | p22ancneeqi | 
+		p13en | anbnenin | cndnenin ;
+
+  wire ao = ai ^ compa ;
+  wire bo = bi ^ compb ;
+  wire co = ci ^ compc ;
+  wire do = di ^ compd ;
+  wire eo = ei ^ compe ;
+
+  wire feqg = (fi & gi) | (!fi & !gi) ;
+  wire heqj = (hi & ji) | (!hi & !ji) ;
+  wire fghj22 = (fi & gi & !hi & !ji) |
+		(!fi & !gi & hi & ji) |
+		( !feqg & !heqj) ;
+  wire fghjp13 = ( !feqg & !hi & !ji) |
+		 ( !heqj & !fi & !gi) ;
+  wire fghjp31 = ( (!feqg) & hi & ji) |
+		 ( !heqj & fi & gi) ;
+
+  wire dispout = (fghjp31 | (disp6b & fghj22) | (hi & ji)) & (hi | ji) ;
+
+  wire ko = ( (ci & di & ei & ii) | ( !ci & !di & !ei & !ii) |
+		(p13 & !ei & ii & gi & hi & ji) |
+		(p31 & ei & !ii & !gi & !hi & !ji)) ;
+
+  wire alt7 =   (fi & !gi & !hi & // 1000 cases, where disp6b is 1
+		 ((dispin & ci & di & !ei & !ii) | ko |
+		  (dispin & !ci & di & !ei & !ii))) |
+		(!fi & gi & hi & // 0111 cases, where disp6b is 0
+		 (( !dispin & !ci & !di & ei & ii) | ko |
+		  ( !dispin & ci & !di & ei & ii))) ;
+
+  wire k28 = (ci & di & ei & ii) | ! (ci | di | ei | ii) ;
+  // k28 with positive disp into fghi - .1, .2, .5, and .6 special cases
+  wire k28p = ! (ci | di | ei | ii) ;
+  wire fo = (ji & !fi & (hi | !gi | k28p)) |
+	    (fi & !ji & (!hi | gi | !k28p)) |
+	    (k28p & gi & hi) |
+	    (!k28p & !gi & !hi) ;
+  wire go = (ji & !fi & (hi | !gi | !k28p)) |
+	    (fi & !ji & (!hi | gi |k28p)) |
+	    (!k28p & gi & hi) |
+	    (k28p & !gi & !hi) ;
+  wire ho = ((ji ^ hi) & ! ((!fi & gi & !hi & ji & !k28p) | (!fi & gi & hi & !ji & k28p) | 
+			    (fi & !gi & !hi & ji & !k28p) | (fi & !gi & hi & !ji & k28p))) |
+	    (!fi & gi & hi & ji) | (fi & !gi & !hi & !ji) ;
+
+  wire disp6p = (p31 & (ei | ii)) | (p22 & ei & ii) ;
+  wire disp6n = (p13 & ! (ei & ii)) | (p22 & !ei & !ii) ;
+  wire disp4p = fghjp31 ;
+  wire disp4n = fghjp13 ;
+
+  assign code_err = p40 | p04 | (fi & gi & hi & ji) | (!fi & !gi & !hi & !ji) |
+		    (p13 & !ei & !ii) | (p31 & ei & ii) | 
+		    (ei & ii & fi & gi & hi) | (!ei & !ii & !fi & !gi & !hi) | 
+		    (ei & !ii & gi & hi & ji) | (!ei & ii & !gi & !hi & !ji) |
+		    (!p31 & ei & !ii & !gi & !hi & !ji) |
+		    (!p13 & !ei & ii & gi & hi & ji) |
+		    (((ei & ii & !gi & !hi & !ji) | 
+		      (!ei & !ii & gi & hi & ji)) &
+		     ! ((ci & di & ei) | (!ci & !di & !ei))) |
+		    (disp6p & disp4p) | (disp6n & disp4n) |
+		    (ai & bi & ci & !ei & !ii & ((!fi & !gi) | fghjp13)) |
+		    (!ai & !bi & !ci & ei & ii & ((fi & gi) | fghjp31)) |
+		    (fi & gi & !hi & !ji & disp6p) |
+		    (!fi & !gi & hi & ji & disp6n) |
+		    (ci & di & ei & ii & !fi & !gi & !hi) |
+		    (!ci & !di & !ei & !ii & fi & gi & hi) ;
+
+  assign dataout = {ko, ho, go, fo, eo, do, co, bo, ao} ;
+
+  // my disp err fires for any legal codes that violate disparity, may fire for illegal codes
+   assign disp_err = ((dispin & disp6p) | (disp6n & !dispin) |
+		      (dispin & !disp6n & fi & gi) |
+		      (dispin & ai & bi & ci) |
+		      (dispin & !disp6n & disp4p) |
+		      (!dispin & !disp6p & !fi & !gi) |
+		      (!dispin & !ai & !bi & !ci) |
+		      (!dispin & !disp6p & disp4n) |
+		      (disp6p & disp4p) | (disp6n & disp4n)) ;
+
+endmodule