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Diffstat (limited to 'fpga/usrp2/opencores/8b10b/decode_8b10b.v')
| -rw-r--r-- | fpga/usrp2/opencores/8b10b/decode_8b10b.v | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/fpga/usrp2/opencores/8b10b/decode_8b10b.v b/fpga/usrp2/opencores/8b10b/decode_8b10b.v deleted file mode 100644 index 0b2a8ac59..000000000 --- a/fpga/usrp2/opencores/8b10b/decode_8b10b.v +++ /dev/null @@ -1,165 +0,0 @@ -// 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 |