diff options
| -rw-r--r-- | decoders/usb_signalling/pd.py | 25 |
1 files changed, 7 insertions, 18 deletions
diff --git a/decoders/usb_signalling/pd.py b/decoders/usb_signalling/pd.py index 61844f7..d2a1e8a 100644 --- a/decoders/usb_signalling/pd.py +++ b/decoders/usb_signalling/pd.py @@ -35,7 +35,6 @@ Packet: - 'BIT', <bit> - 'STUFF BIT', None - 'EOP', None - - 'PACKET', <packet> <sym>: - 'J', 'K', 'SE0', or 'SE1' @@ -43,10 +42,6 @@ Packet: <bit>: - 0 or 1 - Note: Symbols like SE0, SE1, and the J that's part of EOP don't yield 'BIT'. - -<packet>: - - A string consisting of '1' and '0' characters, e.g. '11010100'. - - The packet contains only "real" bits, no stuff bits (and no SOF/EOP). ''' # Low-/full-speed symbols. @@ -91,12 +86,11 @@ class Decoder(srd.Decoder): 'signalling': ['Signalling', 'full-speed'], } annotations = [ - ['symbol', 'Symbol'], + ['sym', 'Symbol'], ['sop', 'Start of packet (SOP)'], ['eop', 'End of packet (EOP)'], ['bit', 'Bit'], ['stuffbit', 'Stuff bit'], - ['packet', 'Packet'], ] def __init__(self): @@ -104,7 +98,6 @@ class Decoder(srd.Decoder): self.ss_sop = None self.ss_block = None self.samplenum = 0 - self.packet = '' self.syms = [] self.bitrate = None self.bitwidth = None @@ -132,11 +125,11 @@ class Decoder(srd.Decoder): def putpm(self, data): s, h = self.samplenum, self.halfbit - self.put(self.ss_block - h, self.samplenum + h, self.out_proto, data) + self.put(self.ss_block - h, s + h, self.out_proto, data) def putm(self, data): s, h = self.samplenum, self.halfbit - self.put(self.ss_block - h, self.samplenum + h, self.out_ann, data) + self.put(self.ss_block - h, s + h, self.out_ann, data) def putpb(self, data): s, h = self.samplenum, self.halfbit @@ -164,15 +157,14 @@ class Decoder(srd.Decoder): def handle_bit(self, sym, b): if self.consecutive_ones == 6 and b == '0': - # Stuff bit. Don't add to the packet, reset self.consecutive_ones. + # Stuff bit. self.putpb(['STUFF BIT', None]) self.putb([4, ['SB: %s/%s' % (sym, b)]]) self.consecutive_ones = 0 else: - # Normal bit. Add it to the packet, update self.consecutive_ones. + # Normal bit (not a stuff bit). self.putpb(['BIT', b]) self.putb([3, ['%s/%s' % (sym, b)]]) - self.packet += b if b == '1': self.consecutive_ones += 1 else: @@ -187,13 +179,10 @@ class Decoder(srd.Decoder): self.set_new_target_samplenum() self.oldsym = sym if self.syms[-2:] == ['SE0', 'J']: - # Got an EOP, i.e. we now have a full packet. + # Got an EOP. self.putpm(['EOP', None]) self.putm([2, ['EOP']]) - self.ss_block = self.ss_sop - self.putpm(['PACKET', self.packet]) - self.putm([5, ['PACKET: %s' % self.packet]]) - self.bitnum, self.packet, self.syms, self.state = 0, '', [], 'IDLE' + self.bitnum, self.syms, self.state = 0, [], 'IDLE' self.consecutive_ones = 0 def get_bit(self, sym): |