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-rw-r--r--decoders/usb_signalling/pd.py5
1 files changed, 3 insertions, 2 deletions
diff --git a/decoders/usb_signalling/pd.py b/decoders/usb_signalling/pd.py
index c0e0141..ae0f651 100644
--- a/decoders/usb_signalling/pd.py
+++ b/decoders/usb_signalling/pd.py
@@ -329,9 +329,10 @@ class Decoder(srd.Decoder):
elif self.state == 'GET EOP':
self.get_eop(sym)
elif self.state == 'WAIT IDLE':
+ # Skip "all-low" input. Wait for high level on either DP or DM.
pins = self.wait({'skip': 1})
- if pins == (0, 0):
- continue
+ while not pins[0] and not pins[1]:
+ pins = self.wait([{0: 'h'}, {1: 'h'}])
if self.samplenum - self.samplenum_lastedge > 1:
sym = symbols[self.options['signalling']][pins]
self.handle_idle(sym)