diff options
| -rw-r--r-- | decoders/parallel/pd.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/decoders/parallel/pd.py b/decoders/parallel/pd.py index a695ca6..cafaefc 100644 --- a/decoders/parallel/pd.py +++ b/decoders/parallel/pd.py @@ -61,6 +61,9 @@ def channel_list(num_channels): l.append(d) return tuple(l) +class ChannelError(Exception): + pass + class Decoder(srd.Decoder): api_version = 2 id = 'parallel' @@ -180,6 +183,9 @@ class Decoder(srd.Decoder): continue self.oldpins = pins + if sum(1 for p in pins if p in (0, 1)) == 0: + raise ChannelError('At least one channel has to be supplied.') + if pins[0] not in (0, 1): self.handle_bits(pins[1:]) else: |