seven_segment: add option to display unknown characters

option show_unknown=yes will display unknown 7-segment characters as
an octothorpe ('#').

Signed-off-by: Ben Gardiner <redacted>

diff --git a/decoders/seven_segment/pd.py b/decoders/seven_segment/pd.py
index 87714bbcd81483df06817f9aa374c0b31d2bd293..eedacf93e3b2d7a9460fae3405036f64484cfb97 100644 (file)
--- a/decoders/seven_segment/pd.py
+++ b/decoders/seven_segment/pd.py
@@ -67,6 +67,8 @@ class Decoder(srd.Decoder):
     options = (
         {'id': 'polarity', 'desc': 'Expected polarity',
             'default': 'common-cathode', 'values': ('common-cathode', 'common-anode')},
+        {'id': 'show_unknown', 'desc': 'Display Unknown characters as #',
+            'default': 'no', 'values': ('yes', 'no')},
     )
     annotations = (
         ('decoded-digit', 'Decoded digit'),
@@ -120,6 +122,9 @@ class Decoder(srd.Decoder):
             # Convert to character string.
             digit = self.pins_to_hex(oldpins[:7])
 
+            if digit is None and self.options['show_unknown'] == 'yes':
+                digit = '#'
+
             if digit is not None:
                 dp = oldpins[7]