Factor out bcd2int() into common/srdhelper.

[libsigrokdecode.git] / decoders / dcf77 / pd.py

diff --git a/decoders/dcf77/pd.py b/decoders/dcf77/pd.py
index 69783c648f8a25f9a7ac2151717f6e7e93e727cc..cbdfa872955aea7d9d3711aba7bc3730636f3f9c 100644 (file)
--- a/decoders/dcf77/pd.py
+++ b/decoders/dcf77/pd.py
@@ -20,13 +20,13 @@
 
 import sigrokdecode as srd
 import calendar
+from srdhelper import bcd2int
 
-# Return the specified BCD number (max. 8 bits) as integer.
-def bcd2int(b):
-    return (b & 0x0f) + ((b >> 4) * 10)
+class SamplerateError(Exception):
+    pass
 
 class Decoder(srd.Decoder):
-    api_version = 1
+    api_version = 2
     id = 'dcf77'
     name = 'DCF77'
     longname = 'DCF77 time protocol'
@@ -77,7 +77,6 @@ class Decoder(srd.Decoder):
         self.dcf77_bitnumber_is_known = 0
 
     def start(self):
-        # self.out_python = self.register(srd.OUTPUT_PYTHON)
         self.out_ann = self.register(srd.OUTPUT_ANN)
 
     def metadata(self, key, value):
@@ -240,14 +239,14 @@ class Decoder(srd.Decoder):
             # Even parity over date bits (36-58): DCF77 bit 58.
             parity = self.datebits.count(1)
             s = 'OK' if ((parity % 2) == 0) else 'INVALID!'
-            self.putx([16, ['Date parity: %s' % s, 'DP: %s' %s]])
+            self.putx([16, ['Date parity: %s' % s, 'DP: %s' % s]])
             self.datebits = []
         else:
             raise Exception('Invalid DCF77 bit: %d' % c)
 
     def decode(self, ss, es, data):
-        if self.samplerate is None:
-            raise Exception("Cannot decode without samplerate.")
+        if not self.samplerate:
+            raise SamplerateError('Cannot decode without samplerate.')
         for (self.samplenum, pins) in data:
 
             # Ignore identical samples early on (for performance reasons).
@@ -311,8 +310,4 @@ class Decoder(srd.Decoder):
 
                 self.state = 'WAIT FOR RISING EDGE'
 
-            else:
-                raise Exception('Invalid state: %s' % self.state)
-
             self.oldval = val
-