X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=blobdiff_plain;f=decoders%2Fdcf77%2Fpd.py;h=14d8637ff00fa287a928e38c18319e96c80c0dd2;hp=3f0ff50c54809cef8bc04a59e61f0ba5a683bcca;hb=21cda9512f29947617da45822ab524b1f76f56c1;hpb=e28f7aee3b96afeb543e0c3c29e3950ddd61a490

diff --git a/decoders/dcf77/pd.py b/decoders/dcf77/pd.py
index 3f0ff50..14d8637 100644
--- a/decoders/dcf77/pd.py
+++ b/decoders/dcf77/pd.py
@@ -25,6 +25,9 @@ import calendar
 def bcd2int(b):
     return (b & 0x0f) + ((b >> 4) * 10)
 
+class SamplerateError(Exception):
+    pass
+
 class Decoder(srd.Decoder):
     api_version = 2
     id = 'dcf77'
@@ -245,8 +248,8 @@ class Decoder(srd.Decoder):
             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).