add LIN protocol decoder

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

diff --git a/decoders/usb_request/pd.py b/decoders/usb_request/pd.py
index 1bd287851f5a90a9b230adbf21ef24d3c2a37da8..e77debc46d784a06372960285cea3844bfab8585 100644 (file)
--- a/decoders/usb_request/pd.py
+++ b/decoders/usb_request/pd.py
@@ -136,6 +136,9 @@ class Decoder(srd.Decoder):
     )
 
     def __init__(self):
+        self.reset()
+
+    def reset(self):
         self.samplerate = None
         self.request = {}
         self.request_id = 0
@@ -168,7 +171,8 @@ class Decoder(srd.Decoder):
     def metadata(self, key, value):
         if key == srd.SRD_CONF_SAMPLERATE:
             self.samplerate = value
-            self.secs_per_sample = float(1) / float(self.samplerate)
+            if self.samplerate:
+                self.secs_per_sample = float(1) / float(self.samplerate)
 
     def start(self):
         self.out_binary = self.register(srd.OUTPUT_BINARY)