From 15a8a05595c72d328abdea8e3b23f1b558cc46bf Mon Sep 17 00:00:00 2001
From: Gerhard Sittig <gerhard.sittig@gmx.net>
Date: Sun, 28 Jan 2018 20:49:48 +0100
Subject: graycode, morse, pwm, usb_request, wiegand: cope with absent sample
rate
Improve robustness of some more protocol decoders. Few of them never
checked for the availability of a sample rate in the first place, others
checked for the presence of a spec but would not cope with a value of 0.
Some checked the value only after processing it, which could result in
runtime errors.
This change is motivated by bug #1118.
---
decoders/pwm/pd.py | 7 +++++++
1 file changed, 7 insertions(+)
(limited to 'decoders/pwm/pd.py')
diff --git a/decoders/pwm/pd.py b/decoders/pwm/pd.py
index 2301523..9770445 100644
--- a/decoders/pwm/pd.py
+++ b/decoders/pwm/pd.py
@@ -20,6 +20,9 @@
import sigrokdecode as srd
+class SamplerateError(Exception):
+ pass
+
class Decoder(srd.Decoder):
api_version = 3
id = 'pwm'
@@ -52,6 +55,7 @@ class Decoder(srd.Decoder):
self.reset()
def reset(self):
+ self.samplerate = None
self.ss_block = self.es_block = None
def metadata(self, key, value):
@@ -89,6 +93,9 @@ class Decoder(srd.Decoder):
self.put(self.ss_block, self.es_block, self.out_binary, data)
def decode(self):
+ if not self.samplerate:
+ raise SamplerateError('Cannot decode without samplerate.')
+
num_cycles = 0
average = 0
--
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