From: Gerhard Sittig <redacted>
Date: Tue, 28 Jul 2020 15:38:45 +0000 (+0200)
Subject: sle44xx: don't assume RESET at the start of the capture
X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=commitdiff_plain;h=d25293e6e4bf8126223c885e2bdccde9118800e7

sle44xx: don't assume RESET at the start of the capture

The decoder cannot know the state of the input signal before the start
of the capture. Assuming the RESET state results in incorrect output for
data bits which we don't know the context of. Start from unknown state
instead until a reliable condition is seen to synchronize to.
---

diff --git a/decoders/sle44xx/pd.py b/decoders/sle44xx/pd.py
index a53a1ea..f84bea6 100644
--- a/decoders/sle44xx/pd.py
+++ b/decoders/sle44xx/pd.py
@@ -83,7 +83,7 @@ class Decoder(srd.Decoder):
     def reset(self):
         self.ss = self.es = self.ss_byte = -1
         self.bits = []
-        self.cmd = 'RESET'
+        self.cmd = None
 
     def metadata(self, key, value):
         if key == srd.SRD_CONF_SAMPLERATE:
@@ -153,7 +153,8 @@ class Decoder(srd.Decoder):
             self.put(bit_ss, bit_es, self.out_ann, [cls, texts])
 
         cls, texts = lookup_proto_ann_txt(self.cmd, {'data': databyte})
-        self.putx([cls, texts])
+        if cls:
+            self.putx([cls, texts])
 
         # Done with this packet.
         self.bits = []