X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=blobdiff_plain;f=decoders%2Fuart%2Fuart.py;h=92c105ca0c0ff380f7e3c7a363063d2f75432069;hp=2bb61dd86ca546ad119360fedc589626f4f4ff85;hb=2fcd7c22852436c3226de9007e88cb305cce1b00;hpb=2b7160383cc189f721600c04be17a980e216dfd6

diff --git a/decoders/uart/uart.py b/decoders/uart/uart.py
index 2bb61dd..92c105c 100644
--- a/decoders/uart/uart.py
+++ b/decoders/uart/uart.py
@@ -61,8 +61,7 @@ class Decoder(srd.Decoder):
     id = 'uart'
     name = 'UART'
     longname = 'Universal Asynchronous Receiver/Transmitter'
-    desc = 'Universal Asynchronous Receiver/Transmitter (UART)'
-    longdesc = 'TODO.'
+    desc = 'Asynchronous, serial bus.'
     license = 'gplv2+'
     inputs = ['logic']
     outputs = ['uart']
@@ -102,11 +101,9 @@ class Decoder(srd.Decoder):
         self.paritybit = [-1, -1]
         self.stopbit1 = [-1, -1]
         self.startsample = [-1, -1]
-
-        # Initial state.
         self.state = ['WAIT FOR START BIT', 'WAIT FOR START BIT']
-
         self.oldbit = [None, None]
+        self.oldpins = None
 
     def start(self, metadata):
         self.samplerate = metadata['samplerate']
@@ -269,10 +266,12 @@ class Decoder(srd.Decoder):
 
     def decode(self, ss, es, data):
         # TODO: Either RX or TX could be omitted (optional probe).
-        for (samplenum, (rx, tx)) in data:
+        for (self.samplenum, pins) in data:
 
-            # TODO: Start counting at 0 or 1? Increase before or after?
-            self.samplenum += 1
+            # Ignore identical samples early on (for performance reasons).
+            if self.oldpins == pins:
+                continue
+            self.oldpins, (rx, tx) = pins, pins
 
             # First sample: Save RX/TX value.
             if self.oldbit[RX] == None: