avr_isp: Add more parts

[libsigrokdecode.git] / decoders / i2s / pd.py

diff --git a/decoders/i2s/pd.py b/decoders/i2s/pd.py
index 05907976442808cca8118a1b8ee8fc506cd08b7c..054d69e11a36f2cf5966d976f06d38e1a32555b6 100644 (file)
--- a/decoders/i2s/pd.py
+++ b/decoders/i2s/pd.py
@@ -33,9 +33,6 @@ Packet:
 <value>: integer
 '''
 
-class SamplerateError(Exception):
-    pass
-
 class Decoder(srd.Decoder):
     api_version = 3
     id = 'i2s'
@@ -45,6 +42,7 @@ class Decoder(srd.Decoder):
     license = 'gplv2+'
     inputs = ['logic']
     outputs = ['i2s']
+    tags = ['Audio', 'PC']
     channels = (
         {'id': 'sck', 'name': 'SCK', 'desc': 'Bit clock line'},
         {'id': 'ws', 'name': 'WS', 'desc': 'Word select line'},
@@ -60,6 +58,9 @@ class Decoder(srd.Decoder):
     )
 
     def __init__(self):
+        self.reset()
+
+    def reset(self):
         self.samplerate = None
         self.oldws = 1
         self.bitcount = 0
@@ -89,12 +90,12 @@ class Decoder(srd.Decoder):
         self.put(self.ss_block, self.samplenum, self.out_ann, data)
 
     def report(self):
-
         # Calculate the sample rate.
         samplerate = '?'
         if self.ss_block is not None and \
             self.first_sample is not None and \
-            self.ss_block > self.first_sample:
+            self.ss_block > self.first_sample and \
+            self.samplerate:
             samplerate = '%d' % (self.samplesreceived *
                 self.samplerate / (self.ss_block -
                 self.first_sample))
@@ -122,11 +123,9 @@ class Decoder(srd.Decoder):
         return h
 
     def wav_sample(self, sample):
-        return struct.pack('I', self.data)
+        return struct.pack('<I', self.data)
 
     def decode(self):
-        if not self.samplerate:
-            raise SamplerateError('Cannot decode without samplerate.')
         while True:
             # Wait for a rising edge on the SCK pin.
             sck, ws, sd = self.wait({0: 'r'})
@@ -147,10 +146,12 @@ class Decoder(srd.Decoder):
 
                 self.samplesreceived += 1
 
-                idx = 0 if self.oldws else 1
-                c1 = 'Left channel' if self.oldws else 'Right channel'
-                c2 = 'Left' if self.oldws else 'Right'
-                c3 = 'L' if self.oldws else 'R'
+                sck = self.wait({0: 'f'})
+
+                idx = 0 if not self.oldws else 1
+                c1 = 'Left channel' if not self.oldws else 'Right channel'
+                c2 = 'Left' if not self.oldws else 'Right'
+                c3 = 'L' if not self.oldws else 'R'
                 v = '%08x' % self.data
                 self.putpb(['DATA', [c3, self.data]])
                 self.putb([idx, ['%s: %s' % (c1, v), '%s: %s' % (c2, v),
@@ -163,6 +164,8 @@ class Decoder(srd.Decoder):
                                    'word' % (self.bitcount, self.wordlength)]])
 
                 self.wordlength = self.bitcount
+            else:
+                sck = self.wait({0: 'f'})
 
             # Reset decoder state.
             self.data = 0