X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=decoders%2Fpca9571%2Fpd.py;h=ea8715d6d2ca15c1fecfd5d7b61ddc18a9eae215;hb=de219b2b77dba06815869823789458581500ca03;hp=af0ad2d1763f253d4627a10616549a50bd1e149d;hpb=9b6c0354ce4bab15c524928f2c0059f1df543ad9;p=libsigrokdecode.git

diff --git a/decoders/pca9571/pd.py b/decoders/pca9571/pd.py
index af0ad2d..ea8715d 100644
--- a/decoders/pca9571/pd.py
+++ b/decoders/pca9571/pd.py
@@ -56,24 +56,23 @@ class Decoder(srd.Decoder):
     def reset(self):
         self.state = 'IDLE'
         self.last_write = 0xFF # Chip port default state is high.
-
-        self.logic_es = 1
-        self.logic_data = []
-        for i in range(NUM_OUTPUT_CHANNELS):
-            self.logic_data.append(bytes([1]))
+        self.last_write_es = 0
 
     def start(self):
         self.out_ann = self.register(srd.OUTPUT_ANN)
         self.out_logic = self.register(srd.OUTPUT_LOGIC)
 
+    def flush(self):
+        self.put_logic_states()
+
     def putx(self, data):
         self.put(self.ss, self.es, self.out_ann, data)
 
     def put_logic_states(self):
-        if (self.es > self.logic_es):
-            for i in range(NUM_OUTPUT_CHANNELS):
-                self.put(self.logic_es, self.es, self.out_logic, [i, self.logic_data[i]])
-            self.logic_es = self.es
+        if (self.es > self.last_write_es):
+            data = bytes([self.last_write])
+            self.put(self.last_write_es, self.es, self.out_logic, [0, data])
+            self.last_write_es = self.es
 
     def handle_io(self, b):
         if self.state == 'READ DATA':
@@ -83,14 +82,12 @@ class Decoder(srd.Decoder):
                                '(%02X) are different' % self.last_write]])
         else:
             operation = ['Outputs set', 'W']
+            self.put_logic_states()
             self.last_write = b
+
         self.putx([1, [operation[0] + ': %02X' % b,
                        operation[1] + ': %02X' % b]])
 
-        for i in range(NUM_OUTPUT_CHANNELS):
-            bit = (b & (1 << i)) != 0
-            self.logic_data[i] = bytes([bit])
-
     def check_correct_chip(self, addr):
         if addr != 0x25:
             self.putx([2, ['Warning: I²C slave 0x%02X not a PCA9571 '
@@ -102,8 +99,6 @@ class Decoder(srd.Decoder):
         cmd, databyte = data
         self.ss, self.es = ss, es
 
-        self.put_logic_states()
-
         # State machine.
         if cmd in ('ACK', 'BITS'): # Discard 'ACK' and 'BITS'.
             pass