Update transitioncounter.py to the streaming PD API.
authorKristoffer Sjöberg <ksjoberg@q1.se>
Sat, 12 Nov 2011 23:27:58 +0000 (00:27 +0100)
committerGareth McMullin <gareth@blacksphere.co.nz>
Sun, 20 Nov 2011 03:31:47 +0000 (16:31 +1300)
decoders/transitioncounter.py

index 4cd1670bbc644457720b4eaa031a20134d423c21..23b443e98a86969bf72661dff22019c4b0f9e678 100644 (file)
 ##
 import sigrok
 
-def decode(l):
-       """Counts the low->high and high->low transitions in the specified
-          channel(s) of the signal."""
+lastsample = None
+oldbit = None
+transitions = None
+rising = None
+falling = None
 
-       print(l)
-       sigrok.put(l)
 
-def decode2(inbuf):
+def decode(sampledata):
        """Counts the low->high and high->low transitions in the specified
           channel(s) of the signal."""
-
-       outbuf = ''
-
-       # FIXME: Get the data in the correct format in the first place.
-       inbuf = [ord(x) for x in inbuf]
+       global lastsample
+       global oldbit, transitions, rising, falling
 
        # TODO: Don't hardcode the number of channels.
-       channels = 8
+       channels = 8    
 
-       oldbit = [0] * channels
-       transitions = [0] * channels
-       rising = [0] * channels
-       falling = [0] * channels
+       # FIXME: Get the data in the correct format in the first place.
+       s = ord(sampledata['data'])
 
-       # Initial values.
-       oldbyte = inbuf[0]
-       for i in range(channels):
-               oldbit[i] = (oldbyte & (1 << i)) >> i
+       if lastsample == None:
+               oldbit = [0] * channels
+               transitions = [0] * channels
+               rising = [0] * channels
+               falling = [0] * channels
 
-       # Loop over all samples.
+               # Initial values.
+               lastsample = s
+               for i in range(channels):
+                       oldbit[i] = (lastsample & (1 << i)) >> i
+               
        # TODO: Handle LAs with more/less than 8 channels.
-       for s in inbuf:
-               # Optimization: Skip identical bytes (no transitions).
-               if oldbyte == s:
-                       continue
+       # Optimization: Skip identical bytes (no transitions).
+       if lastsample != s:
                for i in range(channels):
                        curbit = (s & (1 << i)) >> i
                        # Optimization: Skip identical bits (no transitions).
@@ -64,24 +62,15 @@ def decode2(inbuf):
                        elif (oldbit[i] == 1 and curbit == 0):
                                falling[i] += 1
                        oldbit[i] = curbit
-               oldbyte = s
 
-       # Total number of transitions is the sum of rising and falling edges.
-       for i in range(channels):
-               transitions[i] = rising[i] + falling[i]
-
-       outbuf += "Rising edges:  "
-       for i in range(channels):
-               outbuf += str(rising[i]) + " "
-       outbuf += "\nFalling edges: "
-       for i in range(channels):
-               outbuf += str(falling[i]) + " "
-       outbuf += "\nTransitions:   "
-       for i in range(channels):
-               outbuf += str(transitions[i]) + " "
-       outbuf += "\n"
+               # Total number of transitions is the sum of rising and falling edges.
+               for i in range(channels):
+                       transitions[i] = rising[i] + falling[i]
+               
+               lastsample = s
+               print(transitions)
 
-       return outbuf
+       sigrok.put(sampledata)
 
 register = {
        'id': 'transitioncounter',