Neato XV-11: Difference between revisions

@@ Line 425: / Line 425: @@
 <br />
   def checksum(data):
-   “”“Compute and return the checksum as an int.”“”
+  “”“Compute and return the checksum as an int.”“”
-   # group the data by word, little-endian
+  # group the data by word, little-endian
-   data_list = []
+  data_list = []
-   for t in range(10):
+  for t in range(10):
-       data_list.append( data2*t + (data2*t+1<<8) )
+    data_list.append( data2*t + (data2*t+1<<8) )
-   # compute the checksum on 32 bits
+  # compute the checksum on 32 bits
-   chk32 = 0
+  chk32 = 0
-   for d in data_list:
+  for d in data_list:
-       chk32 = (chk32 << 1) + d
+    chk32 = (chk32 << 1) + d
-   # return a value wrapped around on 15bits, and truncated to still fit into 15 bits
+  # return a value wrapped around on 15bits, and truncated to still fit into 15 bits
-   checksum = (chk32 & 0x7FFF) + ( chk32 >> 15 ) # wrap around to fit into 15 bits
+  checksum = (chk32 & 0x7FFF) + ( chk32 >> 15 ) # wrap around to fit into 15 bits
-   checksum = checksum & 0x7FFF # truncate to 15 bits
+  checksum = checksum & 0x7FFF # truncate to 15 bits
-   return int( checksum )
+  return int( checksum )
-<br />
 ==== Data format for firmware 2.1 (Sparkfun scans, pre-production units) ====