src/adafruit_blinka/microcontroller/nova/__init__.py

   1 class Connection:
   2     __instance = None
   3     @staticmethod
   4     def getInstance():
   5         """ Static access method. """
   6         if Connection.__instance == None:
   7             Connection()
   8         return Connection.__instance
   9
  10     def __init__(self):
  11         """ Virtually private constructor. """
  12         if Connection.__instance != None:
  13             raise Exception("This class is a singleton!")
  14         else:
  15             from binhoHostAdapter import binhoHostAdapter
  16             from binhoHostAdapter import binhoUtilities
  17
  18             utilities = binhoUtilities.binhoUtilities()
  19             devices = utilities.listAvailableDevices()
  20
  21             if len(devices) > 0:
  22                 Connection.__instance = binhoHostAdapter.binhoHostAdapter(devices[0])
  23             else:
  24                 raise RuntimeError('No Binho Nova found!')