src/adafruit_blinka/microcontroller/nova/__init__.py

   1 """Generic Connection class for Binho Nova to keep track of connection"""
   2 from .pin import *
   3
   4
   5 class Connection:
   6     """Connection class"""
   7
   8     __instance = None
   9
  10     @staticmethod
  11     def getInstance():
  12         """Static access method."""
  13         if Connection.__instance is None:
  14             Connection()
  15         return Connection.__instance
  16
  17     def __init__(self):
  18         """Virtually private constructor."""
  19         if Connection.__instance is not None:
  20             raise Exception("This class is a singleton!")
  21
  22         # pylint: disable=import-outside-toplevel
  23         from binhoHostAdapter import binhoHostAdapter
  24         from binhoHostAdapter import binhoUtilities
  25
  26         # pylint: enable=import-outside-toplevel
  27         devices = binhoUtilities.listAvailableDevices()
  28
  29         if len(devices) > 0:
  30             Connection.__instance = binhoHostAdapter.binhoHostAdapter(devices[0])
  31         else:
  32             raise RuntimeError("No Binho Nova found!")