Use binho connection singleton

Author: fig1010

adafruit_platformdetect/chip.py

@@ -27,11 +27,6 @@ class Chip:
     """Attempt detection of current chip / CPU."""
     def __init__(self, detector):
         self.detector = detector
-        try:
-            os.environ.get('BLINKA_NOVA'):
-                self._binho = None
-        except KeyError: # no relevant environment var
-            pass
 
     @property
     def id(self): # pylint: disable=invalid-name,too-many-branches,too-many-return-statements
@@ -61,24 +56,12 @@ def id(self): # pylint: disable=invalid-name,too-many-branches,too-many-return-s
             raise RuntimeError('BLINKA_MCP2221 environment variable ' + \
                                'set, but no MCP2221 device found')
         if os.environ.get('BLINKA_NOVA'):
-            # Check if we already have a binho instance
-            if self._binho is not None and self._binho == BINHO:
-                return self._binho
-
-            # import the Binho libraries
-            from binhoHostAdapter import binhoHostAdapter
-            from binhoHostAdapter import binhoUtilities
-
-            utilities = binhoUtilities.binhoUtilities()
-            devices = utilities.listAvailableDevices()
-
-            count = len(devices) 
-
-            if count == 0:
-                self._binho = None
-                raise RuntimeError('BLINKA_BINHO environment variable' + \
-                                   'set, but no Binho host adapter found.')
-            self._binho = BINHO
+            # Check for Nova connection
+            from adafruit_blinka.microcontroller.nova import Connection
+            binho = Connection.getInstance()
+            if binho == None:
+                raise RuntimeError('BLINKA_NOVA environment variable ' + \
+                                   'set, but no NOVA device found')
             return BINHO
 
         platform = sys.platform