bcm20795.py

@@ -14,8 +14,10 @@
import usb.core
import usb.util

VENDOR_ID = 0x0A5C
DEVICE_ID = 0x5834
SUPPORTED_DEVICES = [
   {'idVendor': 0x0A5C, 'idProduct': 0x5834},
   {'idVendor': 0x0A5C, 'idProduct': 0x5832},
]

logging.basicConfig(level=logging.DEBUG)
logger = logging.getLogger(__name__)
@@ -72,22 +74,38 @@
         if data[1] == 0x61:
            packet = self.recv_packet()
   
   @staticmethod
   def _dev_match(template, candidate):
      for prop, value in template.items():
         if prop not in candidate.__dict__ or candidate.__dict__[prop] != value:
            return False
      return True
	
   @classmethod
   def find(cls, vendor_id, product_id):
   def _dev_matcher(cls, dev):
      for device in SUPPORTED_DEVICES:
         if cls._dev_match(device, dev):
            return True
      return False
	
   @classmethod
   def find(cls):
      logger = logging.getLogger(__name__)
      logger.info('Looking for device {:04X}:{:04X}...'.format(vendor_id, product_id))
      logger.info('Looking for BCM device...')
      
      device = usb.core.find(idVendor=vendor_id, idProduct=product_id)
      device = usb.core.find(custom_match=cls._dev_matcher)
      if device is None:
         raise Exception('Cannot find device {:04X}:{:04X}'.format(vendor_id, product_id))
         raise Exception('Cannot find BCM device - check list of supported devices')
      logger.info('Found {:04X}:{:04X}'.format(device.idVendor, device.idProduct))
      
      logger.debug('Enumerating interfaces...')
      configuration = device.get_active_configuration()
      bcm_interface = None
      for interface in configuration:
         if interface.bInterfaceClass == 0xff and interface.iInterface == 0x08:
            if bcm_interface is not None:
               raise Exception('More than one vendor-specific interface found!')
            bcm_interface = interface
            break
      if bcm_interface is None:
         raise Exception('Cannot find vendor-specific interface')
      logger.debug('Interface found: {}'.format(bcm_interface._str()))
@@ -158,7 +176,7 @@
      print('Usage: {} [on|off]'.format(sys.argv[0]))
      sys.exit(2)
   
   communicator = BcmCommunicator.find(VENDOR_ID, DEVICE_ID)
   communicator = BcmCommunicator.find()
   if sys.argv[1] == 'on':
      logger.info('Turning NFC on...')
      turn_on(communicator)