def _open(self, type=None, serial=None):
if self._handle != None:
self._close()
for dev in usb.get_device_list():
desc = dev.descriptor
if desc.idVendor==0x04D8 \
and desc.idProduct==0xFBC3 \
and (type==None or desc.bcdDevice==_bcd(type)) \
and (serial==None or desc.iSerialNumber!=0):
with self._io__Lock:
handle = usb.open(dev) # Need to open the device to query string descriptors
try:
## s = usb.get_string( handle, desc.iSerialNumber )
s = _repeat( usb.get_string, handle, desc.iSerialNumber )
if (serial==None or s.endswith( str(serial) )):
##usb.set_configuration( handle, 1 )
_repeat( usb.set_configuration, handle, 0 ) # Workaround for xHCI bug
_repeat( usb.set_configuration, handle, 1 )
_repeat( usb.claim_interface, handle, 0 )
self._handle = handle
self._serial = s
self._type = _bin(desc.bcdDevice)
nepts = dev.config[0].interface[0].altsetting[0].bNumEndpoints
for i in range(nepts):
ep = dev.config[0].interface[0].altsetting[0].\
endpoint[i].bEndpointAddress
size = dev.config[0].interface[0].altsetting[0].\
endpoint[i].wMaxPacketSize
if (ep&0x80): self._ep_in, self._size_in = ep, size
else: self._ep_out, self._size_out = ep, size
return
except:
usb.close(handle)
raise
raise Exception('Device not found.')
def close(self):
""" Close the device. Communication is not possible afterwards. """
if self._handle != None:
usb.close( self._handle )
self._handle = None
self._serial = ''
self._type = 0
self._ep_in, self._size_in = 0, 0
self._ep_out, self._size_out = 0, 0
def mbug_list(type=None):
"""Return a list of all attached MBUG devices of a certain type."""
found = []
for dev in usb.get_device_list():
desc = dev.descriptor
if desc.idVendor==0x04D8 \
and desc.idProduct==0xFBC3\
and (type==None or desc.bcdDevice==_bcd(type)):
handle = usb.open(dev)
try:
## s = usb.get_string( handle, desc.iSerialNumber )
s = _repeat( usb.get_string, handle, desc.iSerialNumber )
if s!=None: found.append(s)
finally:
usb.close(handle)
return found