def setControl(self, request_type, request, value, index, buffer_or_len,
callback=None, user_data=None, timeout=0):
"""
Setup transfer for control use.
request_type, request, value, index: See USBDeviceHandle.controlWrite.
buffer_or_len: either a string (when sending data), or expected data
length (when receiving data)
callback: function to call upon event. Called with transfer as
parameter, return value ignored.
user_data: to pass some data to/from callback
timeout: in milliseconds, how long to wait for devices acknowledgement
or data. Set to 0 to disable.
"""
if self.__submitted:
raise ValueError('Cannot alter a submitted transfer')
if isinstance(buffer_or_len, basestring):
length = len(buffer_or_len)
string_buffer = create_binary_buffer(
' ' * libusb1.LIBUSB_CONTROL_SETUP_SIZE + buffer_or_len)
else:
length = buffer_or_len
string_buffer = create_binary_buffer(length + \
libusb1.LIBUSB_CONTROL_SETUP_SIZE)
self.__initialized = False
libusb1.libusb_fill_control_setup(string_buffer, request_type,
request, value, index, length)
libusb1.libusb_fill_control_transfer(self.__transfer, self.__handle,
string_buffer, self.__ctypesCallbackWrapper, user_data, timeout)
self.__callback = callback
self.__initialized = True
def fillControlTransfer(self, transfer, setup, callback,
user_data, timeout):
libusb1.libusb_fill_control_transfer(transfer, self.handle,
setup, libusb1.libusb_transfer_cb_fn_p(callback), user_data,
timeout)