def setInterrupt(self, endpoint, buffer_or_len, callback=None,
user_data=None, timeout=0):
"""
Setup transfer for interrupt use.
endpoint: endpoint to submit transfer to (implicitly sets transfer
direction).
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')
string_buffer = create_binary_buffer(buffer_or_len)
self.__initialized = False
libusb1.libusb_fill_interrupt_transfer(self.__transfer, self.__handle,
endpoint, string_buffer, sizeof(string_buffer),
self.__ctypesCallbackWrapper, user_data, timeout)
self.__callback = callback
self.__initialized = True
def fillInterruptTransfer(self, transfer, endpoint, string_buffer,
callback, user_data, timeout):
libusb1.libusb_fill_interrupt_transfer(transfer, self.handle,
endpoint, string_buffer, sizeof(string_buffer),
libusb1.libusb_transfer_cb_fn_p(callback), user_data,
timeout)
