def usb_callback(transfer):
if self.usb_poller.done:
return # shutting down
if transfer.isSubmitted():
return # transfer not completed
status = transfer.getStatus()
if status == usb1.TRANSFER_CANCELLED:
usb_transfer_type = transfer.getType()
if usb_transfer_type == usb1.TRANSFER_TYPE_CONTROL:
transfer_type = "CONTROL"
if usb_transfer_type == usb1.TRANSFER_TYPE_BULK:
transfer_type = "BULK"
endpoint = transfer.getEndpoint()
if endpoint & usb1.ENDPOINT_DIR_MASK == usb1.ENDPOINT_IN:
endpoint_dir = "IN"
if endpoint & usb1.ENDPOINT_DIR_MASK == usb1.ENDPOINT_OUT:
endpoint_dir = "OUT"
logger.trace("USB: %s EP%d %s (cancelled)",
transfer_type, endpoint & 0x7f, endpoint_dir)
cancel_future.set_result(None)
elif result_future.cancelled():
pass
elif status == usb1.TRANSFER_COMPLETED:
if is_read:
result_future.set_result(transfer.getBuffer()[:transfer.getActualLength()])
else:
result_future.set_result(None)
elif status == usb1.TRANSFER_STALL:
result_future.set_exception(usb1.USBErrorPipe())
elif status == usb1.TRANSFER_NO_DEVICE:
result_future.set_exception(GlasgowDeviceError("device lost"))
else:
result_future.set_exception(GlasgowDeviceError(
"transfer error: {}".format(usb1.libusb1.libusb_transfer_status(status))))
def usb_callback(transfer):
if transfer.isSubmitted():
return # transfer not completed
if future.cancelled():
return # future cancelled
status = transfer.getStatus()
if status == usb1.TRANSFER_COMPLETED:
if is_read:
future.set_result(transfer.getBuffer()[:transfer.getActualLength()])
else:
future.set_result(None)
elif status == usb1.TRANSFER_CANCELLED:
future.cancel()
elif status == usb1.TRANSFER_STALL:
future.set_exception(usb1.USBErrorPipe())
elif status == usb1.TRANSFER_NO_DEVICE:
future.set_exception(GlasgowDeviceError("device lost"))
else:
future.set_exception(GlasgowDeviceError("transfer error: {}".format(status)))
