I'm trying to integrate Twisted with libusb-1
The libusb-1 Python wrapper offers a USBPoller class to "allow
integration of USB event polling in a file-descriptor monitoring event
loop." The class expects to receive a 'poller' object, again quoting
from the documentation:
poller is a polling instance implementing the following methods:
- register(fd, event_flags)
event_flags have the same meaning as in poll API (POLLIN & POLLOUT)
- unregister(fd)
- poll(timeout)
timeout being a float in seconds, or None if there is no timeout.
It must return a list of (descriptor, event) pairs.
Note: USBPoller is itself a valid poller.
I feel like it should be obvious, but I can't see what would be the
correct way to integrate this with Twisted. My particular application
is to enable networking over the ANT+ protocol via a small USB key.
My approach is that I'm trying to write a transport. When that's
working I can start to build a Protocol. Is that sound?
Any pointers would be welcome. The USBPoller class can be viewed here:
https://github.com/vpelletier/python-libusb1/blob/master/usb1.py
Thanks
Dónal
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