511 lines
19 KiB
Python
511 lines
19 KiB
Python
# -*- python-mode -*-
|
|
# -*- coding: UTF-8 -*-
|
|
|
|
## Copyright (C) 2012-2013 Daniel Pavel
|
|
##
|
|
## This program is free software; you can redistribute it and/or modify
|
|
## it under the terms of the GNU General Public License as published by
|
|
## the Free Software Foundation; either version 2 of the License, or
|
|
## (at your option) any later version.
|
|
##
|
|
## This program is distributed in the hope that it will be useful,
|
|
## but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
## GNU General Public License for more details.
|
|
##
|
|
## You should have received a copy of the GNU General Public License along
|
|
## with this program; if not, write to the Free Software Foundation, Inc.,
|
|
## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
|
|
# Base low-level functions used by the API proper.
|
|
# Unlikely to be used directly unless you're expanding the API.
|
|
|
|
from __future__ import absolute_import, division, print_function, unicode_literals
|
|
|
|
from collections import namedtuple
|
|
from logging import DEBUG as _DEBUG
|
|
from logging import getLogger
|
|
from random import getrandbits as _random_bits
|
|
from time import time as _timestamp
|
|
|
|
import hidapi as _hid
|
|
|
|
from . import hidpp10 as _hidpp10
|
|
from . import hidpp20 as _hidpp20
|
|
from .base_usb import ALL as _RECEIVER_USB_IDS
|
|
from .base_usb import WIRED_DEVICES as _WIRED_DEVICE_IDS
|
|
from .common import KwException as _KwException
|
|
from .common import pack as _pack
|
|
from .common import strhex as _strhex
|
|
|
|
_log = getLogger(__name__)
|
|
del getLogger
|
|
|
|
#
|
|
#
|
|
#
|
|
|
|
_SHORT_MESSAGE_SIZE = 7
|
|
_LONG_MESSAGE_SIZE = 20
|
|
_MEDIUM_MESSAGE_SIZE = 15
|
|
_MAX_READ_SIZE = 32
|
|
|
|
# mapping from report_id to message length
|
|
report_lengths = {0x10: _SHORT_MESSAGE_SIZE, 0x11: _LONG_MESSAGE_SIZE, 0x20: _MEDIUM_MESSAGE_SIZE, 0x21: _MAX_READ_SIZE}
|
|
"""Default timeout on read (in seconds)."""
|
|
DEFAULT_TIMEOUT = 4
|
|
# the receiver itself should reply very fast, within 500ms
|
|
_RECEIVER_REQUEST_TIMEOUT = 0.9
|
|
# devices may reply a lot slower, as the call has to go wireless to them and come back
|
|
_DEVICE_REQUEST_TIMEOUT = DEFAULT_TIMEOUT
|
|
# when pinging, be extra patient
|
|
_PING_TIMEOUT = DEFAULT_TIMEOUT * 2
|
|
|
|
#
|
|
# Exceptions that may be raised by this API.
|
|
#
|
|
|
|
|
|
class NoReceiver(_KwException):
|
|
"""Raised when trying to talk through a previously open handle, when the
|
|
receiver is no longer available. Should only happen if the receiver is
|
|
physically disconnected from the machine, or its kernel driver module is
|
|
unloaded."""
|
|
pass
|
|
|
|
|
|
class NoSuchDevice(_KwException):
|
|
"""Raised when trying to reach a device number not paired to the receiver."""
|
|
pass
|
|
|
|
|
|
class DeviceUnreachable(_KwException):
|
|
"""Raised when a request is made to an unreachable (turned off) device."""
|
|
pass
|
|
|
|
|
|
#
|
|
#
|
|
#
|
|
|
|
|
|
def receivers():
|
|
"""List all the Linux devices exposed by the UR attached to the machine."""
|
|
for receiver_usb_id in _RECEIVER_USB_IDS:
|
|
for d in _hid.enumerate(receiver_usb_id):
|
|
yield d
|
|
|
|
|
|
def wired_devices():
|
|
for device_usb_id in _WIRED_DEVICE_IDS:
|
|
for dev in _hid.enumerate(device_usb_id):
|
|
yield dev
|
|
|
|
|
|
def notify_on_receivers_glib(callback):
|
|
"""Watch for matching devices and notifies the callback on the GLib thread."""
|
|
_hid.monitor_glib(callback, *_RECEIVER_USB_IDS, *_WIRED_DEVICE_IDS)
|
|
|
|
|
|
#
|
|
#
|
|
#
|
|
|
|
|
|
def open_path(path):
|
|
"""Checks if the given Linux device path points to the right UR device.
|
|
|
|
:param path: the Linux device path.
|
|
|
|
The UR physical device may expose multiple linux devices with the same
|
|
interface, so we have to check for the right one. At this moment the only
|
|
way to distinguish betheen them is to do a test ping on an invalid
|
|
(attached) device number (i.e., 0), expecting a 'ping failed' reply.
|
|
|
|
:returns: an open receiver handle if this is the right Linux device, or
|
|
``None``.
|
|
"""
|
|
return _hid.open_path(path)
|
|
|
|
|
|
def open():
|
|
"""Opens the first Logitech Unifying Receiver found attached to the machine.
|
|
|
|
:returns: An open file handle for the found receiver, or ``None``.
|
|
"""
|
|
for rawdevice in receivers():
|
|
handle = open_path(rawdevice.path)
|
|
if handle:
|
|
return handle
|
|
|
|
|
|
def close(handle):
|
|
"""Closes a HID device handle."""
|
|
if handle:
|
|
try:
|
|
if isinstance(handle, int):
|
|
_hid.close(handle)
|
|
else:
|
|
handle.close()
|
|
# _log.info("closed receiver handle %r", handle)
|
|
return True
|
|
except Exception:
|
|
# _log.exception("closing receiver handle %r", handle)
|
|
pass
|
|
|
|
return False
|
|
|
|
|
|
def write(handle, devnumber, data, long_message=False):
|
|
"""Writes some data to the receiver, addressed to a certain device.
|
|
|
|
:param handle: an open UR handle.
|
|
:param devnumber: attached device number.
|
|
:param data: data to send, up to 5 bytes.
|
|
|
|
The first two (required) bytes of data must be the SubId and address.
|
|
|
|
:raises NoReceiver: if the receiver is no longer available, i.e. has
|
|
been physically removed from the machine, or the kernel driver has been
|
|
unloaded. The handle will be closed automatically.
|
|
"""
|
|
# the data is padded to either 5 or 18 bytes
|
|
assert data is not None
|
|
assert isinstance(data, bytes), (repr(data), type(data))
|
|
|
|
if long_message or len(data) > _SHORT_MESSAGE_SIZE - 2 or data[:1] == b'\x82':
|
|
wdata = _pack('!BB18s', 0x11, devnumber, data)
|
|
else:
|
|
wdata = _pack('!BB5s', 0x10, devnumber, data)
|
|
if _log.isEnabledFor(_DEBUG):
|
|
_log.debug('(%s) <= w[%02X %02X %s %s]', handle, ord(wdata[:1]), devnumber, _strhex(wdata[2:4]), _strhex(wdata[4:]))
|
|
|
|
try:
|
|
_hid.write(int(handle), wdata)
|
|
except Exception as reason:
|
|
_log.error('write failed, assuming handle %r no longer available', handle)
|
|
close(handle)
|
|
raise NoReceiver(reason=reason)
|
|
|
|
|
|
def read(handle, timeout=DEFAULT_TIMEOUT):
|
|
"""Read some data from the receiver. Usually called after a write (feature
|
|
call), to get the reply.
|
|
|
|
:param: handle open handle to the receiver
|
|
:param: timeout how long to wait for a reply, in seconds
|
|
|
|
:returns: a tuple of (devnumber, message data), or `None`
|
|
|
|
:raises NoReceiver: if the receiver is no longer available, i.e. has
|
|
been physically removed from the machine, or the kernel driver has been
|
|
unloaded. The handle will be closed automatically.
|
|
"""
|
|
reply = _read(handle, timeout)
|
|
if reply:
|
|
return reply[1:]
|
|
|
|
|
|
# sanity checks on message report id and size
|
|
def check_message(data):
|
|
assert isinstance(data, bytes), (repr(data), type(data))
|
|
report_id = ord(data[:1])
|
|
if report_id in report_lengths: # is this an HID++ or DJ message?
|
|
if report_lengths.get(report_id) == len(data):
|
|
return True
|
|
else:
|
|
_log.warn('unexpected message size: report_id %02X message %s' % (report_id, _strhex(data)))
|
|
return False
|
|
|
|
|
|
def _read(handle, timeout):
|
|
"""Read an incoming packet from the receiver.
|
|
|
|
:returns: a tuple of (report_id, devnumber, data), or `None`.
|
|
|
|
:raises NoReceiver: if the receiver is no longer available, i.e. has
|
|
been physically removed from the machine, or the kernel driver has been
|
|
unloaded. The handle will be closed automatically.
|
|
"""
|
|
try:
|
|
# convert timeout to milliseconds, the hidapi expects it
|
|
timeout = int(timeout * 1000)
|
|
data = _hid.read(int(handle), _MAX_READ_SIZE, timeout)
|
|
except Exception as reason:
|
|
_log.warn('read failed, assuming handle %r no longer available', handle)
|
|
close(handle)
|
|
raise NoReceiver(reason=reason)
|
|
|
|
if data and check_message(data): # ignore messages that fail check
|
|
report_id = ord(data[:1])
|
|
devnumber = ord(data[1:2])
|
|
|
|
if _log.isEnabledFor(_DEBUG):
|
|
_log.debug('(%s) => r[%02X %02X %s %s]', handle, report_id, devnumber, _strhex(data[2:4]), _strhex(data[4:]))
|
|
|
|
return report_id, devnumber, data[2:]
|
|
|
|
|
|
#
|
|
#
|
|
#
|
|
|
|
|
|
def _skip_incoming(handle, ihandle, notifications_hook):
|
|
"""Read anything already in the input buffer.
|
|
|
|
Used by request() and ping() before their write.
|
|
"""
|
|
|
|
while True:
|
|
try:
|
|
# read whatever is already in the buffer, if any
|
|
data = _hid.read(ihandle, _MAX_READ_SIZE, 0)
|
|
except Exception as reason:
|
|
_log.error('read failed, assuming receiver %s no longer available', handle)
|
|
close(handle)
|
|
raise NoReceiver(reason=reason)
|
|
|
|
if data:
|
|
if check_message(data): # only process messages that pass check
|
|
# report_id = ord(data[:1])
|
|
if notifications_hook:
|
|
n = make_notification(ord(data[1:2]), data[2:])
|
|
if n:
|
|
notifications_hook(n)
|
|
else:
|
|
# nothing in the input buffer, we're done
|
|
return
|
|
|
|
|
|
def make_notification(devnumber, data):
|
|
"""Guess if this is a notification (and not just a request reply), and
|
|
return a Notification tuple if it is."""
|
|
|
|
sub_id = ord(data[:1])
|
|
if sub_id & 0x80 == 0x80:
|
|
# this is either a HID++1.0 register r/w, or an error reply
|
|
return
|
|
|
|
# DJ input records are not notifications
|
|
# it would be better to check for report_id 0x20 but that information is not sent here
|
|
if len(data) == _MEDIUM_MESSAGE_SIZE - 2 and (sub_id < 0x10):
|
|
return
|
|
|
|
address = ord(data[1:2])
|
|
if (
|
|
# standard HID++ 1.0 notification, SubId may be 0x40 - 0x7F
|
|
(sub_id >= 0x40) or # noqa: E131
|
|
# custom HID++1.0 battery events, where SubId is 0x07/0x0D
|
|
(sub_id in (0x07, 0x0D) and len(data) == 5 and data[4:5] == b'\x00') or
|
|
# custom HID++1.0 illumination event, where SubId is 0x17
|
|
(sub_id == 0x17 and len(data) == 5) or
|
|
# HID++ 2.0 feature notifications have the SoftwareID 0
|
|
(address & 0x0F == 0x00)
|
|
): # noqa: E129
|
|
return _HIDPP_Notification(devnumber, sub_id, address, data[2:])
|
|
|
|
|
|
_HIDPP_Notification = namedtuple('_HIDPP_Notification', ('devnumber', 'sub_id', 'address', 'data'))
|
|
_HIDPP_Notification.__str__ = lambda self: 'Notification(%d,%02X,%02X,%s)' % (
|
|
self.devnumber, self.sub_id, self.address, _strhex(self.data)
|
|
)
|
|
_HIDPP_Notification.__unicode__ = _HIDPP_Notification.__str__
|
|
DJ_NOTIFICATION_LENGTH = _MEDIUM_MESSAGE_SIZE - 4 # to allow easy distinguishing of DJ notifications
|
|
del namedtuple
|
|
|
|
#
|
|
#
|
|
#
|
|
|
|
|
|
# a very few requests (e.g., host switching) do not expect a reply, but use no_reply=True with extreme caution
|
|
def request(handle, devnumber, request_id, *params, no_reply=False, return_error=False, long_message=False):
|
|
"""Makes a feature call to a device and waits for a matching reply.
|
|
:param handle: an open UR handle.
|
|
:param devnumber: attached device number.
|
|
:param request_id: a 16-bit integer.
|
|
:param params: parameters for the feature call, 3 to 16 bytes.
|
|
:returns: the reply data, or ``None`` if some error occurred. or no reply expected
|
|
"""
|
|
|
|
# import inspect as _inspect
|
|
# print ('\n '.join(str(s) for s in _inspect.stack()))
|
|
|
|
assert isinstance(request_id, int)
|
|
if devnumber != 0xFF and request_id < 0x8000:
|
|
# For HID++ 2.0 feature requests, randomize the SoftwareId to make it
|
|
# easier to recognize the reply for this request. also, always set the
|
|
# most significant bit (8) in SoftwareId, to make notifications easier
|
|
# to distinguish from request replies.
|
|
# This only applies to peripheral requests, ofc.
|
|
request_id = (request_id & 0xFFF0) | 0x08 | _random_bits(3)
|
|
|
|
timeout = _RECEIVER_REQUEST_TIMEOUT if devnumber == 0xFF else _DEVICE_REQUEST_TIMEOUT
|
|
# be extra patient on long register read
|
|
if request_id & 0xFF00 == 0x8300:
|
|
timeout *= 2
|
|
|
|
if params:
|
|
params = b''.join(_pack('B', p) if isinstance(p, int) else p for p in params)
|
|
else:
|
|
params = b''
|
|
# if _log.isEnabledFor(_DEBUG):
|
|
# _log.debug("(%s) device %d request_id {%04X} params [%s]", handle, devnumber, request_id, _strhex(params))
|
|
request_data = _pack('!H', request_id) + params
|
|
|
|
ihandle = int(handle)
|
|
notifications_hook = getattr(handle, 'notifications_hook', None)
|
|
_skip_incoming(handle, ihandle, notifications_hook)
|
|
write(ihandle, devnumber, request_data, long_message)
|
|
|
|
if no_reply:
|
|
return None
|
|
|
|
# we consider timeout from this point
|
|
request_started = _timestamp()
|
|
delta = 0
|
|
|
|
while delta < timeout:
|
|
reply = _read(handle, timeout)
|
|
|
|
if reply:
|
|
report_id, reply_devnumber, reply_data = reply
|
|
if reply_devnumber == devnumber:
|
|
if report_id == 0x10 and reply_data[:1] == b'\x8F' and reply_data[1:3] == request_data[:2]:
|
|
error = ord(reply_data[3:4])
|
|
|
|
# if error == _hidpp10.ERROR.resource_error: # device unreachable
|
|
# _log.warn("(%s) device %d error on request {%04X}: unknown device", handle, devnumber, request_id)
|
|
# raise DeviceUnreachable(number=devnumber, request=request_id)
|
|
|
|
# if error == _hidpp10.ERROR.unknown_device: # unknown device
|
|
# _log.error("(%s) device %d error on request {%04X}: unknown device", handle, devnumber, request_id)
|
|
# raise NoSuchDevice(number=devnumber, request=request_id)
|
|
|
|
if _log.isEnabledFor(_DEBUG):
|
|
_log.debug(
|
|
'(%s) device 0x%02X error on request {%04X}: %d = %s', handle, devnumber, request_id, error,
|
|
_hidpp10.ERROR[error]
|
|
)
|
|
return _hidpp10.ERROR[error] if return_error else None
|
|
if reply_data[:1] == b'\xFF' and reply_data[1:3] == request_data[:2]:
|
|
# a HID++ 2.0 feature call returned with an error
|
|
error = ord(reply_data[3:4])
|
|
_log.error(
|
|
'(%s) device %d error on feature request {%04X}: %d = %s', handle, devnumber, request_id, error,
|
|
_hidpp20.ERROR[error]
|
|
)
|
|
raise _hidpp20.FeatureCallError(number=devnumber, request=request_id, error=error, params=params)
|
|
|
|
if reply_data[:2] == request_data[:2]:
|
|
if request_id & 0xFE00 == 0x8200:
|
|
# long registry r/w should return a long reply
|
|
assert report_id == 0x11
|
|
elif request_id & 0xFE00 == 0x8000:
|
|
# short registry r/w should return a short reply
|
|
assert report_id == 0x10
|
|
|
|
if devnumber == 0xFF:
|
|
if request_id == 0x83B5 or request_id == 0x81F1:
|
|
# these replies have to match the first parameter as well
|
|
if reply_data[2:3] == params[:1]:
|
|
return reply_data[2:]
|
|
else:
|
|
# hm, not matching my request, and certainly not a notification
|
|
continue
|
|
else:
|
|
return reply_data[2:]
|
|
else:
|
|
return reply_data[2:]
|
|
else:
|
|
# a reply was received, but did not match our request in any way
|
|
# reset the timeout starting point
|
|
request_started = _timestamp()
|
|
|
|
if notifications_hook:
|
|
n = make_notification(reply_devnumber, reply_data)
|
|
if n:
|
|
notifications_hook(n)
|
|
# elif _log.isEnabledFor(_DEBUG):
|
|
# _log.debug("(%s) ignoring reply %02X [%s]", handle, reply_devnumber, _strhex(reply_data))
|
|
# elif _log.isEnabledFor(_DEBUG):
|
|
# _log.debug("(%s) ignoring reply %02X [%s]", handle, reply_devnumber, _strhex(reply_data))
|
|
|
|
delta = _timestamp() - request_started
|
|
# if _log.isEnabledFor(_DEBUG):
|
|
# _log.debug("(%s) still waiting for reply, delta %f", handle, delta)
|
|
|
|
_log.warn(
|
|
'timeout (%0.2f/%0.2f) on device %d request {%04X} params [%s]', delta, timeout, devnumber, request_id,
|
|
_strhex(params)
|
|
)
|
|
# raise DeviceUnreachable(number=devnumber, request=request_id)
|
|
|
|
|
|
def ping(handle, devnumber, long_message=False):
|
|
"""Check if a device is connected to the receiver.
|
|
|
|
:returns: The HID protocol supported by the device, as a floating point number, if the device is active.
|
|
"""
|
|
if _log.isEnabledFor(_DEBUG):
|
|
_log.debug('(%s) pinging device %d', handle, devnumber)
|
|
|
|
# import inspect as _inspect
|
|
# print ('\n '.join(str(s) for s in _inspect.stack()))
|
|
|
|
assert devnumber != 0xFF
|
|
assert devnumber >= 0x00
|
|
assert devnumber < 0x0F
|
|
|
|
# randomize the SoftwareId and mark byte to be able to identify the ping
|
|
# reply, and set most significant (0x8) bit in SoftwareId so that the reply
|
|
# is always distinguishable from notifications
|
|
request_id = 0x0018 | _random_bits(3)
|
|
request_data = _pack('!HBBB', request_id, 0, 0, _random_bits(8))
|
|
|
|
ihandle = int(handle)
|
|
notifications_hook = getattr(handle, 'notifications_hook', None)
|
|
_skip_incoming(handle, ihandle, notifications_hook)
|
|
write(ihandle, devnumber, request_data, long_message)
|
|
|
|
# we consider timeout from this point
|
|
request_started = _timestamp()
|
|
delta = 0
|
|
|
|
while delta < _PING_TIMEOUT:
|
|
reply = _read(handle, _PING_TIMEOUT)
|
|
|
|
if reply:
|
|
report_id, reply_devnumber, reply_data = reply
|
|
if reply_devnumber == devnumber:
|
|
if reply_data[:2] == request_data[:2] and reply_data[4:5] == request_data[-1:]:
|
|
# HID++ 2.0+ device, currently connected
|
|
return ord(reply_data[2:3]) + ord(reply_data[3:4]) / 10.0
|
|
|
|
if report_id == 0x10 and reply_data[:1] == b'\x8F' and reply_data[1:3] == request_data[:2]:
|
|
assert reply_data[-1:] == b'\x00'
|
|
error = ord(reply_data[3:4])
|
|
|
|
if error == _hidpp10.ERROR.invalid_SubID__command: # a valid reply from a HID++ 1.0 device
|
|
return 1.0
|
|
|
|
if error == _hidpp10.ERROR.resource_error: # device unreachable
|
|
return
|
|
|
|
if error == _hidpp10.ERROR.unknown_device: # no paired device with that number
|
|
_log.error('(%s) device %d error on ping request: unknown device', handle, devnumber)
|
|
raise NoSuchDevice(number=devnumber, request=request_id)
|
|
|
|
if notifications_hook:
|
|
n = make_notification(reply_devnumber, reply_data)
|
|
if n:
|
|
notifications_hook(n)
|
|
# elif _log.isEnabledFor(_DEBUG):
|
|
# _log.debug("(%s) ignoring reply %02X [%s]", handle, reply_devnumber, _strhex(reply_data))
|
|
|
|
delta = _timestamp() - request_started
|
|
|
|
_log.warn('(%s) timeout (%0.2f/%0.2f) on device %d ping', handle, delta, _PING_TIMEOUT, devnumber)
|
|
# raise DeviceUnreachable(number=devnumber, request=request_id)
|