popufare/busunit-PIU/scripts/capture-mag-hid

#!/usr/bin/python3
#
# Copyright (c) 2019 Clementine Computing LLC.
#
# This file is part of PopuFare.
#
# PopuFare is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# PopuFare 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with PopuFare.  If not, see <https://www.gnu.org/licenses/>.
#

import os, sys, evdev, asyncio, os.path
from evdev import InputDevice, categorize, ecodes

dev_init = False
dev = { }

HID_NAME = 'HID c216:0180'

evfns_n = 13
evfns_bd = "/dev/input/"
evfns = [ ]

for x in range(evfns_n):
  fn = evfns_bd + "event" + str(x)
  if (os.path.exists(fn)):
    evfns.append(fn)

for evfn in evfns:
  _dev = evdev.InputDevice(evfn)
  print("device:", _dev.name)
  if _dev.name == HID_NAME:
    dev_init = True
    dev = _dev
    break

if not dev_init:
  print("could not find device, exiting")
  sys.exit(0)

print(dev)
print(dev.capabilities())
print(dev.capabilities(verbose=True))

dev.grab()

for event in dev.read_loop():
  if event.type == ecodes.EV_KEY:
    print(categorize(event))

sys.exit(0)


async def print_events(device):
  async for event in device.async_read_loop():
    print(device.path, evdev.categorize(event, sep=':'))

for device in dev:
  asyncio.ensure_future(print_events(dev))


print("...")