emg_data_queue.py

# Copyright (c) 2016  Niklas Rosenstein
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

from __future__ import print_function
import collections
import myo
import threading
import time

class MyListener(myo.DeviceListener):

  def __init__(self, queue_size=8):
    self.lock = threading.Lock()
    self.emg_data_queue = collections.deque(maxlen=queue_size)

  def on_connect(self, device, timestamp, firmware_version):
    device.set_stream_emg(myo.StreamEmg.enabled)

  def on_emg_data(self, device, timestamp, emg_data):
    with self.lock:
      self.emg_data_queue.append((timestamp, emg_data))

  def get_emg_data(self):
    with self.lock:
      return list(self.emg_data_queue)

myo.init()
hub = myo.Hub()
try:
  listener = MyListener()
  hub.run(200, listener)
  while True:
    print(listener.get_emg_data())
    time.sleep(1.0)
finally:
  hub.shutdown()