1  # The MIT License (MIT)
 2  #
 3  # Copyright (c) 2019 Kevin J. Walters
 4  #
 5  # Permission is hereby granted, free of charge, to any person obtaining a copy
 6  # of this software and associated documentation files (the "Software"), to deal
 7  # in the Software without restriction, including without limitation the rights
 8  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9  # copies of the Software, and to permit persons to whom the Software is
10  # furnished to do so, subject to the following conditions:
11  #
12  # The above copyright notice and this permission notice shall be included in
13  # all copies or substantial portions of the Software.
14  #
15  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21  # THE SOFTWARE.
22  """
23  `adafruit_midi.timing_clock`
24  ================================================================================
25  
26  Timing Clock MIDI message.
27  
28  
29  * Author(s): Kevin J. Walters
30  
31  Implementation Notes
32  --------------------
33  
34  """
35  
36  from .midi_message import MIDIMessage
37  
38  __version__ = "0.0.0-auto.0"
39  __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_MIDI.git"
40  
41  
42  # Good to have this registered first as it occurs frequently when present
43  class TimingClock(MIDIMessage):
44      """Timing Clock MIDI message.
45  
46         This occurs 24 times per quarter note when synchronization is in use.
47         If this is not needed it's best to avoid this sending this high frequency
48         message to a CircuitPython device to reduce the amount of message processing.
49      """
50  
51      _STATUS = 0xF8
52      _STATUSMASK = 0xFF
53      LENGTH = 1
54  
55  
56  TimingClock.register_message_type()