1  # SPDX-FileCopyrightText: 2020 Kattni Rembor for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  """
 6  Timing for Adafruit LED Animation library.
 7  
 8  Author(s): Kattni Rembor
 9  """
10  
11  try:
12      from micropython import const
13  except ImportError:
14  
15      def const(value):  # pylint: disable=missing-docstring
16          return value
17  
18  
19  try:
20      from time import monotonic_ns
21  
22      monotonic_ns()  # Test monotonic_ns in 6.x
23  
24      def monotonic_ms():
25          """
26          Return monotonic time in milliseconds.
27          """
28          return monotonic_ns() // NANOS_PER_MS
29  
30  
31  except (ImportError, NotImplementedError):
32      import time
33  
34      def monotonic_ms():
35          """
36          Implementation of monotonic_ms for platforms without time.monotonic_ns
37          """
38          return int(time.monotonic() * MS_PER_SECOND)
39  
40  
41  NANOS_PER_MS = const(1000000)
42  MS_PER_SECOND = const(1000)