src/adafruit_blinka/agnostic/time.py

   1 """Platform agnostic time implementation"""
   2
   3 from adafruit_blinka import agnostic
   4
   5 # We intentionally are patching into this namespace so skip the wildcard check.
   6 # pylint: disable=unused-wildcard-import,wildcard-import
   7
   8 if agnostic.implementation == "circuitpython":
   9     from time import *
  10 elif agnostic.implementation == "micropython":
  11     import utime
  12     from utime import sleep
  13
  14     from ucollections import namedtuple
  15
  16     _struct_time = namedtuple(
  17         "struct_time",
  18         (
  19             "tm_year",
  20             "tm_mon",
  21             "tm_mday",
  22             "tm_hour",
  23             "tm_min",
  24             "tm_sec",
  25             "tm_wday",
  26             "tm_yday",
  27             "tm_isdst",
  28         ),
  29     )
  30
  31     # pylint: disable=too-many-arguments
  32     def _marshal_time(
  33         tm_year,
  34         tm_mon,
  35         tm_mday,
  36         tm_hour=0,
  37         tm_min=0,
  38         tm_sec=0,
  39         tm_wday=-1,
  40         tm_yday=-1,
  41         tm_isdst=-1,
  42     ):
  43         """Construct struct_time with default values."""
  44         _struct_time(
  45             tm_year,
  46             tm_mon,
  47             tm_mday,
  48             tm_hour,
  49             tm_min,
  50             tm_sec,
  51             tm_wday,
  52             tm_yday,
  53             tm_isdst,
  54         )
  55
  56     def struct_time(time_tuple):
  57         """Create a struct_time"""
  58         return _marshal_time(*time_tuple)
  59
  60     # pylint: disable=invalid-name
  61     _total_ms = 0
  62     _prev_ticks_ms = utime.ticks_ms()
  63
  64     def monotonic():
  65         """A monotonically increasing time in seconds. No defined start time."""
  66         # Assumes that monotonic is called more frequently than the wraparound of micropython's
  67         # utime.ticks_ms()
  68         global _prev_ticks_ms, _total_ms  # pylint: disable=global-statement
  69         ticks_ms = utime.ticks_ms()
  70         _total_ms += utime.ticks_diff(ticks_ms, _prev_ticks_ms)
  71         _prev_ticks_ms = ticks_ms
  72         return _total_ms * 0.001