f221e2f8a4
So... waking up once per second turns out to be a dumb idea because it
regresses the stop watch and HRS tools (which now also only wake up once
per second).
Undo this change but sprinkle a few more micropython.native decorations
on methods used on the wakeup path to minimise power.
Fixes: fb18705b9b ("manager/rtc: Experimental power saving technique")
Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
124 lines
3.3 KiB
Python
124 lines
3.3 KiB
Python
# SPDX-License-Identifier: LGPL-3.0-or-later
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# Copyright (C) 2020 Daniel Thompson
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"""nRF-family RTC driver
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~~~~~~~~~~~~~~~~~~~~~~~~
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"""
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import machine
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import micropython
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import time
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#class Stim(object):
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# def __init__(self):
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# self(0)
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#
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# def __call__(self, v):
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# self.c = v
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#
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# def counter(self):
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# return self.c
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class RTC(object):
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"""Real Time Clock based on the nRF-family low power counter.
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.. automethod:: __init__
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"""
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def __init__(self, counter):
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"""Wrap an RTCounter to provide a fully fledged Real Time Clock.
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If the PNVRAM is valid then we use it to initialize the RTC otherwise
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we just make something up.
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:param RTCounter counter: The RTCCounter channel to adopt.
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"""
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self.counter = counter
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if machine.mem32[0x200039c0] == 0x1abe11ed and \
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machine.mem32[0x200039dc] == 0x10adab1e:
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self.lastcount = self.counter.counter()
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self.offset = machine.mem32[0x200039c4]
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self._uptime = machine.mem32[0x200039c8] // 125
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else:
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machine.mem32[0x200039c0] = 0x1abe11ed
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machine.mem32[0x200039dc] = 0x10adab1e
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self._uptime = 0
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self.set_localtime((2020, 3, 1, 3, 0, 0, 0, 0))
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@micropython.native
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def update(self):
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"""Check for counter updates.
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:returns: True of the wall time has changed, False otherwise.
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"""
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newcount = self.counter.counter()
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split = newcount - self.lastcount
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if split == 0:
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return False
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if split < 0:
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split += (1 << 24)
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self.lastcount += split
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self.lastcount &= (1 << 24) - 1
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uptime = self._uptime
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uptime += split
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machine.mem32[0x200039c8] = uptime * 125
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self._uptime = uptime
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return True
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def set_localtime(self, t):
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"""Set the current wall time.
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:param sequence t:
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Wall time formatted as (yyyy, mm, dd, HH, MM, SS), any
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additional elements in sequence will be ignored.
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"""
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self.lastcount = self.counter.counter()
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if len(t) < 8:
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yyyy = t[0]
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mm = t[1]
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dd = t[2]
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HH = t[3]
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MM = t[4]
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SS = t[5]
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t = (yyyy, mm, dd, HH, MM, SS, 0, 0)
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lt = time.mktime(t)
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self.offset = lt - (self._uptime >> 3)
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machine.mem32[0x200039c4] = self.offset
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def get_localtime(self):
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"""Get the current time and date.
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:returns: Wall time formatted as (yyyy, mm, dd, HH, MM, SS, wday, yday)
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"""
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self.update()
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return time.localtime(self.offset + (self._uptime >> 3))
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def get_time(self):
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"""Get the current time.
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:returns: Wall time formatted as (HH, MM, SS)
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"""
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localtime = self.get_localtime()
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return localtime[3:6]
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@micropython.native
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def time(self):
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"""Get time in the same format as time.time"""
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return self.offset + (self._uptime >> 3)
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@property
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def uptime(self):
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"""Provide the current uptime in seconds."""
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return self._uptime // 8
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@micropython.native
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def get_uptime_ms(self):
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"""Return the current uptime in milliseconds."""
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return self._uptime * 125
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