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# SPDX-License-Identifier: LGPL-3.0-or-later
# Copyright (C) 2020 Daniel Thompson
"""nRF-family RTC driver
~~~~~~~~~~~~~~~~~~~~~~~~
"""
import machine
import time
#class Stim(object):
# def __init__(self):
# self(0)
#
# def __call__(self, v):
# self.c = v
#
# def counter(self):
# return self.c
class RTC(object):
"""Real Time Clock based on the nRF-family low power counter.
.. automethod:: __init__
"""
def __init__(self, counter):
"""Wrap an RTCounter to provide a fully fledged Real Time Clock.
If the PNVRAM is valid then we use it to initialize the RTC otherwise
we just make something up.
:param RTCounter counter: The RTCCounter channel to adopt.
"""
self.counter = counter
if machine.mem32[0x200039c0] == 0x1abe11ed and \
machine.mem32[0x200039dc] == 0x10adab1e:
self.lastcount = self.counter.counter()
self.offset = machine.mem32[0x200039c4]
self._uptime = machine.mem32[0x200039c8] // 125
else:
machine.mem32[0x200039c0] = 0x1abe11ed
machine.mem32[0x200039dc] = 0x10adab1e
self._uptime = 0
self.set_localtime((2020, 3, 1, 3, 0, 0, 0, 0))
def update(self):
"""Check for counter updates.
:returns: True of the wall time has changed, False otherwise.
"""
newcount = self.counter.counter()
split = newcount - self.lastcount
if split == 0:
return False
if split < 0:
split += (1 << 24)
self.lastcount += split
self.lastcount &= (1 << 24) - 1
self._uptime += split
machine.mem32[0x200039c8] = self._uptime * 125
return True
def set_localtime(self, t):
"""Set the current wall time.
:param sequence t:
Wall time formatted as (yyyy, mm, dd, HH, MM, SS), any
additional elements in sequence will be ignored.
"""
self.lastcount = self.counter.counter()
if len(t) < 8:
yyyy = t[0]
mm = t[1]
dd = t[2]
HH = t[3]
MM = t[4]
SS = t[5]
t = (yyyy, mm, dd, HH, MM, SS, 0, 0)
lt = time.mktime(t)
self.offset = lt - (self._uptime >> 3)
machine.mem32[0x200039c4] = self.offset
def get_localtime(self):
"""Get the current time and date.
:returns: Wall time formatted as (yyyy, mm, dd, HH, MM, SS, wday, yday)
"""
self.update()
return time.localtime(self.offset + (self._uptime >> 3))
def get_time(self):
"""Get the current time.
:returns: Wall time formatted as (HH, MM, SS)
"""
localtime = self.get_localtime()
return localtime[3:6]
def time(self):
"""Get time in the same format as time.time"""
return self.offset + (self._uptime >> 3)
@property
def uptime(self):
"""Provide the current uptime in seconds."""
return self._uptime // 8
def get_uptime_ms(self):
"""Return the current uptime in milliseconds."""
return self._uptime * 125
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