59 lines
1.4 KiB
Python
59 lines
1.4 KiB
Python
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""" Real Time Clock based on the nRF-family low power counter """
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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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TODO: Maintain hh:mm:ss as an array so we can report time
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without memory allocation.
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"""
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def __init__(self, counter):
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self.counter = counter
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self.uptime = 0
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self.set_time((12, 0, 0))
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def update(self):
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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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elapsed = split // 8
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self.lastcount += elapsed * 8
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self.lastcount &= (1 << 24) - 1
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self.uptime += elapsed
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self.ss += elapsed
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if self.ss >= 60:
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self.mm += self.ss // 60
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self.ss %= 60
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if self.mm >= 60:
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self.hh += self.mm // 60
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self.mm %= 60
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self.hh %= 24
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return True
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def set_time(self, t):
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self.lastcount = self.counter.counter()
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self.hh = t[0]
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self.mm = t[1]
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self.ss = t[2]
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def get_time(self):
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self.update()
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return (self.hh, self.mm, self.ss)
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