kopia lustrzana https://github.com/GuyCarver/MicroPython
82 wiersze
2.0 KiB
Python
82 wiersze
2.0 KiB
Python
# PWM driver.
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from pyb import Timer, Pin
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class PWM(object):
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"""docstring for PWMM"""
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#Dict pin name: timer #, channel #.
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PinChannels = {
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'X1': [(2,1), (5,1)],
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'X2': [(2,2), (5,2)],
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'X3': [(2,3), (5,3), (9,1)],
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'X4': [(2,4), (5,4), (9,2)],
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'X6': [(2,1), (8,1)],
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'X7': [(13, 1)],
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'X8': [(1,1), (8,1), (14,1)],
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'X9': [(4,1)],
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'X10': [(4,2)],
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'Y1': [(8,1)],
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'Y2': [(8,2)],
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'Y3': [(4,3), (10,1)],
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'Y4': [(4,4), (11,1)],
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'Y6': [(1,1)],
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'Y7': [(1,2), (8,2), (12,1)],
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'Y8': [(1,3), (8,3), (12,2)],
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'Y9': [(2,3)],
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'Y10': [(2,4)],
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'Y11': [(1,2), (8,2)],
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'Y12': [(1,3), (8,3)]
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}
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class PWMException(Exception):
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def __init__(self, msg):
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self.msg = msg
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@staticmethod
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def timerandchannel( pinname, timernum ):
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try:
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a = PWM.PinChannels[pinname]
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if timernum <= 0:
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return a[0]
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else:
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for v in a:
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if v[0] == timernum:
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return v
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except Exception as e :
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raise PWM.PWMException("Pin {} cannot be used for PWM".format(pinname))
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raise PWM.PWMException("Pin {} cannot use timer {}".format(pinname, timernum))
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def __init__( self, p, timernum, afreq = 100 ):
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isname = type(p) == str
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pinname = p if isname else p.name()
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timernum, channel = PWM.timerandchannel(pinname, timernum)
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if isname:
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p = Pin(pinname)
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self._timer = Timer(timernum, freq = afreq)
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self._channel = self._timer.channel(channel, Timer.PWM, pin = p)
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@property
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def pulse_width(self): return self._channel.pulse_width()
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@pulse_width.setter
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def pulse_width(self, value): self._channel.pulse_width(value)
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@property
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def pulse_width_percent(self): return self._channel.pulse_width_percent()
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@pulse_width_percent.setter
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def pulse_width_percent(self, value): self._channel.pulse_width_percent(value)
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@property
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def freq(self): return self._timer.freq()
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@freq.setter
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def freq(self, value): self._timer.freq(value)
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def callback(self, value):
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self._channel.callback(value)
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