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8bca4cbcd9
Use the regular hardware pwm interface instead of relying on a custom interface. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
41 lines
1.6 KiB
Python
41 lines
1.6 KiB
Python
# Define GPIO as clock output
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#
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# Copyright (C) 2025 Timofey Titovets <nefelim4ag@gmail.com>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import logging
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class PrinterClockOutputPin:
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def __init__(self, config):
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self.name = config.get_name()
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self.printer = config.get_printer()
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ppins = self.printer.lookup_object('pins')
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self.mcu_pin = ppins.setup_pin('pwm', config.get('pin'))
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self.mcu = self.mcu_pin.get_mcu()
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self.frequency = config.getfloat('frequency', 100, above=(1/0.3),
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maxval=520000000)
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self.mcu_pin.setup_cycle_time(1. / self.frequency, True)
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self.mcu_pin.setup_max_duration(0.)
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self.mcu_pin.setup_start_value(0.5, 0.5)
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self.mcu.register_config_callback(self._build_config)
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def _build_config(self):
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mcu_freq = self.mcu.seconds_to_clock(1.0)
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cycle_ticks = int(mcu_freq // self.frequency)
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# validate frequency
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mcu_freq_rev = int(cycle_ticks * self.frequency)
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if mcu_freq_rev != mcu_freq:
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msg = """
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# Frequency output must be without remainder, %i != %i
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[%s]
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frequency = %f
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""" % (mcu_freq, mcu_freq_rev, self.name, self.frequency)
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raise self.printer.config_error(msg)
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value = int(0.5 * cycle_ticks)
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if value/cycle_ticks < 0.4:
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logging.warning("[%s] pulse width < 40%%" % (self.name))
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if value/cycle_ticks > 0.6:
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logging.warning("[%s] pulse width > 60%%" % (self.name))
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def load_config_prefix(config):
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return PrinterClockOutputPin(config)
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