37 lines
1.5 KiB
Python
37 lines
1.5 KiB
Python
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# Utility for querying the current state of adc pins
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#
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# Copyright (C) 2019 Kevin O'Connor <kevin@koconnor.net>
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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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class QueryADC:
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def __init__(self, config):
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self.printer = config.get_printer()
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self.adc = {}
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gcode = self.printer.lookup_object('gcode')
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gcode.register_command("QUERY_ADC", self.cmd_QUERY_ADC,
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desc=self.cmd_QUERY_ADC_help)
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def register_adc(self, name, mcu_adc):
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self.adc[name] = mcu_adc
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cmd_QUERY_ADC_help = "Report the last value of an analog pin"
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def cmd_QUERY_ADC(self, params):
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gcode = self.printer.lookup_object('gcode')
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name = gcode.get_str('NAME', params, None)
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if name not in self.adc:
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objs = ['"%s"' % (n,) for n in sorted(self.adc.keys())]
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msg = "Available ADC objects: %s" % (', '.join(objs),)
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gcode.respond_info(msg)
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return
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value, timestamp = self.adc[name].get_last_value()
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msg = 'ADC object "%s" has value %.6f (timestamp %.3f)' % (
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name, value, timestamp)
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pullup = gcode.get_float('PULLUP', params, None, above=0.)
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if pullup is not None:
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v = max(.00001, min(.99999, value))
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r = pullup * v / (1.0 - v)
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msg += "\n resistance %.3f (with %.0f pullup)" % (r, pullup)
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gcode.respond_info(msg)
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def load_config(config):
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return QueryADC(config)
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