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37 lines
1.5 KiB
Python
37 lines
1.5 KiB
Python
# MCP4018 digipot support
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#
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# Copyright (C) 2019-2025 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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from . import bus
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class mcp4018:
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def __init__(self, config):
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self.printer = config.get_printer()
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self.i2c = bus.MCU_I2C_from_config(config, default_addr=0x2f)
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self.scale = config.getfloat('scale', 1., above=0.)
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self.start_value = config.getfloat('wiper',
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minval=0., maxval=self.scale)
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config.get_printer().register_event_handler("klippy:connect",
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self.handle_connect)
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# Register commands
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self.name = config.get_name().split()[1]
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gcode = self.printer.lookup_object('gcode')
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gcode.register_mux_command("SET_DIGIPOT", "DIGIPOT", self.name,
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self.cmd_SET_DIGIPOT,
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desc=self.cmd_SET_DIGIPOT_help)
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def handle_connect(self):
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self.set_dac(self.start_value)
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def set_dac(self, value):
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val = int(value * 127. / self.scale + .5)
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self.i2c.i2c_write([val])
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cmd_SET_DIGIPOT_help = "Set digipot value"
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def cmd_SET_DIGIPOT(self, gcmd):
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wiper = gcmd.get_float('WIPER', minval=0., maxval=self.scale)
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if wiper is not None:
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self.set_dac(wiper)
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gcmd.respond_info("New value for DIGIPOT = %s, wiper = %.2f"
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% (self.name, wiper))
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def load_config_prefix(config):
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return mcp4018(config)
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