mirror of https://github.com/Desuuuu/klipper.git
40 lines
1.4 KiB
Python
40 lines
1.4 KiB
Python
# MCP4451 digipot code
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#
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# Copyright (C) 2018 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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import mcu
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WiperRegisters = [0x00, 0x01, 0x06, 0x07]
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class mcp4451:
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def __init__(self, config):
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printer = config.get_printer()
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# Read config parameters
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self.mcu = mcu.get_printer_mcu(printer, config.get('mcu', 'mcu'))
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i2c_addr = config.getint('i2c_address')
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scale = config.getfloat('scale', 1., above=0.)
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wipers = [None]*4
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for i in range(len(wipers)):
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val = config.getfloat('wiper_%d' % (i,), None,
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minval=0., maxval=scale)
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if val is not None:
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wipers[i] = int(val * 255. / scale + .5)
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# Setup i2c
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self.oid = self.mcu.create_oid()
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self.mcu.add_config_cmd(
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"config_i2c oid=%d bus=0 rate=100000 addr=%d" % (
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self.oid, i2c_addr))
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# Configure registers
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self.add_config_cmd(0x04, 0xff)
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self.add_config_cmd(0x0a, 0xff)
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for reg, val in zip(WiperRegisters, wipers):
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if val is not None:
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self.add_config_cmd(reg, val)
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def add_config_cmd(self, reg, val):
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self.mcu.add_config_cmd("i2c_write oid=%d data=%02x%02x" % (
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self.oid, (reg << 4) | ((val >> 8) & 0x03), val), is_init=True)
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def load_config_prefix(config):
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return mcp4451(config)
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